Revendor hashicorp/terraform (#697)

* revendor hashicorp/terraform @0.10.1

* revendor hashicorp/go-plugin

vendor/github.com/armon/go-radix/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Armon Dadgar
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/armon/go-radix/README.md

@@ -0,0 +1,38 @@
+go-radix [![Build Status](https://travis-ci.org/armon/go-radix.png)](https://travis-ci.org/armon/go-radix)
+=========
+
+Provides the `radix` package that implements a [radix tree](http://en.wikipedia.org/wiki/Radix_tree).
+The package only provides a single `Tree` implementation, optimized for sparse nodes.
+
+As a radix tree, it provides the following:
+ * O(k) operations. In many cases, this can be faster than a hash table since
+   the hash function is an O(k) operation, and hash tables have very poor cache locality.
+ * Minimum / Maximum value lookups
+ * Ordered iteration
+
+For an immutable variant, see [go-immutable-radix](https://github.com/hashicorp/go-immutable-radix).
+
+Documentation
+=============
+
+The full documentation is available on [Godoc](http://godoc.org/github.com/armon/go-radix).
+
+Example
+=======
+
+Below is a simple example of usage
+
+```go
+// Create a tree
+r := radix.New()
+r.Insert("foo", 1)
+r.Insert("bar", 2)
+r.Insert("foobar", 2)
+
+// Find the longest prefix match
+m, _, _ := r.LongestPrefix("foozip")
+if m != "foo" {
+    panic("should be foo")
+}
+```
+

vendor/github.com/armon/go-radix/radix.go

@@ -0,0 +1,543 @@
+package radix
+
+import (
+	"sort"
+	"strings"
+)
+
+// WalkFn is used when walking the tree. Takes a
+// key and value, returning if iteration should
+// be terminated.
+type WalkFn func(s string, v interface{}) bool
+
+// leafNode is used to represent a value
+type leafNode struct {
+	key string
+	val interface{}
+}
+
+// edge is used to represent an edge node
+type edge struct {
+	label byte
+	node  *node
+}
+
+type node struct {
+	// leaf is used to store possible leaf
+	leaf *leafNode
+
+	// prefix is the common prefix we ignore
+	prefix string
+
+	// Edges should be stored in-order for iteration.
+	// We avoid a fully materialized slice to save memory,
+	// since in most cases we expect to be sparse
+	edges edges
+}
+
+func (n *node) isLeaf() bool {
+	return n.leaf != nil
+}
+
+func (n *node) addEdge(e edge) {
+	n.edges = append(n.edges, e)
+	n.edges.Sort()
+}
+
+func (n *node) replaceEdge(e edge) {
+	num := len(n.edges)
+	idx := sort.Search(num, func(i int) bool {
+		return n.edges[i].label >= e.label
+	})
+	if idx < num && n.edges[idx].label == e.label {
+		n.edges[idx].node = e.node
+		return
+	}
+	panic("replacing missing edge")
+}
+
+func (n *node) getEdge(label byte) *node {
+	num := len(n.edges)
+	idx := sort.Search(num, func(i int) bool {
+		return n.edges[i].label >= label
+	})
+	if idx < num && n.edges[idx].label == label {
+		return n.edges[idx].node
+	}
+	return nil
+}
+
+func (n *node) delEdge(label byte) {
+	num := len(n.edges)
+	idx := sort.Search(num, func(i int) bool {
+		return n.edges[i].label >= label
+	})
+	if idx < num && n.edges[idx].label == label {
+		copy(n.edges[idx:], n.edges[idx+1:])
+		n.edges[len(n.edges)-1] = edge{}
+		n.edges = n.edges[:len(n.edges)-1]
+	}
+}
+
+type edges []edge
+
+func (e edges) Len() int {
+	return len(e)
+}
+
+func (e edges) Less(i, j int) bool {
+	return e[i].label < e[j].label
+}
+
+func (e edges) Swap(i, j int) {
+	e[i], e[j] = e[j], e[i]
+}
+
+func (e edges) Sort() {
+	sort.Sort(e)
+}
+
+// Tree implements a radix tree. This can be treated as a
+// Dictionary abstract data type. The main advantage over
+// a standard hash map is prefix-based lookups and
+// ordered iteration,
+type Tree struct {
+	root *node
+	size int
+}
+
+// New returns an empty Tree
+func New() *Tree {
+	return NewFromMap(nil)
+}
+
+// NewFromMap returns a new tree containing the keys
+// from an existing map
+func NewFromMap(m map[string]interface{}) *Tree {
+	t := &Tree{root: &node{}}
+	for k, v := range m {
+		t.Insert(k, v)
+	}
+	return t
+}
+
+// Len is used to return the number of elements in the tree
+func (t *Tree) Len() int {
+	return t.size
+}
+
+// longestPrefix finds the length of the shared prefix
+// of two strings
+func longestPrefix(k1, k2 string) int {
+	max := len(k1)
+	if l := len(k2); l < max {
+		max = l
+	}
+	var i int
+	for i = 0; i < max; i++ {
+		if k1[i] != k2[i] {
+			break
+		}
+	}
+	return i
+}
+
+// Insert is used to add a newentry or update
+// an existing entry. Returns if updated.
+func (t *Tree) Insert(s string, v interface{}) (interface{}, bool) {
+	var parent *node
+	n := t.root
+	search := s
+	for {
+		// Handle key exhaution
+		if len(search) == 0 {
+			if n.isLeaf() {
+				old := n.leaf.val
+				n.leaf.val = v
+				return old, true
+			}
+
+			n.leaf = &leafNode{
+				key: s,
+				val: v,
+			}
+			t.size++
+			return nil, false
+		}
+
+		// Look for the edge
+		parent = n
+		n = n.getEdge(search[0])
+
+		// No edge, create one
+		if n == nil {
+			e := edge{
+				label: search[0],
+				node: &node{
+					leaf: &leafNode{
+						key: s,
+						val: v,
+					},
+					prefix: search,
+				},
+			}
+			parent.addEdge(e)
+			t.size++
+			return nil, false
+		}
+
+		// Determine longest prefix of the search key on match
+		commonPrefix := longestPrefix(search, n.prefix)
+		if commonPrefix == len(n.prefix) {
+			search = search[commonPrefix:]
+			continue
+		}
+
+		// Split the node
+		t.size++
+		child := &node{
+			prefix: search[:commonPrefix],
+		}
+		parent.replaceEdge(edge{
+			label: search[0],
+			node:  child,
+		})
+
+		// Restore the existing node
+		child.addEdge(edge{
+			label: n.prefix[commonPrefix],
+			node:  n,
+		})
+		n.prefix = n.prefix[commonPrefix:]
+
+		// Create a new leaf node
+		leaf := &leafNode{
+			key: s,
+			val: v,
+		}
+
+		// If the new key is a subset, add to to this node
+		search = search[commonPrefix:]
+		if len(search) == 0 {
+			child.leaf = leaf
+			return nil, false
+		}
+
+		// Create a new edge for the node
+		child.addEdge(edge{
+			label: search[0],
+			node: &node{
+				leaf:   leaf,
+				prefix: search,
+			},
+		})
+		return nil, false
+	}
+}
+
+// Delete is used to delete a key, returning the previous
+// value and if it was deleted
+func (t *Tree) Delete(s string) (interface{}, bool) {
+	var parent *node
+	var label byte
+	n := t.root
+	search := s
+	for {
+		// Check for key exhaution
+		if len(search) == 0 {
+			if !n.isLeaf() {
+				break
+			}
+			goto DELETE
+		}
+
+		// Look for an edge
+		parent = n
+		label = search[0]
+		n = n.getEdge(label)
+		if n == nil {
+			break
+		}
+
+		// Consume the search prefix
+		if strings.HasPrefix(search, n.prefix) {
+			search = search[len(n.prefix):]
+		} else {
+			break
+		}
+	}
+	return nil, false
+
+DELETE:
+	// Delete the leaf
+	leaf := n.leaf
+	n.leaf = nil
+	t.size--
+
+	// Check if we should delete this node from the parent
+	if parent != nil && len(n.edges) == 0 {
+		parent.delEdge(label)
+	}
+
+	// Check if we should merge this node
+	if n != t.root && len(n.edges) == 1 {
+		n.mergeChild()
+	}
+
+	// Check if we should merge the parent's other child
+	if parent != nil && parent != t.root && len(parent.edges) == 1 && !parent.isLeaf() {
+		parent.mergeChild()
+	}
+
+	return leaf.val, true
+}
+
+// DeletePrefix is used to delete the subtree under a prefix
+// Returns how many nodes were deleted
+// Use this to delete large subtrees efficiently
+func (t *Tree) DeletePrefix(s string) int {
+	return t.deletePrefix(nil, t.root, s)
+}
+
+// delete does a recursive deletion
+func (t *Tree) deletePrefix(parent, n *node, prefix string) int {
+	// Check for key exhaustion
+	if len(prefix) == 0 {
+		// Remove the leaf node
+		subTreeSize := 0
+		//recursively walk from all edges of the node to be deleted
+		recursiveWalk(n, func(s string, v interface{}) bool {
+			subTreeSize++
+			return false
+		})
+		if n.isLeaf() {
+			n.leaf = nil
+		}
+		n.edges = nil // deletes the entire subtree
+
+		// Check if we should merge the parent's other child
+		if parent != nil && parent != t.root && len(parent.edges) == 1 && !parent.isLeaf() {
+			parent.mergeChild()
+		}
+		t.size -= subTreeSize
+		return subTreeSize
+	}
+
+	// Look for an edge
+	label := prefix[0]
+	child := n.getEdge(label)
+	if child == nil || (!strings.HasPrefix(child.prefix, prefix) && !strings.HasPrefix(prefix, child.prefix)) {
+		return 0
+	}
+
+	// Consume the search prefix
+	if len(child.prefix) > len(prefix) {
+		prefix = prefix[len(prefix):]
+	} else {
+		prefix = prefix[len(child.prefix):]
+	}
+	return t.deletePrefix(n, child, prefix)
+}
+
+func (n *node) mergeChild() {
+	e := n.edges[0]
+	child := e.node
+	n.prefix = n.prefix + child.prefix
+	n.leaf = child.leaf
+	n.edges = child.edges
+}
+
+// Get is used to lookup a specific key, returning
+// the value and if it was found
+func (t *Tree) Get(s string) (interface{}, bool) {
+	n := t.root
+	search := s
+	for {
+		// Check for key exhaution
+		if len(search) == 0 {
+			if n.isLeaf() {
+				return n.leaf.val, true
+			}
+			break
+		}
+
+		// Look for an edge
+		n = n.getEdge(search[0])
+		if n == nil {
+			break
+		}
+
+		// Consume the search prefix
+		if strings.HasPrefix(search, n.prefix) {
+			search = search[len(n.prefix):]
+		} else {
+			break
+		}
+	}
+	return nil, false
+}
+
+// LongestPrefix is like Get, but instead of an
+// exact match, it will return the longest prefix match.
+func (t *Tree) LongestPrefix(s string) (string, interface{}, bool) {
+	var last *leafNode
+	n := t.root
+	search := s
+	for {
+		// Look for a leaf node
+		if n.isLeaf() {
+			last = n.leaf
+		}
+
+		// Check for key exhaution
+		if len(search) == 0 {
+			break
+		}
+
+		// Look for an edge
+		n = n.getEdge(search[0])
+		if n == nil {
+			break
+		}
+
+		// Consume the search prefix
+		if strings.HasPrefix(search, n.prefix) {
+			search = search[len(n.prefix):]
+		} else {
+			break
+		}
+	}
+	if last != nil {
+		return last.key, last.val, true
+	}
+	return "", nil, false
+}
+
+// Minimum is used to return the minimum value in the tree
+func (t *Tree) Minimum() (string, interface{}, bool) {
+	n := t.root
+	for {
+		if n.isLeaf() {
+			return n.leaf.key, n.leaf.val, true
+		}
+		if len(n.edges) > 0 {
+			n = n.edges[0].node
+		} else {
+			break
+		}
+	}
+	return "", nil, false
+}
+
+// Maximum is used to return the maximum value in the tree
+func (t *Tree) Maximum() (string, interface{}, bool) {
+	n := t.root
+	for {
+		if num := len(n.edges); num > 0 {
+			n = n.edges[num-1].node
+			continue
+		}
+		if n.isLeaf() {
+			return n.leaf.key, n.leaf.val, true
+		}
+		break
+	}
+	return "", nil, false
+}
+
+// Walk is used to walk the tree
+func (t *Tree) Walk(fn WalkFn) {
+	recursiveWalk(t.root, fn)
+}
+
+// WalkPrefix is used to walk the tree under a prefix
+func (t *Tree) WalkPrefix(prefix string, fn WalkFn) {
+	n := t.root
+	search := prefix
+	for {
+		// Check for key exhaution
+		if len(search) == 0 {
+			recursiveWalk(n, fn)
+			return
+		}
+
+		// Look for an edge
+		n = n.getEdge(search[0])
+		if n == nil {
+			break
+		}
+
+		// Consume the search prefix
+		if strings.HasPrefix(search, n.prefix) {
+			search = search[len(n.prefix):]
+
+		} else if strings.HasPrefix(n.prefix, search) {
+			// Child may be under our search prefix
+			recursiveWalk(n, fn)
+			return
+		} else {
+			break
+		}
+	}
+
+}
+
+// WalkPath is used to walk the tree, but only visiting nodes
+// from the root down to a given leaf. Where WalkPrefix walks
+// all the entries *under* the given prefix, this walks the
+// entries *above* the given prefix.
+func (t *Tree) WalkPath(path string, fn WalkFn) {
+	n := t.root
+	search := path
+	for {
+		// Visit the leaf values if any
+		if n.leaf != nil && fn(n.leaf.key, n.leaf.val) {
+			return
+		}
+
+		// Check for key exhaution
+		if len(search) == 0 {
+			return
+		}
+
+		// Look for an edge
+		n = n.getEdge(search[0])
+		if n == nil {
+			return
+		}
+
+		// Consume the search prefix
+		if strings.HasPrefix(search, n.prefix) {
+			search = search[len(n.prefix):]
+		} else {
+			break
+		}
+	}
+}
+
+// recursiveWalk is used to do a pre-order walk of a node
+// recursively. Returns true if the walk should be aborted
+func recursiveWalk(n *node, fn WalkFn) bool {
+	// Visit the leaf values if any
+	if n.leaf != nil && fn(n.leaf.key, n.leaf.val) {
+		return true
+	}
+
+	// Recurse on the children
+	for _, e := range n.edges {
+		if recursiveWalk(e.node, fn) {
+			return true
+		}
+	}
+	return false
+}
+
+// ToMap is used to walk the tree and convert it into a map
+func (t *Tree) ToMap() map[string]interface{} {
+	out := make(map[string]interface{}, t.size)
+	t.Walk(func(k string, v interface{}) bool {
+		out[k] = v
+		return false
+	})
+	return out
+}

vendor/github.com/bgentry/speakeasy/LICENSE

@@ -0,0 +1,24 @@
+MIT License
+
+Copyright (c) 2017 Blake Gentry
+
+This license applies to the non-Windows portions of this library. The Windows
+portion maintains its own Apache 2.0 license.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/bgentry/speakeasy/LICENSE_WINDOWS

@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
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+   the copyright owner that is granting the License.
+
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+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
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+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+   implied, including, without limitation, any warranties or conditions
+   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
+   and charge a fee for, acceptance of support, warranty, indemnity,
+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
+   replaced with your own identifying information. (Don't include
+   the brackets!)  The text should be enclosed in the appropriate
+   comment syntax for the file format. We also recommend that a
+   file or class name and description of purpose be included on the
+   same "printed page" as the copyright notice for easier
+   identification within third-party archives.
+
+Copyright [2013] [the CloudFoundry Authors]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

vendor/github.com/bgentry/speakeasy/Readme.md

@@ -0,0 +1,30 @@
+# Speakeasy
+
+This package provides cross-platform Go (#golang) helpers for taking user input
+from the terminal while not echoing the input back (similar to `getpasswd`). The
+package uses syscalls to avoid any dependence on cgo, and is therefore
+compatible with cross-compiling.
+
+[![GoDoc](https://godoc.org/github.com/bgentry/speakeasy?status.png)][godoc]
+
+## Unicode
+
+Multi-byte unicode characters work successfully on Mac OS X. On Windows,
+however, this may be problematic (as is UTF in general on Windows). Other
+platforms have not been tested.
+
+## License
+
+The code herein was not written by me, but was compiled from two separate open
+source packages. Unix portions were imported from [gopass][gopass], while
+Windows portions were imported from the [CloudFoundry Go CLI][cf-cli]'s
+[Windows terminal helpers][cf-ui-windows].
+
+The [license for the windows portion](./LICENSE_WINDOWS) has been copied exactly
+from the source (though I attempted to fill in the correct owner in the
+boilerplate copyright notice).
+
+[cf-cli]: https://github.com/cloudfoundry/cli "CloudFoundry Go CLI"
+[cf-ui-windows]: https://github.com/cloudfoundry/cli/blob/master/src/cf/terminal/ui_windows.go "CloudFoundry Go CLI Windows input helpers"
+[godoc]: https://godoc.org/github.com/bgentry/speakeasy "speakeasy on Godoc.org"
+[gopass]: https://code.google.com/p/gopass "gopass"

vendor/github.com/bgentry/speakeasy/speakeasy.go

@@ -0,0 +1,49 @@
+package speakeasy
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// Ask the user to enter a password with input hidden. prompt is a string to
+// display before the user's input. Returns the provided password, or an error
+// if the command failed.
+func Ask(prompt string) (password string, err error) {
+	return FAsk(os.Stdout, prompt)
+}
+
+// FAsk is the same as Ask, except it is possible to specify the file to write
+// the prompt to. If 'nil' is passed as the writer, no prompt will be written.
+func FAsk(wr io.Writer, prompt string) (password string, err error) {
+	if wr != nil && prompt != "" {
+		fmt.Fprint(wr, prompt) // Display the prompt.
+	}
+	password, err = getPassword()
+
+	// Carriage return after the user input.
+	if wr != nil {
+		fmt.Fprintln(wr, "")
+	}
+	return
+}
+
+func readline() (value string, err error) {
+	var valb []byte
+	var n int
+	b := make([]byte, 1)
+	for {
+		// read one byte at a time so we don't accidentally read extra bytes
+		n, err = os.Stdin.Read(b)
+		if err != nil && err != io.EOF {
+			return "", err
+		}
+		if n == 0 || b[0] == '\n' {
+			break
+		}
+		valb = append(valb, b[0])
+	}
+
+	return strings.TrimSuffix(string(valb), "\r"), nil
+}

vendor/github.com/bgentry/speakeasy/speakeasy_unix.go

@@ -0,0 +1,93 @@
+// based on https://code.google.com/p/gopass
+// Author: johnsiilver@gmail.com (John Doak)
+//
+// Original code is based on code by RogerV in the golang-nuts thread:
+// https://groups.google.com/group/golang-nuts/browse_thread/thread/40cc41e9d9fc9247
+
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package speakeasy
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+)
+
+const sttyArg0 = "/bin/stty"
+
+var (
+	sttyArgvEOff = []string{"stty", "-echo"}
+	sttyArgvEOn  = []string{"stty", "echo"}
+)
+
+// getPassword gets input hidden from the terminal from a user. This is
+// accomplished by turning off terminal echo, reading input from the user and
+// finally turning on terminal echo.
+func getPassword() (password string, err error) {
+	sig := make(chan os.Signal, 10)
+	brk := make(chan bool)
+
+	// File descriptors for stdin, stdout, and stderr.
+	fd := []uintptr{os.Stdin.Fd(), os.Stdout.Fd(), os.Stderr.Fd()}
+
+	// Setup notifications of termination signals to channel sig, create a process to
+	// watch for these signals so we can turn back on echo if need be.
+	signal.Notify(sig, syscall.SIGHUP, syscall.SIGINT, syscall.SIGKILL, syscall.SIGQUIT,
+		syscall.SIGTERM)
+	go catchSignal(fd, sig, brk)
+
+	// Turn off the terminal echo.
+	pid, err := echoOff(fd)
+	if err != nil {
+		return "", err
+	}
+
+	// Turn on the terminal echo and stop listening for signals.
+	defer signal.Stop(sig)
+	defer close(brk)
+	defer echoOn(fd)
+
+	syscall.Wait4(pid, nil, 0, nil)
+
+	line, err := readline()
+	if err == nil {
+		password = strings.TrimSpace(line)
+	} else {
+		err = fmt.Errorf("failed during password entry: %s", err)
+	}
+
+	return password, err
+}
+
+// echoOff turns off the terminal echo.
+func echoOff(fd []uintptr) (int, error) {
+	pid, err := syscall.ForkExec(sttyArg0, sttyArgvEOff, &syscall.ProcAttr{Dir: "", Files: fd})
+	if err != nil {
+		return 0, fmt.Errorf("failed turning off console echo for password entry:\n\t%s", err)
+	}
+	return pid, nil
+}
+
+// echoOn turns back on the terminal echo.
+func echoOn(fd []uintptr) {
+	// Turn on the terminal echo.
+	pid, e := syscall.ForkExec(sttyArg0, sttyArgvEOn, &syscall.ProcAttr{Dir: "", Files: fd})
+	if e == nil {
+		syscall.Wait4(pid, nil, 0, nil)
+	}
+}
+
+// catchSignal tries to catch SIGKILL, SIGQUIT and SIGINT so that we can turn
+// terminal echo back on before the program ends. Otherwise the user is left
+// with echo off on their terminal.
+func catchSignal(fd []uintptr, sig chan os.Signal, brk chan bool) {
+	select {
+	case <-sig:
+		echoOn(fd)
+		os.Exit(-1)
+	case <-brk:
+	}
+}

vendor/github.com/bgentry/speakeasy/speakeasy_windows.go

@@ -0,0 +1,41 @@
+// +build windows
+
+package speakeasy
+
+import (
+	"syscall"
+)
+
+// SetConsoleMode function can be used to change value of ENABLE_ECHO_INPUT:
+// http://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
+const ENABLE_ECHO_INPUT = 0x0004
+
+func getPassword() (password string, err error) {
+	var oldMode uint32
+
+	err = syscall.GetConsoleMode(syscall.Stdin, &oldMode)
+	if err != nil {
+		return
+	}
+
+	var newMode uint32 = (oldMode &^ ENABLE_ECHO_INPUT)
+
+	err = setConsoleMode(syscall.Stdin, newMode)
+	defer setConsoleMode(syscall.Stdin, oldMode)
+	if err != nil {
+		return
+	}
+
+	return readline()
+}
+
+func setConsoleMode(console syscall.Handle, mode uint32) (err error) {
+	dll := syscall.MustLoadDLL("kernel32")
+	proc := dll.MustFindProc("SetConsoleMode")
+	r, _, err := proc.Call(uintptr(console), uintptr(mode))
+
+	if r == 0 {
+		return err
+	}
+	return nil
+}

vendor/github.com/hashicorp/go-hclog/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 HashiCorp
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/hashicorp/go-hclog/README.md

@@ -0,0 +1,123 @@
+# go-hclog
+
+[![Go Documentation](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)][godocs]
+
+[godocs]: https://godoc.org/github.com/hashicorp/go-hclog
+
+`go-hclog` is a package for Go that provides a simple key/value logging
+interface for use in development and production environments.
+
+It provides logging levels that provide decreased output based upon the
+desired amount of output, unlike the standard library `log` package.
+
+It does not provide `Printf` style logging, only key/value logging that is
+exposed as arguments to the logging functions for simplicity.
+
+It provides a human readable output mode for use in development as well as
+JSON output mode for production.
+
+## Stability Note
+
+While this library is fully open source and HashiCorp will be maintaining it
+(since we are and will be making extensive use of it), the API and output
+format is subject to minor changes as we fully bake and vet it in our projects.
+This notice will be removed once it's fully integrated into our major projects
+and no further changes are anticipated.
+
+## Installation and Docs
+
+Install using `go get github.com/hashicorp/go-hclog`.
+
+Full documentation is available at
+http://godoc.org/github.com/hashicorp/go-hclog
+
+## Usage
+
+### Use the global logger
+
+```go
+hclog.Default().Info("hello world")
+```
+
+```text
+2017-07-05T16:15:55.167-0700 [INFO ] hello world
+```
+
+(Note timestamps are removed in future examples for brevity.)
+
+### Create a new logger
+
+```go
+appLogger := hclog.New(&hclog.LoggerOptions{
+	Name:  "my-app",
+	Level: hclog.LevelFromString("DEBUG"),
+})
+```
+
+### Emit an Info level message with 2 key/value pairs
+
+```go
+input := "5.5"
+_, err := strconv.ParseInt(input, 10, 32)
+if err != nil {
+	appLogger.Info("Invalid input for ParseInt", "input", input, "error", err)
+}
+```
+
+```text
+... [INFO ] my-app: Invalid input for ParseInt: input=5.5 error="strconv.ParseInt: parsing "5.5": invalid syntax"
+```
+
+### Create a new Logger for a major subsystem
+
+```go
+subsystemLogger := appLogger.Named("transport")
+subsystemLogger.Info("we are transporting something")
+```
+
+```text
+... [INFO ] my-app.transport: we are transporting something
+```
+
+Notice that logs emitted by `subsystemLogger` contain `my-app.transport`,
+reflecting both the application and subsystem names.
+
+### Create a new Logger with fixed key/value pairs
+
+Using `With()` will include a specific key-value pair in all messages emitted
+by that logger.
+
+```go
+requestID := "5fb446b6-6eba-821d-df1b-cd7501b6a363"
+requestLogger := subsystemLogger.With("request", requestID)
+requestLogger.Info("we are transporting a request")
+```
+
+```text
+... [INFO ] my-app.transport: we are transporting a request: request=5fb446b6-6eba-821d-df1b-cd7501b6a363
+```
+
+This allows sub Loggers to be context specific without having to thread that
+into all the callers.
+
+### Use this with code that uses the standard library logger
+
+If you want to use the standard library's `log.Logger` interface you can wrap
+`hclog.Logger` by calling the `StandardLogger()` method. This allows you to use
+it with the familiar `Println()`, `Printf()`, etc. For example:
+
+```go
+stdLogger := appLogger.StandardLogger(&hclog.StandardLoggerOptions{
+	InferLevels: true,
+})
+// Printf() is provided by stdlib log.Logger interface, not hclog.Logger
+stdLogger.Printf("[DEBUG] %+v", stdLogger)
+```
+
+```text
+... [DEBUG] my-app: &{mu:{state:0 sema:0} prefix: flag:0 out:0xc42000a0a0 buf:[]}
+```
+
+Notice that if `appLogger` is initialized with the `INFO` log level _and_ you
+specify `InferLevels: true`, you will not see any output here. You must change
+`appLogger` to `DEBUG` to see output. See the docs for more information.

vendor/github.com/hashicorp/go-hclog/global.go

@@ -0,0 +1,34 @@
+package hclog
+
+import (
+	"sync"
+)
+
+var (
+	protect sync.Once
+	def     Logger
+
+	// The options used to create the Default logger. These are
+	// read only when the Default logger is created, so set them
+	// as soon as the process starts.
+	DefaultOptions = &LoggerOptions{
+		Level:  DefaultLevel,
+		Output: DefaultOutput,
+	}
+)
+
+// Return a logger that is held globally. This can be a good starting
+// place, and then you can use .With() and .Name() to create sub-loggers
+// to be used in more specific contexts.
+func Default() Logger {
+	protect.Do(func() {
+		def = New(DefaultOptions)
+	})
+
+	return def
+}
+
+// A short alias for Default()
+func L() Logger {
+	return Default()
+}

vendor/github.com/hashicorp/go-hclog/int.go

@@ -0,0 +1,404 @@
+package hclog
+
+import (
+	"bufio"
+	"encoding"
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	_levelToBracket = map[Level]string{
+		Debug: "[DEBUG]",
+		Trace: "[TRACE]",
+		Info:  "[INFO ]",
+		Warn:  "[WARN ]",
+		Error: "[ERROR]",
+	}
+)
+
+// Given the options (nil for defaults), create a new Logger
+func New(opts *LoggerOptions) Logger {
+	if opts == nil {
+		opts = &LoggerOptions{}
+	}
+
+	output := opts.Output
+	if output == nil {
+		output = os.Stderr
+	}
+
+	level := opts.Level
+	if level == NoLevel {
+		level = DefaultLevel
+	}
+
+	mtx := opts.Mutex
+	if mtx == nil {
+		mtx = new(sync.Mutex)
+	}
+
+	return &intLogger{
+		m:      mtx,
+		json:   opts.JSONFormat,
+		caller: opts.IncludeLocation,
+		name:   opts.Name,
+		w:      bufio.NewWriter(output),
+		level:  level,
+	}
+}
+
+// The internal logger implementation. Internal in that it is defined entirely
+// by this package.
+type intLogger struct {
+	json   bool
+	caller bool
+	name   string
+
+	// this is a pointer so that it's shared by any derived loggers, since
+	// those derived loggers share the bufio.Writer as well.
+	m     *sync.Mutex
+	w     *bufio.Writer
+	level Level
+
+	implied []interface{}
+}
+
+// Make sure that intLogger is a Logger
+var _ Logger = &intLogger{}
+
+// The time format to use for logging. This is a version of RFC3339 that
+// contains millisecond precision
+const TimeFormat = "2006-01-02T15:04:05.000Z0700"
+
+// Log a message and a set of key/value pairs if the given level is at
+// or more severe that the threshold configured in the Logger.
+func (z *intLogger) Log(level Level, msg string, args ...interface{}) {
+	if level < z.level {
+		return
+	}
+
+	t := time.Now()
+
+	z.m.Lock()
+	defer z.m.Unlock()
+
+	if z.json {
+		z.logJson(t, level, msg, args...)
+	} else {
+		z.log(t, level, msg, args...)
+	}
+
+	z.w.Flush()
+}
+
+// Cleanup a path by returning the last 2 segments of the path only.
+func trimCallerPath(path string) string {
+	// lovely borrowed from zap
+	// nb. To make sure we trim the path correctly on Windows too, we
+	// counter-intuitively need to use '/' and *not* os.PathSeparator here,
+	// because the path given originates from Go stdlib, specifically
+	// runtime.Caller() which (as of Mar/17) returns forward slashes even on
+	// Windows.
+	//
+	// See https://github.com/golang/go/issues/3335
+	// and https://github.com/golang/go/issues/18151
+	//
+	// for discussion on the issue on Go side.
+	//
+
+	// Find the last separator.
+	//
+	idx := strings.LastIndexByte(path, '/')
+	if idx == -1 {
+		return path
+	}
+
+	// Find the penultimate separator.
+	idx = strings.LastIndexByte(path[:idx], '/')
+	if idx == -1 {
+		return path
+	}
+
+	return path[idx+1:]
+}
+
+// Non-JSON logging format function
+func (z *intLogger) log(t time.Time, level Level, msg string, args ...interface{}) {
+	z.w.WriteString(t.Format(TimeFormat))
+	z.w.WriteByte(' ')
+
+	s, ok := _levelToBracket[level]
+	if ok {
+		z.w.WriteString(s)
+	} else {
+		z.w.WriteString("[UNKN ]")
+	}
+
+	if z.caller {
+		if _, file, line, ok := runtime.Caller(3); ok {
+			z.w.WriteByte(' ')
+			z.w.WriteString(trimCallerPath(file))
+			z.w.WriteByte(':')
+			z.w.WriteString(strconv.Itoa(line))
+			z.w.WriteByte(':')
+		}
+	}
+
+	z.w.WriteByte(' ')
+
+	if z.name != "" {
+		z.w.WriteString(z.name)
+		z.w.WriteString(": ")
+	}
+
+	z.w.WriteString(msg)
+
+	args = append(z.implied, args...)
+
+	var stacktrace CapturedStacktrace
+
+	if args != nil && len(args) > 0 {
+		if len(args)%2 != 0 {
+			cs, ok := args[len(args)-1].(CapturedStacktrace)
+			if ok {
+				args = args[:len(args)-1]
+				stacktrace = cs
+			} else {
+				args = append(args, "<unknown>")
+			}
+		}
+
+		z.w.WriteByte(':')
+
+	FOR:
+		for i := 0; i < len(args); i = i + 2 {
+			var val string
+
+			switch st := args[i+1].(type) {
+			case string:
+				val = st
+			case int:
+				val = strconv.FormatInt(int64(st), 10)
+			case int64:
+				val = strconv.FormatInt(int64(st), 10)
+			case int32:
+				val = strconv.FormatInt(int64(st), 10)
+			case int16:
+				val = strconv.FormatInt(int64(st), 10)
+			case int8:
+				val = strconv.FormatInt(int64(st), 10)
+			case uint:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint64:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint32:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint16:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint8:
+				val = strconv.FormatUint(uint64(st), 10)
+			case CapturedStacktrace:
+				stacktrace = st
+				continue FOR
+			default:
+				val = fmt.Sprintf("%v", st)
+			}
+
+			z.w.WriteByte(' ')
+			z.w.WriteString(args[i].(string))
+			z.w.WriteByte('=')
+
+			if strings.ContainsAny(val, " \t\n\r") {
+				z.w.WriteByte('"')
+				z.w.WriteString(val)
+				z.w.WriteByte('"')
+			} else {
+				z.w.WriteString(val)
+			}
+		}
+	}
+
+	z.w.WriteString("\n")
+
+	if stacktrace != "" {
+		z.w.WriteString(string(stacktrace))
+	}
+}
+
+// JSON logging function
+func (z *intLogger) logJson(t time.Time, level Level, msg string, args ...interface{}) {
+	vals := map[string]interface{}{
+		"@message":   msg,
+		"@timestamp": t.Format("2006-01-02T15:04:05.000000Z07:00"),
+	}
+
+	var levelStr string
+	switch level {
+	case Error:
+		levelStr = "error"
+	case Warn:
+		levelStr = "warn"
+	case Info:
+		levelStr = "info"
+	case Debug:
+		levelStr = "debug"
+	case Trace:
+		levelStr = "trace"
+	default:
+		levelStr = "all"
+	}
+
+	vals["@level"] = levelStr
+
+	if z.name != "" {
+		vals["@module"] = z.name
+	}
+
+	if z.caller {
+		if _, file, line, ok := runtime.Caller(3); ok {
+			vals["@caller"] = fmt.Sprintf("%s:%d", file, line)
+		}
+	}
+
+	if args != nil && len(args) > 0 {
+		if len(args)%2 != 0 {
+			cs, ok := args[len(args)-1].(CapturedStacktrace)
+			if ok {
+				args = args[:len(args)-1]
+				vals["stacktrace"] = cs
+			} else {
+				args = append(args, "<unknown>")
+			}
+		}
+
+		for i := 0; i < len(args); i = i + 2 {
+			if _, ok := args[i].(string); !ok {
+				// As this is the logging function not much we can do here
+				// without injecting into logs...
+				continue
+			}
+			val := args[i+1]
+			// Check if val is of type error. If error type doesn't
+			// implement json.Marshaler or encoding.TextMarshaler
+			// then set val to err.Error() so that it gets marshaled
+			if err, ok := val.(error); ok {
+				switch err.(type) {
+				case json.Marshaler, encoding.TextMarshaler:
+				default:
+					val = err.Error()
+				}
+			}
+			vals[args[i].(string)] = val
+		}
+	}
+
+	err := json.NewEncoder(z.w).Encode(vals)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// Emit the message and args at DEBUG level
+func (z *intLogger) Debug(msg string, args ...interface{}) {
+	z.Log(Debug, msg, args...)
+}
+
+// Emit the message and args at TRACE level
+func (z *intLogger) Trace(msg string, args ...interface{}) {
+	z.Log(Trace, msg, args...)
+}
+
+// Emit the message and args at INFO level
+func (z *intLogger) Info(msg string, args ...interface{}) {
+	z.Log(Info, msg, args...)
+}
+
+// Emit the message and args at WARN level
+func (z *intLogger) Warn(msg string, args ...interface{}) {
+	z.Log(Warn, msg, args...)
+}
+
+// Emit the message and args at ERROR level
+func (z *intLogger) Error(msg string, args ...interface{}) {
+	z.Log(Error, msg, args...)
+}
+
+// Indicate that the logger would emit TRACE level logs
+func (z *intLogger) IsTrace() bool {
+	return z.level == Trace
+}
+
+// Indicate that the logger would emit DEBUG level logs
+func (z *intLogger) IsDebug() bool {
+	return z.level <= Debug
+}
+
+// Indicate that the logger would emit INFO level logs
+func (z *intLogger) IsInfo() bool {
+	return z.level <= Info
+}
+
+// Indicate that the logger would emit WARN level logs
+func (z *intLogger) IsWarn() bool {
+	return z.level <= Warn
+}
+
+// Indicate that the logger would emit ERROR level logs
+func (z *intLogger) IsError() bool {
+	return z.level <= Error
+}
+
+// Return a sub-Logger for which every emitted log message will contain
+// the given key/value pairs. This is used to create a context specific
+// Logger.
+func (z *intLogger) With(args ...interface{}) Logger {
+	var nz intLogger = *z
+
+	nz.implied = append(nz.implied, args...)
+
+	return &nz
+}
+
+// Create a new sub-Logger that a name decending from the current name.
+// This is used to create a subsystem specific Logger.
+func (z *intLogger) Named(name string) Logger {
+	var nz intLogger = *z
+
+	if nz.name != "" {
+		nz.name = nz.name + "." + name
+	} else {
+		nz.name = name
+	}
+
+	return &nz
+}
+
+// Create a new sub-Logger with an explicit name. This ignores the current
+// name. This is used to create a standalone logger that doesn't fall
+// within the normal hierarchy.
+func (z *intLogger) ResetNamed(name string) Logger {
+	var nz intLogger = *z
+
+	nz.name = name
+
+	return &nz
+}
+
+// Create a *log.Logger that will send it's data through this Logger. This
+// allows packages that expect to be using the standard library log to actually
+// use this logger.
+func (z *intLogger) StandardLogger(opts *StandardLoggerOptions) *log.Logger {
+	if opts == nil {
+		opts = &StandardLoggerOptions{}
+	}
+
+	return log.New(&stdlogAdapter{z, opts.InferLevels}, "", 0)
+}

vendor/github.com/hashicorp/go-hclog/log.go

@@ -0,0 +1,142 @@
+package hclog
+
+import (
+	"io"
+	"log"
+	"os"
+	"strings"
+	"sync"
+)
+
+var (
+	DefaultOutput = os.Stderr
+	DefaultLevel  = Info
+)
+
+type Level int
+
+const (
+	// This is a special level used to indicate that no level has been
+	// set and allow for a default to be used.
+	NoLevel Level = 0
+
+	// The most verbose level. Intended to be used for the tracing of actions
+	// in code, such as function enters/exits, etc.
+	Trace Level = 1
+
+	// For programmer lowlevel analysis.
+	Debug Level = 2
+
+	// For information about steady state operations.
+	Info Level = 3
+
+	// For information about rare but handled events.
+	Warn Level = 4
+
+	// For information about unrecoverable events.
+	Error Level = 5
+)
+
+// LevelFromString returns a Level type for the named log level, or "NoLevel" if
+// the level string is invalid. This facilitates setting the log level via
+// config or environment variable by name in a predictable way.
+func LevelFromString(levelStr string) Level {
+	// We don't care about case. Accept "INFO" or "info"
+	levelStr = strings.ToLower(strings.TrimSpace(levelStr))
+	switch levelStr {
+	case "trace":
+		return Trace
+	case "debug":
+		return Debug
+	case "info":
+		return Info
+	case "warn":
+		return Warn
+	case "error":
+		return Error
+	default:
+		return NoLevel
+	}
+}
+
+// The main Logger interface. All code should code against this interface only.
+type Logger interface {
+	// Args are alternating key, val pairs
+	// keys must be strings
+	// vals can be any type, but display is implementation specific
+	// Emit a message and key/value pairs at the TRACE level
+	Trace(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the DEBUG level
+	Debug(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the INFO level
+	Info(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the WARN level
+	Warn(msg string, args ...interface{})
+
+	// Emit a message and key/value pairs at the ERROR level
+	Error(msg string, args ...interface{})
+
+	// Indicate if TRACE logs would be emitted. This and the other Is* guards
+	// are used to elide expensive logging code based on the current level.
+	IsTrace() bool
+
+	// Indicate if DEBUG logs would be emitted. This and the other Is* guards
+	IsDebug() bool
+
+	// Indicate if INFO logs would be emitted. This and the other Is* guards
+	IsInfo() bool
+
+	// Indicate if WARN logs would be emitted. This and the other Is* guards
+	IsWarn() bool
+
+	// Indicate if ERROR logs would be emitted. This and the other Is* guards
+	IsError() bool
+
+	// Creates a sublogger that will always have the given key/value pairs
+	With(args ...interface{}) Logger
+
+	// Create a logger that will prepend the name string on the front of all messages.
+	// If the logger already has a name, the new value will be appended to the current
+	// name. That way, a major subsystem can use this to decorate all it's own logs
+	// without losing context.
+	Named(name string) Logger
+
+	// Create a logger that will prepend the name string on the front of all messages.
+	// This sets the name of the logger to the value directly, unlike Named which honor
+	// the current name as well.
+	ResetNamed(name string) Logger
+
+	// Return a value that conforms to the stdlib log.Logger interface
+	StandardLogger(opts *StandardLoggerOptions) *log.Logger
+}
+
+type StandardLoggerOptions struct {
+	// Indicate that some minimal parsing should be done on strings to try
+	// and detect their level and re-emit them.
+	// This supports the strings like [ERROR], [ERR] [TRACE], [WARN], [INFO],
+	// [DEBUG] and strip it off before reapplying it.
+	InferLevels bool
+}
+
+type LoggerOptions struct {
+	// Name of the subsystem to prefix logs with
+	Name string
+
+	// The threshold for the logger. Anything less severe is supressed
+	Level Level
+
+	// Where to write the logs to. Defaults to os.Stdout if nil
+	Output io.Writer
+
+	// An optional mutex pointer in case Output is shared
+	Mutex *sync.Mutex
+
+	// Control if the output should be in JSON.
+	JSONFormat bool
+
+	// Include file and line information in each log line
+	IncludeLocation bool
+}

vendor/github.com/hashicorp/go-hclog/stacktrace.go

@@ -0,0 +1,108 @@
+// Copyright (c) 2016 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package hclog
+
+import (
+	"bytes"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+)
+
+var (
+	_stacktraceIgnorePrefixes = []string{
+		"runtime.goexit",
+		"runtime.main",
+	}
+	_stacktracePool = sync.Pool{
+		New: func() interface{} {
+			return newProgramCounters(64)
+		},
+	}
+)
+
+// A stacktrace gathered by a previous call to log.Stacktrace. If passed
+// to a logging function, the stacktrace will be appended.
+type CapturedStacktrace string
+
+// Gather a stacktrace of the current goroutine and return it to be passed
+// to a logging function.
+func Stacktrace() CapturedStacktrace {
+	return CapturedStacktrace(takeStacktrace())
+}
+
+func takeStacktrace() string {
+	programCounters := _stacktracePool.Get().(*programCounters)
+	defer _stacktracePool.Put(programCounters)
+
+	var buffer bytes.Buffer
+
+	for {
+		// Skip the call to runtime.Counters and takeStacktrace so that the
+		// program counters start at the caller of takeStacktrace.
+		n := runtime.Callers(2, programCounters.pcs)
+		if n < cap(programCounters.pcs) {
+			programCounters.pcs = programCounters.pcs[:n]
+			break
+		}
+		// Don't put the too-short counter slice back into the pool; this lets
+		// the pool adjust if we consistently take deep stacktraces.
+		programCounters = newProgramCounters(len(programCounters.pcs) * 2)
+	}
+
+	i := 0
+	frames := runtime.CallersFrames(programCounters.pcs)
+	for frame, more := frames.Next(); more; frame, more = frames.Next() {
+		if shouldIgnoreStacktraceFunction(frame.Function) {
+			continue
+		}
+		if i != 0 {
+			buffer.WriteByte('\n')
+		}
+		i++
+		buffer.WriteString(frame.Function)
+		buffer.WriteByte('\n')
+		buffer.WriteByte('\t')
+		buffer.WriteString(frame.File)
+		buffer.WriteByte(':')
+		buffer.WriteString(strconv.Itoa(int(frame.Line)))
+	}
+
+	return buffer.String()
+}
+
+func shouldIgnoreStacktraceFunction(function string) bool {
+	for _, prefix := range _stacktraceIgnorePrefixes {
+		if strings.HasPrefix(function, prefix) {
+			return true
+		}
+	}
+	return false
+}
+
+type programCounters struct {
+	pcs []uintptr
+}
+
+func newProgramCounters(size int) *programCounters {
+	return &programCounters{make([]uintptr, size)}
+}

vendor/github.com/hashicorp/go-hclog/stdlog.go

@@ -0,0 +1,62 @@
+package hclog
+
+import (
+	"bytes"
+	"strings"
+)
+
+// Provides a io.Writer to shim the data out of *log.Logger
+// and back into our Logger. This is basically the only way to
+// build upon *log.Logger.
+type stdlogAdapter struct {
+	hl          Logger
+	inferLevels bool
+}
+
+// Take the data, infer the levels if configured, and send it through
+// a regular Logger
+func (s *stdlogAdapter) Write(data []byte) (int, error) {
+	str := string(bytes.TrimRight(data, " \t\n"))
+
+	if s.inferLevels {
+		level, str := s.pickLevel(str)
+		switch level {
+		case Trace:
+			s.hl.Trace(str)
+		case Debug:
+			s.hl.Debug(str)
+		case Info:
+			s.hl.Info(str)
+		case Warn:
+			s.hl.Warn(str)
+		case Error:
+			s.hl.Error(str)
+		default:
+			s.hl.Info(str)
+		}
+	} else {
+		s.hl.Info(str)
+	}
+
+	return len(data), nil
+}
+
+// Detect, based on conventions, what log level this is
+func (s *stdlogAdapter) pickLevel(str string) (Level, string) {
+	switch {
+	case strings.HasPrefix(str, "[DEBUG]"):
+		return Debug, strings.TrimSpace(str[7:])
+	case strings.HasPrefix(str, "[TRACE]"):
+		return Trace, strings.TrimSpace(str[7:])
+	case strings.HasPrefix(str, "[INFO]"):
+		return Info, strings.TrimSpace(str[6:])
+	case strings.HasPrefix(str, "[WARN]"):
+		return Warn, strings.TrimSpace(str[7:])
+	case strings.HasPrefix(str, "[ERROR]"):
+		return Error, strings.TrimSpace(str[7:])
+	case strings.HasPrefix(str, "[ERR]"):
+		return Error, strings.TrimSpace(str[5:])
+	default:
+		return Info, str
+	}
+}

vendor/github.com/hashicorp/go-plugin/README.md

@@ -1,10 +1,9 @@
 # Go Plugin System over RPC
 
 `go-plugin` is a Go (golang) plugin system over RPC. It is the plugin system
-that has been in use by HashiCorp tooling for over 3 years. While initially
+that has been in use by HashiCorp tooling for over 4 years. While initially
-created for [Packer](https://www.packer.io), it has since been used by
+created for [Packer](https://www.packer.io), it is additionally in use by
-[Terraform](https://www.terraform.io) and [Otto](https://www.ottoproject.io),
+[Terraform](https://www.terraform.io), [Nomad](https://www.nomadproject.io), and
-with plans to also use it for [Nomad](https://www.nomadproject.io) and
 [Vault](https://www.vaultproject.io).
 
 While the plugin system is over RPC, it is currently only designed to work
@@ -24,6 +23,11 @@ interface as if it were going to run in the same process. For a plugin user:
 you just use and call functions on an interface as if it were in the same
 process. This plugin system handles the communication in between.
 
+**Cross-language support.** Plugins can be written (and consumed) by
+almost every major language. This library supports serving plugins via
+[gRPC](http://www.grpc.io). gRPC-based plugins enable plugins to be written
+in any language.
+
 **Complex arguments and return values are supported.** This library
 provides APIs for handling complex arguments and return values such
 as interfaces, `io.Reader/Writer`, etc. We do this by giving you a library
@@ -37,7 +41,10 @@ and the plugin can call back into the host process.
 **Built-in Logging.** Any plugins that use the `log` standard library
 will have log data automatically sent to the host process. The host
 process will mirror this output prefixed with the path to the plugin
-binary. This makes debugging with plugins simple.
+binary. This makes debugging with plugins simple. If the host system
+uses [hclog](https://github.com/hashicorp/go-hclog) then the log data
+will be structured. If the plugin also uses hclog, logs from the plugin
+will be sent to the host hclog and be structured.
 
 **Protocol Versioning.** A very basic "protocol version" is supported that
 can be incremented to invalidate any previous plugins. This is useful when
@@ -62,13 +69,18 @@ This requires the host/plugin to know this is possible and daemonize
 properly. `NewClient` takes a `ReattachConfig` to determine if and how to
 reattach.
 
+**Cryptographically Secure Plugins.** Plugins can be verified with an expected
+checksum and RPC communications can be configured to use TLS. The host process
+must be properly secured to protect this configuration.
+
 ## Architecture
 
 The HashiCorp plugin system works by launching subprocesses and communicating
-over RPC (using standard `net/rpc`). A single connection is made between
+over RPC (using standard `net/rpc` or [gRPC](http://www.grpc.io)). A single
-any plugin and the host process, and we use a
+connection is made between any plugin and the host process. For net/rpc-based
-[connection multiplexing](https://github.com/hashicorp/yamux)
+plugins, we use a [connection multiplexing](https://github.com/hashicorp/yamux)
-library to multiplex any other connections on top.
+library to multiplex any other connections on top. For gRPC-based plugins,
+the HTTP2 protocol handles multiplexing.
 
 This architecture has a number of benefits:
 
@@ -76,8 +88,8 @@ This architecture has a number of benefits:
     panic the plugin user.
 
   * Plugins are very easy to write: just write a Go application and `go build`.
-    Theoretically you could also use another language as long as it can
+    Or use any other language to write a gRPC server with a tiny amount of
-    communicate the Go `net/rpc` protocol but this hasn't yet been tried.
+    boilerplate to support go-plugin.
 
   * Plugins are very easy to install: just put the binary in a location where
     the host will find it (depends on the host but this library also provides
@@ -85,8 +97,8 @@ This architecture has a number of benefits:
 
   * Plugins can be relatively secure: The plugin only has access to the
     interfaces and args given to it, not to the entire memory space of the
-    process. More security features are planned (see the coming soon section
+    process. Additionally, go-plugin can communicate with the plugin over
-    below).
+    TLS.
 
 ## Usage
 
@@ -97,10 +109,9 @@ high-level steps that must be done. Examples are available in the
   1. Choose the interface(s) you want to expose for plugins.
 
   2. For each interface, implement an implementation of that interface
-     that communicates over an `*rpc.Client` (from the standard `net/rpc`
+     that communicates over a `net/rpc` connection or other a
-     package) for every function call. Likewise, implement the RPC server
+     [gRPC](http://www.grpc.io) connection or both. You'll have to implement
-     struct this communicates to which is then communicating to a real,
+     both a client and server implementation.
-     concrete implementation.
 
   3. Create a `Plugin` implementation that knows how to create the RPC
      client/server for a given plugin type.
@@ -125,10 +136,6 @@ improvements we can make.
 
 At this point in time, the roadmap for the plugin system is:
 
-**Cryptographically Secure Plugins.** We'll implement signing plugins
-and loading signed plugins in order to allow Vault to make use of multi-process
-in a secure way.
-
 **Semantic Versioning.** Plugins will be able to implement a semantic version.
 This plugin system will give host processes a system for constraining
 versions. This is in addition to the protocol versioning already present

vendor/github.com/hashicorp/go-plugin/client.go

@@ -2,8 +2,11 @@ package plugin
 
 import (
 	"bufio"
+	"crypto/subtle"
+	"crypto/tls"
 	"errors"
 	"fmt"
+	"hash"
 	"io"
 	"io/ioutil"
 	"log"
@@ -17,6 +20,8 @@ import (
 	"sync/atomic"
 	"time"
 	"unicode"
+
+	hclog "github.com/hashicorp/go-hclog"
 )
 
 // If this is 1, then we've called CleanupClients. This can be used
@@ -35,6 +40,22 @@ var (
 	// ErrProcessNotFound is returned when a client is instantiated to
 	// reattach to an existing process and it isn't found.
 	ErrProcessNotFound = errors.New("Reattachment process not found")
+
+	// ErrChecksumsDoNotMatch is returned when binary's checksum doesn't match
+	// the one provided in the SecureConfig.
+	ErrChecksumsDoNotMatch = errors.New("checksums did not match")
+
+	// ErrSecureNoChecksum is returned when an empty checksum is provided to the
+	// SecureConfig.
+	ErrSecureConfigNoChecksum = errors.New("no checksum provided")
+
+	// ErrSecureNoHash is returned when a nil Hash object is provided to the
+	// SecureConfig.
+	ErrSecureConfigNoHash = errors.New("no hash implementation provided")
+
+	// ErrSecureConfigAndReattach is returned when both Reattach and
+	// SecureConfig are set.
+	ErrSecureConfigAndReattach = errors.New("only one of Reattach or SecureConfig can be set")
 )
 
 // Client handles the lifecycle of a plugin application. It launches
@@ -55,7 +76,9 @@ type Client struct {
 	l           sync.Mutex
 	address     net.Addr
 	process     *os.Process
-	client      *RPCClient
+	client      ClientProtocol
+	protocol    Protocol
+	logger      hclog.Logger
 }
 
 // ClientConfig is the configuration used to initialize a new
@@ -79,6 +102,13 @@ type ClientConfig struct {
 	Cmd      *exec.Cmd
 	Reattach *ReattachConfig
 
+	// SecureConfig is configuration for verifying the integrity of the
+	// executable. It can not be used with Reattach.
+	SecureConfig *SecureConfig
+
+	// TLSConfig is used to enable TLS on the RPC client.
+	TLSConfig *tls.Config
+
 	// Managed represents if the client should be managed by the
 	// plugin package or not. If true, then by calling CleanupClients,
 	// it will automatically be cleaned up. Otherwise, the client
@@ -109,14 +139,74 @@ type ClientConfig struct {
 	// sync any of these streams.
 	SyncStdout io.Writer
 	SyncStderr io.Writer
+
+	// AllowedProtocols is a list of allowed protocols. If this isn't set,
+	// then only netrpc is allowed. This is so that older go-plugin systems
+	// can show friendly errors if they see a plugin with an unknown
+	// protocol.
+	//
+	// By setting this, you can cause an error immediately on plugin start
+	// if an unsupported protocol is used with a good error message.
+	//
+	// If this isn't set at all (nil value), then only net/rpc is accepted.
+	// This is done for legacy reasons. You must explicitly opt-in to
+	// new protocols.
+	AllowedProtocols []Protocol
+
+	// Logger is the logger that the client will used. If none is provided,
+	// it will default to hclog's default logger.
+	Logger hclog.Logger
 }
 
 // ReattachConfig is used to configure a client to reattach to an
 // already-running plugin process. You can retrieve this information by
 // calling ReattachConfig on Client.
 type ReattachConfig struct {
-	Addr net.Addr
+	Protocol Protocol
-	Pid  int
+	Addr     net.Addr
+	Pid      int
+}
+
+// SecureConfig is used to configure a client to verify the integrity of an
+// executable before running. It does this by verifying the checksum is
+// expected. Hash is used to specify the hashing method to use when checksumming
+// the file.  The configuration is verified by the client by calling the
+// SecureConfig.Check() function.
+//
+// The host process should ensure the checksum was provided by a trusted and
+// authoritative source. The binary should be installed in such a way that it
+// can not be modified by an unauthorized user between the time of this check
+// and the time of execution.
+type SecureConfig struct {
+	Checksum []byte
+	Hash     hash.Hash
+}
+
+// Check takes the filepath to an executable and returns true if the checksum of
+// the file matches the checksum provided in the SecureConfig.
+func (s *SecureConfig) Check(filePath string) (bool, error) {
+	if len(s.Checksum) == 0 {
+		return false, ErrSecureConfigNoChecksum
+	}
+
+	if s.Hash == nil {
+		return false, ErrSecureConfigNoHash
+	}
+
+	file, err := os.Open(filePath)
+	if err != nil {
+		return false, err
+	}
+	defer file.Close()
+
+	_, err = io.Copy(s.Hash, file)
+	if err != nil {
+		return false, err
+	}
+
+	sum := s.Hash.Sum(nil)
+
+	return subtle.ConstantTimeCompare(sum, s.Checksum) == 1, nil
 }
 
 // This makes sure all the managed subprocesses are killed and properly
@@ -174,7 +264,22 @@ func NewClient(config *ClientConfig) (c *Client) {
 		config.SyncStderr = ioutil.Discard
 	}
 
-	c = &Client{config: config}
+	if config.AllowedProtocols == nil {
+		config.AllowedProtocols = []Protocol{ProtocolNetRPC}
+	}
+
+	if config.Logger == nil {
+		config.Logger = hclog.New(&hclog.LoggerOptions{
+			Output: hclog.DefaultOutput,
+			Level:  hclog.Trace,
+			Name:   "plugin",
+		})
+	}
+
+	c = &Client{
+		config: config,
+		logger: config.Logger,
+	}
 	if config.Managed {
 		managedClientsLock.Lock()
 		managedClients = append(managedClients, c)
@@ -184,11 +289,11 @@ func NewClient(config *ClientConfig) (c *Client) {
 	return
 }
 
-// Client returns an RPC client for the plugin.
+// Client returns the protocol client for this connection.
 //
-// Subsequent calls to this will return the same RPC client.
+// Subsequent calls to this will return the same client.
-func (c *Client) Client() (*RPCClient, error) {
+func (c *Client) Client() (ClientProtocol, error) {
-	addr, err := c.Start()
+	_, err := c.Start()
 	if err != nil {
 		return nil, err
 	}
@@ -200,29 +305,18 @@ func (c *Client) Client() (*RPCClient, error) {
 		return c.client, nil
 	}
 
-	// Connect to the client
+	switch c.protocol {
-	conn, err := net.Dial(addr.Network(), addr.String())
+	case ProtocolNetRPC:
-	if err != nil {
+		c.client, err = newRPCClient(c)
-		return nil, err
+
-	}
+	case ProtocolGRPC:
-	if tcpConn, ok := conn.(*net.TCPConn); ok {
+		c.client, err = newGRPCClient(c)
-		// Make sure to set keep alive so that the connection doesn't die
+
-		tcpConn.SetKeepAlive(true)
+	default:
+		return nil, fmt.Errorf("unknown server protocol: %s", c.protocol)
 	}
 
-	// Create the actual RPC client
-	c.client, err = NewRPCClient(conn, c.config.Plugins)
 	if err != nil {
-		conn.Close()
-		return nil, err
-	}
-
-	// Begin the stream syncing so that stdin, out, err work properly
-	err = c.client.SyncStreams(
-		c.config.SyncStdout,
-		c.config.SyncStderr)
-	if err != nil {
-		c.client.Close()
 		c.client = nil
 		return nil, err
 	}
@@ -274,8 +368,7 @@ func (c *Client) Kill() {
 			if err != nil {
 				// If there was an error just log it. We're going to force
 				// kill in a moment anyways.
-				log.Printf(
+				c.logger.Warn("error closing client during Kill", "err", err)
-					"[WARN] plugin: error closing client during Kill: %s", err)
 			}
 		}
 	}
@@ -318,9 +411,14 @@ func (c *Client) Start() (addr net.Addr, err error) {
 	{
 		cmdSet := c.config.Cmd != nil
 		attachSet := c.config.Reattach != nil
+		secureSet := c.config.SecureConfig != nil
 		if cmdSet == attachSet {
 			return nil, fmt.Errorf("Only one of Cmd or Reattach must be set")
 		}
+
+		if secureSet && attachSet {
+			return nil, ErrSecureConfigAndReattach
+		}
 	}
 
 	// Create the logging channel for when we kill
@@ -350,7 +448,7 @@ func (c *Client) Start() (addr net.Addr, err error) {
 			pidWait(pid)
 
 			// Log so we can see it
-			log.Printf("[DEBUG] plugin: reattached plugin process exited\n")
+			c.logger.Debug("reattached plugin process exited")
 
 			// Mark it
 			c.l.Lock()
@@ -364,6 +462,11 @@ func (c *Client) Start() (addr net.Addr, err error) {
 		// Set the address and process
 		c.address = c.config.Reattach.Addr
 		c.process = p
+		c.protocol = c.config.Reattach.Protocol
+		if c.protocol == "" {
+			// Default the protocol to net/rpc for backwards compatibility
+			c.protocol = ProtocolNetRPC
+		}
 
 		return c.address, nil
 	}
@@ -384,7 +487,15 @@ func (c *Client) Start() (addr net.Addr, err error) {
 	cmd.Stderr = stderr_w
 	cmd.Stdout = stdout_w
 
-	log.Printf("[DEBUG] plugin: starting plugin: %s %#v", cmd.Path, cmd.Args)
+	if c.config.SecureConfig != nil {
+		if ok, err := c.config.SecureConfig.Check(cmd.Path); err != nil {
+			return nil, fmt.Errorf("error verifying checksum: %s", err)
+		} else if !ok {
+			return nil, ErrChecksumsDoNotMatch
+		}
+	}
+
+	c.logger.Debug("starting plugin", "path", cmd.Path, "args", cmd.Args)
 	err = cmd.Start()
 	if err != nil {
 		return
@@ -418,7 +529,7 @@ func (c *Client) Start() (addr net.Addr, err error) {
 		cmd.Wait()
 
 		// Log and make sure to flush the logs write away
-		log.Printf("[DEBUG] plugin: %s: plugin process exited\n", cmd.Path)
+		c.logger.Debug("plugin process exited", "path", cmd.Path)
 		os.Stderr.Sync()
 
 		// Mark that we exited
@@ -465,7 +576,7 @@ func (c *Client) Start() (addr net.Addr, err error) {
 	timeout := time.After(c.config.StartTimeout)
 
 	// Start looking for the address
-	log.Printf("[DEBUG] plugin: waiting for RPC address for: %s", cmd.Path)
+	c.logger.Debug("waiting for RPC address", "path", cmd.Path)
 	select {
 	case <-timeout:
 		err = errors.New("timeout while waiting for plugin to start")
@@ -475,7 +586,7 @@ func (c *Client) Start() (addr net.Addr, err error) {
 		// Trim the line and split by "|" in order to get the parts of
 		// the output.
 		line := strings.TrimSpace(string(lineBytes))
-		parts := strings.SplitN(line, "|", 4)
+		parts := strings.SplitN(line, "|", 6)
 		if len(parts) < 4 {
 			err = fmt.Errorf(
 				"Unrecognized remote plugin message: %s\n\n"+
@@ -495,7 +606,7 @@ func (c *Client) Start() (addr net.Addr, err error) {
 
 			if int(coreProtocol) != CoreProtocolVersion {
 				err = fmt.Errorf("Incompatible core API version with plugin. "+
-					"Plugin version: %s, Ours: %d\n\n"+
+					"Plugin version: %s, Core version: %d\n\n"+
 					"To fix this, the plugin usually only needs to be recompiled.\n"+
 					"Please report this to the plugin author.", parts[0], CoreProtocolVersion)
 				return
@@ -513,7 +624,7 @@ func (c *Client) Start() (addr net.Addr, err error) {
 		// Test the API version
 		if uint(protocol) != c.config.ProtocolVersion {
 			err = fmt.Errorf("Incompatible API version with plugin. "+
-				"Plugin version: %s, Ours: %d", parts[1], c.config.ProtocolVersion)
+				"Plugin version: %s, Core version: %d", parts[1], c.config.ProtocolVersion)
 			return
 		}
 
@@ -525,6 +636,27 @@ func (c *Client) Start() (addr net.Addr, err error) {
 		default:
 			err = fmt.Errorf("Unknown address type: %s", parts[3])
 		}
+
+		// If we have a server type, then record that. We default to net/rpc
+		// for backwards compatibility.
+		c.protocol = ProtocolNetRPC
+		if len(parts) >= 5 {
+			c.protocol = Protocol(parts[4])
+		}
+
+		found := false
+		for _, p := range c.config.AllowedProtocols {
+			if p == c.protocol {
+				found = true
+				break
+			}
+		}
+		if !found {
+			err = fmt.Errorf("Unsupported plugin protocol %q. Supported: %v",
+				c.protocol, c.config.AllowedProtocols)
+			return
+		}
+
 	}
 
 	c.address = addr
@@ -555,20 +687,79 @@ func (c *Client) ReattachConfig() *ReattachConfig {
 	}
 
 	return &ReattachConfig{
-		Addr: c.address,
+		Protocol: c.protocol,
-		Pid:  c.config.Cmd.Process.Pid,
+		Addr:     c.address,
+		Pid:      c.config.Cmd.Process.Pid,
 	}
 }
 
+// Protocol returns the protocol of server on the remote end. This will
+// start the plugin process if it isn't already started. Errors from
+// starting the plugin are surpressed and ProtocolInvalid is returned. It
+// is recommended you call Start explicitly before calling Protocol to ensure
+// no errors occur.
+func (c *Client) Protocol() Protocol {
+	_, err := c.Start()
+	if err != nil {
+		return ProtocolInvalid
+	}
+
+	return c.protocol
+}
+
+// dialer is compatible with grpc.WithDialer and creates the connection
+// to the plugin.
+func (c *Client) dialer(_ string, timeout time.Duration) (net.Conn, error) {
+	// Connect to the client
+	conn, err := net.Dial(c.address.Network(), c.address.String())
+	if err != nil {
+		return nil, err
+	}
+	if tcpConn, ok := conn.(*net.TCPConn); ok {
+		// Make sure to set keep alive so that the connection doesn't die
+		tcpConn.SetKeepAlive(true)
+	}
+
+	// If we have a TLS config we wrap our connection. We only do this
+	// for net/rpc since gRPC uses its own mechanism for TLS.
+	if c.protocol == ProtocolNetRPC && c.config.TLSConfig != nil {
+		conn = tls.Client(conn, c.config.TLSConfig)
+	}
+
+	return conn, nil
+}
+
 func (c *Client) logStderr(r io.Reader) {
 	bufR := bufio.NewReader(r)
 	for {
 		line, err := bufR.ReadString('\n')
 		if line != "" {
 			c.config.Stderr.Write([]byte(line))
-
 			line = strings.TrimRightFunc(line, unicode.IsSpace)
-			log.Printf("[DEBUG] plugin: %s: %s", filepath.Base(c.config.Cmd.Path), line)
+
+			l := c.logger.Named(filepath.Base(c.config.Cmd.Path))
+
+			entry, err := parseJSON(line)
+			// If output is not JSON format, print directly to Debug
+			if err != nil {
+				l.Debug(line)
+			} else {
+				out := flattenKVPairs(entry.KVPairs)
+
+				l = l.With("timestamp", entry.Timestamp.Format(hclog.TimeFormat))
+				switch hclog.LevelFromString(entry.Level) {
+				case hclog.Trace:
+					l.Trace(entry.Message, out...)
+				case hclog.Debug:
+					l.Debug(entry.Message, out...)
+				case hclog.Info:
+					l.Info(entry.Message, out...)
+				case hclog.Warn:
+					l.Warn(entry.Message, out...)
+				case hclog.Error:
+					l.Error(entry.Message, out...)
+				}
+			}
 		}
 
 		if err == io.EOF {

vendor/github.com/hashicorp/go-plugin/grpc_client.go

@@ -0,0 +1,83 @@
+package plugin
+
+import (
+	"fmt"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/health/grpc_health_v1"
+)
+
+// newGRPCClient creates a new GRPCClient. The Client argument is expected
+// to be successfully started already with a lock held.
+func newGRPCClient(c *Client) (*GRPCClient, error) {
+	// Build dialing options.
+	opts := make([]grpc.DialOption, 0, 5)
+
+	// We use a custom dialer so that we can connect over unix domain sockets
+	opts = append(opts, grpc.WithDialer(c.dialer))
+
+	// go-plugin expects to block the connection
+	opts = append(opts, grpc.WithBlock())
+
+	// Fail right away
+	opts = append(opts, grpc.FailOnNonTempDialError(true))
+
+	// If we have no TLS configuration set, we need to explicitly tell grpc
+	// that we're connecting with an insecure connection.
+	if c.config.TLSConfig == nil {
+		opts = append(opts, grpc.WithInsecure())
+	} else {
+		opts = append(opts, grpc.WithTransportCredentials(
+			credentials.NewTLS(c.config.TLSConfig)))
+	}
+
+	// Connect. Note the first parameter is unused because we use a custom
+	// dialer that has the state to see the address.
+	conn, err := grpc.Dial("unused", opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return &GRPCClient{
+		Conn:    conn,
+		Plugins: c.config.Plugins,
+	}, nil
+}
+
+// GRPCClient connects to a GRPCServer over gRPC to dispense plugin types.
+type GRPCClient struct {
+	Conn    *grpc.ClientConn
+	Plugins map[string]Plugin
+}
+
+// ClientProtocol impl.
+func (c *GRPCClient) Close() error {
+	return c.Conn.Close()
+}
+
+// ClientProtocol impl.
+func (c *GRPCClient) Dispense(name string) (interface{}, error) {
+	raw, ok := c.Plugins[name]
+	if !ok {
+		return nil, fmt.Errorf("unknown plugin type: %s", name)
+	}
+
+	p, ok := raw.(GRPCPlugin)
+	if !ok {
+		return nil, fmt.Errorf("plugin %q doesn't support gRPC", name)
+	}
+
+	return p.GRPCClient(c.Conn)
+}
+
+// ClientProtocol impl.
+func (c *GRPCClient) Ping() error {
+	client := grpc_health_v1.NewHealthClient(c.Conn)
+	_, err := client.Check(context.Background(), &grpc_health_v1.HealthCheckRequest{
+		Service: GRPCServiceName,
+	})
+
+	return err
+}

vendor/github.com/hashicorp/go-plugin/grpc_server.go

@@ -0,0 +1,115 @@
+package plugin
+
+import (
+	"bytes"
+	"crypto/tls"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/health"
+	"google.golang.org/grpc/health/grpc_health_v1"
+)
+
+// GRPCServiceName is the name of the service that the health check should
+// return as passing.
+const GRPCServiceName = "plugin"
+
+// DefaultGRPCServer can be used with the "GRPCServer" field for Server
+// as a default factory method to create a gRPC server with no extra options.
+func DefaultGRPCServer(opts []grpc.ServerOption) *grpc.Server {
+	return grpc.NewServer(opts...)
+}
+
+// GRPCServer is a ServerType implementation that serves plugins over
+// gRPC. This allows plugins to easily be written for other languages.
+//
+// The GRPCServer outputs a custom configuration as a base64-encoded
+// JSON structure represented by the GRPCServerConfig config structure.
+type GRPCServer struct {
+	// Plugins are the list of plugins to serve.
+	Plugins map[string]Plugin
+
+	// Server is the actual server that will accept connections. This
+	// will be used for plugin registration as well.
+	Server func([]grpc.ServerOption) *grpc.Server
+
+	// TLS should be the TLS configuration if available. If this is nil,
+	// the connection will not have transport security.
+	TLS *tls.Config
+
+	// DoneCh is the channel that is closed when this server has exited.
+	DoneCh chan struct{}
+
+	// Stdout/StderrLis are the readers for stdout/stderr that will be copied
+	// to the stdout/stderr connection that is output.
+	Stdout io.Reader
+	Stderr io.Reader
+
+	config GRPCServerConfig
+	server *grpc.Server
+}
+
+// ServerProtocol impl.
+func (s *GRPCServer) Init() error {
+	// Create our server
+	var opts []grpc.ServerOption
+	if s.TLS != nil {
+		opts = append(opts, grpc.Creds(credentials.NewTLS(s.TLS)))
+	}
+	s.server = s.Server(opts)
+
+	// Register the health service
+	healthCheck := health.NewServer()
+	healthCheck.SetServingStatus(
+		GRPCServiceName, grpc_health_v1.HealthCheckResponse_SERVING)
+	grpc_health_v1.RegisterHealthServer(s.server, healthCheck)
+
+	// Register all our plugins onto the gRPC server.
+	for k, raw := range s.Plugins {
+		p, ok := raw.(GRPCPlugin)
+		if !ok {
+			return fmt.Errorf("%q is not a GRPC-compatibile plugin", k)
+		}
+
+		if err := p.GRPCServer(s.server); err != nil {
+			return fmt.Errorf("error registring %q: %s", k, err)
+		}
+	}
+
+	return nil
+}
+
+// Config is the GRPCServerConfig encoded as JSON then base64.
+func (s *GRPCServer) Config() string {
+	// Create a buffer that will contain our final contents
+	var buf bytes.Buffer
+
+	// Wrap the base64 encoding with JSON encoding.
+	if err := json.NewEncoder(&buf).Encode(s.config); err != nil {
+		// We panic since ths shouldn't happen under any scenario. We
+		// carefully control the structure being encoded here and it should
+		// always be successful.
+		panic(err)
+	}
+
+	return buf.String()
+}
+
+func (s *GRPCServer) Serve(lis net.Listener) {
+	// Start serving in a goroutine
+	go s.server.Serve(lis)
+
+	// Wait until graceful completion
+	<-s.DoneCh
+}
+
+// GRPCServerConfig is the extra configuration passed along for consumers
+// to facilitate using GRPC plugins.
+type GRPCServerConfig struct {
+	StdoutAddr string `json:"stdout_addr"`
+	StderrAddr string `json:"stderr_addr"`
+}

vendor/github.com/hashicorp/go-plugin/log_entry.go

@@ -0,0 +1,73 @@
+package plugin
+
+import (
+	"encoding/json"
+	"time"
+)
+
+// logEntry is the JSON payload that gets sent to Stderr from the plugin to the host
+type logEntry struct {
+	Message   string        `json:"@message"`
+	Level     string        `json:"@level"`
+	Timestamp time.Time     `json:"timestamp"`
+	KVPairs   []*logEntryKV `json:"kv_pairs"`
+}
+
+// logEntryKV is a key value pair within the Output payload
+type logEntryKV struct {
+	Key   string      `json:"key"`
+	Value interface{} `json:"value"`
+}
+
+// flattenKVPairs is used to flatten KVPair slice into []interface{}
+// for hclog consumption.
+func flattenKVPairs(kvs []*logEntryKV) []interface{} {
+	var result []interface{}
+	for _, kv := range kvs {
+		result = append(result, kv.Key)
+		result = append(result, kv.Value)
+	}
+
+	return result
+}
+
+// parseJSON handles parsing JSON output
+func parseJSON(input string) (*logEntry, error) {
+	var raw map[string]interface{}
+	entry := &logEntry{}
+
+	err := json.Unmarshal([]byte(input), &raw)
+	if err != nil {
+		return nil, err
+	}
+
+	// Parse hclog-specific objects
+	if v, ok := raw["@message"]; ok {
+		entry.Message = v.(string)
+		delete(raw, "@message")
+	}
+
+	if v, ok := raw["@level"]; ok {
+		entry.Level = v.(string)
+		delete(raw, "@level")
+	}
+
+	if v, ok := raw["@timestamp"]; ok {
+		t, err := time.Parse("2006-01-02T15:04:05.000000Z07:00", v.(string))
+		if err != nil {
+			return nil, err
+		}
+		entry.Timestamp = t
+		delete(raw, "@timestamp")
+	}
+
+	// Parse dynamic KV args from the hclog payload.
+	for k, v := range raw {
+		entry.KVPairs = append(entry.KVPairs, &logEntryKV{
+			Key:   k,
+			Value: v,
+		})
+	}
+
+	return entry, nil
+}

vendor/github.com/hashicorp/go-plugin/plugin.go

@@ -9,7 +9,10 @@
 package plugin
 
 import (
+	"errors"
 	"net/rpc"
+
+	"google.golang.org/grpc"
 )
 
 // Plugin is the interface that is implemented to serve/connect to an
@@ -23,3 +26,31 @@ type Plugin interface {
 	// serving that communicates to the server end of the plugin.
 	Client(*MuxBroker, *rpc.Client) (interface{}, error)
 }
+
+// GRPCPlugin is the interface that is implemented to serve/connect to
+// a plugin over gRPC.
+type GRPCPlugin interface {
+	// GRPCServer should register this plugin for serving with the
+	// given GRPCServer. Unlike Plugin.Server, this is only called once
+	// since gRPC plugins serve singletons.
+	GRPCServer(*grpc.Server) error
+
+	// GRPCClient should return the interface implementation for the plugin
+	// you're serving via gRPC.
+	GRPCClient(*grpc.ClientConn) (interface{}, error)
+}
+
+// NetRPCUnsupportedPlugin implements Plugin but returns errors for the
+// Server and Client functions. This will effectively disable support for
+// net/rpc based plugins.
+//
+// This struct can be embedded in your struct.
+type NetRPCUnsupportedPlugin struct{}
+
+func (p NetRPCUnsupportedPlugin) Server(*MuxBroker) (interface{}, error) {
+	return nil, errors.New("net/rpc plugin protocol not supported")
+}
+
+func (p NetRPCUnsupportedPlugin) Client(*MuxBroker, *rpc.Client) (interface{}, error) {
+	return nil, errors.New("net/rpc plugin protocol not supported")
+}

vendor/github.com/hashicorp/go-plugin/protocol.go

@@ -0,0 +1,45 @@
+package plugin
+
+import (
+	"io"
+	"net"
+)
+
+// Protocol is an enum representing the types of protocols.
+type Protocol string
+
+const (
+	ProtocolInvalid Protocol = ""
+	ProtocolNetRPC  Protocol = "netrpc"
+	ProtocolGRPC    Protocol = "grpc"
+)
+
+// ServerProtocol is an interface that must be implemented for new plugin
+// protocols to be servers.
+type ServerProtocol interface {
+	// Init is called once to configure and initialize the protocol, but
+	// not start listening. This is the point at which all validation should
+	// be done and errors returned.
+	Init() error
+
+	// Config is extra configuration to be outputted to stdout. This will
+	// be automatically base64 encoded to ensure it can be parsed properly.
+	// This can be an empty string if additional configuration is not needed.
+	Config() string
+
+	// Serve is called to serve connections on the given listener. This should
+	// continue until the listener is closed.
+	Serve(net.Listener)
+}
+
+// ClientProtocol is an interface that must be implemented for new plugin
+// protocols to be clients.
+type ClientProtocol interface {
+	io.Closer
+
+	// Dispense dispenses a new instance of the plugin with the given name.
+	Dispense(string) (interface{}, error)
+
+	// Ping checks that the client connection is still healthy.
+	Ping() error
+}

vendor/github.com/hashicorp/go-plugin/rpc_client.go

@@ -1,6 +1,7 @@
 package plugin
 
 import (
+	"crypto/tls"
 	"fmt"
 	"io"
 	"net"
@@ -19,6 +20,42 @@ type RPCClient struct {
 	stdout, stderr net.Conn
 }
 
+// newRPCClient creates a new RPCClient. The Client argument is expected
+// to be successfully started already with a lock held.
+func newRPCClient(c *Client) (*RPCClient, error) {
+	// Connect to the client
+	conn, err := net.Dial(c.address.Network(), c.address.String())
+	if err != nil {
+		return nil, err
+	}
+	if tcpConn, ok := conn.(*net.TCPConn); ok {
+		// Make sure to set keep alive so that the connection doesn't die
+		tcpConn.SetKeepAlive(true)
+	}
+
+	if c.config.TLSConfig != nil {
+		conn = tls.Client(conn, c.config.TLSConfig)
+	}
+
+	// Create the actual RPC client
+	result, err := NewRPCClient(conn, c.config.Plugins)
+	if err != nil {
+		conn.Close()
+		return nil, err
+	}
+
+	// Begin the stream syncing so that stdin, out, err work properly
+	err = result.SyncStreams(
+		c.config.SyncStdout,
+		c.config.SyncStderr)
+	if err != nil {
+		result.Close()
+		return nil, err
+	}
+
+	return result, nil
+}
+
 // NewRPCClient creates a client from an already-open connection-like value.
 // Dial is typically used instead.
 func NewRPCClient(conn io.ReadWriteCloser, plugins map[string]Plugin) (*RPCClient, error) {
@@ -121,3 +158,13 @@ func (c *RPCClient) Dispense(name string) (interface{}, error) {
 
 	return p.Client(c.broker, rpc.NewClient(conn))
 }
+
+// Ping pings the connection to ensure it is still alive.
+//
+// The error from the RPC call is returned exactly if you want to inspect
+// it for further error analysis. Any error returned from here would indicate
+// that the connection to the plugin is not healthy.
+func (c *RPCClient) Ping() error {
+	var empty struct{}
+	return c.control.Call("Control.Ping", true, &empty)
+}

vendor/github.com/hashicorp/go-plugin/rpc_server.go

@@ -34,10 +34,14 @@ type RPCServer struct {
 	lock sync.Mutex
 }
 
-// Accept accepts connections on a listener and serves requests for
+// ServerProtocol impl.
-// each incoming connection. Accept blocks; the caller typically invokes
+func (s *RPCServer) Init() error { return nil }
-// it in a go statement.
+
-func (s *RPCServer) Accept(lis net.Listener) {
+// ServerProtocol impl.
+func (s *RPCServer) Config() string { return "" }
+
+// ServerProtocol impl.
+func (s *RPCServer) Serve(lis net.Listener) {
 	for {
 		conn, err := lis.Accept()
 		if err != nil {
@@ -122,6 +126,14 @@ type controlServer struct {
 	server *RPCServer
 }
 
+// Ping can be called to verify the connection (and likely the binary)
+// is still alive to a plugin.
+func (c *controlServer) Ping(
+	null bool, response *struct{}) error {
+	*response = struct{}{}
+	return nil
+}
+
 func (c *controlServer) Quit(
 	null bool, response *struct{}) error {
 	// End the server

vendor/github.com/hashicorp/go-plugin/server.go

@@ -1,6 +1,8 @@
 package plugin
 
 import (
+	"crypto/tls"
+	"encoding/base64"
 	"errors"
 	"fmt"
 	"io/ioutil"
@@ -11,6 +13,10 @@ import (
 	"runtime"
 	"strconv"
 	"sync/atomic"
+
+	"github.com/hashicorp/go-hclog"
+
+	"google.golang.org/grpc"
 )
 
 // CoreProtocolVersion is the ProtocolVersion of the plugin system itself.
@@ -45,14 +51,37 @@ type ServeConfig struct {
 	// HandshakeConfig is the configuration that must match clients.
 	HandshakeConfig
 
+	// TLSProvider is a function that returns a configured tls.Config.
+	TLSProvider func() (*tls.Config, error)
+
 	// Plugins are the plugins that are served.
 	Plugins map[string]Plugin
+
+	// GRPCServer should be non-nil to enable serving the plugins over
+	// gRPC. This is a function to create the server when needed with the
+	// given server options. The server options populated by go-plugin will
+	// be for TLS if set. You may modify the input slice.
+	//
+	// Note that the grpc.Server will automatically be registered with
+	// the gRPC health checking service. This is not optional since go-plugin
+	// relies on this to implement Ping().
+	GRPCServer func([]grpc.ServerOption) *grpc.Server
+}
+
+// Protocol returns the protocol that this server should speak.
+func (c *ServeConfig) Protocol() Protocol {
+	result := ProtocolNetRPC
+	if c.GRPCServer != nil {
+		result = ProtocolGRPC
+	}
+
+	return result
 }
 
 // Serve serves the plugins given by ServeConfig.
 //
 // Serve doesn't return until the plugin is done being executed. Any
-// errors will be outputted to the log.
+// errors will be outputted to os.Stderr.
 //
 // This is the method that plugins should call in their main() functions.
 func Serve(opts *ServeConfig) {
@@ -77,6 +106,13 @@ func Serve(opts *ServeConfig) {
 	// Logging goes to the original stderr
 	log.SetOutput(os.Stderr)
 
+	// internal logger to os.Stderr
+	logger := hclog.New(&hclog.LoggerOptions{
+		Level:      hclog.Trace,
+		Output:     os.Stderr,
+		JSONFormat: true,
+	})
+
 	// Create our new stdout, stderr files. These will override our built-in
 	// stdout/stderr so that it works across the stream boundary.
 	stdout_r, stdout_w, err := os.Pipe()
@@ -93,30 +129,86 @@ func Serve(opts *ServeConfig) {
 	// Register a listener so we can accept a connection
 	listener, err := serverListener()
 	if err != nil {
-		log.Printf("[ERR] plugin: plugin init: %s", err)
+		logger.Error("plugin init error", "error", err)
 		return
 	}
-	defer listener.Close()
+
+	// Close the listener on return. We wrap this in a func() on purpose
+	// because the "listener" reference may change to TLS.
+	defer func() {
+		listener.Close()
+	}()
+
+	var tlsConfig *tls.Config
+	if opts.TLSProvider != nil {
+		tlsConfig, err = opts.TLSProvider()
+		if err != nil {
+			logger.Error("plugin tls init", "error", err)
+			return
+		}
+	}
 
 	// Create the channel to tell us when we're done
 	doneCh := make(chan struct{})
 
-	// Create the RPC server to dispense
+	// Build the server type
-	server := &RPCServer{
+	var server ServerProtocol
-		Plugins: opts.Plugins,
+	switch opts.Protocol() {
-		Stdout:  stdout_r,
+	case ProtocolNetRPC:
-		Stderr:  stderr_r,
+		// If we have a TLS configuration then we wrap the listener
-		DoneCh:  doneCh,
+		// ourselves and do it at that level.
+		if tlsConfig != nil {
+			listener = tls.NewListener(listener, tlsConfig)
+		}
+
+		// Create the RPC server to dispense
+		server = &RPCServer{
+			Plugins: opts.Plugins,
+			Stdout:  stdout_r,
+			Stderr:  stderr_r,
+			DoneCh:  doneCh,
+		}
+
+	case ProtocolGRPC:
+		// Create the gRPC server
+		server = &GRPCServer{
+			Plugins: opts.Plugins,
+			Server:  opts.GRPCServer,
+			TLS:     tlsConfig,
+			Stdout:  stdout_r,
+			Stderr:  stderr_r,
+			DoneCh:  doneCh,
+		}
+
+	default:
+		panic("unknown server protocol: " + opts.Protocol())
 	}
 
+	// Initialize the servers
+	if err := server.Init(); err != nil {
+		logger.Error("protocol init", "error", err)
+		return
+	}
+
+	// Build the extra configuration
+	extra := ""
+	if v := server.Config(); v != "" {
+		extra = base64.StdEncoding.EncodeToString([]byte(v))
+	}
+	if extra != "" {
+		extra = "|" + extra
+	}
+
+	logger.Debug("plugin address", "network", listener.Addr().Network(), "address", listener.Addr().String())
+
 	// Output the address and service name to stdout so that core can bring it up.
-	log.Printf("[DEBUG] plugin: plugin address: %s %s\n",
+	fmt.Printf("%d|%d|%s|%s|%s%s\n",
-		listener.Addr().Network(), listener.Addr().String())
-	fmt.Printf("%d|%d|%s|%s\n",
 		CoreProtocolVersion,
 		opts.ProtocolVersion,
 		listener.Addr().Network(),
-		listener.Addr().String())
+		listener.Addr().String(),
+		opts.Protocol(),
+		extra)
 	os.Stdout.Sync()
 
 	// Eat the interrupts
@@ -127,9 +219,7 @@ func Serve(opts *ServeConfig) {
 		for {
 			<-ch
 			newCount := atomic.AddInt32(&count, 1)
-			log.Printf(
+			logger.Debug("plugin received interrupt signal, ignoring", "count", newCount)
-				"[DEBUG] plugin: received interrupt signal (count: %d). Ignoring.",
-				newCount)
 		}
 	}()
 
@@ -137,10 +227,8 @@ func Serve(opts *ServeConfig) {
 	os.Stdout = stdout_w
 	os.Stderr = stderr_w
 
-	// Serve
+	// Accept connections and wait for completion
-	go server.Accept(listener)
+	go server.Serve(listener)
-
-	// Wait for the graceful exit
 	<-doneCh
 }
 

vendor/github.com/hashicorp/go-plugin/testing.go

@@ -4,7 +4,9 @@ import (
 	"bytes"
 	"net"
 	"net/rpc"
-	"testing"
+
+	"github.com/mitchellh/go-testing-interface"
+	"google.golang.org/grpc"
 )
 
 // The testing file contains test helpers that you can use outside of
@@ -12,7 +14,7 @@ import (
 
 // TestConn is a helper function for returning a client and server
 // net.Conn connected to each other.
-func TestConn(t *testing.T) (net.Conn, net.Conn) {
+func TestConn(t testing.T) (net.Conn, net.Conn) {
 	// Listen to any local port. This listener will be closed
 	// after a single connection is established.
 	l, err := net.Listen("tcp", "127.0.0.1:0")
@@ -46,7 +48,7 @@ func TestConn(t *testing.T) (net.Conn, net.Conn) {
 }
 
 // TestRPCConn returns a rpc client and server connected to each other.
-func TestRPCConn(t *testing.T) (*rpc.Client, *rpc.Server) {
+func TestRPCConn(t testing.T) (*rpc.Client, *rpc.Server) {
 	clientConn, serverConn := TestConn(t)
 
 	server := rpc.NewServer()
@@ -58,7 +60,7 @@ func TestRPCConn(t *testing.T) (*rpc.Client, *rpc.Server) {
 
 // TestPluginRPCConn returns a plugin RPC client and server that are connected
 // together and configured.
-func TestPluginRPCConn(t *testing.T, ps map[string]Plugin) (*RPCClient, *RPCServer) {
+func TestPluginRPCConn(t testing.T, ps map[string]Plugin) (*RPCClient, *RPCServer) {
 	// Create two net.Conns we can use to shuttle our control connection
 	clientConn, serverConn := TestConn(t)
 
@@ -74,3 +76,45 @@ func TestPluginRPCConn(t *testing.T, ps map[string]Plugin) (*RPCClient, *RPCServ
 
 	return client, server
 }
+
+// TestPluginGRPCConn returns a plugin gRPC client and server that are connected
+// together and configured. This is used to test gRPC connections.
+func TestPluginGRPCConn(t testing.T, ps map[string]Plugin) (*GRPCClient, *GRPCServer) {
+	// Create a listener
+	l, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	// Start up the server
+	server := &GRPCServer{
+		Plugins: ps,
+		Server:  DefaultGRPCServer,
+		Stdout:  new(bytes.Buffer),
+		Stderr:  new(bytes.Buffer),
+	}
+	if err := server.Init(); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	go server.Serve(l)
+
+	// Connect to the server
+	conn, err := grpc.Dial(
+		l.Addr().String(),
+		grpc.WithBlock(),
+		grpc.WithInsecure())
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	// Connection successful, close the listener
+	l.Close()
+
+	// Create the client
+	client := &GRPCClient{
+		Conn:    conn,
+		Plugins: ps,
+	}
+
+	return client, server
+}

vendor/github.com/hashicorp/terraform/config/loader_hcl.go

@@ -21,6 +21,7 @@ var ReservedResourceFields = []string{
 	"connection",
 	"count",
 	"depends_on",
+	"id",
 	"lifecycle",
 	"provider",
 	"provisioner",
@@ -28,6 +29,7 @@ var ReservedResourceFields = []string{
 
 var ReservedProviderFields = []string{
 	"alias",
+	"id",
 	"version",
 }
 

vendor/github.com/hashicorp/terraform/dag/walk.go

@@ -166,7 +166,7 @@ func (w *Walker) Update(g *AcyclicGraph) {
 		w.wait.Add(1)
 
 		// Add to our own set so we know about it already
-		log.Printf("[DEBUG] dag/walk: added new vertex: %q", VertexName(v))
+		log.Printf("[TRACE] dag/walk: added new vertex: %q", VertexName(v))
 		w.vertices.Add(raw)
 
 		// Initialize the vertex info
@@ -198,7 +198,7 @@ func (w *Walker) Update(g *AcyclicGraph) {
 		// Delete it out of the map
 		delete(w.vertexMap, v)
 
-		log.Printf("[DEBUG] dag/walk: removed vertex: %q", VertexName(v))
+		log.Printf("[TRACE] dag/walk: removed vertex: %q", VertexName(v))
 		w.vertices.Delete(raw)
 	}
 
@@ -229,7 +229,7 @@ func (w *Walker) Update(g *AcyclicGraph) {
 		changedDeps.Add(waiter)
 
 		log.Printf(
-			"[DEBUG] dag/walk: added edge: %q waiting on %q",
+			"[TRACE] dag/walk: added edge: %q waiting on %q",
 			VertexName(waiter), VertexName(dep))
 		w.edges.Add(raw)
 	}
@@ -253,7 +253,7 @@ func (w *Walker) Update(g *AcyclicGraph) {
 		changedDeps.Add(waiter)
 
 		log.Printf(
-			"[DEBUG] dag/walk: removed edge: %q waiting on %q",
+			"[TRACE] dag/walk: removed edge: %q waiting on %q",
 			VertexName(waiter), VertexName(dep))
 		w.edges.Delete(raw)
 	}
@@ -296,7 +296,7 @@ func (w *Walker) Update(g *AcyclicGraph) {
 		info.depsCancelCh = cancelCh
 
 		log.Printf(
-			"[DEBUG] dag/walk: dependencies changed for %q, sending new deps",
+			"[TRACE] dag/walk: dependencies changed for %q, sending new deps",
 			VertexName(v))
 
 		// Start the waiter
@@ -383,10 +383,10 @@ func (w *Walker) walkVertex(v Vertex, info *walkerVertex) {
 	// Run our callback or note that our upstream failed
 	var err error
 	if depsSuccess {
-		log.Printf("[DEBUG] dag/walk: walking %q", VertexName(v))
+		log.Printf("[TRACE] dag/walk: walking %q", VertexName(v))
 		err = w.Callback(v)
 	} else {
-		log.Printf("[DEBUG] dag/walk: upstream errored, not walking %q", VertexName(v))
+		log.Printf("[TRACE] dag/walk: upstream errored, not walking %q", VertexName(v))
 		err = errWalkUpstream
 	}
 
@@ -423,7 +423,7 @@ func (w *Walker) waitDeps(
 				return
 
 			case <-time.After(time.Second * 5):
-				log.Printf("[DEBUG] dag/walk: vertex %q, waiting for: %q",
+				log.Printf("[TRACE] dag/walk: vertex %q, waiting for: %q",
 					VertexName(v), VertexName(dep))
 			}
 		}

vendor/github.com/hashicorp/terraform/helper/schema/field_reader_diff.go

@@ -29,29 +29,59 @@ type DiffFieldReader struct {
 	Diff   *terraform.InstanceDiff
 	Source FieldReader
 	Schema map[string]*Schema
+
+	// cache for memoizing ReadField calls.
+	cache map[string]cachedFieldReadResult
+}
+
+type cachedFieldReadResult struct {
+	val FieldReadResult
+	err error
 }
 
 func (r *DiffFieldReader) ReadField(address []string) (FieldReadResult, error) {
+	if r.cache == nil {
+		r.cache = make(map[string]cachedFieldReadResult)
+	}
+
+	// Create the cache key by joining around a value that isn't a valid part
+	// of an address. This assumes that the Source and Schema are not changed
+	// for the life of this DiffFieldReader.
+	cacheKey := strings.Join(address, "|")
+	if cached, ok := r.cache[cacheKey]; ok {
+		return cached.val, cached.err
+	}
+
 	schemaList := addrToSchema(address, r.Schema)
 	if len(schemaList) == 0 {
+		r.cache[cacheKey] = cachedFieldReadResult{}
 		return FieldReadResult{}, nil
 	}
 
+	var res FieldReadResult
+	var err error
+
 	schema := schemaList[len(schemaList)-1]
 	switch schema.Type {
 	case TypeBool, TypeInt, TypeFloat, TypeString:
-		return r.readPrimitive(address, schema)
+		res, err = r.readPrimitive(address, schema)
 	case TypeList:
-		return readListField(r, address, schema)
+		res, err = readListField(r, address, schema)
 	case TypeMap:
-		return r.readMap(address, schema)
+		res, err = r.readMap(address, schema)
 	case TypeSet:
-		return r.readSet(address, schema)
+		res, err = r.readSet(address, schema)
 	case typeObject:
-		return readObjectField(r, address, schema.Elem.(map[string]*Schema))
+		res, err = readObjectField(r, address, schema.Elem.(map[string]*Schema))
 	default:
 		panic(fmt.Sprintf("Unknown type: %#v", schema.Type))
 	}
+
+	r.cache[cacheKey] = cachedFieldReadResult{
+		val: res,
+		err: err,
+	}
+	return res, err
 }
 
 func (r *DiffFieldReader) readMap(

vendor/github.com/hashicorp/terraform/helper/schema/resource_data.go

@@ -104,6 +104,22 @@ func (d *ResourceData) GetOk(key string) (interface{}, bool) {
 	return r.Value, exists
 }
 
+// GetOkExists returns the data for a given key and whether or not the key
+// has been set to a non-zero value. This is only useful for determining
+// if boolean attributes have been set, if they are Optional but do not
+// have a Default value.
+//
+// This is nearly the same function as GetOk, yet it does not check
+// for the zero value of the attribute's type. This allows for attributes
+// without a default, to fully check for a literal assignment, regardless
+// of the zero-value for that type.
+// This should only be used if absolutely required/needed.
+func (d *ResourceData) GetOkExists(key string) (interface{}, bool) {
+	r := d.getRaw(key, getSourceSet)
+	exists := r.Exists && !r.Computed
+	return r.Value, exists
+}
+
 func (d *ResourceData) getRaw(key string, level getSource) getResult {
 	var parts []string
 	if key != "" {

vendor/github.com/hashicorp/terraform/plugin/client.go

@@ -1,8 +1,10 @@
 package plugin
 
 import (
+	"os"
 	"os/exec"
 
+	hclog "github.com/hashicorp/go-hclog"
 	plugin "github.com/hashicorp/go-plugin"
 	"github.com/hashicorp/terraform/plugin/discovery"
 )
@@ -10,11 +12,18 @@ import (
 // ClientConfig returns a configuration object that can be used to instantiate
 // a client for the plugin described by the given metadata.
 func ClientConfig(m discovery.PluginMeta) *plugin.ClientConfig {
+	logger := hclog.New(&hclog.LoggerOptions{
+		Name:   "plugin",
+		Level:  hclog.Trace,
+		Output: os.Stderr,
+	})
+
 	return &plugin.ClientConfig{
 		Cmd:             exec.Command(m.Path),
 		HandshakeConfig: Handshake,
 		Managed:         true,
 		Plugins:         PluginMap,
+		Logger:          logger,
 	}
 }
 

vendor/github.com/hashicorp/terraform/plugin/discovery/find.go

@@ -59,7 +59,6 @@ func findPluginPaths(kind string, dirs []string) []string {
 			fullName := item.Name()
 
 			if !strings.HasPrefix(fullName, prefix) {
-				log.Printf("[DEBUG] skipping %q, not a %s", fullName, kind)
 				continue
 			}
 

vendor/github.com/hashicorp/terraform/plugin/discovery/get.go

@@ -16,6 +16,7 @@ import (
 	cleanhttp "github.com/hashicorp/go-cleanhttp"
 	getter "github.com/hashicorp/go-getter"
 	multierror "github.com/hashicorp/go-multierror"
+	"github.com/mitchellh/cli"
 )
 
 // Releases are located by parsing the html listing from releases.hashicorp.com.
@@ -58,6 +59,8 @@ type ProviderInstaller struct {
 
 	// Skip checksum and signature verification
 	SkipVerify bool
+
+	Ui cli.Ui // Ui for output
 }
 
 // Get is part of an implementation of type Installer, and attempts to download
@@ -116,6 +119,7 @@ func (i *ProviderInstaller) Get(provider string, req Constraints) (PluginMeta, e
 
 		log.Printf("[DEBUG] fetching provider info for %s version %s", provider, v)
 		if checkPlugin(url, i.PluginProtocolVersion) {
+			i.Ui.Info(fmt.Sprintf("- Downloading plugin for provider %q (%s)...", provider, v.String()))
 			log.Printf("[DEBUG] getting provider %q version %q at %s", provider, v, url)
 			err := getter.Get(i.Dir, url)
 			if err != nil {
@@ -422,3 +426,7 @@ func getFile(url string) ([]byte, error) {
 	}
 	return data, nil
 }
+
+func GetReleaseHost() string {
+	return releaseHost
+}

vendor/github.com/hashicorp/terraform/terraform/eval.go

@@ -49,11 +49,11 @@ func EvalRaw(n EvalNode, ctx EvalContext) (interface{}, error) {
 		path = strings.Join(ctx.Path(), ".")
 	}
 
-	log.Printf("[DEBUG] %s: eval: %T", path, n)
+	log.Printf("[TRACE] %s: eval: %T", path, n)
 	output, err := n.Eval(ctx)
 	if err != nil {
 		if _, ok := err.(EvalEarlyExitError); ok {
-			log.Printf("[DEBUG] %s: eval: %T, err: %s", path, n, err)
+			log.Printf("[TRACE] %s: eval: %T, err: %s", path, n, err)
 		} else {
 			log.Printf("[ERROR] %s: eval: %T, err: %s", path, n, err)
 		}

vendor/github.com/hashicorp/terraform/terraform/eval_interpolate.go

@@ -1,6 +1,10 @@
 package terraform
 
-import "github.com/hashicorp/terraform/config"
+import (
+	"log"
+
+	"github.com/hashicorp/terraform/config"
+)
 
 // EvalInterpolate is an EvalNode implementation that takes a raw
 // configuration and interpolates it.
@@ -22,3 +26,28 @@ func (n *EvalInterpolate) Eval(ctx EvalContext) (interface{}, error) {
 
 	return nil, nil
 }
+
+// EvalTryInterpolate is an EvalNode implementation that takes a raw
+// configuration and interpolates it, but only logs a warning on an
+// interpolation error, and stops further Eval steps.
+// This is used during Input where a value may not be known before Refresh, but
+// we don't want to block Input.
+type EvalTryInterpolate struct {
+	Config   *config.RawConfig
+	Resource *Resource
+	Output   **ResourceConfig
+}
+
+func (n *EvalTryInterpolate) Eval(ctx EvalContext) (interface{}, error) {
+	rc, err := ctx.Interpolate(n.Config, n.Resource)
+	if err != nil {
+		log.Printf("[WARN] Interpolation %q failed: %s", n.Config.Key, err)
+		return nil, EvalEarlyExitError{}
+	}
+
+	if n.Output != nil {
+		*n.Output = rc
+	}
+
+	return nil, nil
+}

vendor/github.com/hashicorp/terraform/terraform/eval_state.go

@@ -1,6 +1,8 @@
 package terraform
 
-import "fmt"
+import (
+	"fmt"
+)
 
 // EvalReadState is an EvalNode implementation that reads the
 // primary InstanceState for a specific resource out of the state.

vendor/github.com/hashicorp/terraform/terraform/graph.go

@@ -70,7 +70,7 @@ func (g *Graph) walk(walker GraphWalker) error {
 	// Walk the graph.
 	var walkFn dag.WalkFunc
 	walkFn = func(v dag.Vertex) (rerr error) {
-		log.Printf("[DEBUG] vertex '%s.%s': walking", path, dag.VertexName(v))
+		log.Printf("[TRACE] vertex '%s.%s': walking", path, dag.VertexName(v))
 		g.DebugVisitInfo(v, g.debugName)
 
 		// If we have a panic wrap GraphWalker and a panic occurs, recover
@@ -118,7 +118,7 @@ func (g *Graph) walk(walker GraphWalker) error {
 
 			// Allow the walker to change our tree if needed. Eval,
 			// then callback with the output.
-			log.Printf("[DEBUG] vertex '%s.%s': evaluating", path, dag.VertexName(v))
+			log.Printf("[TRACE] vertex '%s.%s': evaluating", path, dag.VertexName(v))
 
 			g.DebugVertexInfo(v, fmt.Sprintf("evaluating %T(%s)", v, path))
 
@@ -132,7 +132,7 @@ func (g *Graph) walk(walker GraphWalker) error {
 		// If the node is dynamically expanded, then expand it
 		if ev, ok := v.(GraphNodeDynamicExpandable); ok {
 			log.Printf(
-				"[DEBUG] vertex '%s.%s': expanding/walking dynamic subgraph",
+				"[TRACE] vertex '%s.%s': expanding/walking dynamic subgraph",
 				path,
 				dag.VertexName(v))
 
@@ -154,7 +154,7 @@ func (g *Graph) walk(walker GraphWalker) error {
 		// If the node has a subgraph, then walk the subgraph
 		if sn, ok := v.(GraphNodeSubgraph); ok {
 			log.Printf(
-				"[DEBUG] vertex '%s.%s': walking subgraph",
+				"[TRACE] vertex '%s.%s': walking subgraph",
 				path,
 				dag.VertexName(v))
 

vendor/github.com/hashicorp/terraform/terraform/graph_builder_input.go

@@ -10,6 +10,9 @@ import (
 // and is based on the PlanGraphBuilder. The PlanGraphBuilder passed in will be
 // modified and should not be used for any other operations.
 func InputGraphBuilder(p *PlanGraphBuilder) GraphBuilder {
+	// convert this to an InputPlan
+	p.Input = true
+
 	// We're going to customize the concrete functions
 	p.CustomConcrete = true
 

vendor/github.com/hashicorp/terraform/terraform/graph_builder_plan.go

@@ -40,6 +40,9 @@ type PlanGraphBuilder struct {
 	// Validate will do structural validation of the graph.
 	Validate bool
 
+	// Input represents that this builder is for an Input operation.
+	Input bool
+
 	// CustomConcrete can be set to customize the node types created
 	// for various parts of the plan. This is useful in order to customize
 	// the plan behavior.
@@ -107,7 +110,10 @@ func (b *PlanGraphBuilder) Steps() []GraphTransformer {
 		),
 
 		// Add module variables
-		&ModuleVariableTransformer{Module: b.Module},
+		&ModuleVariableTransformer{
+			Module: b.Module,
+			Input:  b.Input,
+		},
 
 		// Connect so that the references are ready for targeting. We'll
 		// have to connect again later for providers and so on.

vendor/github.com/hashicorp/terraform/terraform/node_module_variable.go

@@ -15,6 +15,9 @@ type NodeApplyableModuleVariable struct {
 	Value     *config.RawConfig // Value is the value that is set
 
 	Module *module.Tree // Antiquated, want to remove
+
+	// Input is set if this graph was created for the Input operation.
+	Input bool
 }
 
 func (n *NodeApplyableModuleVariable) Name() string {
@@ -92,12 +95,24 @@ func (n *NodeApplyableModuleVariable) EvalTree() EvalNode {
 	// within the variables mapping.
 	var config *ResourceConfig
 	variables := make(map[string]interface{})
+
+	var interpolate EvalNode
+
+	if n.Input {
+		interpolate = &EvalTryInterpolate{
+			Config: n.Value,
+			Output: &config,
+		}
+	} else {
+		interpolate = &EvalInterpolate{
+			Config: n.Value,
+			Output: &config,
+		}
+	}
+
 	return &EvalSequence{
 		Nodes: []EvalNode{
-			&EvalInterpolate{
+			interpolate,
-				Config: n.Value,
-				Output: &config,
-			},
 
 			&EvalVariableBlock{
 				Config:         &config,

vendor/github.com/hashicorp/terraform/terraform/transform_module_variable.go

@@ -17,6 +17,7 @@ type ModuleVariableTransformer struct {
 	Module *module.Tree
 
 	DisablePrune bool // True if pruning unreferenced should be disabled
+	Input        bool // True if this is from an Input operation.
 }
 
 func (t *ModuleVariableTransformer) Transform(g *Graph) error {
@@ -99,6 +100,7 @@ func (t *ModuleVariableTransformer) transformSingle(g *Graph, parent, m *module.
 			Config:    v,
 			Value:     value,
 			Module:    t.Module,
+			Input:     t.Input,
 		}
 
 		if !t.DisablePrune {

vendor/github.com/hashicorp/terraform/terraform/version.go

@@ -7,12 +7,12 @@ import (
 )
 
 // The main version number that is being run at the moment.
-const Version = "0.10.0"
+const Version = "0.10.1"
 
 // A pre-release marker for the version. If this is "" (empty string)
 // then it means that it is a final release. Otherwise, this is a pre-release
 // such as "dev" (in development), "beta", "rc1", etc.
-var VersionPrerelease = "dev"
+var VersionPrerelease = ""
 
 // SemVersion is an instance of version.Version. This has the secondary
 // benefit of verifying during tests and init time that our version is a

vendor/github.com/mattn/go-isatty/LICENSE

@@ -0,0 +1,9 @@
+Copyright (c) Yasuhiro MATSUMOTO <mattn.jp@gmail.com>
+
+MIT License (Expat)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/mattn/go-isatty/README.md

@@ -0,0 +1,50 @@
+# go-isatty
+
+[![Godoc Reference](https://godoc.org/github.com/mattn/go-isatty?status.svg)](http://godoc.org/github.com/mattn/go-isatty)
+[![Build Status](https://travis-ci.org/mattn/go-isatty.svg?branch=master)](https://travis-ci.org/mattn/go-isatty)
+[![Coverage Status](https://coveralls.io/repos/github/mattn/go-isatty/badge.svg?branch=master)](https://coveralls.io/github/mattn/go-isatty?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/mattn/go-isatty)](https://goreportcard.com/report/mattn/go-isatty)
+
+isatty for golang
+
+## Usage
+
+```go
+package main
+
+import (
+	"fmt"
+	"github.com/mattn/go-isatty"
+	"os"
+)
+
+func main() {
+	if isatty.IsTerminal(os.Stdout.Fd()) {
+		fmt.Println("Is Terminal")
+	} else if isatty.IsCygwinTerminal(os.Stdout.Fd()) {
+		fmt.Println("Is Cygwin/MSYS2 Terminal")
+	} else {
+		fmt.Println("Is Not Terminal")
+	}
+}
+```
+
+## Installation
+
+```
+$ go get github.com/mattn/go-isatty
+```
+
+## License
+
+MIT
+
+## Author
+
+Yasuhiro Matsumoto (a.k.a mattn)
+
+## Thanks
+
+* k-takata: base idea for IsCygwinTerminal
+
+    https://github.com/k-takata/go-iscygpty

vendor/github.com/mattn/go-isatty/doc.go

@@ -0,0 +1,2 @@
+// Package isatty implements interface to isatty
+package isatty

vendor/github.com/mattn/go-isatty/isatty_bsd.go

@@ -0,0 +1,18 @@
+// +build darwin freebsd openbsd netbsd dragonfly
+// +build !appengine
+
+package isatty
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+const ioctlReadTermios = syscall.TIOCGETA
+
+// IsTerminal return true if the file descriptor is terminal.
+func IsTerminal(fd uintptr) bool {
+	var termios syscall.Termios
+	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
+	return err == 0
+}

vendor/github.com/mattn/go-isatty/isatty_linux.go

@@ -0,0 +1,18 @@
+// +build linux
+// +build !appengine,!ppc64,!ppc64le
+
+package isatty
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+const ioctlReadTermios = syscall.TCGETS
+
+// IsTerminal return true if the file descriptor is terminal.
+func IsTerminal(fd uintptr) bool {
+	var termios syscall.Termios
+	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
+	return err == 0
+}

vendor/github.com/mattn/go-isatty/isatty_linux_ppc64x.go

@@ -0,0 +1,19 @@
+// +build linux
+// +build ppc64 ppc64le
+
+package isatty
+
+import (
+	"unsafe"
+
+	syscall "golang.org/x/sys/unix"
+)
+
+const ioctlReadTermios = syscall.TCGETS
+
+// IsTerminal return true if the file descriptor is terminal.
+func IsTerminal(fd uintptr) bool {
+	var termios syscall.Termios
+	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
+	return err == 0
+}

vendor/github.com/mattn/go-isatty/isatty_others.go

@@ -0,0 +1,10 @@
+// +build !windows
+// +build !appengine
+
+package isatty
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}

vendor/github.com/mattn/go-isatty/isatty_solaris.go

@@ -0,0 +1,16 @@
+// +build solaris
+// +build !appengine
+
+package isatty
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+// IsTerminal returns true if the given file descriptor is a terminal.
+// see: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libbc/libc/gen/common/isatty.c
+func IsTerminal(fd uintptr) bool {
+	var termio unix.Termio
+	err := unix.IoctlSetTermio(int(fd), unix.TCGETA, &termio)
+	return err == nil
+}

vendor/github.com/mattn/go-isatty/isatty_windows.go

@@ -0,0 +1,94 @@
+// +build windows
+// +build !appengine
+
+package isatty
+
+import (
+	"strings"
+	"syscall"
+	"unicode/utf16"
+	"unsafe"
+)
+
+const (
+	fileNameInfo uintptr = 2
+	fileTypePipe         = 3
+)
+
+var (
+	kernel32                         = syscall.NewLazyDLL("kernel32.dll")
+	procGetConsoleMode               = kernel32.NewProc("GetConsoleMode")
+	procGetFileInformationByHandleEx = kernel32.NewProc("GetFileInformationByHandleEx")
+	procGetFileType                  = kernel32.NewProc("GetFileType")
+)
+
+func init() {
+	// Check if GetFileInformationByHandleEx is available.
+	if procGetFileInformationByHandleEx.Find() != nil {
+		procGetFileInformationByHandleEx = nil
+	}
+}
+
+// IsTerminal return true if the file descriptor is terminal.
+func IsTerminal(fd uintptr) bool {
+	var st uint32
+	r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, fd, uintptr(unsafe.Pointer(&st)), 0)
+	return r != 0 && e == 0
+}
+
+// Check pipe name is used for cygwin/msys2 pty.
+// Cygwin/MSYS2 PTY has a name like:
+//   \{cygwin,msys}-XXXXXXXXXXXXXXXX-ptyN-{from,to}-master
+func isCygwinPipeName(name string) bool {
+	token := strings.Split(name, "-")
+	if len(token) < 5 {
+		return false
+	}
+
+	if token[0] != `\msys` && token[0] != `\cygwin` {
+		return false
+	}
+
+	if token[1] == "" {
+		return false
+	}
+
+	if !strings.HasPrefix(token[2], "pty") {
+		return false
+	}
+
+	if token[3] != `from` && token[3] != `to` {
+		return false
+	}
+
+	if token[4] != "master" {
+		return false
+	}
+
+	return true
+}
+
+// IsCygwinTerminal() return true if the file descriptor is a cygwin or msys2
+// terminal.
+func IsCygwinTerminal(fd uintptr) bool {
+	if procGetFileInformationByHandleEx == nil {
+		return false
+	}
+
+	// Cygwin/msys's pty is a pipe.
+	ft, _, e := syscall.Syscall(procGetFileType.Addr(), 1, fd, 0, 0)
+	if ft != fileTypePipe || e != 0 {
+		return false
+	}
+
+	var buf [2 + syscall.MAX_PATH]uint16
+	r, _, e := syscall.Syscall6(procGetFileInformationByHandleEx.Addr(),
+		4, fd, fileNameInfo, uintptr(unsafe.Pointer(&buf)),
+		uintptr(len(buf)*2), 0, 0)
+	if r == 0 || e != 0 {
+		return false
+	}
+
+	l := *(*uint32)(unsafe.Pointer(&buf))
+	return isCygwinPipeName(string(utf16.Decode(buf[2 : 2+l/2])))
+}

vendor/github.com/mitchellh/cli/LICENSE

@@ -0,0 +1,354 @@
+Mozilla Public License, version 2.0
+
+1. Definitions
+
+1.1. “Contributor”
+
+     means each individual or legal entity that creates, contributes to the
+     creation of, or owns Covered Software.
+
+1.2. “Contributor Version”
+
+     means the combination of the Contributions of others (if any) used by a
+     Contributor and that particular Contributor’s Contribution.
+
+1.3. “Contribution”
+
+     means Covered Software of a particular Contributor.
+
+1.4. “Covered Software”
+
+     means Source Code Form to which the initial Contributor has attached the
+     notice in Exhibit A, the Executable Form of such Source Code Form, and
+     Modifications of such Source Code Form, in each case including portions
+     thereof.
+
+1.5. “Incompatible With Secondary Licenses”
+     means
+
+     a. that the initial Contributor has attached the notice described in
+        Exhibit B to the Covered Software; or
+
+     b. that the Covered Software was made available under the terms of version
+        1.1 or earlier of the License, but not also under the terms of a
+        Secondary License.
+
+1.6. “Executable Form”
+
+     means any form of the work other than Source Code Form.
+
+1.7. “Larger Work”
+
+     means a work that combines Covered Software with other material, in a separate
+     file or files, that is not Covered Software.
+
+1.8. “License”
+
+     means this document.
+
+1.9. “Licensable”
+
+     means having the right to grant, to the maximum extent possible, whether at the
+     time of the initial grant or subsequently, any and all of the rights conveyed by
+     this License.
+
+1.10. “Modifications”
+
+     means any of the following:
+
+     a. any file in Source Code Form that results from an addition to, deletion
+        from, or modification of the contents of Covered Software; or
+
+     b. any new file in Source Code Form that contains any Covered Software.
+
+1.11. “Patent Claims” of a Contributor
+
+      means any patent claim(s), including without limitation, method, process,
+      and apparatus claims, in any patent Licensable by such Contributor that
+      would be infringed, but for the grant of the License, by the making,
+      using, selling, offering for sale, having made, import, or transfer of
+      either its Contributions or its Contributor Version.
+
+1.12. “Secondary License”
+
+      means either the GNU General Public License, Version 2.0, the GNU Lesser
+      General Public License, Version 2.1, the GNU Affero General Public
+      License, Version 3.0, or any later versions of those licenses.
+
+1.13. “Source Code Form”
+
+      means the form of the work preferred for making modifications.
+
+1.14. “You” (or “Your”)
+
+      means an individual or a legal entity exercising rights under this
+      License. For legal entities, “You” includes any entity that controls, is
+      controlled by, or is under common control with You. For purposes of this
+      definition, “control” means (a) the power, direct or indirect, to cause
+      the direction or management of such entity, whether by contract or
+      otherwise, or (b) ownership of more than fifty percent (50%) of the
+      outstanding shares or beneficial ownership of such entity.
+
+
+2. License Grants and Conditions
+
+2.1. Grants
+
+     Each Contributor hereby grants You a world-wide, royalty-free,
+     non-exclusive license:
+
+     a. under intellectual property rights (other than patent or trademark)
+        Licensable by such Contributor to use, reproduce, make available,
+        modify, display, perform, distribute, and otherwise exploit its
+        Contributions, either on an unmodified basis, with Modifications, or as
+        part of a Larger Work; and
+
+     b. under Patent Claims of such Contributor to make, use, sell, offer for
+        sale, have made, import, and otherwise transfer either its Contributions
+        or its Contributor Version.
+
+2.2. Effective Date
+
+     The licenses granted in Section 2.1 with respect to any Contribution become
+     effective for each Contribution on the date the Contributor first distributes
+     such Contribution.
+
+2.3. Limitations on Grant Scope
+
+     The licenses granted in this Section 2 are the only rights granted under this
+     License. No additional rights or licenses will be implied from the distribution
+     or licensing of Covered Software under this License. Notwithstanding Section
+     2.1(b) above, no patent license is granted by a Contributor:
+
+     a. for any code that a Contributor has removed from Covered Software; or
+
+     b. for infringements caused by: (i) Your and any other third party’s
+        modifications of Covered Software, or (ii) the combination of its
+        Contributions with other software (except as part of its Contributor
+        Version); or
+
+     c. under Patent Claims infringed by Covered Software in the absence of its
+        Contributions.
+
+     This License does not grant any rights in the trademarks, service marks, or
+     logos of any Contributor (except as may be necessary to comply with the
+     notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+     No Contributor makes additional grants as a result of Your choice to
+     distribute the Covered Software under a subsequent version of this License
+     (see Section 10.2) or under the terms of a Secondary License (if permitted
+     under the terms of Section 3.3).
+
+2.5. Representation
+
+     Each Contributor represents that the Contributor believes its Contributions
+     are its original creation(s) or it has sufficient rights to grant the
+     rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+     This License is not intended to limit any rights You have under applicable
+     copyright doctrines of fair use, fair dealing, or other equivalents.
+
+2.7. Conditions
+
+     Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
+     Section 2.1.
+
+
+3. Responsibilities
+
+3.1. Distribution of Source Form
+
+     All distribution of Covered Software in Source Code Form, including any
+     Modifications that You create or to which You contribute, must be under the
+     terms of this License. You must inform recipients that the Source Code Form
+     of the Covered Software is governed by the terms of this License, and how
+     they can obtain a copy of this License. You may not attempt to alter or
+     restrict the recipients’ rights in the Source Code Form.
+
+3.2. Distribution of Executable Form
+
+     If You distribute Covered Software in Executable Form then:
+
+     a. such Covered Software must also be made available in Source Code Form,
+        as described in Section 3.1, and You must inform recipients of the
+        Executable Form how they can obtain a copy of such Source Code Form by
+        reasonable means in a timely manner, at a charge no more than the cost
+        of distribution to the recipient; and
+
+     b. You may distribute such Executable Form under the terms of this License,
+        or sublicense it under different terms, provided that the license for
+        the Executable Form does not attempt to limit or alter the recipients’
+        rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+     You may create and distribute a Larger Work under terms of Your choice,
+     provided that You also comply with the requirements of this License for the
+     Covered Software. If the Larger Work is a combination of Covered Software
+     with a work governed by one or more Secondary Licenses, and the Covered
+     Software is not Incompatible With Secondary Licenses, this License permits
+     You to additionally distribute such Covered Software under the terms of
+     such Secondary License(s), so that the recipient of the Larger Work may, at
+     their option, further distribute the Covered Software under the terms of
+     either this License or such Secondary License(s).
+
+3.4. Notices
+
+     You may not remove or alter the substance of any license notices (including
+     copyright notices, patent notices, disclaimers of warranty, or limitations
+     of liability) contained within the Source Code Form of the Covered
+     Software, except that You may alter any license notices to the extent
+     required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+     You may choose to offer, and to charge a fee for, warranty, support,
+     indemnity or liability obligations to one or more recipients of Covered
+     Software. However, You may do so only on Your own behalf, and not on behalf
+     of any Contributor. You must make it absolutely clear that any such
+     warranty, support, indemnity, or liability obligation is offered by You
+     alone, and You hereby agree to indemnify every Contributor for any
+     liability incurred by such Contributor as a result of warranty, support,
+     indemnity or liability terms You offer. You may include additional
+     disclaimers of warranty and limitations of liability specific to any
+     jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+
+   If it is impossible for You to comply with any of the terms of this License
+   with respect to some or all of the Covered Software due to statute, judicial
+   order, or regulation then You must: (a) comply with the terms of this License
+   to the maximum extent possible; and (b) describe the limitations and the code
+   they affect. Such description must be placed in a text file included with all
+   distributions of the Covered Software under this License. Except to the
+   extent prohibited by statute or regulation, such description must be
+   sufficiently detailed for a recipient of ordinary skill to be able to
+   understand it.
+
+5. Termination
+
+5.1. The rights granted under this License will terminate automatically if You
+     fail to comply with any of its terms. However, if You become compliant,
+     then the rights granted under this License from a particular Contributor
+     are reinstated (a) provisionally, unless and until such Contributor
+     explicitly and finally terminates Your grants, and (b) on an ongoing basis,
+     if such Contributor fails to notify You of the non-compliance by some
+     reasonable means prior to 60 days after You have come back into compliance.
+     Moreover, Your grants from a particular Contributor are reinstated on an
+     ongoing basis if such Contributor notifies You of the non-compliance by
+     some reasonable means, this is the first time You have received notice of
+     non-compliance with this License from such Contributor, and You become
+     compliant prior to 30 days after Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+     infringement claim (excluding declaratory judgment actions, counter-claims,
+     and cross-claims) alleging that a Contributor Version directly or
+     indirectly infringes any patent, then the rights granted to You by any and
+     all Contributors for the Covered Software under Section 2.1 of this License
+     shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
+     license agreements (excluding distributors and resellers) which have been
+     validly granted by You or Your distributors under this License prior to
+     termination shall survive termination.
+
+6. Disclaimer of Warranty
+
+   Covered Software is provided under this License on an “as is” basis, without
+   warranty of any kind, either expressed, implied, or statutory, including,
+   without limitation, warranties that the Covered Software is free of defects,
+   merchantable, fit for a particular purpose or non-infringing. The entire
+   risk as to the quality and performance of the Covered Software is with You.
+   Should any Covered Software prove defective in any respect, You (not any
+   Contributor) assume the cost of any necessary servicing, repair, or
+   correction. This disclaimer of warranty constitutes an essential part of this
+   License. No use of  any Covered Software is authorized under this License
+   except under this disclaimer.
+
+7. Limitation of Liability
+
+   Under no circumstances and under no legal theory, whether tort (including
+   negligence), contract, or otherwise, shall any Contributor, or anyone who
+   distributes Covered Software as permitted above, be liable to You for any
+   direct, indirect, special, incidental, or consequential damages of any
+   character including, without limitation, damages for lost profits, loss of
+   goodwill, work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses, even if such party shall have been
+   informed of the possibility of such damages. This limitation of liability
+   shall not apply to liability for death or personal injury resulting from such
+   party’s negligence to the extent applicable law prohibits such limitation.
+   Some jurisdictions do not allow the exclusion or limitation of incidental or
+   consequential damages, so this exclusion and limitation may not apply to You.
+
+8. Litigation
+
+   Any litigation relating to this License may be brought only in the courts of
+   a jurisdiction where the defendant maintains its principal place of business
+   and such litigation shall be governed by laws of that jurisdiction, without
+   reference to its conflict-of-law provisions. Nothing in this Section shall
+   prevent a party’s ability to bring cross-claims or counter-claims.
+
+9. Miscellaneous
+
+   This License represents the complete agreement concerning the subject matter
+   hereof. If any provision of this License is held to be unenforceable, such
+   provision shall be reformed only to the extent necessary to make it
+   enforceable. Any law or regulation which provides that the language of a
+   contract shall be construed against the drafter shall not be used to construe
+   this License against a Contributor.
+
+
+10. Versions of the License
+
+10.1. New Versions
+
+      Mozilla Foundation is the license steward. Except as provided in Section
+      10.3, no one other than the license steward has the right to modify or
+      publish new versions of this License. Each version will be given a
+      distinguishing version number.
+
+10.2. Effect of New Versions
+
+      You may distribute the Covered Software under the terms of the version of
+      the License under which You originally received the Covered Software, or
+      under the terms of any subsequent version published by the license
+      steward.
+
+10.3. Modified Versions
+
+      If you create software not governed by this License, and you want to
+      create a new license for such software, you may create and use a modified
+      version of this License if you rename the license and remove any
+      references to the name of the license steward (except to note that such
+      modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
+      If You choose to distribute Source Code Form that is Incompatible With
+      Secondary Licenses under the terms of this version of the License, the
+      notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+
+      This Source Code Form is subject to the
+      terms of the Mozilla Public License, v.
+      2.0. If a copy of the MPL was not
+      distributed with this file, You can
+      obtain one at
+      http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular file, then
+You may include the notice in a location (such as a LICENSE file in a relevant
+directory) where a recipient would be likely to look for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - “Incompatible With Secondary Licenses” Notice
+
+      This Source Code Form is “Incompatible
+      With Secondary Licenses”, as defined by
+      the Mozilla Public License, v. 2.0.
+

vendor/github.com/mitchellh/cli/Makefile

@@ -0,0 +1,20 @@
+TEST?=./...
+
+default: test
+
+# test runs the test suite and vets the code
+test:
+	go list $(TEST) | xargs -n1 go test -timeout=60s -parallel=10 $(TESTARGS)
+
+# testrace runs the race checker
+testrace:
+	go list $(TEST) | xargs -n1 go test -race $(TESTARGS)
+
+# updatedeps installs all the dependencies to run and build
+updatedeps:
+	go list ./... \
+		| xargs go list -f '{{ join .Deps "\n" }}{{ printf "\n" }}{{ join .TestImports "\n" }}' \
+		| grep -v github.com/mitchellh/cli \
+		| xargs go get -f -u -v
+
+.PHONY: test testrace updatedeps

vendor/github.com/mitchellh/cli/README.md

@@ -0,0 +1,67 @@
+# Go CLI Library [![GoDoc](https://godoc.org/github.com/mitchellh/cli?status.png)](https://godoc.org/github.com/mitchellh/cli)
+
+cli is a library for implementing powerful command-line interfaces in Go.
+cli is the library that powers the CLI for
+[Packer](https://github.com/mitchellh/packer),
+[Serf](https://github.com/hashicorp/serf),
+[Consul](https://github.com/hashicorp/consul),
+[Vault](https://github.com/hashicorp/vault),
+[Terraform](https://github.com/hashicorp/terraform), and
+[Nomad](https://github.com/hashicorp/nomad).
+
+## Features
+
+* Easy sub-command based CLIs: `cli foo`, `cli bar`, etc.
+
+* Support for nested subcommands such as `cli foo bar`.
+
+* Optional support for default subcommands so `cli` does something
+  other than error.
+
+* Support for shell autocompletion of subcommands, flags, and arguments
+  with callbacks in Go. You don't need to write any shell code.
+
+* Automatic help generation for listing subcommands
+
+* Automatic help flag recognition of `-h`, `--help`, etc.
+
+* Automatic version flag recognition of `-v`, `--version`.
+
+* Helpers for interacting with the terminal, such as outputting information,
+  asking for input, etc. These are optional, you can always interact with the
+  terminal however you choose.
+
+* Use of Go interfaces/types makes augmenting various parts of the library a
+  piece of cake.
+
+## Example
+
+Below is a simple example of creating and running a CLI
+
+```go
+package main
+
+import (
+	"log"
+	"os"
+
+	"github.com/mitchellh/cli"
+)
+
+func main() {
+	c := cli.NewCLI("app", "1.0.0")
+	c.Args = os.Args[1:]
+	c.Commands = map[string]cli.CommandFactory{
+		"foo": fooCommandFactory,
+		"bar": barCommandFactory,
+	}
+
+	exitStatus, err := c.Run()
+	if err != nil {
+		log.Println(err)
+	}
+
+	os.Exit(exitStatus)
+}
+```
+

vendor/github.com/mitchellh/cli/autocomplete.go

@@ -0,0 +1,43 @@
+package cli
+
+import (
+	"github.com/posener/complete/cmd/install"
+)
+
+// autocompleteInstaller is an interface to be implemented to perform the
+// autocomplete installation and uninstallation with a CLI.
+//
+// This interface is not exported because it only exists for unit tests
+// to be able to test that the installation is called properly.
+type autocompleteInstaller interface {
+	Install(string) error
+	Uninstall(string) error
+}
+
+// realAutocompleteInstaller uses the real install package to do the
+// install/uninstall.
+type realAutocompleteInstaller struct{}
+
+func (i *realAutocompleteInstaller) Install(cmd string) error {
+	return install.Install(cmd)
+}
+
+func (i *realAutocompleteInstaller) Uninstall(cmd string) error {
+	return install.Uninstall(cmd)
+}
+
+// mockAutocompleteInstaller is used for tests to record the install/uninstall.
+type mockAutocompleteInstaller struct {
+	InstallCalled   bool
+	UninstallCalled bool
+}
+
+func (i *mockAutocompleteInstaller) Install(cmd string) error {
+	i.InstallCalled = true
+	return nil
+}
+
+func (i *mockAutocompleteInstaller) Uninstall(cmd string) error {
+	i.UninstallCalled = true
+	return nil
+}

vendor/github.com/mitchellh/cli/cli.go

@@ -0,0 +1,695 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"regexp"
+	"sort"
+	"strings"
+	"sync"
+	"text/template"
+
+	"github.com/armon/go-radix"
+	"github.com/posener/complete"
+)
+
+// CLI contains the state necessary to run subcommands and parse the
+// command line arguments.
+//
+// CLI also supports nested subcommands, such as "cli foo bar". To use
+// nested subcommands, the key in the Commands mapping below contains the
+// full subcommand. In this example, it would be "foo bar".
+//
+// If you use a CLI with nested subcommands, some semantics change due to
+// ambiguities:
+//
+//   * We use longest prefix matching to find a matching subcommand. This
+//     means if you register "foo bar" and the user executes "cli foo qux",
+//     the "foo" command will be executed with the arg "qux". It is up to
+//     you to handle these args. One option is to just return the special
+//     help return code `RunResultHelp` to display help and exit.
+//
+//   * The help flag "-h" or "-help" will look at all args to determine
+//     the help function. For example: "otto apps list -h" will show the
+//     help for "apps list" but "otto apps -h" will show it for "apps".
+//     In the normal CLI, only the first subcommand is used.
+//
+//   * The help flag will list any subcommands that a command takes
+//     as well as the command's help itself. If there are no subcommands,
+//     it will note this. If the CLI itself has no subcommands, this entire
+//     section is omitted.
+//
+//   * Any parent commands that don't exist are automatically created as
+//     no-op commands that just show help for other subcommands. For example,
+//     if you only register "foo bar", then "foo" is automatically created.
+//
+type CLI struct {
+	// Args is the list of command-line arguments received excluding
+	// the name of the app. For example, if the command "./cli foo bar"
+	// was invoked, then Args should be []string{"foo", "bar"}.
+	Args []string
+
+	// Commands is a mapping of subcommand names to a factory function
+	// for creating that Command implementation. If there is a command
+	// with a blank string "", then it will be used as the default command
+	// if no subcommand is specified.
+	//
+	// If the key has a space in it, this will create a nested subcommand.
+	// For example, if the key is "foo bar", then to access it our CLI
+	// must be accessed with "./cli foo bar". See the docs for CLI for
+	// notes on how this changes some other behavior of the CLI as well.
+	//
+	// The factory should be as cheap as possible, ideally only allocating
+	// a struct. The factory may be called multiple times in the course
+	// of a command execution and certain events such as help require the
+	// instantiation of all commands. Expensive initialization should be
+	// deferred to function calls within the interface implementation.
+	Commands map[string]CommandFactory
+
+	// HiddenCommands is a list of commands that are "hidden". Hidden
+	// commands are not given to the help function callback and do not
+	// show up in autocomplete. The values in the slice should be equivalent
+	// to the keys in the command map.
+	HiddenCommands []string
+
+	// Name defines the name of the CLI.
+	Name string
+
+	// Version of the CLI.
+	Version string
+
+	// Autocomplete enables or disables subcommand auto-completion support.
+	// This is enabled by default when NewCLI is called. Otherwise, this
+	// must enabled explicitly.
+	//
+	// Autocomplete requires the "Name" option to be set on CLI. This name
+	// should be set exactly to the binary name that is autocompleted.
+	//
+	// Autocompletion is supported via the github.com/posener/complete
+	// library. This library supports both bash and zsh. To add support
+	// for other shells, please see that library.
+	//
+	// AutocompleteInstall and AutocompleteUninstall are the global flag
+	// names for installing and uninstalling the autocompletion handlers
+	// for the user's shell. The flag should omit the hyphen(s) in front of
+	// the value. Both single and double hyphens will automatically be supported
+	// for the flag name. These default to `autocomplete-install` and
+	// `autocomplete-uninstall` respectively.
+	//
+	// AutocompleteNoDefaultFlags is a boolean which controls if the default auto-
+	// complete flags like -help and -version are added to the output.
+	//
+	// AutocompleteGlobalFlags are a mapping of global flags for
+	// autocompletion. The help and version flags are automatically added.
+	Autocomplete               bool
+	AutocompleteInstall        string
+	AutocompleteUninstall      string
+	AutocompleteNoDefaultFlags bool
+	AutocompleteGlobalFlags    complete.Flags
+	autocompleteInstaller      autocompleteInstaller // For tests
+
+	// HelpFunc and HelpWriter are used to output help information, if
+	// requested.
+	//
+	// HelpFunc is the function called to generate the generic help
+	// text that is shown if help must be shown for the CLI that doesn't
+	// pertain to a specific command.
+	//
+	// HelpWriter is the Writer where the help text is outputted to. If
+	// not specified, it will default to Stderr.
+	HelpFunc   HelpFunc
+	HelpWriter io.Writer
+
+	//---------------------------------------------------------------
+	// Internal fields set automatically
+
+	once           sync.Once
+	autocomplete   *complete.Complete
+	commandTree    *radix.Tree
+	commandNested  bool
+	commandHidden  map[string]struct{}
+	subcommand     string
+	subcommandArgs []string
+	topFlags       []string
+
+	// These are true when special global flags are set. We can/should
+	// probably use a bitset for this one day.
+	isHelp                  bool
+	isVersion               bool
+	isAutocompleteInstall   bool
+	isAutocompleteUninstall bool
+}
+
+// NewClI returns a new CLI instance with sensible defaults.
+func NewCLI(app, version string) *CLI {
+	return &CLI{
+		Name:         app,
+		Version:      version,
+		HelpFunc:     BasicHelpFunc(app),
+		Autocomplete: true,
+	}
+
+}
+
+// IsHelp returns whether or not the help flag is present within the
+// arguments.
+func (c *CLI) IsHelp() bool {
+	c.once.Do(c.init)
+	return c.isHelp
+}
+
+// IsVersion returns whether or not the version flag is present within the
+// arguments.
+func (c *CLI) IsVersion() bool {
+	c.once.Do(c.init)
+	return c.isVersion
+}
+
+// Run runs the actual CLI based on the arguments given.
+func (c *CLI) Run() (int, error) {
+	c.once.Do(c.init)
+
+	// If this is a autocompletion request, satisfy it. This must be called
+	// first before anything else since its possible to be autocompleting
+	// -help or -version or other flags and we want to show completions
+	// and not actually write the help or version.
+	if c.Autocomplete && c.autocomplete.Complete() {
+		return 0, nil
+	}
+
+	// Just show the version and exit if instructed.
+	if c.IsVersion() && c.Version != "" {
+		c.HelpWriter.Write([]byte(c.Version + "\n"))
+		return 0, nil
+	}
+
+	// Just print the help when only '-h' or '--help' is passed.
+	if c.IsHelp() && c.Subcommand() == "" {
+		c.HelpWriter.Write([]byte(c.HelpFunc(c.helpCommands(c.Subcommand())) + "\n"))
+		return 0, nil
+	}
+
+	// If we're attempting to install or uninstall autocomplete then handle
+	if c.Autocomplete {
+		// Autocomplete requires the "Name" to be set so that we know what
+		// command to setup the autocomplete on.
+		if c.Name == "" {
+			return 1, fmt.Errorf(
+				"internal error: CLI.Name must be specified for autocomplete to work")
+		}
+
+		// If both install and uninstall flags are specified, then error
+		if c.isAutocompleteInstall && c.isAutocompleteUninstall {
+			return 1, fmt.Errorf(
+				"Either the autocomplete install or uninstall flag may " +
+					"be specified, but not both.")
+		}
+
+		// If the install flag is specified, perform the install or uninstall
+		if c.isAutocompleteInstall {
+			if err := c.autocompleteInstaller.Install(c.Name); err != nil {
+				return 1, err
+			}
+
+			return 0, nil
+		}
+
+		if c.isAutocompleteUninstall {
+			if err := c.autocompleteInstaller.Uninstall(c.Name); err != nil {
+				return 1, err
+			}
+
+			return 0, nil
+		}
+	}
+
+	// Attempt to get the factory function for creating the command
+	// implementation. If the command is invalid or blank, it is an error.
+	raw, ok := c.commandTree.Get(c.Subcommand())
+	if !ok {
+		c.HelpWriter.Write([]byte(c.HelpFunc(c.helpCommands(c.subcommandParent())) + "\n"))
+		return 127, nil
+	}
+
+	command, err := raw.(CommandFactory)()
+	if err != nil {
+		return 1, err
+	}
+
+	// If we've been instructed to just print the help, then print it
+	if c.IsHelp() {
+		c.commandHelp(command)
+		return 0, nil
+	}
+
+	// If there is an invalid flag, then error
+	if len(c.topFlags) > 0 {
+		c.HelpWriter.Write([]byte(
+			"Invalid flags before the subcommand. If these flags are for\n" +
+				"the subcommand, please put them after the subcommand.\n\n"))
+		c.commandHelp(command)
+		return 1, nil
+	}
+
+	code := command.Run(c.SubcommandArgs())
+	if code == RunResultHelp {
+		// Requesting help
+		c.commandHelp(command)
+		return 1, nil
+	}
+
+	return code, nil
+}
+
+// Subcommand returns the subcommand that the CLI would execute. For
+// example, a CLI from "--version version --help" would return a Subcommand
+// of "version"
+func (c *CLI) Subcommand() string {
+	c.once.Do(c.init)
+	return c.subcommand
+}
+
+// SubcommandArgs returns the arguments that will be passed to the
+// subcommand.
+func (c *CLI) SubcommandArgs() []string {
+	c.once.Do(c.init)
+	return c.subcommandArgs
+}
+
+// subcommandParent returns the parent of this subcommand, if there is one.
+// If there isn't on, "" is returned.
+func (c *CLI) subcommandParent() string {
+	// Get the subcommand, if it is "" alread just return
+	sub := c.Subcommand()
+	if sub == "" {
+		return sub
+	}
+
+	// Clear any trailing spaces and find the last space
+	sub = strings.TrimRight(sub, " ")
+	idx := strings.LastIndex(sub, " ")
+
+	if idx == -1 {
+		// No space means our parent is root
+		return ""
+	}
+
+	return sub[:idx]
+}
+
+func (c *CLI) init() {
+	if c.HelpFunc == nil {
+		c.HelpFunc = BasicHelpFunc("app")
+
+		if c.Name != "" {
+			c.HelpFunc = BasicHelpFunc(c.Name)
+		}
+	}
+
+	if c.HelpWriter == nil {
+		c.HelpWriter = os.Stderr
+	}
+
+	// Build our hidden commands
+	if len(c.HiddenCommands) > 0 {
+		c.commandHidden = make(map[string]struct{})
+		for _, h := range c.HiddenCommands {
+			c.commandHidden[h] = struct{}{}
+		}
+	}
+
+	// Build our command tree
+	c.commandTree = radix.New()
+	c.commandNested = false
+	for k, v := range c.Commands {
+		k = strings.TrimSpace(k)
+		c.commandTree.Insert(k, v)
+		if strings.ContainsRune(k, ' ') {
+			c.commandNested = true
+		}
+	}
+
+	// Go through the key and fill in any missing parent commands
+	if c.commandNested {
+		var walkFn radix.WalkFn
+		toInsert := make(map[string]struct{})
+		walkFn = func(k string, raw interface{}) bool {
+			idx := strings.LastIndex(k, " ")
+			if idx == -1 {
+				// If there is no space, just ignore top level commands
+				return false
+			}
+
+			// Trim up to that space so we can get the expected parent
+			k = k[:idx]
+			if _, ok := c.commandTree.Get(k); ok {
+				// Yay we have the parent!
+				return false
+			}
+
+			// We're missing the parent, so let's insert this
+			toInsert[k] = struct{}{}
+
+			// Call the walk function recursively so we check this one too
+			return walkFn(k, nil)
+		}
+
+		// Walk!
+		c.commandTree.Walk(walkFn)
+
+		// Insert any that we're missing
+		for k := range toInsert {
+			var f CommandFactory = func() (Command, error) {
+				return &MockCommand{
+					HelpText:  "This command is accessed by using one of the subcommands below.",
+					RunResult: RunResultHelp,
+				}, nil
+			}
+
+			c.commandTree.Insert(k, f)
+		}
+	}
+
+	// Setup autocomplete if we have it enabled. We have to do this after
+	// the command tree is setup so we can use the radix tree to easily find
+	// all subcommands.
+	if c.Autocomplete {
+		c.initAutocomplete()
+	}
+
+	// Process the args
+	c.processArgs()
+}
+
+func (c *CLI) initAutocomplete() {
+	if c.AutocompleteInstall == "" {
+		c.AutocompleteInstall = defaultAutocompleteInstall
+	}
+
+	if c.AutocompleteUninstall == "" {
+		c.AutocompleteUninstall = defaultAutocompleteUninstall
+	}
+
+	if c.autocompleteInstaller == nil {
+		c.autocompleteInstaller = &realAutocompleteInstaller{}
+	}
+
+	// Build the root command
+	cmd := c.initAutocompleteSub("")
+
+	// For the root, we add the global flags to the "Flags". This way
+	// they don't show up on every command.
+	if !c.AutocompleteNoDefaultFlags {
+		cmd.Flags = map[string]complete.Predictor{
+			"-" + c.AutocompleteInstall:   complete.PredictNothing,
+			"-" + c.AutocompleteUninstall: complete.PredictNothing,
+			"-help":    complete.PredictNothing,
+			"-version": complete.PredictNothing,
+		}
+	}
+	cmd.GlobalFlags = c.AutocompleteGlobalFlags
+
+	c.autocomplete = complete.New(c.Name, cmd)
+}
+
+// initAutocompleteSub creates the complete.Command for a subcommand with
+// the given prefix. This will continue recursively for all subcommands.
+// The prefix "" (empty string) can be used for the root command.
+func (c *CLI) initAutocompleteSub(prefix string) complete.Command {
+	var cmd complete.Command
+	walkFn := func(k string, raw interface{}) bool {
+		// Keep track of the full key so that we can nest further if necessary
+		fullKey := k
+
+		if len(prefix) > 0 {
+			// If we have a prefix, trim the prefix + 1 (for the space)
+			// Example: turns "sub one" to "one" with prefix "sub"
+			k = k[len(prefix)+1:]
+		}
+
+		if idx := strings.Index(k, " "); idx >= 0 {
+			// If there is a space, we trim up to the space. This turns
+			// "sub sub2 sub3" into "sub". The prefix trim above will
+			// trim our current depth properly.
+			k = k[:idx]
+		}
+
+		if _, ok := cmd.Sub[k]; ok {
+			// If we already tracked this subcommand then ignore
+			return false
+		}
+
+		// If the command is hidden, don't record it at all
+		if _, ok := c.commandHidden[fullKey]; ok {
+			return false
+		}
+
+		if cmd.Sub == nil {
+			cmd.Sub = complete.Commands(make(map[string]complete.Command))
+		}
+		subCmd := c.initAutocompleteSub(fullKey)
+
+		// Instantiate the command so that we can check if the command is
+		// a CommandAutocomplete implementation. If there is an error
+		// creating the command, we just ignore it since that will be caught
+		// later.
+		impl, err := raw.(CommandFactory)()
+		if err != nil {
+			impl = nil
+		}
+
+		// Check if it implements ComandAutocomplete. If so, setup the autocomplete
+		if c, ok := impl.(CommandAutocomplete); ok {
+			subCmd.Args = c.AutocompleteArgs()
+			subCmd.Flags = c.AutocompleteFlags()
+		}
+
+		cmd.Sub[k] = subCmd
+		return false
+	}
+
+	walkPrefix := prefix
+	if walkPrefix != "" {
+		walkPrefix += " "
+	}
+
+	c.commandTree.WalkPrefix(walkPrefix, walkFn)
+	return cmd
+}
+
+func (c *CLI) commandHelp(command Command) {
+	// Get the template to use
+	tpl := strings.TrimSpace(defaultHelpTemplate)
+	if t, ok := command.(CommandHelpTemplate); ok {
+		tpl = t.HelpTemplate()
+	}
+	if !strings.HasSuffix(tpl, "\n") {
+		tpl += "\n"
+	}
+
+	// Parse it
+	t, err := template.New("root").Parse(tpl)
+	if err != nil {
+		t = template.Must(template.New("root").Parse(fmt.Sprintf(
+			"Internal error! Failed to parse command help template: %s\n", err)))
+	}
+
+	// Template data
+	data := map[string]interface{}{
+		"Name": c.Name,
+		"Help": command.Help(),
+	}
+
+	// Build subcommand list if we have it
+	var subcommandsTpl []map[string]interface{}
+	if c.commandNested {
+		// Get the matching keys
+		subcommands := c.helpCommands(c.Subcommand())
+		keys := make([]string, 0, len(subcommands))
+		for k := range subcommands {
+			keys = append(keys, k)
+		}
+
+		// Sort the keys
+		sort.Strings(keys)
+
+		// Figure out the padding length
+		var longest int
+		for _, k := range keys {
+			if v := len(k); v > longest {
+				longest = v
+			}
+		}
+
+		// Go through and create their structures
+		subcommandsTpl = make([]map[string]interface{}, 0, len(subcommands))
+		for _, k := range keys {
+			// Get the command
+			raw, ok := subcommands[k]
+			if !ok {
+				c.HelpWriter.Write([]byte(fmt.Sprintf(
+					"Error getting subcommand %q", k)))
+			}
+			sub, err := raw()
+			if err != nil {
+				c.HelpWriter.Write([]byte(fmt.Sprintf(
+					"Error instantiating %q: %s", k, err)))
+			}
+
+			// Find the last space and make sure we only include that last part
+			name := k
+			if idx := strings.LastIndex(k, " "); idx > -1 {
+				name = name[idx+1:]
+			}
+
+			subcommandsTpl = append(subcommandsTpl, map[string]interface{}{
+				"Name":        name,
+				"NameAligned": name + strings.Repeat(" ", longest-len(k)),
+				"Help":        sub.Help(),
+				"Synopsis":    sub.Synopsis(),
+			})
+		}
+	}
+	data["Subcommands"] = subcommandsTpl
+
+	// Write
+	err = t.Execute(c.HelpWriter, data)
+	if err == nil {
+		return
+	}
+
+	// An error, just output...
+	c.HelpWriter.Write([]byte(fmt.Sprintf(
+		"Internal error rendering help: %s", err)))
+}
+
+// helpCommands returns the subcommands for the HelpFunc argument.
+// This will only contain immediate subcommands.
+func (c *CLI) helpCommands(prefix string) map[string]CommandFactory {
+	// If our prefix isn't empty, make sure it ends in ' '
+	if prefix != "" && prefix[len(prefix)-1] != ' ' {
+		prefix += " "
+	}
+
+	// Get all the subkeys of this command
+	var keys []string
+	c.commandTree.WalkPrefix(prefix, func(k string, raw interface{}) bool {
+		// Ignore any sub-sub keys, i.e. "foo bar baz" when we want "foo bar"
+		if !strings.Contains(k[len(prefix):], " ") {
+			keys = append(keys, k)
+		}
+
+		return false
+	})
+
+	// For each of the keys return that in the map
+	result := make(map[string]CommandFactory, len(keys))
+	for _, k := range keys {
+		raw, ok := c.commandTree.Get(k)
+		if !ok {
+			// We just got it via WalkPrefix above, so we just panic
+			panic("not found: " + k)
+		}
+
+		// If this is a hidden command, don't show it
+		if _, ok := c.commandHidden[k]; ok {
+			continue
+		}
+
+		result[k] = raw.(CommandFactory)
+	}
+
+	return result
+}
+
+func (c *CLI) processArgs() {
+	for i, arg := range c.Args {
+		if arg == "--" {
+			break
+		}
+
+		// Check for help flags.
+		if arg == "-h" || arg == "-help" || arg == "--help" {
+			c.isHelp = true
+			continue
+		}
+
+		// Check for autocomplete flags
+		if c.Autocomplete {
+			if arg == "-"+c.AutocompleteInstall || arg == "--"+c.AutocompleteInstall {
+				c.isAutocompleteInstall = true
+				continue
+			}
+
+			if arg == "-"+c.AutocompleteUninstall || arg == "--"+c.AutocompleteUninstall {
+				c.isAutocompleteUninstall = true
+				continue
+			}
+		}
+
+		if c.subcommand == "" {
+			// Check for version flags if not in a subcommand.
+			if arg == "-v" || arg == "-version" || arg == "--version" {
+				c.isVersion = true
+				continue
+			}
+
+			if arg != "" && arg[0] == '-' {
+				// Record the arg...
+				c.topFlags = append(c.topFlags, arg)
+			}
+		}
+
+		// If we didn't find a subcommand yet and this is the first non-flag
+		// argument, then this is our subcommand.
+		if c.subcommand == "" && arg != "" && arg[0] != '-' {
+			c.subcommand = arg
+			if c.commandNested {
+				// Nested CLI, the subcommand is actually the entire
+				// arg list up to a flag that is still a valid subcommand.
+				searchKey := strings.Join(c.Args[i:], " ")
+				k, _, ok := c.commandTree.LongestPrefix(searchKey)
+				if ok {
+					// k could be a prefix that doesn't contain the full
+					// command such as "foo" instead of "foobar", so we
+					// need to verify that we have an entire key. To do that,
+					// we look for an ending in a space or an end of string.
+					reVerify := regexp.MustCompile(regexp.QuoteMeta(k) + `( |$)`)
+					if reVerify.MatchString(searchKey) {
+						c.subcommand = k
+						i += strings.Count(k, " ")
+					}
+				}
+			}
+
+			// The remaining args the subcommand arguments
+			c.subcommandArgs = c.Args[i+1:]
+		}
+	}
+
+	// If we never found a subcommand and support a default command, then
+	// switch to using that.
+	if c.subcommand == "" {
+		if _, ok := c.Commands[""]; ok {
+			args := c.topFlags
+			args = append(args, c.subcommandArgs...)
+			c.topFlags = nil
+			c.subcommandArgs = args
+		}
+	}
+}
+
+// defaultAutocompleteInstall and defaultAutocompleteUninstall are the
+// default values for the autocomplete install and uninstall flags.
+const defaultAutocompleteInstall = "autocomplete-install"
+const defaultAutocompleteUninstall = "autocomplete-uninstall"
+
+const defaultHelpTemplate = `
+{{.Help}}{{if gt (len .Subcommands) 0}}
+
+Subcommands:
+{{- range $value := .Subcommands }}
+    {{ $value.NameAligned }}    {{ $value.Synopsis }}{{ end }}
+{{- end }}
+`

vendor/github.com/mitchellh/cli/command.go

@@ -0,0 +1,67 @@
+package cli
+
+import (
+	"github.com/posener/complete"
+)
+
+const (
+	// RunResultHelp is a value that can be returned from Run to signal
+	// to the CLI to render the help output.
+	RunResultHelp = -18511
+)
+
+// A command is a runnable sub-command of a CLI.
+type Command interface {
+	// Help should return long-form help text that includes the command-line
+	// usage, a brief few sentences explaining the function of the command,
+	// and the complete list of flags the command accepts.
+	Help() string
+
+	// Run should run the actual command with the given CLI instance and
+	// command-line arguments. It should return the exit status when it is
+	// finished.
+	//
+	// There are a handful of special exit codes this can return documented
+	// above that change behavior.
+	Run(args []string) int
+
+	// Synopsis should return a one-line, short synopsis of the command.
+	// This should be less than 50 characters ideally.
+	Synopsis() string
+}
+
+// CommandAutocomplete is an extension of Command that enables fine-grained
+// autocompletion. Subcommand autocompletion will work even if this interface
+// is not implemented. By implementing this interface, more advanced
+// autocompletion is enabled.
+type CommandAutocomplete interface {
+	// AutocompleteArgs returns the argument predictor for this command.
+	// If argument completion is not supported, this should return
+	// complete.PredictNothing.
+	AutocompleteArgs() complete.Predictor
+
+	// AutocompleteFlags returns a mapping of supported flags and autocomplete
+	// options for this command. The map key for the Flags map should be the
+	// complete flag such as "-foo" or "--foo".
+	AutocompleteFlags() complete.Flags
+}
+
+// CommandHelpTemplate is an extension of Command that also has a function
+// for returning a template for the help rather than the help itself. In
+// this scenario, both Help and HelpTemplate should be implemented.
+//
+// If CommandHelpTemplate isn't implemented, the Help is output as-is.
+type CommandHelpTemplate interface {
+	// HelpTemplate is the template in text/template format to use for
+	// displaying the Help. The keys available are:
+	//
+	//   * ".Help" - The help text itself
+	//   * ".Subcommands"
+	//
+	HelpTemplate() string
+}
+
+// CommandFactory is a type of function that is a factory for commands.
+// We need a factory because we may need to setup some state on the
+// struct that implements the command itself.
+type CommandFactory func() (Command, error)

vendor/github.com/mitchellh/cli/command_mock.go

@@ -0,0 +1,63 @@
+package cli
+
+import (
+	"github.com/posener/complete"
+)
+
+// MockCommand is an implementation of Command that can be used for tests.
+// It is publicly exported from this package in case you want to use it
+// externally.
+type MockCommand struct {
+	// Settable
+	HelpText     string
+	RunResult    int
+	SynopsisText string
+
+	// Set by the command
+	RunCalled bool
+	RunArgs   []string
+}
+
+func (c *MockCommand) Help() string {
+	return c.HelpText
+}
+
+func (c *MockCommand) Run(args []string) int {
+	c.RunCalled = true
+	c.RunArgs = args
+
+	return c.RunResult
+}
+
+func (c *MockCommand) Synopsis() string {
+	return c.SynopsisText
+}
+
+// MockCommandAutocomplete is an implementation of CommandAutocomplete.
+type MockCommandAutocomplete struct {
+	MockCommand
+
+	// Settable
+	AutocompleteArgsValue  complete.Predictor
+	AutocompleteFlagsValue complete.Flags
+}
+
+func (c *MockCommandAutocomplete) AutocompleteArgs() complete.Predictor {
+	return c.AutocompleteArgsValue
+}
+
+func (c *MockCommandAutocomplete) AutocompleteFlags() complete.Flags {
+	return c.AutocompleteFlagsValue
+}
+
+// MockCommandHelpTemplate is an implementation of CommandHelpTemplate.
+type MockCommandHelpTemplate struct {
+	MockCommand
+
+	// Settable
+	HelpTemplateText string
+}
+
+func (c *MockCommandHelpTemplate) HelpTemplate() string {
+	return c.HelpTemplateText
+}

vendor/github.com/mitchellh/cli/help.go

@@ -0,0 +1,79 @@
+package cli
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"sort"
+	"strings"
+)
+
+// HelpFunc is the type of the function that is responsible for generating
+// the help output when the CLI must show the general help text.
+type HelpFunc func(map[string]CommandFactory) string
+
+// BasicHelpFunc generates some basic help output that is usually good enough
+// for most CLI applications.
+func BasicHelpFunc(app string) HelpFunc {
+	return func(commands map[string]CommandFactory) string {
+		var buf bytes.Buffer
+		buf.WriteString(fmt.Sprintf(
+			"Usage: %s [--version] [--help] <command> [<args>]\n\n",
+			app))
+		buf.WriteString("Available commands are:\n")
+
+		// Get the list of keys so we can sort them, and also get the maximum
+		// key length so they can be aligned properly.
+		keys := make([]string, 0, len(commands))
+		maxKeyLen := 0
+		for key := range commands {
+			if len(key) > maxKeyLen {
+				maxKeyLen = len(key)
+			}
+
+			keys = append(keys, key)
+		}
+		sort.Strings(keys)
+
+		for _, key := range keys {
+			commandFunc, ok := commands[key]
+			if !ok {
+				// This should never happen since we JUST built the list of
+				// keys.
+				panic("command not found: " + key)
+			}
+
+			command, err := commandFunc()
+			if err != nil {
+				log.Printf("[ERR] cli: Command '%s' failed to load: %s",
+					key, err)
+				continue
+			}
+
+			key = fmt.Sprintf("%s%s", key, strings.Repeat(" ", maxKeyLen-len(key)))
+			buf.WriteString(fmt.Sprintf("    %s    %s\n", key, command.Synopsis()))
+		}
+
+		return buf.String()
+	}
+}
+
+// FilteredHelpFunc will filter the commands to only include the keys
+// in the include parameter.
+func FilteredHelpFunc(include []string, f HelpFunc) HelpFunc {
+	return func(commands map[string]CommandFactory) string {
+		set := make(map[string]struct{})
+		for _, k := range include {
+			set[k] = struct{}{}
+		}
+
+		filtered := make(map[string]CommandFactory)
+		for k, f := range commands {
+			if _, ok := set[k]; ok {
+				filtered[k] = f
+			}
+		}
+
+		return f(filtered)
+	}
+}

vendor/github.com/mitchellh/cli/ui.go

@@ -0,0 +1,187 @@
+package cli
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"os/signal"
+	"strings"
+
+	"github.com/bgentry/speakeasy"
+	"github.com/mattn/go-isatty"
+)
+
+// Ui is an interface for interacting with the terminal, or "interface"
+// of a CLI. This abstraction doesn't have to be used, but helps provide
+// a simple, layerable way to manage user interactions.
+type Ui interface {
+	// Ask asks the user for input using the given query. The response is
+	// returned as the given string, or an error.
+	Ask(string) (string, error)
+
+	// AskSecret asks the user for input using the given query, but does not echo
+	// the keystrokes to the terminal.
+	AskSecret(string) (string, error)
+
+	// Output is called for normal standard output.
+	Output(string)
+
+	// Info is called for information related to the previous output.
+	// In general this may be the exact same as Output, but this gives
+	// Ui implementors some flexibility with output formats.
+	Info(string)
+
+	// Error is used for any error messages that might appear on standard
+	// error.
+	Error(string)
+
+	// Warn is used for any warning messages that might appear on standard
+	// error.
+	Warn(string)
+}
+
+// BasicUi is an implementation of Ui that just outputs to the given
+// writer. This UI is not threadsafe by default, but you can wrap it
+// in a ConcurrentUi to make it safe.
+type BasicUi struct {
+	Reader      io.Reader
+	Writer      io.Writer
+	ErrorWriter io.Writer
+}
+
+func (u *BasicUi) Ask(query string) (string, error) {
+	return u.ask(query, false)
+}
+
+func (u *BasicUi) AskSecret(query string) (string, error) {
+	return u.ask(query, true)
+}
+
+func (u *BasicUi) ask(query string, secret bool) (string, error) {
+	if _, err := fmt.Fprint(u.Writer, query+" "); err != nil {
+		return "", err
+	}
+
+	// Register for interrupts so that we can catch it and immediately
+	// return...
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(sigCh, os.Interrupt)
+	defer signal.Stop(sigCh)
+
+	// Ask for input in a go-routine so that we can ignore it.
+	errCh := make(chan error, 1)
+	lineCh := make(chan string, 1)
+	go func() {
+		var line string
+		var err error
+		if secret && isatty.IsTerminal(os.Stdin.Fd()) {
+			line, err = speakeasy.Ask("")
+		} else {
+			r := bufio.NewReader(u.Reader)
+			line, err = r.ReadString('\n')
+		}
+		if err != nil {
+			errCh <- err
+			return
+		}
+
+		lineCh <- strings.TrimRight(line, "\r\n")
+	}()
+
+	select {
+	case err := <-errCh:
+		return "", err
+	case line := <-lineCh:
+		return line, nil
+	case <-sigCh:
+		// Print a newline so that any further output starts properly
+		// on a new line.
+		fmt.Fprintln(u.Writer)
+
+		return "", errors.New("interrupted")
+	}
+}
+
+func (u *BasicUi) Error(message string) {
+	w := u.Writer
+	if u.ErrorWriter != nil {
+		w = u.ErrorWriter
+	}
+
+	fmt.Fprint(w, message)
+	fmt.Fprint(w, "\n")
+}
+
+func (u *BasicUi) Info(message string) {
+	u.Output(message)
+}
+
+func (u *BasicUi) Output(message string) {
+	fmt.Fprint(u.Writer, message)
+	fmt.Fprint(u.Writer, "\n")
+}
+
+func (u *BasicUi) Warn(message string) {
+	u.Error(message)
+}
+
+// PrefixedUi is an implementation of Ui that prefixes messages.
+type PrefixedUi struct {
+	AskPrefix       string
+	AskSecretPrefix string
+	OutputPrefix    string
+	InfoPrefix      string
+	ErrorPrefix     string
+	WarnPrefix      string
+	Ui              Ui
+}
+
+func (u *PrefixedUi) Ask(query string) (string, error) {
+	if query != "" {
+		query = fmt.Sprintf("%s%s", u.AskPrefix, query)
+	}
+
+	return u.Ui.Ask(query)
+}
+
+func (u *PrefixedUi) AskSecret(query string) (string, error) {
+	if query != "" {
+		query = fmt.Sprintf("%s%s", u.AskSecretPrefix, query)
+	}
+
+	return u.Ui.AskSecret(query)
+}
+
+func (u *PrefixedUi) Error(message string) {
+	if message != "" {
+		message = fmt.Sprintf("%s%s", u.ErrorPrefix, message)
+	}
+
+	u.Ui.Error(message)
+}
+
+func (u *PrefixedUi) Info(message string) {
+	if message != "" {
+		message = fmt.Sprintf("%s%s", u.InfoPrefix, message)
+	}
+
+	u.Ui.Info(message)
+}
+
+func (u *PrefixedUi) Output(message string) {
+	if message != "" {
+		message = fmt.Sprintf("%s%s", u.OutputPrefix, message)
+	}
+
+	u.Ui.Output(message)
+}
+
+func (u *PrefixedUi) Warn(message string) {
+	if message != "" {
+		message = fmt.Sprintf("%s%s", u.WarnPrefix, message)
+	}
+
+	u.Ui.Warn(message)
+}

vendor/github.com/mitchellh/cli/ui_colored.go

@@ -0,0 +1,69 @@
+package cli
+
+import (
+	"fmt"
+)
+
+// UiColor is a posix shell color code to use.
+type UiColor struct {
+	Code int
+	Bold bool
+}
+
+// A list of colors that are useful. These are all non-bolded by default.
+var (
+	UiColorNone    UiColor = UiColor{-1, false}
+	UiColorRed             = UiColor{31, false}
+	UiColorGreen           = UiColor{32, false}
+	UiColorYellow          = UiColor{33, false}
+	UiColorBlue            = UiColor{34, false}
+	UiColorMagenta         = UiColor{35, false}
+	UiColorCyan            = UiColor{36, false}
+)
+
+// ColoredUi is a Ui implementation that colors its output according
+// to the given color schemes for the given type of output.
+type ColoredUi struct {
+	OutputColor UiColor
+	InfoColor   UiColor
+	ErrorColor  UiColor
+	WarnColor   UiColor
+	Ui          Ui
+}
+
+func (u *ColoredUi) Ask(query string) (string, error) {
+	return u.Ui.Ask(u.colorize(query, u.OutputColor))
+}
+
+func (u *ColoredUi) AskSecret(query string) (string, error) {
+	return u.Ui.AskSecret(u.colorize(query, u.OutputColor))
+}
+
+func (u *ColoredUi) Output(message string) {
+	u.Ui.Output(u.colorize(message, u.OutputColor))
+}
+
+func (u *ColoredUi) Info(message string) {
+	u.Ui.Info(u.colorize(message, u.InfoColor))
+}
+
+func (u *ColoredUi) Error(message string) {
+	u.Ui.Error(u.colorize(message, u.ErrorColor))
+}
+
+func (u *ColoredUi) Warn(message string) {
+	u.Ui.Warn(u.colorize(message, u.WarnColor))
+}
+
+func (u *ColoredUi) colorize(message string, color UiColor) string {
+	if color.Code == -1 {
+		return message
+	}
+
+	attr := 0
+	if color.Bold {
+		attr = 1
+	}
+
+	return fmt.Sprintf("\033[%d;%dm%s\033[0m", attr, color.Code, message)
+}

vendor/github.com/mitchellh/cli/ui_concurrent.go

@@ -0,0 +1,54 @@
+package cli
+
+import (
+	"sync"
+)
+
+// ConcurrentUi is a wrapper around a Ui interface (and implements that
+// interface) making the underlying Ui concurrency safe.
+type ConcurrentUi struct {
+	Ui Ui
+	l  sync.Mutex
+}
+
+func (u *ConcurrentUi) Ask(query string) (string, error) {
+	u.l.Lock()
+	defer u.l.Unlock()
+
+	return u.Ui.Ask(query)
+}
+
+func (u *ConcurrentUi) AskSecret(query string) (string, error) {
+	u.l.Lock()
+	defer u.l.Unlock()
+
+	return u.Ui.AskSecret(query)
+}
+
+func (u *ConcurrentUi) Error(message string) {
+	u.l.Lock()
+	defer u.l.Unlock()
+
+	u.Ui.Error(message)
+}
+
+func (u *ConcurrentUi) Info(message string) {
+	u.l.Lock()
+	defer u.l.Unlock()
+
+	u.Ui.Info(message)
+}
+
+func (u *ConcurrentUi) Output(message string) {
+	u.l.Lock()
+	defer u.l.Unlock()
+
+	u.Ui.Output(message)
+}
+
+func (u *ConcurrentUi) Warn(message string) {
+	u.l.Lock()
+	defer u.l.Unlock()
+
+	u.Ui.Warn(message)
+}

vendor/github.com/mitchellh/cli/ui_mock.go

@@ -0,0 +1,111 @@
+package cli
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"sync"
+)
+
+// NewMockUi returns a fully initialized MockUi instance
+// which is safe for concurrent use.
+func NewMockUi() *MockUi {
+	m := new(MockUi)
+	m.once.Do(m.init)
+	return m
+}
+
+// MockUi is a mock UI that is used for tests and is exported publicly
+// for use in external tests if needed as well. Do not instantite this
+// directly since the buffers will be initialized on the first write. If
+// there is no write then you will get a nil panic. Please use the
+// NewMockUi() constructor function instead. You can fix your code with
+//
+//  sed -i -e 's/new(cli.MockUi)/cli.NewMockUi()/g' *_test.go
+type MockUi struct {
+	InputReader  io.Reader
+	ErrorWriter  *syncBuffer
+	OutputWriter *syncBuffer
+
+	once sync.Once
+}
+
+func (u *MockUi) Ask(query string) (string, error) {
+	u.once.Do(u.init)
+
+	var result string
+	fmt.Fprint(u.OutputWriter, query)
+	if _, err := fmt.Fscanln(u.InputReader, &result); err != nil {
+		return "", err
+	}
+
+	return result, nil
+}
+
+func (u *MockUi) AskSecret(query string) (string, error) {
+	return u.Ask(query)
+}
+
+func (u *MockUi) Error(message string) {
+	u.once.Do(u.init)
+
+	fmt.Fprint(u.ErrorWriter, message)
+	fmt.Fprint(u.ErrorWriter, "\n")
+}
+
+func (u *MockUi) Info(message string) {
+	u.Output(message)
+}
+
+func (u *MockUi) Output(message string) {
+	u.once.Do(u.init)
+
+	fmt.Fprint(u.OutputWriter, message)
+	fmt.Fprint(u.OutputWriter, "\n")
+}
+
+func (u *MockUi) Warn(message string) {
+	u.once.Do(u.init)
+
+	fmt.Fprint(u.ErrorWriter, message)
+	fmt.Fprint(u.ErrorWriter, "\n")
+}
+
+func (u *MockUi) init() {
+	u.ErrorWriter = new(syncBuffer)
+	u.OutputWriter = new(syncBuffer)
+}
+
+type syncBuffer struct {
+	sync.RWMutex
+	b bytes.Buffer
+}
+
+func (b *syncBuffer) Write(data []byte) (int, error) {
+	b.Lock()
+	defer b.Unlock()
+	return b.b.Write(data)
+}
+
+func (b *syncBuffer) Read(data []byte) (int, error) {
+	b.RLock()
+	defer b.RUnlock()
+	return b.b.Read(data)
+}
+
+func (b *syncBuffer) Reset() {
+	b.Lock()
+	b.b.Reset()
+	b.Unlock()
+}
+
+func (b *syncBuffer) String() string {
+	return string(b.Bytes())
+}
+
+func (b *syncBuffer) Bytes() []byte {
+	b.RLock()
+	data := b.b.Bytes()
+	b.RUnlock()
+	return data
+}

vendor/github.com/mitchellh/cli/ui_writer.go

@@ -0,0 +1,18 @@
+package cli
+
+// UiWriter is an io.Writer implementation that can be used with
+// loggers that writes every line of log output data to a Ui at the
+// Info level.
+type UiWriter struct {
+	Ui Ui
+}
+
+func (w *UiWriter) Write(p []byte) (n int, err error) {
+	n = len(p)
+	if n > 0 && p[n-1] == '\n' {
+		p = p[:n-1]
+	}
+
+	w.Ui.Info(string(p))
+	return n, nil
+}

vendor/github.com/mitchellh/go-testing-interface/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Mitchell Hashimoto
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/mitchellh/go-testing-interface/README.md

@@ -0,0 +1,52 @@
+# go-testing-interface
+
+go-testing-interface is a Go library that exports an interface that
+`*testing.T` implements as well as a runtime version you can use in its
+place.
+
+The purpose of this library is so that you can export test helpers as a
+public API without depending on the "testing" package, since you can't
+create a `*testing.T` struct manually. This lets you, for example, use the
+public testing APIs to generate mock data at runtime, rather than just at
+test time.
+
+## Usage & Example
+
+For usage and examples see the [Godoc](http://godoc.org/github.com/mitchellh/go-testing-interface).
+
+Given a test helper written using `go-testing-interface` like this:
+
+    import "github.com/mitchellh/go-testing-interface"
+
+    func TestHelper(t testing.T) {
+        t.Fatal("I failed")
+    }
+
+You can call the test helper in a real test easily:
+
+    import "testing"
+
+    func TestThing(t *testing.T) {
+        TestHelper(t)
+    }
+
+You can also call the test helper at runtime if needed:
+
+    import "github.com/mitchellh/go-testing-interface"
+
+    func main() {
+        TestHelper(&testing.RuntimeT{})
+    }
+
+## Why?!
+
+**Why would I call a test helper that takes a *testing.T at runtime?**
+
+You probably shouldn't. The only use case I've seen (and I've had) for this
+is to implement a "dev mode" for a service where the test helpers are used
+to populate mock data, create a mock DB, perhaps run service dependencies
+in-memory, etc.
+
+Outside of a "dev mode", I've never seen a use case for this and I think
+there shouldn't be one since the point of the `testing.T` interface is that
+you can fail immediately.

vendor/github.com/mitchellh/go-testing-interface/testing.go

@@ -0,0 +1,84 @@
+// +build !go1.9
+
+package testing
+
+import (
+	"fmt"
+	"log"
+)
+
+// T is the interface that mimics the standard library *testing.T.
+//
+// In unit tests you can just pass a *testing.T struct. At runtime, outside
+// of tests, you can pass in a RuntimeT struct from this package.
+type T interface {
+	Error(args ...interface{})
+	Errorf(format string, args ...interface{})
+	Fail()
+	FailNow()
+	Failed() bool
+	Fatal(args ...interface{})
+	Fatalf(format string, args ...interface{})
+	Log(args ...interface{})
+	Logf(format string, args ...interface{})
+	Name() string
+	Skip(args ...interface{})
+	SkipNow()
+	Skipf(format string, args ...interface{})
+	Skipped() bool
+}
+
+// RuntimeT implements T and can be instantiated and run at runtime to
+// mimic *testing.T behavior. Unlike *testing.T, this will simply panic
+// for calls to Fatal. For calls to Error, you'll have to check the errors
+// list to determine whether to exit yourself. Name and Skip methods are
+// unimplemented noops.
+type RuntimeT struct {
+	failed bool
+}
+
+func (t *RuntimeT) Error(args ...interface{}) {
+	log.Println(fmt.Sprintln(args...))
+	t.Fail()
+}
+
+func (t *RuntimeT) Errorf(format string, args ...interface{}) {
+	log.Println(fmt.Sprintf(format, args...))
+	t.Fail()
+}
+
+func (t *RuntimeT) Fatal(args ...interface{}) {
+	log.Println(fmt.Sprintln(args...))
+	t.FailNow()
+}
+
+func (t *RuntimeT) Fatalf(format string, args ...interface{}) {
+	log.Println(fmt.Sprintf(format, args...))
+	t.FailNow()
+}
+
+func (t *RuntimeT) Fail() {
+	t.failed = true
+}
+
+func (t *RuntimeT) FailNow() {
+	panic("testing.T failed, see logs for output (if any)")
+}
+
+func (t *RuntimeT) Failed() bool {
+	return t.failed
+}
+
+func (t *RuntimeT) Log(args ...interface{}) {
+	log.Println(fmt.Sprintln(args...))
+}
+
+func (t *RuntimeT) Logf(format string, args ...interface{}) {
+	log.Println(fmt.Sprintf(format, args...))
+}
+
+func (t *RuntimeT) Name() string                             { return "" }
+func (t *RuntimeT) Skip(args ...interface{})                 {}
+func (t *RuntimeT) SkipNow()                                 {}
+func (t *RuntimeT) Skipf(format string, args ...interface{}) {}
+func (t *RuntimeT) Skipped() bool                            { return false }

vendor/github.com/mitchellh/go-testing-interface/testing_go19.go

@@ -0,0 +1,108 @@
+// +build go1.9
+
+// NOTE: This is a temporary copy of testing.go for Go 1.9 with the addition
+// of "Helper" to the T interface. Go 1.9 at the time of typing is in RC
+// and is set for release shortly. We'll support this on master as the default
+// as soon as 1.9 is released.
+
+package testing
+
+import (
+	"fmt"
+	"log"
+)
+
+// T is the interface that mimics the standard library *testing.T.
+//
+// In unit tests you can just pass a *testing.T struct. At runtime, outside
+// of tests, you can pass in a RuntimeT struct from this package.
+type T interface {
+	Error(args ...interface{})
+	Errorf(format string, args ...interface{})
+	Fail()
+	FailNow()
+	Failed() bool
+	Fatal(args ...interface{})
+	Fatalf(format string, args ...interface{})
+	Log(args ...interface{})
+	Logf(format string, args ...interface{})
+	Name() string
+	Skip(args ...interface{})
+	SkipNow()
+	Skipf(format string, args ...interface{})
+	Skipped() bool
+	Helper()
+}
+
+// RuntimeT implements T and can be instantiated and run at runtime to
+// mimic *testing.T behavior. Unlike *testing.T, this will simply panic
+// for calls to Fatal. For calls to Error, you'll have to check the errors
+// list to determine whether to exit yourself.
+type RuntimeT struct {
+	skipped bool
+	failed  bool
+}
+
+func (t *RuntimeT) Error(args ...interface{}) {
+	log.Println(fmt.Sprintln(args...))
+	t.Fail()
+}
+
+func (t *RuntimeT) Errorf(format string, args ...interface{}) {
+	log.Printf(format, args...)
+	t.Fail()
+}
+
+func (t *RuntimeT) Fail() {
+	t.failed = true
+}
+
+func (t *RuntimeT) FailNow() {
+	panic("testing.T failed, see logs for output (if any)")
+}
+
+func (t *RuntimeT) Failed() bool {
+	return t.failed
+}
+
+func (t *RuntimeT) Fatal(args ...interface{}) {
+	log.Print(args...)
+	t.FailNow()
+}
+
+func (t *RuntimeT) Fatalf(format string, args ...interface{}) {
+	log.Printf(format, args...)
+	t.FailNow()
+}
+
+func (t *RuntimeT) Log(args ...interface{}) {
+	log.Println(fmt.Sprintln(args...))
+}
+
+func (t *RuntimeT) Logf(format string, args ...interface{}) {
+	log.Println(fmt.Sprintf(format, args...))
+}
+
+func (t *RuntimeT) Name() string {
+	return ""
+}
+
+func (t *RuntimeT) Skip(args ...interface{}) {
+	log.Print(args...)
+	t.SkipNow()
+}
+
+func (t *RuntimeT) SkipNow() {
+	t.skipped = true
+}
+
+func (t *RuntimeT) Skipf(format string, args ...interface{}) {
+	log.Printf(format, args...)
+	t.SkipNow()
+}
+
+func (t *RuntimeT) Skipped() bool {
+	return t.skipped
+}
+
+func (t *RuntimeT) Helper() {}

vendor/github.com/posener/complete/LICENSE.txt

@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2017 Eyal Posener
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/posener/complete/args.go

@@ -0,0 +1,102 @@
+package complete
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"unicode"
+)
+
+// Args describes command line arguments
+type Args struct {
+	// All lists of all arguments in command line (not including the command itself)
+	All []string
+	// Completed lists of all completed arguments in command line,
+	// If the last one is still being typed - no space after it,
+	// it won't appear in this list of arguments.
+	Completed []string
+	// Last argument in command line, the one being typed, if the last
+	// character in the command line is a space, this argument will be empty,
+	// otherwise this would be the last word.
+	Last string
+	// LastCompleted is the last argument that was fully typed.
+	// If the last character in the command line is space, this would be the
+	// last word, otherwise, it would be the word before that.
+	LastCompleted string
+}
+
+// Directory gives the directory of the current written
+// last argument if it represents a file name being written.
+// in case that it is not, we fall back to the current directory.
+func (a Args) Directory() string {
+	if info, err := os.Stat(a.Last); err == nil && info.IsDir() {
+		return fixPathForm(a.Last, a.Last)
+	}
+	dir := filepath.Dir(a.Last)
+	if info, err := os.Stat(dir); err != nil || !info.IsDir() {
+		return "./"
+	}
+	return fixPathForm(a.Last, dir)
+}
+
+func newArgs(line string) Args {
+	var (
+		all       []string
+		completed []string
+	)
+	parts := splitFields(line)
+	if len(parts) > 0 {
+		all = parts[1:]
+		completed = removeLast(parts[1:])
+	}
+	return Args{
+		All:           all,
+		Completed:     completed,
+		Last:          last(parts),
+		LastCompleted: last(completed),
+	}
+}
+
+func splitFields(line string) []string {
+	parts := strings.Fields(line)
+	if len(line) > 0 && unicode.IsSpace(rune(line[len(line)-1])) {
+		parts = append(parts, "")
+	}
+	parts = splitLastEqual(parts)
+	return parts
+}
+
+func splitLastEqual(line []string) []string {
+	if len(line) == 0 {
+		return line
+	}
+	parts := strings.Split(line[len(line)-1], "=")
+	return append(line[:len(line)-1], parts...)
+}
+
+func (a Args) from(i int) Args {
+	if i > len(a.All) {
+		i = len(a.All)
+	}
+	a.All = a.All[i:]
+
+	if i > len(a.Completed) {
+		i = len(a.Completed)
+	}
+	a.Completed = a.Completed[i:]
+	return a
+}
+
+func removeLast(a []string) []string {
+	if len(a) > 0 {
+		return a[:len(a)-1]
+	}
+	return a
+}
+
+func last(args []string) string {
+	if len(args) == 0 {
+		return ""
+	}
+	return args[len(args)-1]
+}

vendor/github.com/posener/complete/cmd/cmd.go

@@ -0,0 +1,128 @@
+// Package cmd used for command line options for the complete tool
+package cmd
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/posener/complete/cmd/install"
+)
+
+// CLI for command line
+type CLI struct {
+	Name          string
+	InstallName   string
+	UninstallName string
+
+	install   bool
+	uninstall bool
+	yes       bool
+}
+
+const (
+	defaultInstallName   = "install"
+	defaultUninstallName = "uninstall"
+)
+
+// Run is used when running complete in command line mode.
+// this is used when the complete is not completing words, but to
+// install it or uninstall it.
+func (f *CLI) Run() bool {
+	err := f.validate()
+	if err != nil {
+		os.Stderr.WriteString(err.Error() + "\n")
+		os.Exit(1)
+	}
+
+	switch {
+	case f.install:
+		f.prompt()
+		err = install.Install(f.Name)
+	case f.uninstall:
+		f.prompt()
+		err = install.Uninstall(f.Name)
+	default:
+		// non of the action flags matched,
+		// returning false should make the real program execute
+		return false
+	}
+
+	if err != nil {
+		fmt.Printf("%s failed! %s\n", f.action(), err)
+		os.Exit(3)
+	}
+	fmt.Println("Done!")
+	return true
+}
+
+// prompt use for approval
+// exit if approval was not given
+func (f *CLI) prompt() {
+	defer fmt.Println(f.action() + "ing...")
+	if f.yes {
+		return
+	}
+	fmt.Printf("%s completion for %s? ", f.action(), f.Name)
+	var answer string
+	fmt.Scanln(&answer)
+
+	switch strings.ToLower(answer) {
+	case "y", "yes":
+		return
+	default:
+		fmt.Println("Cancelling...")
+		os.Exit(1)
+	}
+}
+
+// AddFlags adds the CLI flags to the flag set.
+// If flags is nil, the default command line flags will be taken.
+// Pass non-empty strings as installName and uninstallName to override the default
+// flag names.
+func (f *CLI) AddFlags(flags *flag.FlagSet) {
+	if flags == nil {
+		flags = flag.CommandLine
+	}
+
+	if f.InstallName == "" {
+		f.InstallName = defaultInstallName
+	}
+	if f.UninstallName == "" {
+		f.UninstallName = defaultUninstallName
+	}
+
+	if flags.Lookup(f.InstallName) == nil {
+		flags.BoolVar(&f.install, f.InstallName, false,
+			fmt.Sprintf("Install completion for %s command", f.Name))
+	}
+	if flags.Lookup(f.UninstallName) == nil {
+		flags.BoolVar(&f.uninstall, f.UninstallName, false,
+			fmt.Sprintf("Uninstall completion for %s command", f.Name))
+	}
+	if flags.Lookup("y") == nil {
+		flags.BoolVar(&f.yes, "y", false, "Don't prompt user for typing 'yes'")
+	}
+}
+
+// validate the CLI
+func (f *CLI) validate() error {
+	if f.install && f.uninstall {
+		return errors.New("Install and uninstall are mutually exclusive")
+	}
+	return nil
+}
+
+// action name according to the CLI values.
+func (f *CLI) action() string {
+	switch {
+	case f.install:
+		return "Install"
+	case f.uninstall:
+		return "Uninstall"
+	default:
+		return "unknown"
+	}
+}

vendor/github.com/posener/complete/cmd/install/bash.go

@@ -0,0 +1,32 @@
+package install
+
+import "fmt"
+
+// (un)install in bash
+// basically adds/remove from .bashrc:
+//
+// complete -C </path/to/completion/command> <command>
+type bash struct {
+	rc string
+}
+
+func (b bash) Install(cmd, bin string) error {
+	completeCmd := b.cmd(cmd, bin)
+	if lineInFile(b.rc, completeCmd) {
+		return fmt.Errorf("already installed in %s", b.rc)
+	}
+	return appendToFile(b.rc, completeCmd)
+}
+
+func (b bash) Uninstall(cmd, bin string) error {
+	completeCmd := b.cmd(cmd, bin)
+	if !lineInFile(b.rc, completeCmd) {
+		return fmt.Errorf("does not installed in %s", b.rc)
+	}
+
+	return removeFromFile(b.rc, completeCmd)
+}
+
+func (bash) cmd(cmd, bin string) string {
+	return fmt.Sprintf("complete -C %s %s", bin, cmd)
+}

vendor/github.com/posener/complete/cmd/install/install.go

@@ -0,0 +1,92 @@
+package install
+
+import (
+	"errors"
+	"os"
+	"os/user"
+	"path/filepath"
+
+	"github.com/hashicorp/go-multierror"
+)
+
+type installer interface {
+	Install(cmd, bin string) error
+	Uninstall(cmd, bin string) error
+}
+
+// Install complete command given:
+// cmd: is the command name
+func Install(cmd string) error {
+	is := installers()
+	if len(is) == 0 {
+		return errors.New("Did not find any shells to install")
+	}
+	bin, err := getBinaryPath()
+	if err != nil {
+		return err
+	}
+
+	for _, i := range is {
+		errI := i.Install(cmd, bin)
+		if errI != nil {
+			err = multierror.Append(err, errI)
+		}
+	}
+
+	return err
+}
+
+// Uninstall complete command given:
+// cmd: is the command name
+func Uninstall(cmd string) error {
+	is := installers()
+	if len(is) == 0 {
+		return errors.New("Did not find any shells to uninstall")
+	}
+	bin, err := getBinaryPath()
+	if err != nil {
+		return err
+	}
+
+	for _, i := range is {
+		errI := i.Uninstall(cmd, bin)
+		if errI != nil {
+			multierror.Append(err, errI)
+		}
+	}
+
+	return err
+}
+
+func installers() (i []installer) {
+	for _, rc := range [...]string{".bashrc", ".bash_profile"} {
+		if f := rcFile(rc); f != "" {
+			i = append(i, bash{f})
+			break
+		}
+	}
+	if f := rcFile(".zshrc"); f != "" {
+		i = append(i, zsh{f})
+	}
+	return
+}
+
+func getBinaryPath() (string, error) {
+	bin, err := os.Executable()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Abs(bin)
+}
+
+func rcFile(name string) string {
+	u, err := user.Current()
+	if err != nil {
+		return ""
+	}
+	path := filepath.Join(u.HomeDir, name)
+	if _, err := os.Stat(path); err != nil {
+		return ""
+	}
+	return path
+}

vendor/github.com/posener/complete/cmd/install/utils.go

@@ -0,0 +1,118 @@
+package install
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+)
+
+func lineInFile(name string, lookFor string) bool {
+	f, err := os.Open(name)
+	if err != nil {
+		return false
+	}
+	defer f.Close()
+	r := bufio.NewReader(f)
+	prefix := []byte{}
+	for {
+		line, isPrefix, err := r.ReadLine()
+		if err == io.EOF {
+			return false
+		}
+		if err != nil {
+			return false
+		}
+		if isPrefix {
+			prefix = append(prefix, line...)
+			continue
+		}
+		line = append(prefix, line...)
+		if string(line) == lookFor {
+			return true
+		}
+		prefix = prefix[:0]
+	}
+}
+
+func appendToFile(name string, content string) error {
+	f, err := os.OpenFile(name, os.O_RDWR|os.O_APPEND, 0)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	_, err = f.WriteString(fmt.Sprintf("\n%s\n", content))
+	return err
+}
+
+func removeFromFile(name string, content string) error {
+	backup := name + ".bck"
+	err := copyFile(name, backup)
+	if err != nil {
+		return err
+	}
+	temp, err := removeContentToTempFile(name, content)
+	if err != nil {
+		return err
+	}
+
+	err = copyFile(temp, name)
+	if err != nil {
+		return err
+	}
+
+	return os.Remove(backup)
+}
+
+func removeContentToTempFile(name, content string) (string, error) {
+	rf, err := os.Open(name)
+	if err != nil {
+		return "", err
+	}
+	defer rf.Close()
+	wf, err := ioutil.TempFile("/tmp", "complete-")
+	if err != nil {
+		return "", err
+	}
+	defer wf.Close()
+
+	r := bufio.NewReader(rf)
+	prefix := []byte{}
+	for {
+		line, isPrefix, err := r.ReadLine()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return "", err
+		}
+		if isPrefix {
+			prefix = append(prefix, line...)
+			continue
+		}
+		line = append(prefix, line...)
+		str := string(line)
+		if str == content {
+			continue
+		}
+		wf.WriteString(str + "\n")
+		prefix = prefix[:0]
+	}
+	return wf.Name(), nil
+}
+
+func copyFile(src string, dst string) error {
+	in, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+	_, err = io.Copy(out, in)
+	return err
+}

vendor/github.com/posener/complete/cmd/install/zsh.go

@@ -0,0 +1,39 @@
+package install
+
+import "fmt"
+
+// (un)install in zsh
+// basically adds/remove from .zshrc:
+//
+// autoload -U +X bashcompinit && bashcompinit"
+// complete -C </path/to/completion/command> <command>
+type zsh struct {
+	rc string
+}
+
+func (z zsh) Install(cmd, bin string) error {
+	completeCmd := z.cmd(cmd, bin)
+	if lineInFile(z.rc, completeCmd) {
+		return fmt.Errorf("already installed in %s", z.rc)
+	}
+
+	bashCompInit := "autoload -U +X bashcompinit && bashcompinit"
+	if !lineInFile(z.rc, bashCompInit) {
+		completeCmd = bashCompInit + "\n" + completeCmd
+	}
+
+	return appendToFile(z.rc, completeCmd)
+}
+
+func (z zsh) Uninstall(cmd, bin string) error {
+	completeCmd := z.cmd(cmd, bin)
+	if !lineInFile(z.rc, completeCmd) {
+		return fmt.Errorf("does not installed in %s", z.rc)
+	}
+
+	return removeFromFile(z.rc, completeCmd)
+}
+
+func (zsh) cmd(cmd, bin string) string {
+	return fmt.Sprintf("complete -o nospace -C %s %s", bin, cmd)
+}

vendor/github.com/posener/complete/command.go

@@ -0,0 +1,111 @@
+package complete
+
+// Command represents a command line
+// It holds the data that enables auto completion of command line
+// Command can also be a sub command.
+type Command struct {
+	// Sub is map of sub commands of the current command
+	// The key refer to the sub command name, and the value is it's
+	// Command descriptive struct.
+	Sub Commands
+
+	// Flags is a map of flags that the command accepts.
+	// The key is the flag name, and the value is it's predictions.
+	Flags Flags
+
+	// GlobalFlags is a map of flags that the command accepts.
+	// Global flags that can appear also after a sub command.
+	GlobalFlags Flags
+
+	// Args are extra arguments that the command accepts, those who are
+	// given without any flag before.
+	Args Predictor
+}
+
+// Predict returns all possible predictions for args according to the command struct
+func (c *Command) Predict(a Args) []string {
+	options, _ := c.predict(a)
+	return options
+}
+
+// Commands is the type of Sub member, it maps a command name to a command struct
+type Commands map[string]Command
+
+// Predict completion of sub command names names according to command line arguments
+func (c Commands) Predict(a Args) (prediction []string) {
+	for sub := range c {
+		prediction = append(prediction, sub)
+	}
+	return
+}
+
+// Flags is the type Flags of the Flags member, it maps a flag name to the flag predictions.
+type Flags map[string]Predictor
+
+// Predict completion of flags names according to command line arguments
+func (f Flags) Predict(a Args) (prediction []string) {
+	for flag := range f {
+		// If the flag starts with a hyphen, we avoid emitting the prediction
+		// unless the last typed arg contains a hyphen as well.
+		flagHyphenStart := len(flag) != 0 && flag[0] == '-'
+		lastHyphenStart := len(a.Last) != 0 && a.Last[0] == '-'
+		if flagHyphenStart && !lastHyphenStart {
+			continue
+		}
+		prediction = append(prediction, flag)
+	}
+	return
+}
+
+// predict options
+// only is set to true if no more options are allowed to be returned
+// those are in cases of special flag that has specific completion arguments,
+// and other flags or sub commands can't come after it.
+func (c *Command) predict(a Args) (options []string, only bool) {
+
+	// search sub commands for predictions first
+	subCommandFound := false
+	for i, arg := range a.Completed {
+		if cmd, ok := c.Sub[arg]; ok {
+			subCommandFound = true
+
+			// recursive call for sub command
+			options, only = cmd.predict(a.from(i))
+			if only {
+				return
+			}
+
+			// We matched so stop searching. Continuing to search can accidentally
+			// match a subcommand with current set of commands, see issue #46.
+			break
+		}
+	}
+
+	// if last completed word is a global flag that we need to complete
+	if predictor, ok := c.GlobalFlags[a.LastCompleted]; ok && predictor != nil {
+		Log("Predicting according to global flag %s", a.LastCompleted)
+		return predictor.Predict(a), true
+	}
+
+	options = append(options, c.GlobalFlags.Predict(a)...)
+
+	// if a sub command was entered, we won't add the parent command
+	// completions and we return here.
+	if subCommandFound {
+		return
+	}
+
+	// if last completed word is a command flag that we need to complete
+	if predictor, ok := c.Flags[a.LastCompleted]; ok && predictor != nil {
+		Log("Predicting according to flag %s", a.LastCompleted)
+		return predictor.Predict(a), true
+	}
+
+	options = append(options, c.Sub.Predict(a)...)
+	options = append(options, c.Flags.Predict(a)...)
+	if c.Args != nil {
+		options = append(options, c.Args.Predict(a)...)
+	}
+
+	return
+}

vendor/github.com/posener/complete/complete.go

@@ -0,0 +1,95 @@
+// Package complete provides a tool for bash writing bash completion in go.
+//
+// Writing bash completion scripts is a hard work. This package provides an easy way
+// to create bash completion scripts for any command, and also an easy way to install/uninstall
+// the completion of the command.
+package complete
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/posener/complete/cmd"
+	"github.com/posener/complete/match"
+)
+
+const (
+	envComplete = "COMP_LINE"
+	envDebug    = "COMP_DEBUG"
+)
+
+// Complete structs define completion for a command with CLI options
+type Complete struct {
+	Command Command
+	cmd.CLI
+	Out io.Writer
+}
+
+// New creates a new complete command.
+// name is the name of command we want to auto complete.
+// IMPORTANT: it must be the same name - if the auto complete
+// completes the 'go' command, name must be equal to "go".
+// command is the struct of the command completion.
+func New(name string, command Command) *Complete {
+	return &Complete{
+		Command: command,
+		CLI:     cmd.CLI{Name: name},
+		Out:     os.Stdout,
+	}
+}
+
+// Run runs the completion and add installation flags beforehand.
+// The flags are added to the main flag CommandLine variable.
+func (c *Complete) Run() bool {
+	c.AddFlags(nil)
+	flag.Parse()
+	return c.Complete()
+}
+
+// Complete a command from completion line in environment variable,
+// and print out the complete options.
+// returns success if the completion ran or if the cli matched
+// any of the given flags, false otherwise
+// For installation: it assumes that flags were added and parsed before
+// it was called.
+func (c *Complete) Complete() bool {
+	line, ok := getLine()
+	if !ok {
+		// make sure flags parsed,
+		// in case they were not added in the main program
+		return c.CLI.Run()
+	}
+	Log("Completing line: %s", line)
+	a := newArgs(line)
+	Log("Completing last field: %s", a.Last)
+	options := c.Command.Predict(a)
+	Log("Options: %s", options)
+
+	// filter only options that match the last argument
+	matches := []string{}
+	for _, option := range options {
+		if match.Prefix(option, a.Last) {
+			matches = append(matches, option)
+		}
+	}
+	Log("Matches: %s", matches)
+	c.output(matches)
+	return true
+}
+
+func getLine() (string, bool) {
+	line := os.Getenv(envComplete)
+	if line == "" {
+		return "", false
+	}
+	return line, true
+}
+
+func (c *Complete) output(options []string) {
+	// stdout of program defines the complete options
+	for _, option := range options {
+		fmt.Fprintln(c.Out, option)
+	}
+}

vendor/github.com/posener/complete/log.go

@@ -0,0 +1,23 @@
+package complete
+
+import (
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+)
+
+// Log is used for debugging purposes
+// since complete is running on tab completion, it is nice to
+// have logs to the stderr (when writing your own completer)
+// to write logs, set the COMP_DEBUG environment variable and
+// use complete.Log in the complete program
+var Log = getLogger()
+
+func getLogger() func(format string, args ...interface{}) {
+	var logfile io.Writer = ioutil.Discard
+	if os.Getenv(envDebug) != "" {
+		logfile = os.Stderr
+	}
+	return log.New(logfile, "complete ", log.Flags()).Printf
+}

vendor/github.com/posener/complete/match/file.go

@@ -0,0 +1,19 @@
+package match
+
+import "strings"
+
+// File returns true if prefix can match the file
+func File(file, prefix string) bool {
+	// special case for current directory completion
+	if file == "./" && (prefix == "." || prefix == "") {
+		return true
+	}
+	if prefix == "." && strings.HasPrefix(file, ".") {
+		return true
+	}
+
+	file = strings.TrimPrefix(file, "./")
+	prefix = strings.TrimPrefix(prefix, "./")
+
+	return strings.HasPrefix(file, prefix)
+}

vendor/github.com/posener/complete/match/match.go

@@ -0,0 +1,6 @@
+package match
+
+// Match matches two strings
+// it is used for comparing a term to the last typed
+// word, the prefix, and see if it is a possible auto complete option.
+type Match func(term, prefix string) bool

vendor/github.com/posener/complete/match/prefix.go

@@ -0,0 +1,9 @@
+package match
+
+import "strings"
+
+// Prefix is a simple Matcher, if the word is it's prefix, there is a match
+// Match returns true if a has the prefix as prefix
+func Prefix(long, prefix string) bool {
+	return strings.HasPrefix(long, prefix)
+}

vendor/github.com/posener/complete/metalinter.json

@@ -0,0 +1,21 @@
+{
+    "Vendor": true,
+    "DisableAll": true,
+    "Enable": [
+        "gofmt",
+        "goimports",
+        "interfacer",
+        "goconst",
+        "misspell",
+        "unconvert",
+        "gosimple",
+        "golint",
+        "structcheck",
+        "deadcode",
+        "vet"
+    ],
+    "Exclude": [
+        "initTests is unused"
+    ],
+    "Deadline": "2m"
+}

vendor/github.com/posener/complete/predict.go

@@ -0,0 +1,41 @@
+package complete
+
+// Predictor implements a predict method, in which given
+// command line arguments returns a list of options it predicts.
+type Predictor interface {
+	Predict(Args) []string
+}
+
+// PredictOr unions two predicate functions, so that the result predicate
+// returns the union of their predication
+func PredictOr(predictors ...Predictor) Predictor {
+	return PredictFunc(func(a Args) (prediction []string) {
+		for _, p := range predictors {
+			if p == nil {
+				continue
+			}
+			prediction = append(prediction, p.Predict(a)...)
+		}
+		return
+	})
+}
+
+// PredictFunc determines what terms can follow a command or a flag
+// It is used for auto completion, given last - the last word in the already
+// in the command line, what words can complete it.
+type PredictFunc func(Args) []string
+
+// Predict invokes the predict function and implements the Predictor interface
+func (p PredictFunc) Predict(a Args) []string {
+	if p == nil {
+		return nil
+	}
+	return p(a)
+}
+
+// PredictNothing does not expect anything after.
+var PredictNothing Predictor
+
+// PredictAnything expects something, but nothing particular, such as a number
+// or arbitrary name.
+var PredictAnything = PredictFunc(func(Args) []string { return nil })

vendor/github.com/posener/complete/predict_files.go

@@ -0,0 +1,108 @@
+package complete
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/posener/complete/match"
+)
+
+// PredictDirs will search for directories in the given started to be typed
+// path, if no path was started to be typed, it will complete to directories
+// in the current working directory.
+func PredictDirs(pattern string) Predictor {
+	return files(pattern, false)
+}
+
+// PredictFiles will search for files matching the given pattern in the started to
+// be typed path, if no path was started to be typed, it will complete to files that
+// match the pattern in the current working directory.
+// To match any file, use "*" as pattern. To match go files use "*.go", and so on.
+func PredictFiles(pattern string) Predictor {
+	return files(pattern, true)
+}
+
+func files(pattern string, allowFiles bool) PredictFunc {
+
+	// search for files according to arguments,
+	// if only one directory has matched the result, search recursively into
+	// this directory to give more results.
+	return func(a Args) (prediction []string) {
+		prediction = predictFiles(a, pattern, allowFiles)
+
+		// if the number of prediction is not 1, we either have many results or
+		// have no results, so we return it.
+		if len(prediction) != 1 {
+			return
+		}
+
+		// only try deeper, if the one item is a directory
+		if stat, err := os.Stat(prediction[0]); err != nil || !stat.IsDir() {
+			return
+		}
+
+		a.Last = prediction[0]
+		return predictFiles(a, pattern, allowFiles)
+	}
+}
+
+func predictFiles(a Args, pattern string, allowFiles bool) []string {
+	if strings.HasSuffix(a.Last, "/..") {
+		return nil
+	}
+
+	dir := a.Directory()
+	files := listFiles(dir, pattern, allowFiles)
+
+	// add dir if match
+	files = append(files, dir)
+
+	return PredictFilesSet(files).Predict(a)
+}
+
+// PredictFilesSet predict according to file rules to a given set of file names
+func PredictFilesSet(files []string) PredictFunc {
+	return func(a Args) (prediction []string) {
+		// add all matching files to prediction
+		for _, f := range files {
+			f = fixPathForm(a.Last, f)
+
+			// test matching of file to the argument
+			if match.File(f, a.Last) {
+				prediction = append(prediction, f)
+			}
+		}
+		return
+	}
+}
+
+func listFiles(dir, pattern string, allowFiles bool) []string {
+	// set of all file names
+	m := map[string]bool{}
+
+	// list files
+	if files, err := filepath.Glob(filepath.Join(dir, pattern)); err == nil {
+		for _, f := range files {
+			if stat, err := os.Stat(f); err != nil || stat.IsDir() || allowFiles {
+				m[f] = true
+			}
+		}
+	}
+
+	// list directories
+	if dirs, err := ioutil.ReadDir(dir); err == nil {
+		for _, d := range dirs {
+			if d.IsDir() {
+				m[filepath.Join(dir, d.Name())] = true
+			}
+		}
+	}
+
+	list := make([]string, 0, len(m))
+	for k := range m {
+		list = append(list, k)
+	}
+	return list
+}

vendor/github.com/posener/complete/predict_set.go

@@ -0,0 +1,12 @@
+package complete
+
+// PredictSet expects specific set of terms, given in the options argument.
+func PredictSet(options ...string) Predictor {
+	return predictSet(options)
+}
+
+type predictSet []string
+
+func (p predictSet) Predict(a Args) []string {
+	return p
+}

vendor/github.com/posener/complete/readme.md

@@ -0,0 +1,116 @@
+# complete
+
+[![Build Status](https://travis-ci.org/posener/complete.svg?branch=master)](https://travis-ci.org/posener/complete)
+[![codecov](https://codecov.io/gh/posener/complete/branch/master/graph/badge.svg)](https://codecov.io/gh/posener/complete)
+[![GoDoc](https://godoc.org/github.com/posener/complete?status.svg)](http://godoc.org/github.com/posener/complete)
+[![Go Report Card](https://goreportcard.com/badge/github.com/posener/complete)](https://goreportcard.com/report/github.com/posener/complete)
+
+A tool for bash writing bash completion in go.
+
+Writing bash completion scripts is a hard work. This package provides an easy way
+to create bash completion scripts for any command, and also an easy way to install/uninstall
+the completion of the command.
+
+## go command bash completion
+
+In [gocomplete](./gocomplete) there is an example for bash completion for the `go` command line.
+
+This is an example that uses the `complete` package on the `go` command - the `complete` package
+can also be used to implement any completions, see [Usage](#usage).
+
+### Install
+
+1. Type in your shell:
+```
+go get -u github.com/posener/complete/gocomplete
+gocomplete -install
+```
+
+2. Restart your shell
+
+Uninstall by `gocomplete -uninstall`
+
+### Features
+
+- Complete `go` command, including sub commands and all flags.
+- Complete packages names or `.go` files when necessary.
+- Complete test names after `-run` flag.
+
+## complete package
+
+Supported shells:
+
+- [x] bash
+- [x] zsh
+
+### Usage
+
+Assuming you have program called `run` and you want to have bash completion
+for it, meaning, if you type `run` then space, then press the `Tab` key,
+the shell will suggest relevant complete options.
+
+In that case, we will create a program called `runcomplete`, a go program,
+with a `func main()` and so, that will make the completion of the `run`
+program. Once the `runcomplete` will be in a binary form, we could 
+`runcomplete -install` and that will add to our shell all the bash completion
+options for `run`.
+
+So here it is:
+
+```go
+import "github.com/posener/complete"
+
+func main() {
+
+	// create a Command object, that represents the command we want
+	// to complete.
+	run := complete.Command{
+
+		// Sub defines a list of sub commands of the program,
+		// this is recursive, since every command is of type command also.
+		Sub: complete.Commands{
+
+			// add a build sub command
+			"build": complete.Command {
+
+				// define flags of the build sub command
+				Flags: complete.Flags{
+					// build sub command has a flag '-cpus', which
+					// expects number of cpus after it. in that case
+					// anything could complete this flag.
+					"-cpus": complete.PredictAnything,
+				},
+			},
+		},
+
+		// define flags of the 'run' main command
+		Flags: complete.Flags{
+			// a flag -o, which expects a file ending with .out after
+			// it, the tab completion will auto complete for files matching
+			// the given pattern.
+			"-o": complete.PredictFiles("*.out"),
+		},
+
+		// define global flags of the 'run' main command
+		// those will show up also when a sub command was entered in the
+		// command line
+		GlobalFlags: complete.Flags{
+
+			// a flag '-h' which does not expects anything after it
+			"-h": complete.PredictNothing,
+		},
+	}
+
+	// run the command completion, as part of the main() function.
+	// this triggers the autocompletion when needed.
+	// name must be exactly as the binary that we want to complete.
+	complete.New("run", run).Run()
+}
+```
+
+### Self completing program
+
+In case that the program that we want to complete is written in go we
+can make it self completing.
+
+Here is an [example](./example/self/main.go)

vendor/github.com/posener/complete/test.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -e
+echo "" > coverage.txt
+
+for d in $(go list ./... | grep -v vendor); do
+    go test -v -race -coverprofile=profile.out -covermode=atomic $d
+    if [ -f profile.out ]; then
+        cat profile.out >> coverage.txt
+        rm profile.out
+    fi
+done

vendor/github.com/posener/complete/utils.go

@@ -0,0 +1,46 @@
+package complete
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// fixPathForm changes a file name to a relative name
+func fixPathForm(last string, file string) string {
+	// get wording directory for relative name
+	workDir, err := os.Getwd()
+	if err != nil {
+		return file
+	}
+
+	abs, err := filepath.Abs(file)
+	if err != nil {
+		return file
+	}
+
+	// if last is absolute, return path as absolute
+	if filepath.IsAbs(last) {
+		return fixDirPath(abs)
+	}
+
+	rel, err := filepath.Rel(workDir, abs)
+	if err != nil {
+		return file
+	}
+
+	// fix ./ prefix of path
+	if rel != "." && strings.HasPrefix(last, ".") {
+		rel = "./" + rel
+	}
+
+	return fixDirPath(rel)
+}
+
+func fixDirPath(path string) string {
+	info, err := os.Stat(path)
+	if err == nil && info.IsDir() && !strings.HasSuffix(path, "/") {
+		path += "/"
+	}
+	return path
+}

vendor/golang.org/x/sys/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/golang.org/x/sys/PATENTS

@@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.

vendor/golang.org/x/sys/unix/README.md

@@ -0,0 +1,173 @@
+# Building `sys/unix`
+
+The sys/unix package provides access to the raw system call interface of the
+underlying operating system. See: https://godoc.org/golang.org/x/sys/unix
+
+Porting Go to a new architecture/OS combination or adding syscalls, types, or
+constants to an existing architecture/OS pair requires some manual effort;
+however, there are tools that automate much of the process.
+
+## Build Systems
+
+There are currently two ways we generate the necessary files. We are currently
+migrating the build system to use containers so the builds are reproducible.
+This is being done on an OS-by-OS basis. Please update this documentation as
+components of the build system change.
+
+### Old Build System (currently for `GOOS != "Linux" || GOARCH == "sparc64"`)
+
+The old build system generates the Go files based on the C header files
+present on your system. This means that files
+for a given GOOS/GOARCH pair must be generated on a system with that OS and
+architecture. This also means that the generated code can differ from system
+to system, based on differences in the header files.
+
+To avoid this, if you are using the old build system, only generate the Go
+files on an installation with unmodified header files. It is also important to
+keep track of which version of the OS the files were generated from (ex.
+Darwin 14 vs Darwin 15). This makes it easier to track the progress of changes
+and have each OS upgrade correspond to a single change.
+
+To build the files for your current OS and architecture, make sure GOOS and
+GOARCH are set correctly and run `mkall.sh`. This will generate the files for
+your specific system. Running `mkall.sh -n` shows the commands that will be run.
+
+Requirements: bash, perl, go
+
+### New Build System (currently for `GOOS == "Linux" && GOARCH != "sparc64"`)
+
+The new build system uses a Docker container to generate the go files directly
+from source checkouts of the kernel and various system libraries. This means
+that on any platform that supports Docker, all the files using the new build
+system can be generated at once, and generated files will not change based on
+what the person running the scripts has installed on their computer.
+
+The OS specific files for the new build system are located in the `${GOOS}`
+directory, and the build is coordinated by the `${GOOS}/mkall.go` program. When
+the kernel or system library updates, modify the Dockerfile at
+`${GOOS}/Dockerfile` to checkout the new release of the source.
+
+To build all the files under the new build system, you must be on an amd64/Linux
+system and have your GOOS and GOARCH set accordingly. Running `mkall.sh` will
+then generate all of the files for all of the GOOS/GOARCH pairs in the new build
+system. Running `mkall.sh -n` shows the commands that will be run.
+
+Requirements: bash, perl, go, docker
+
+## Component files
+
+This section describes the various files used in the code generation process.
+It also contains instructions on how to modify these files to add a new
+architecture/OS or to add additional syscalls, types, or constants. Note that
+if you are using the new build system, the scripts cannot be called normally.
+They must be called from within the docker container.
+
+### asm files
+
+The hand-written assembly file at `asm_${GOOS}_${GOARCH}.s` implements system
+call dispatch. There are three entry points:
+```
+  func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
+  func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
+  func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
+```
+The first and second are the standard ones; they differ only in how many
+arguments can be passed to the kernel. The third is for low-level use by the
+ForkExec wrapper. Unlike the first two, it does not call into the scheduler to
+let it know that a system call is running.
+
+When porting Go to an new architecture/OS, this file must be implemented for
+each GOOS/GOARCH pair.
+
+### mksysnum
+
+Mksysnum is a script located at `${GOOS}/mksysnum.pl` (or `mksysnum_${GOOS}.pl`
+for the old system). This script takes in a list of header files containing the
+syscall number declarations and parses them to produce the corresponding list of
+Go numeric constants. See `zsysnum_${GOOS}_${GOARCH}.go` for the generated
+constants.
+
+Adding new syscall numbers is mostly done by running the build on a sufficiently
+new installation of the target OS (or updating the source checkouts for the
+new build system). However, depending on the OS, you make need to update the
+parsing in mksysnum.
+
+### mksyscall.pl
+
+The `syscall.go`, `syscall_${GOOS}.go`, `syscall_${GOOS}_${GOARCH}.go` are
+hand-written Go files which implement system calls (for unix, the specific OS,
+or the specific OS/Architecture pair respectively) that need special handling
+and list `//sys` comments giving prototypes for ones that can be generated.
+
+The mksyscall.pl script takes the `//sys` and `//sysnb` comments and converts
+them into syscalls. This requires the name of the prototype in the comment to
+match a syscall number in the `zsysnum_${GOOS}_${GOARCH}.go` file. The function
+prototype can be exported (capitalized) or not.
+
+Adding a new syscall often just requires adding a new `//sys` function prototype
+with the desired arguments and a capitalized name so it is exported. However, if
+you want the interface to the syscall to be different, often one will make an
+unexported `//sys` prototype, an then write a custom wrapper in
+`syscall_${GOOS}.go`.
+
+### types files
+
+For each OS, there is a hand-written Go file at `${GOOS}/types.go` (or
+`types_${GOOS}.go` on the old system). This file includes standard C headers and
+creates Go type aliases to the corresponding C types. The file is then fed
+through godef to get the Go compatible definitions. Finally, the generated code
+is fed though mkpost.go to format the code correctly and remove any hidden or
+private identifiers. This cleaned-up code is written to
+`ztypes_${GOOS}_${GOARCH}.go`.
+
+The hardest part about preparing this file is figuring out which headers to
+include and which symbols need to be `#define`d to get the actual data
+structures that pass through to the kernel system calls. Some C libraries
+preset alternate versions for binary compatibility and translate them on the
+way in and out of system calls, but there is almost always a `#define` that can
+get the real ones.
+See `types_darwin.go` and `linux/types.go` for examples.
+
+To add a new type, add in the necessary include statement at the top of the
+file (if it is not already there) and add in a type alias line. Note that if
+your type is significantly different on different architectures, you may need
+some `#if/#elif` macros in your include statements.
+
+### mkerrors.sh
+
+This script is used to generate the system's various constants. This doesn't
+just include the error numbers and error strings, but also the signal numbers
+an a wide variety of miscellaneous constants. The constants come from the list
+of include files in the `includes_${uname}` variable. A regex then picks out
+the desired `#define` statements, and generates the corresponding Go constants.
+The error numbers and strings are generated from `#include <errno.h>`, and the
+signal numbers and strings are generated from `#include <signal.h>`. All of
+these constants are written to `zerrors_${GOOS}_${GOARCH}.go` via a C program,
+`_errors.c`, which prints out all the constants.
+
+To add a constant, add the header that includes it to the appropriate variable.
+Then, edit the regex (if necessary) to match the desired constant. Avoid making
+the regex too broad to avoid matching unintended constants.
+
+
+## Generated files
+
+### `zerror_${GOOS}_${GOARCH}.go`
+
+A file containing all of the system's generated error numbers, error strings,
+signal numbers, and constants. Generated by `mkerrors.sh` (see above).
+
+### `zsyscall_${GOOS}_${GOARCH}.go`
+
+A file containing all the generated syscalls for a specific GOOS and GOARCH.
+Generated by `mksyscall.pl` (see above).
+
+### `zsysnum_${GOOS}_${GOARCH}.go`
+
+A list of numeric constants for all the syscall number of the specific GOOS
+and GOARCH. Generated by mksysnum (see above).
+
+### `ztypes_${GOOS}_${GOARCH}.go`
+
+A file containing Go types for passing into (or returning from) syscalls.
+Generated by godefs and the types file (see above).

vendor/golang.org/x/sys/unix/asm_darwin_386.s

@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for 386, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_darwin_amd64.s

@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_darwin_arm.s

@@ -0,0 +1,30 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+// +build arm,darwin
+
+#include "textflag.h"
+
+//
+// System call support for ARM, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-28
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_darwin_arm64.s

@@ -0,0 +1,30 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+// +build arm64,darwin
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	B	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_dragonfly_amd64.s

@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, DragonFly
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-64
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-88
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-112
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-64
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-88
+	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_freebsd_386.s

@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for 386, FreeBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_freebsd_amd64.s

@@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, FreeBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)

vendor/golang.org/x/sys/unix/asm_freebsd_arm.s

@@ -0,0 +1,29 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for ARM, FreeBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-28
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	B	syscall·RawSyscall6(SB)