Switch to using golangci-lint instead of go-metalinter (#3049)

* Switch to using golangci-lint instead of gometalinter.

* Update list of allowed ignored errors.

* Add GOFLAG=mod-vendor env var to travis.

* Fix env vars.

.golangci.yml

@@ -0,0 +1,26 @@
+issues:
+  max-per-linter: 0
+  max-same-issues: 0
+
+linters:
+  disable-all: true
+  enable:
+    - deadcode
+    - errcheck
+    - gofmt
+    - gosimple
+    - ineffassign
+    - misspell
+    - staticcheck
+    - structcheck
+    - unconvert
+    - unused
+    - varcheck
+    - vet
+
+linters-settings:
+  errcheck:
+    ignore: github.com/hashicorp/terraform/helper/schema:ForceNew|Set,fmt:.*,io:Close,github.com/terraform-providers/terraform-provider-google/google:Set
+
+run:
+  modules-download-mode: vendor

.travis.yml

@@ -6,7 +6,8 @@ language: go
 go:
 - "1.11.x"
 env:
-  - GO111MODULE=off
+  - GO111MODULE=on
+    GOFLAGS=-mod=vendor
 
 install:
 # This script is used by the Travis build to install a cookie for
@@ -24,7 +25,6 @@ script:
 branches:
   only:
   - master
-  - 2.0.0
 matrix:
   fast_finish: true
   allow_failures:

GNUmakefile

@@ -26,12 +26,13 @@ fmtcheck:
 
 lint:
 	@echo "==> Checking source code against linters..."
-	@bash -c "GO111MODULE=off gometalinter -d ./... 2> >(egrep '(^DEBUG.*linter took|^DEBUG.*total elapsed|^[^D])' >&2)"
+	@golangci-lint run ./$(PKG_NAME)
 
 tools:
 	@echo "==> installing required tooling..."
-	GO111MODULE=off go get -u github.com/alecthomas/gometalinter
-	GO111MODULE=off gometalinter --install
+	GO111MODULE=off go get -u github.com/client9/misspell/cmd/misspell
+	GO111MODULE=off go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
+
 
 test-compile:
 	@if [ "$(TEST)" = "./..." ]; then \