mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-07 09:36:44 +00:00
961c878e0d
Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
32 lines
1.3 KiB
Go
32 lines
1.3 KiB
Go
package function
|
|
|
|
import (
|
|
"github.com/zclconf/go-cty/cty"
|
|
)
|
|
|
|
// Unpredictable wraps a given function such that it retains the same arguments
|
|
// and type checking behavior but will return an unknown value when called.
|
|
//
|
|
// It is recommended that most functions be "pure", which is to say that they
|
|
// will always produce the same value given particular input. However,
|
|
// sometimes it is necessary to offer functions whose behavior depends on
|
|
// some external state, such as reading a file or determining the current time.
|
|
// In such cases, an unpredictable wrapper might be used to stand in for
|
|
// the function during some sort of prior "checking" phase in order to delay
|
|
// the actual effect until later.
|
|
//
|
|
// While Unpredictable can support a function that isn't pure in its
|
|
// implementation, it still expects a function to be pure in its type checking
|
|
// behavior, except for the special case of returning cty.DynamicPseudoType
|
|
// if it is not yet able to predict its return value based on current argument
|
|
// information.
|
|
func Unpredictable(f Function) Function {
|
|
newSpec := *f.spec // shallow copy
|
|
newSpec.Impl = unpredictableImpl
|
|
return New(&newSpec)
|
|
}
|
|
|
|
func unpredictableImpl(args []cty.Value, retType cty.Type) (cty.Value, error) {
|
|
return cty.UnknownVal(retType), nil
|
|
}
|