udpate tf-exec config to re-use TF binary instead downloading a new one

pagerduty/terraform_state_snapshot_helper.go

@@ -2,12 +2,16 @@ package pagerduty
 
 import (
  "context"
+ "fmt"
  "os"
+ "strings"
  "sync"
 
  "github.com/hashicorp/go-version"
+ install "github.com/hashicorp/hc-install"
+ "github.com/hashicorp/hc-install/fs"
  "github.com/hashicorp/hc-install/product"
- "github.com/hashicorp/hc-install/releases"
+ "github.com/hashicorp/hc-install/src"
  "github.com/hashicorp/terraform-exec/tfexec"
  tfjson "github.com/hashicorp/terraform-json"
 )
@@ -41,14 +45,24 @@ func (state *tfStateSnapshot) GetResourceStateById(id string) *tfjson.StateResou
 // getTFStateSnapshot returns an snapshot of the terraform state caring to be
 // concurrent safe while reading the state.
 func getTFStateSnapshot() (*tfStateSnapshot, error) {
- installer := &releases.ExactVersion{
- Product: product.Terraform,
-  Version: version.Must(version.NewVersion("1.0.6")),
- }
+ ctx := context.Background()
+
+ installer := install.NewInstaller()
+ defer installer.Remove(ctx)
 
- execPath, err := installer.Install(context.Background())
+ tfVersionConstrain := ">= 1.0.6"
+ execPath, err := installer.Ensure(ctx, []src.Source{
+ &fs.Version{
+ Product: product.Terraform,
+ Constraints: version.MustConstraints(version.NewConstraint(tfVersionConstrain)),
+ },
+ })
  if err != nil {
- return nil, err
+ isTFVersionUnavailableError := strings.Contains(err.Error(), "terraform: executable file not found in $PATH")
+ if !isTFVersionUnavailableError {
+ return nil, err
+ }
+ return nil, fmt.Errorf("terraform binary version %q not found in $PATH", tfVersionConstrain)
  }
 
  workingDir, err := os.Getwd()