Add a terraform version header to all atlas calls

Using the DefaultHeader added to the atlas.Client

command/push.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/hashicorp/atlas-go/archive"
 	"github.com/hashicorp/atlas-go/v1"
+	"github.com/hashicorp/terraform/terraform"
 )
 
 type PushCommand struct {
@@ -126,6 +127,8 @@ func (c *PushCommand) Run(args []string) int {
 			}
 		}
 
+		client.DefaultHeader.Set(terraform.VersionHeader, terraform.Version)
+
 		if atlasToken != "" {
 			client.Token = atlasToken
 		}

terraform/version.go

@@ -16,3 +16,7 @@ const VersionPrerelease = "dev"
 // benefit of verifying during tests and init time that our version is a
 // proper semantic version, which should always be the case.
 var SemVersion = version.Must(version.NewVersion(Version))
+
+// VersionHeader is the header name used to send the current terraform version
+// in http requests.
+const VersionHeader = "Terraform-Version"