Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/google.golang.org/appengine/internal/identity_vm.go b/vendor/google.golang.org/appengine/internal/identity_vm.go
new file mode 100644
index 0000000..5d80672
--- /dev/null
+++ b/vendor/google.golang.org/appengine/internal/identity_vm.go
@@ -0,0 +1,134 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// +build !appengine
+
+package internal
+
+import (
+ "log"
+ "net/http"
+ "os"
+ "strings"
+
+ netcontext "golang.org/x/net/context"
+)
+
+// These functions are implementations of the wrapper functions
+// in ../appengine/identity.go. See that file for commentary.
+
+const (
+ hDefaultVersionHostname = "X-AppEngine-Default-Version-Hostname"
+ hRequestLogId = "X-AppEngine-Request-Log-Id"
+ hDatacenter = "X-AppEngine-Datacenter"
+)
+
+func ctxHeaders(ctx netcontext.Context) http.Header {
+ c := fromContext(ctx)
+ if c == nil {
+ return nil
+ }
+ return c.Request().Header
+}
+
+func DefaultVersionHostname(ctx netcontext.Context) string {
+ return ctxHeaders(ctx).Get(hDefaultVersionHostname)
+}
+
+func RequestID(ctx netcontext.Context) string {
+ return ctxHeaders(ctx).Get(hRequestLogId)
+}
+
+func Datacenter(ctx netcontext.Context) string {
+ if dc := ctxHeaders(ctx).Get(hDatacenter); dc != "" {
+ return dc
+ }
+ // If the header isn't set, read zone from the metadata service.
+ // It has the format projects/[NUMERIC_PROJECT_ID]/zones/[ZONE]
+ zone, err := getMetadata("instance/zone")
+ if err != nil {
+ log.Printf("Datacenter: %v", err)
+ return ""
+ }
+ parts := strings.Split(string(zone), "/")
+ if len(parts) == 0 {
+ return ""
+ }
+ return parts[len(parts)-1]
+}
+
+func ServerSoftware() string {
+ // TODO(dsymonds): Remove fallback when we've verified this.
+ if s := os.Getenv("SERVER_SOFTWARE"); s != "" {
+ return s
+ }
+ if s := os.Getenv("GAE_ENV"); s != "" {
+ return s
+ }
+ return "Google App Engine/1.x.x"
+}
+
+// TODO(dsymonds): Remove the metadata fetches.
+
+func ModuleName(_ netcontext.Context) string {
+ if s := os.Getenv("GAE_MODULE_NAME"); s != "" {
+ return s
+ }
+ if s := os.Getenv("GAE_SERVICE"); s != "" {
+ return s
+ }
+ return string(mustGetMetadata("instance/attributes/gae_backend_name"))
+}
+
+func VersionID(_ netcontext.Context) string {
+ if s1, s2 := os.Getenv("GAE_MODULE_VERSION"), os.Getenv("GAE_MINOR_VERSION"); s1 != "" && s2 != "" {
+ return s1 + "." + s2
+ }
+ if s1, s2 := os.Getenv("GAE_VERSION"), os.Getenv("GAE_DEPLOYMENT_ID"); s1 != "" && s2 != "" {
+ return s1 + "." + s2
+ }
+ return string(mustGetMetadata("instance/attributes/gae_backend_version")) + "." + string(mustGetMetadata("instance/attributes/gae_backend_minor_version"))
+}
+
+func InstanceID() string {
+ if s := os.Getenv("GAE_MODULE_INSTANCE"); s != "" {
+ return s
+ }
+ if s := os.Getenv("GAE_INSTANCE"); s != "" {
+ return s
+ }
+ return string(mustGetMetadata("instance/attributes/gae_backend_instance"))
+}
+
+func partitionlessAppID() string {
+ // gae_project has everything except the partition prefix.
+ if appID := os.Getenv("GAE_LONG_APP_ID"); appID != "" {
+ return appID
+ }
+ if project := os.Getenv("GOOGLE_CLOUD_PROJECT"); project != "" {
+ return project
+ }
+ return string(mustGetMetadata("instance/attributes/gae_project"))
+}
+
+func fullyQualifiedAppID(_ netcontext.Context) string {
+ if s := os.Getenv("GAE_APPLICATION"); s != "" {
+ return s
+ }
+ appID := partitionlessAppID()
+
+ part := os.Getenv("GAE_PARTITION")
+ if part == "" {
+ part = string(mustGetMetadata("instance/attributes/gae_partition"))
+ }
+
+ if part != "" {
+ appID = part + "~" + appID
+ }
+ return appID
+}
+
+func IsDevAppServer() bool {
+ return os.Getenv("RUN_WITH_DEVAPPSERVER") != ""
+}