Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/google.golang.org/appengine/internal/main_vm.go b/vendor/google.golang.org/appengine/internal/main_vm.go
new file mode 100644
index 0000000..ddb79a3
--- /dev/null
+++ b/vendor/google.golang.org/appengine/internal/main_vm.go
@@ -0,0 +1,69 @@
+// 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 (
+ "io"
+ "log"
+ "net/http"
+ "net/url"
+ "os"
+ "path/filepath"
+ "runtime"
+)
+
+func Main() {
+ MainPath = filepath.Dir(findMainPath())
+ installHealthChecker(http.DefaultServeMux)
+
+ port := "8080"
+ if s := os.Getenv("PORT"); s != "" {
+ port = s
+ }
+
+ host := ""
+ if IsDevAppServer() {
+ host = "127.0.0.1"
+ }
+ if err := http.ListenAndServe(host+":"+port, http.HandlerFunc(handleHTTP)); err != nil {
+ log.Fatalf("http.ListenAndServe: %v", err)
+ }
+}
+
+// Find the path to package main by looking at the root Caller.
+func findMainPath() string {
+ pc := make([]uintptr, 100)
+ n := runtime.Callers(2, pc)
+ frames := runtime.CallersFrames(pc[:n])
+ for {
+ frame, more := frames.Next()
+ // Tests won't have package main, instead they have testing.tRunner
+ if frame.Function == "main.main" || frame.Function == "testing.tRunner" {
+ return frame.File
+ }
+ if !more {
+ break
+ }
+ }
+ return ""
+}
+
+func installHealthChecker(mux *http.ServeMux) {
+ // If no health check handler has been installed by this point, add a trivial one.
+ const healthPath = "/_ah/health"
+ hreq := &http.Request{
+ Method: "GET",
+ URL: &url.URL{
+ Path: healthPath,
+ },
+ }
+ if _, pat := mux.Handler(hreq); pat != healthPath {
+ mux.HandleFunc(healthPath, func(w http.ResponseWriter, r *http.Request) {
+ io.WriteString(w, "ok")
+ })
+ }
+}