1 files changed, 86 insertions, 0 deletions
diff --git a/src/cmd/godoc/appinit.go b/src/cmd/godoc/appinit.go
new file mode 100644
index 000000000..9b8987223
--- /dev/null
+++ b/src/cmd/godoc/appinit.go
@@ -0,0 +1,86 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// To run godoc under app engine, substitute main.go with
+// this file (appinit.go), provide a .zip file containing
+// the file system to serve, and adjust the configuration
+// parameters in appconfig.go accordingly.
+//
+// The current app engine SDK may be based on an older Go
+// release version. To correct for version skew, copy newer
+// packages into the alt directory (e.g. alt/strings) and
+// adjust the imports in the godoc source files (e.g. from
+// `import "strings"` to `import "alt/strings"`). Both old
+// and new packages may be used simultaneously as long as
+// there is no package global state that needs to be shared.
+//
+// The directory structure should look as follows:
+//
+// godoc			// directory containing the app engine app
+//      alt			// alternative packages directory to
+//				//	correct for version skew
+//		strings		// never version of the strings package
+//		...		//
+//	app.yaml		// app engine control file
+//	go.zip			// zip file containing the file system to serve
+//	godoc			// contains godoc sources
+//		appinit.go	// this file instead of godoc/main.go
+//		appconfig.go	// godoc for app engine configuration
+//		...		//
+//
+// To run app the engine emulator locally:
+//
+//	dev_appserver.py -a 0 godoc
+//
+// godoc is the top-level "goroot" directory.
+// The godoc home page is served at: <hostname>:8080 and localhost:8080.
+
+package main
+
+import (
+	"alt/archive/zip"
+	"http"
+	"log"
+	"os"
+)
+
+func serveError(w http.ResponseWriter, r *http.Request, relpath string, err os.Error) {
+	contents := applyTemplate(errorHTML, "errorHTML", err) // err may contain an absolute path!
+	w.WriteHeader(http.StatusNotFound)
+	servePage(w, "File "+relpath, "", "", contents)
+}
+
+func init() {
+	log.Println("initializing godoc ...")
+	*goroot = path.Join("/", zipGoroot) // fsHttp paths are relative to '/'
+
+	// read .zip file and set up file systems
+	const zipfile = zipFilename
+	rc, err := zip.OpenReader(zipfile)
+	if err != nil {
+		log.Fatalf("%s: %s\n", zipfile, err)
+	}
+	fs = NewZipFS(rc)
+	fsHttp = NewHttpZipFS(rc, *goroot)
+
+	// initialize http handlers
+	initHandlers()
+	readTemplates()
+	registerPublicHandlers(http.DefaultServeMux)
+
+	// initialize default directory tree with corresponding timestamp.
+	initFSTree()
+
+	// initialize directory trees for user-defined file systems (-path flag).
+	initDirTrees()
+
+	// create search index
+	// TODO(gri) Disabled for now as it takes too long. Find a solution for this.
+	/*
+		*indexEnabled = true
+		go indexer()
+	*/
+
+	log.Println("godoc initialization complete")
+}