go.tools/dashboard: add gccgo build dashboard.

This change adds a new build dashboard url to the existing appengine app: $dashurl/gccgo/ which will show the build status of gccgo.
* Added Dashboard struct with exported Name, Rel(ative)Path, and Packages fields.
* Added Dashboard Context method that returns an appengine context with a namespace corresponding to the dashboard's name.
* Modified HandlerFuncs to use Dashboard's Context method for all appengine requests.
* Modified ui template to show different title/header for separate dashboard and added dashboard tab.

R=adg
CC=golang-dev
https://golang.org/cl/13753043

dashboard/app/app.yaml

@@ -13,8 +13,8 @@ handlers:
   static_dir: static
 - url: /log/.+
   script: _go_app
-- url: /(|commit|packages|result|tag|todo)
+- url: /(|gccgo/)(|commit|packages|result|tag|todo)
   script: _go_app
-- url: /(init|buildtest|key|_ah/queue/go/delay)
+- url: /(|gccgo/)(init|buildtest|key|_ah/queue/go/delay)
   script: _go_app
   login: admin

dashboard/app/build/build.go

@@ -84,7 +84,7 @@ func GetPackage(c appengine.Context, path string) (*Package, error) {
 // In other words, all Commits with the same PackagePath belong to the same
 // datastore entity group.
 type Commit struct {
-	PackagePath string // (empty for Go commits)
+	PackagePath string // (empty for main repo commits)
 	Hash        string
 	ParentHash  string
 	Num         int // Internal monotonic counter unique to this package.

dashboard/app/build/dash.go

@@ -0,0 +1,113 @@
+// Copyright 2013 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.
+
+// +build appengine
+
+package build
+
+import (
+	"net/http"
+	"strings"
+
+	"appengine"
+)
+
+// Dashboard describes a unique build dashboard.
+type Dashboard struct {
+	Name     string     // This dashboard's name and namespace
+	RelPath  string     // The relative url path
+	Packages []*Package // The project's packages to build
+}
+
+// dashboardForRequest returns the appropriate dashboard for a given URL path.
+func dashboardForRequest(r *http.Request) *Dashboard {
+	if strings.HasPrefix(r.URL.Path, gccgoDash.RelPath) {
+		return gccgoDash
+	}
+	return goDash
+}
+
+// Context returns a namespaced context for this dashboard, or panics if it
+// fails to create a new context.
+func (d *Dashboard) Context(c appengine.Context) appengine.Context {
+	// No namespace needed for the original Go dashboard.
+	if d.Name == "Go" {
+		return c
+	}
+	n, err := appengine.Namespace(c, d.Name)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+// the currently known dashboards.
+var dashboards = []*Dashboard{goDash, gccgoDash}
+
+// goDash is the dashboard for the main go repository.
+var goDash = &Dashboard{
+	Name:     "Go",
+	RelPath:  "/",
+	Packages: goPackages,
+}
+
+// goPackages is a list of all of the packages built by the main go repository.
+var goPackages = []*Package{
+	{
+		Kind: "go",
+		Name: "Go",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.blog",
+		Path: "code.google.com/p/go.blog",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.codereview",
+		Path: "code.google.com/p/go.codereview",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.crypto",
+		Path: "code.google.com/p/go.crypto",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.exp",
+		Path: "code.google.com/p/go.exp",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.image",
+		Path: "code.google.com/p/go.image",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.net",
+		Path: "code.google.com/p/go.net",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.talks",
+		Path: "code.google.com/p/go.talks",
+	},
+	{
+		Kind: "subrepo",
+		Name: "go.tools",
+		Path: "code.google.com/p/go.tools",
+	},
+}
+
+// gccgoDash is the dashboard for gccgo.
+var gccgoDash = &Dashboard{
+	Name:    "Gccgo",
+	RelPath: "/gccgo/",
+	Packages: []*Package{
+		{
+			Kind: "gccgo",
+			Name: "Gccgo",
+		},
+	},
+}

dashboard/app/build/handler.go

@@ -33,7 +33,7 @@ const commitsPerPage = 30
 //
 // This handler is used by a gobuilder process in -commit mode.
 func commitHandler(r *http.Request) (interface{}, error) {
-	c := appengine.NewContext(r)
+	c := contextForRequest(r)
 	com := new(Commit)
 
 	if r.Method == "GET" {
@@ -132,7 +132,7 @@ func tagHandler(r *http.Request) (interface{}, error) {
 	if err := t.Valid(); err != nil {
 		return nil, err
 	}
-	c := appengine.NewContext(r)
+	c := contextForRequest(r)
 	defer cache.Tick(c)
 	_, err := datastore.Put(c, t.Key(c), t)
 	return nil, err
@@ -148,7 +148,7 @@ type Todo struct {
 // It expects "builder" and "kind" query parameters and returns a *Todo value.
 // Multiple "kind" parameters may be specified.
 func todoHandler(r *http.Request) (interface{}, error) {
-	c := appengine.NewContext(r)
+	c := contextForRequest(r)
 	now := cache.Now(c)
 	key := "build-todo-" + r.Form.Encode()
 	var todo *Todo
@@ -257,7 +257,7 @@ func buildTodo(c appengine.Context, builder, packagePath, goHash string) (interf
 // by the dashboard.
 func packagesHandler(r *http.Request) (interface{}, error) {
 	kind := r.FormValue("kind")
-	c := appengine.NewContext(r)
+	c := contextForRequest(r)
 	now := cache.Now(c)
 	key := "build-packages-" + kind
 	var p []*Package
@@ -282,7 +282,7 @@ func resultHandler(r *http.Request) (interface{}, error) {
 		return nil, errBadMethod(r.Method)
 	}
 
-	c := appengine.NewContext(r)
+	c := contextForRequest(r)
 	res := new(Result)
 	defer r.Body.Close()
 	if err := json.NewDecoder(r.Body).Decode(res); err != nil {
@@ -326,7 +326,7 @@ func resultHandler(r *http.Request) (interface{}, error) {
 // It handles paths like "/log/hash".
 func logHandler(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-type", "text/plain; charset=utf-8")
-	c := appengine.NewContext(r)
+	c := contextForRequest(r)
 	hash := r.URL.Path[len("/log/"):]
 	key := datastore.NewKey(c, "Log", hash, 0, nil)
 	l := new(Log)
@@ -361,7 +361,7 @@ func (e errBadMethod) Error() string {
 // supplied key and builder query parameters.
 func AuthHandler(h dashHandler) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		c := appengine.NewContext(r)
+		c := contextForRequest(r)
 
 		// Put the URL Query values into r.Form to avoid parsing the
 		// request body when calling r.FormValue.
@@ -401,24 +401,26 @@ func keyHandler(w http.ResponseWriter, r *http.Request) {
 		logErr(w, r, errors.New("must supply builder in query string"))
 		return
 	}
-	c := appengine.NewContext(r)
+	c := contextForRequest(r)
 	fmt.Fprint(w, builderKey(c, builder))
 }
 
 func init() {
+	for _, d := range dashboards {
 		// admin handlers
-	http.HandleFunc("/init", initHandler)
-	http.HandleFunc("/key", keyHandler)
+		http.HandleFunc(d.RelPath+"init", initHandler)
+		http.HandleFunc(d.RelPath+"key", keyHandler)
 
 		// authenticated handlers
-	http.HandleFunc("/commit", AuthHandler(commitHandler))
-	http.HandleFunc("/packages", AuthHandler(packagesHandler))
-	http.HandleFunc("/result", AuthHandler(resultHandler))
-	http.HandleFunc("/tag", AuthHandler(tagHandler))
-	http.HandleFunc("/todo", AuthHandler(todoHandler))
+		http.HandleFunc(d.RelPath+"commit", AuthHandler(commitHandler))
+		http.HandleFunc(d.RelPath+"packages", AuthHandler(packagesHandler))
+		http.HandleFunc(d.RelPath+"result", AuthHandler(resultHandler))
+		http.HandleFunc(d.RelPath+"tag", AuthHandler(tagHandler))
+		http.HandleFunc(d.RelPath+"todo", AuthHandler(todoHandler))
 
 		// public handlers
-	http.HandleFunc("/log/", logHandler)
+		http.HandleFunc(d.RelPath+"log/", logHandler)
+	}
 }
 
 func validHash(hash string) bool {
@@ -443,7 +445,11 @@ func builderKey(c appengine.Context, builder string) string {
 }
 
 func logErr(w http.ResponseWriter, r *http.Request, err error) {
-	appengine.NewContext(r).Errorf("Error: %v", err)
+	contextForRequest(r).Errorf("Error: %v", err)
 	w.WriteHeader(http.StatusInternalServerError)
 	fmt.Fprint(w, "Error: ", err)
 }
+
+func contextForRequest(r *http.Request) appengine.Context {
+	return dashboardForRequest(r).Context(appengine.NewContext(r))
+}

dashboard/app/build/init.go

@@ -15,39 +15,11 @@ import (
 	"cache"
 )
 
-// defaultPackages specifies the Package records to be created by initHandler.
-var defaultPackages = []*Package{
-	{Name: "Go", Kind: "go"},
-}
-
-// subRepos specifies the Go project sub-repositories.
-var subRepos = []string{
-	"blog",
-	"codereview",
-	"crypto",
-	"exp",
-	"image",
-	"net",
-	"talks",
-	"tools",
-}
-
-// Put subRepos into defaultPackages.
-func init() {
-	for _, name := range subRepos {
-		p := &Package{
-			Kind: "subrepo",
-			Name: "go." + name,
-			Path: "code.google.com/p/go." + name,
-		}
-		defaultPackages = append(defaultPackages, p)
-	}
-}
-
 func initHandler(w http.ResponseWriter, r *http.Request) {
-	c := appengine.NewContext(r)
+	d := dashboardForRequest(r)
+	c := d.Context(appengine.NewContext(r))
 	defer cache.Tick(c)
-	for _, p := range defaultPackages {
+	for _, p := range d.Packages {
 		err := datastore.Get(c, p.Key(c), new(Package))
 		if _, ok := err.(*datastore.ErrFieldMismatch); ok {
 			// Some fields have been removed, so it's okay to ignore this error.

dashboard/app/build/ui.go

@@ -25,12 +25,15 @@ import (
 )
 
 func init() {
-	http.HandleFunc("/", uiHandler)
+	for _, d := range dashboards {
+		http.HandleFunc(d.RelPath, uiHandler)
+	}
 }
 
 // uiHandler draws the build status page.
 func uiHandler(w http.ResponseWriter, r *http.Request) {
-	c := appengine.NewContext(r)
+	d := dashboardForRequest(r)
+	c := d.Context(appengine.NewContext(r))
 	now := cache.Now(c)
 	const key = "build-ui"
 
@@ -48,7 +51,7 @@ func uiHandler(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	commits, err := goCommits(c, page)
+	commits, err := dashCommits(c, page)
 	if err != nil {
 		logErr(w, r, err)
 		return
@@ -73,7 +76,7 @@ func uiHandler(w http.ResponseWriter, r *http.Request) {
 		p.Prev = page - 1
 		p.HasPrev = true
 	}
-	data := &uiTemplateData{commits, builders, tipState, p}
+	data := &uiTemplateData{d, commits, builders, tipState, p}
 
 	var buf bytes.Buffer
 	if err := uiTemplate.Execute(&buf, data); err != nil {
@@ -94,9 +97,9 @@ type Pagination struct {
 	HasPrev    bool
 }
 
-// goCommits gets a slice of the latest Commits to the Go repository.
+// dashCommits gets a slice of the latest Commits to the current dashboard.
 // If page > 0 it paginates by commitsPerPage.
-func goCommits(c appengine.Context, page int) ([]*Commit, error) {
+func dashCommits(c appengine.Context, page int) ([]*Commit, error) {
 	q := datastore.NewQuery("Commit").
 		Ancestor((&Package{}).Key(c)).
 		Order("-Num").
@@ -166,6 +169,7 @@ func TagStateByName(c appengine.Context, name string) (*TagState, error) {
 }
 
 type uiTemplateData struct {
+	Dashboard  *Dashboard
 	Commits    []*Commit
 	Builders   []string
 	TipState   *TagState
@@ -183,6 +187,7 @@ var tmplFuncs = template.FuncMap{
 	"builderArchChar":  builderArchChar,
 	"builderTitle":     builderTitle,
 	"builderSpans":     builderSpans,
+	"buildDashboards":  buildDashboards,
 	"repoURL":          repoURL,
 	"shortDesc":        shortDesc,
 	"shortHash":        shortHash,
@@ -265,6 +270,11 @@ func builderTitle(s string) string {
 	return strings.Replace(s, "-", " ", -1)
 }
 
+// buildDashboards returns the known public dashboards.
+func buildDashboards() []*Dashboard {
+	return dashboards
+}
+
 // shortDesc returns the first line of a description.
 func shortDesc(desc string) string {
 	if i := strings.Index(desc, "\n"); i != -1 {

dashboard/app/build/ui.html

@@ -1,7 +1,7 @@
 <!DOCTYPE HTML>
 <html>
   <head>
-    <title>Go Build Dashboard</title>
+    <title>{{$.Dashboard.Name}} Build Dashboard</title>
     <style>
       body {
         font-family: sans-serif;
@@ -53,10 +53,10 @@
       .build .desc, .build .time, .build .user {
         white-space: nowrap;
       }
-      .paginate {
+      .dashboards, .paginate {
         padding: 0.5em;
       }
-      .paginate a {
+      .dashboards a, .paginate a {
         padding: 0.5em;
         background: #eee;
         color: blue;
@@ -70,8 +70,12 @@
     </style>
   </head>
   <body>
-
-    <h1>Go Build Status</h1>
+    <h1>{{$.Dashboard.Name}} Build Status</h1>
+    <nav class="dashboards">
+      {{range buildDashboards}}
+        <a href="{{.RelPath}}">{{.Name}}</a>
+      {{end}}
+    </nav>
 
   {{if $.Commits}}
 
@@ -138,6 +142,7 @@
 
   {{with $.TipState}}
     {{$goHash := .Tag.Hash}}
+    {{if .Packages}}
       <h2>
         Sub-repositories at tip
         <small>(<a href="{{repoURL .Tag.Hash ""}}">{{shortHash .Tag.Hash}}</a>)</small>
@@ -204,6 +209,7 @@
     {{end}}
     </table>
    {{end}}
+  {{end}}
 
   </body>
 </html>