go.tools/dashboard/app: show sub-repository build history

LGTM=cmang
R=adonovan, gobot, cmang
CC=golang-codereviews
https://golang.org/cl/56410043

dashboard/app/build/build.go

@@ -162,11 +162,11 @@ func (c *Commit) Result(builder, goHash string) *Result {
 	return nil
 }
 
-// Results returns the build Results for this Commit for the given goHash.
-func (c *Commit) Results(goHash string) (results []*Result) {
+// Results returns the build Results for this Commit.
+func (c *Commit) Results() (results []*Result) {
 	for _, r := range c.ResultData {
 		p := strings.SplitN(r, "|", 4)
-		if len(p) != 4 || p[3] != goHash {
+		if len(p) != 4 {
 			continue
 		}
 		results = append(results, partsToHash(c, p))
@@ -174,6 +174,39 @@ func (c *Commit) Results(goHash string) (results []*Result) {
 	return
 }
 
+func (c *Commit) ResultGoHashes() []string {
+	var hashes []string
+	for _, r := range c.ResultData {
+		p := strings.SplitN(r, "|", 4)
+		if len(p) != 4 {
+			continue
+		}
+		// Append only new results (use linear scan to preserve order).
+		if !contains(hashes, p[3]) {
+			hashes = append(hashes, p[3])
+		}
+	}
+	// Return results in reverse order (newest first).
+	reverse(hashes)
+	return hashes
+}
+
+func contains(t []string, s string) bool {
+	for _, s2 := range t {
+		if s2 == s {
+			return true
+		}
+	}
+	return false
+}
+
+func reverse(s []string) {
+	for i := 0; i < len(s)/2; i++ {
+		j := len(s) - i - 1
+		s[i], s[j] = s[j], s[i]
+	}
+}
+
 // partsToHash converts a Commit and ResultData substrings to a Result.
 func partsToHash(c *Commit, p []string) *Result {
 	return &Result{

dashboard/app/build/ui.go

@@ -41,9 +41,11 @@ func uiHandler(w http.ResponseWriter, r *http.Request) {
 	if page < 0 {
 		page = 0
 	}
+	repo := r.FormValue("repo")
+	useCache := page == 0 && repo == ""
 
 	// Used cached version of front page, if available.
-	if page == 0 {
+	if useCache {
 		var b []byte
 		if cache.Get(r, now, key, &b) {
 			w.Write(b)
@@ -51,16 +53,25 @@ func uiHandler(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	commits, err := dashCommits(c, page)
+	pkg := &Package{} // empty package is the main repository
+	if repo != "" {
+		var err error
+		pkg, err = GetPackage(c, repo)
+		if err != nil {
+			logErr(w, r, err)
+			return
+		}
+	}
+	commits, err := dashCommits(c, pkg, page)
 	if err != nil {
 		logErr(w, r, err)
 		return
 	}
-	builders := commitBuilders(commits, "")
+	builders := commitBuilders(commits)
 
 	var tipState *TagState
-	if page == 0 {
-		// only show sub-repo state on first page
+	if pkg.Kind == "" && page == 0 {
+		// only show sub-repo state on first page of normal repo view
 		tipState, err = TagStateByName(c, "tip")
 		if err != nil {
 			logErr(w, r, err)
@@ -76,7 +87,7 @@ func uiHandler(w http.ResponseWriter, r *http.Request) {
 		p.Prev = page - 1
 		p.HasPrev = true
 	}
-	data := &uiTemplateData{d, commits, builders, tipState, p}
+	data := &uiTemplateData{d, pkg, commits, builders, tipState, p}
 
 	var buf bytes.Buffer
 	if err := uiTemplate.Execute(&buf, data); err != nil {
@@ -85,7 +96,7 @@ func uiHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Cache the front page.
-	if page == 0 {
+	if useCache {
 		cache.Set(r, now, key, buf.Bytes())
 	}
 
@@ -99,9 +110,9 @@ type Pagination struct {
 
 // dashCommits gets a slice of the latest Commits to the current dashboard.
 // If page > 0 it paginates by commitsPerPage.
-func dashCommits(c appengine.Context, page int) ([]*Commit, error) {
+func dashCommits(c appengine.Context, pkg *Package, page int) ([]*Commit, error) {
 	q := datastore.NewQuery("Commit").
-		Ancestor((&Package{}).Key(c)).
+		Ancestor(pkg.Key(c)).
 		Order("-Num").
 		Limit(commitsPerPage).
 		Offset(page * commitsPerPage)
@@ -112,10 +123,10 @@ func dashCommits(c appengine.Context, page int) ([]*Commit, error) {
 
 // commitBuilders returns the names of the builders that provided
 // Results for the provided commits.
-func commitBuilders(commits []*Commit, goHash string) []string {
+func commitBuilders(commits []*Commit) []string {
 	builders := make(map[string]bool)
 	for _, commit := range commits {
-		for _, r := range commit.Results(goHash) {
+		for _, r := range commit.Results() {
 			builders[r.Builder] = true
 		}
 	}
@@ -211,6 +222,7 @@ func TagStateByName(c appengine.Context, name string) (*TagState, error) {
 
 type uiTemplateData struct {
 	Dashboard  *Dashboard
+	Package    *Package
 	Commits    []*Commit
 	Builders   []string
 	TipState   *TagState

dashboard/app/build/ui.html

@@ -76,11 +76,12 @@
         <a href="{{.RelPath}}">{{.Name}}</a>
       {{end}}
     </nav>
+    {{with $.Package.Name}}<h2>{{.}}</h2>{{end}}
 
   {{if $.Commits}}
 
     <table class="build">
-      <colgroup class="col-hash"></colgroup>
+      <colgroup class="col-hash" {{if $.Package.Path}}span="2"{{end}}></colgroup>
     {{range $.Builders | builderSpans}}
       <colgroup class="col-result" span="{{.N}}"></colgroup>
     {{end}}
@@ -91,7 +92,11 @@
         <!-- extra row to make alternating colors use dark for first result -->
       </tr>
       <tr>
+    {{if $.Package.Path}}
+        <th colspan="2">revision</th>
+    {{else}}
         <th>&nbsp;</th>
+    {{end}}
     {{range $.Builders | builderSpans}}
         <th colspan="{{.N}}">{{.OS}}</th>
     {{end}}
@@ -100,38 +105,58 @@
         <th></th>
       </tr>
       <tr>
+    {{if $.Package.Path}}
+        <th class="result arch">repo</th>
+        <th class="result arch">{{$.Dashboard.Name}}</th>
+    {{else}}
         <th>&nbsp;</th>
+    {{end}}
     {{range $.Builders}}
         <th class="result arch" title="{{.}}">{{builderSubheading .}}</th>
     {{end}}
       </tr>
     {{range $c := $.Commits}}
-      <tr class="commit">
-        <td class="hash"><a href="{{repoURL $.Dashboard.Name .Hash ""}}">{{shortHash .Hash}}</a></td>
-        {{range $.Builders}}
-          <td class="result">
-            {{with $c.Result . ""}}
-              {{if .OK}}
-                <span class="ok">ok</span>
-              {{else}}
-                <a href="{{$.Dashboard.RelPath}}log/{{.LogHash}}" class="fail">fail</a>
-              {{end}}
-            {{else}}
-              &nbsp;
-            {{end}}
-          </td>
+      {{range $i, $h := $c.ResultGoHashes}}
+        <tr class="commit">
+        {{if $i}}
+          <td>&nbsp;</td>
+        {{else}}
+          <td class="hash"><a href="{{repoURL $.Dashboard.Name $c.Hash $.Package.Path}}">{{shortHash $c.Hash}}</a></td>
         {{end}}
-        <td class="user" title="{{.User}}">{{shortUser .User}}</td>
-        <td class="time">{{.Time.Format "Mon 02 Jan 15:04"}}</td>
-        <td class="desc" title="{{.Desc}}">{{shortDesc .Desc}}</td>
-      </tr>
+        {{if $h}} 
+          <td class="hash"><a href="{{repoURL $.Dashboard.Name $h ""}}">{{shortHash $h}}</a></td>
+        {{end}}
+          {{range $.Builders}}
+            <td class="result">
+              {{with $c.Result . $h}}
+                {{if .OK}}
+                  <span class="ok">ok</span>
+                {{else}}
+                  <a href="{{$.Dashboard.RelPath}}log/{{.LogHash}}" class="fail">fail</a>
+                {{end}}
+              {{else}}
+                &nbsp;
+              {{end}}
+            </td>
+          {{end}}
+        {{if $i}}
+          <td>&nbsp;</td>
+          <td>&nbsp;</td>
+          <td>&nbsp;</td>
+        {{else}}
+          <td class="user" title="{{$c.User}}">{{shortUser $c.User}}</td>
+          <td class="time">{{$c.Time.Format "Mon 02 Jan 15:04"}}</td>
+          <td class="desc" title="{{$c.Desc}}">{{shortDesc $c.Desc}}</td>
+        {{end}}
+        </tr>
+      {{end}}
     {{end}}
     </table>
 
     {{with $.Pagination}}
     <div class="paginate">
-      <a {{if .HasPrev}}href="?page={{.Prev}}"{{else}}class="inactive"{{end}}>newer</a>
-      <a {{if .Next}}href="?page={{.Next}}"{{else}}class="inactive"{{end}}>older</a>
+      <a {{if .HasPrev}}href="?{{with $.Package.Path}}repo={{.}}&{{end}}page={{.Prev}}"{{else}}class="inactive"{{end}}>newer</a>
+      <a {{if .Next}}href="?{{with $.Package.Path}}repo={{.}}&{{end}}page={{.Next}}"{{else}}class="inactive"{{end}}>older</a>
       <a {{if .HasPrev}}href="."{{else}}class="inactive"{{end}}>latest</a>
     </div>
     {{end}}
@@ -182,7 +207,7 @@
       </tr>
     {{range $pkg := .Packages}}
       <tr class="commit">
-        <td><a title="{{.Package.Path}}">{{.Package.Name}}</a></td>
+        <td><a title="{{.Package.Path}}" href="?repo={{.Package.Path}}">{{.Package.Name}}</a></td>
         <td class="hash">
           {{$h := $pkg.Commit.Hash}}
           <a href="{{repoURL $.Dashboard.Name $h $pkg.Commit.PackagePath}}">{{shortHash $h}}</a>