Fix displaying no-builds and not-active errors

This commit unifies the behaviour of displaying no-builds and not-active
errors for repo and fixes the error when user can't access repo settings
when the project is not active.

app/routes/repo/index.js

@@ -7,14 +7,41 @@ export default TravisRoute.extend({
     return this.controllerFor('repo').activate('current');
   },
 
-  renderTemplate() {
-    return this.render('build');
-  },
   deactivate() {
     var repo;
     repo = this.controllerFor('repo');
     this.controllerFor('build').set('build', null);
     this.controllerFor('job').set('job', null);
+    this.stopObservingRepoStatus();
     return this._super.apply(this, arguments);
+  },
+
+  activate() {
+    this.observeRepoStatus();
+    return this._super.apply(this, arguments);
+  },
+
+  observeRepoStatus() {
+    let controller = this.controllerFor('repo');
+    controller.addObserver('repo.active', this, 'renderTemplate');
+    controller.addObserver('repo.lastBuildId', this, 'renderTemplate');
+  },
+
+  stopObservingRepoStatus() {
+    let controller = this.controllerFor('repo');
+    controller.removeObserver('repo.active', this, 'renderTemplate');
+    controller.removeObserver('repo.lastBuildId', this, 'renderTemplate');
+  },
+
+  renderTemplate() {
+    let controller = this.controllerFor('repo');
+
+    if(!controller.get('repo.active')) {
+      this.render('repo/not-active');
+    } else if(!controller.get('repo.lastBuildId')) {
+      this.render('repo/no-build');
+    } else {
+      this.render('build');
+    }
   }
 });

app/templates/branches.hbs

@@ -1,3 +1,4 @@
+{{#if defaultBranch}}
   <div class="branches">
     <section>
       <h2 class="small-title">Default Branch</h2>
@@ -28,3 +29,6 @@
       </section>
     {{/if}}
   </div>
+{{else}}
+  {{no-builds}}
+{{/if}}

app/templates/repo.hbs

@@ -23,15 +23,7 @@
           {{repo-show-tabs repo=repo tab=tab build=build job=job}}
         </div>
         <div class="tabbody repo-body">
-          {{#if showCurrentBuild}}
           {{outlet}}
-          {{else}}
-            {{#if repo.lastBuildId}}
-              {{not-active user=currentUser repo=repo}}
-            {{else}}
-              {{no-builds}}
-            {{/if}}
-          {{/if}}
         </div>
       </main>
     </article>

app/templates/repo/no-build.hbs

@@ -0,0 +1 @@
+{{no-builds}}

app/templates/repo/not-active.hbs

@@ -0,0 +1 @@
+{{not-active user=currentUser repo=repo}}