* Store build duration, handle cached builds.

src/HydraFrontend/root/build.tt

@@ -12,7 +12,7 @@
   </tr>
   <tr>
     <th>Job name:</th>
-    <td>[% build.name %]</td>
+    <td>[% build.jobname %]</td>
   </tr>
   <tr>
     <th>Description:</th>
@@ -22,6 +22,16 @@
     <th>Time added:</th>
     <td>[% date.format(build.timestamp, '%Y-%m-%d %H:%M:%S') %]</td>
   </tr>
+  <tr>
+    <th>Duration (seconds):</th>
+    <td>
+      [% IF build.iscachedbuild %]
+        <em>(cached build)</em>
+      [% ELSE %]
+        [% build.stoptime - build.starttime %]
+      [% END %]
+    </td>
+  </tr>
   <tr>
     <th>Derivation store path:</th>
     <td><tt>[% build.drvpath %]</tt></td>

src/HydraFrontend/root/index.tt

@@ -2,6 +2,8 @@
 
 <h1>Job status</h1>
 
+<p>Below are the latest builds for each job.</p>
+
 <table class="tablesorter">
   <thead>
     <tr><th></th><th>Id</th><th>Job</th><th>Timestamp</th><th>Description</th></tr>

src/HydraFrontend/root/short-build-info.tt

@@ -9,7 +9,7 @@
     [% END %]
   </td>
   <td><a href="[% c.uri_for('/build' build.id) %]">[% build.id %]</a></td>
-  <td><a href="[% c.uri_for('/job' build.name) %]"><tt>[% build.name %]</tt></a></td>
+  <td><a href="[% c.uri_for('/job' build.jobname) %]"><tt>[% build.jobname %]</tt></a></td>
   <td>[% date.format(build.timestamp, '%Y-%m-%d %H:%M:%S') %]</td>
   <td>[% build.description %]</td>
 </tr>