Output the branch a particular commit is on; this is easy for

mercurial and monotone, but slightly harder till impossible to
do properly for git and svn. Please review and eventually adapt
the code to make it work better (partially fixes issue 450)

src/IDF/Scm/Git.php

@@ -436,6 +436,8 @@ class IDF_Scm_Git extends IDF_Scm
             $out = self::parseLog($out);
             $out[0]->changes = '';
         }
+
+        $out[0]['branch'] = $this->inBranches($commit, null);
         return $out[0];
     }
 

src/IDF/Scm/Mercurial.php

@@ -429,6 +429,8 @@ class IDF_Scm_Mercurial extends IDF_Scm
                     $c['author'] = $match[2];
                 } elseif ($match[1] == 'summary') {
                     $c['title'] = $match[2];
+                } elseif ($match[1] == 'branch') {
+                    $c['branch'] = $match[2];
                 } else {
                     $c[$match[1]] = trim($match[2]);
                 }
@@ -443,6 +445,7 @@ class IDF_Scm_Mercurial extends IDF_Scm
             }
         }
         $c['tree'] = !empty($c['commit']) ? trim($c['commit']) : '';
+        $c['branch'] = empty($c['branch']) ? 'default' : $c['branch'];
         $c['full_message'] = !empty($c['full_message']) ? trim($c['full_message']) : '';
         $res[] = (object) $c;
         return $res;

src/IDF/Scm/Monotone.php

@@ -623,7 +623,9 @@ class IDF_Scm_Monotone extends IDF_Scm
         $res['title'] = $split[0];
         $res['full_message'] = (isset($split[1])) ? trim($split[1]) : '';
 
+        $res['branch'] = implode(', ', $certs['branch']);
         $res['commit'] = $revs[0];
+
         $res['changes'] = ($getdiff) ? $this->_getDiff($revs[0]) : '';
 
         return (object) $res;

src/IDF/Scm/Svn.php

@@ -415,6 +415,7 @@ class IDF_Scm_Svn extends IDF_Scm
         $res['commit'] = (string) $xml->logentry['revision'];
         $res['changes'] = ($getdiff) ? $this->getDiff($commit) : '';
         $res['tree'] = '';
+        $res['branch'] = '';
         return (object) $res;
     }
 

src/IDF/templates/idf/source/commit.html

@@ -10,6 +10,9 @@
 <th><strong>{trans 'Author:'}</strong></th><td>{showuser $rcommit.get_author(), $request, $cobject.author}</td>
 </tr>
 <tr>
+<th><strong>{trans 'Branch:'}</strong></th><td>{$cobject.branch}</td>
+</tr>
+<tr>
 <th><strong>{trans 'Commit:'}</strong></th><td class="mono"><a href="{url 'IDF_Views_Source::treeBase', array($project.shortname, $commit)}" title="{trans 'View corresponding source tree'}">{$cobject.commit}</a></td>
 </tr>
 <tr>