diff -r d6541118228c drush_make.download.inc
--- drush_make.download.inc	Thu Aug 25 12:46:51 2011 +0100
+++ drush_make.download.inc	Thu Aug 25 13:02:29 2011 +0100
@@ -499,6 +499,125 @@
   return FALSE;
 }
 
+function drush_make_download_hg($name, $download, $download_location) {
+  $tmp_path = drush_make_tmp();
+  $wc = drush_get_option('working-copy');
+
+  // check if branch option is set in info file, otherwise set default to master branch
+//  $download['branch'] = isset($download['branch']) ? $download['branch'] : 'master';
+
+  if(isset($download['branch'])) {
+          drush_make_error('DOWNLOAD_ERROR', dt('Branches not (yet) supported in Hg downloads'));
+          return false;
+  }
+
+  // check if tag option is set in info file, otherwise we set it to false
+  $download['tag'] = isset($download['tag']) ? $download['tag'] : FALSE;
+  // check if specific revision is set in info file
+  $download['revision'] = isset($download['revision']) ? $download['revision'] : FALSE;
+
+  $updateRevision = 'tip'; // default
+
+  if($download['revision']) {
+    if($download['tag']) {
+         drush_make_error('DOWNLOAD_ERROR', dt('tag and revision are aliases; specify at most one'));
+          return false;
+    }
+    $updateRevision = $download['revision'];
+  } else if($download['tag']) {
+      $updateRevision = $download['tag'];
+  }
+
+  if (!isset($download['url'])) {
+          drush_make_error('DOWNLOAD_ERROR', dt('URL is required in Hg downloads'));
+          return false;
+  }
+
+  if(isset($download['submodule'])) {
+        drush_make_error('DOWNLOAD_ERROR', dt('submodule not supported in Hg downloads'));
+          return false;
+  }
+
+  // split the given download url into pieces
+  $url_array = array();
+
+  // Get the protocol, site and resource parts of the URL
+  // original url = http://example.com/blog/index?name=foo
+  // protocol = http://
+  // site = example.com/
+  // resource = blog/index?name=foo
+  $regex = '#^(.*?//)*(.*@)*([\w\.\d]*)(:(\d+))*(/*)(.*)$#';
+  $matches = array();
+  preg_match($regex, $download['url'], $matches);
+  // Assign the matched parts of url to the result array
+  $url_array['protocol'] = $matches[1];
+  $url_array['user']     = $matches[2];
+  $url_array['port']     = $matches[5];
+  $url_array['host']     = $matches[3];
+  $url_array['resource'] = $matches[7];
+
+  // clean up the site portion by removing the trailing /
+  $url_array['host'] = preg_replace('#/$#', '', $url_array['host']);
+
+  // clean up the protocol portion by removing the trailing ://
+  $url_array['protocol'] = preg_replace('#://$#', '', $url_array['protocol']);
+
+  if (empty($url_array['protocol'])) {
+    // If protocol is not given, assume an SSH URL.
+    $url = $download['url'];
+  }
+  else {
+    // build url for git clone to support different protocols
+    // currently all protocols seems to use the same url schema
+    switch ($url_array['protocol']) {
+      case 'ssh':
+      case 'http':
+      case 'https':
+//      case 'ftp':
+//      case 'ftps':
+//      case 'rsync':
+      case 'file':
+        // @TODO: implement port & user options
+        $url = $url_array['protocol'] .'://'. $url_array['user'] . $url_array['host'] .'/'. $url_array['resource'];
+        break;
+
+      default:
+        drush_make_error('DOWNLOAD_ERROR', dt('unknown protocol @protocol in %project', array('@protocol' => $url_array['protocol'], '%project' => $name)));
+        return false;
+    }
+  }
+
+  $tmp_location = $tmp_path . '/__hg__/' . basename($download_location);
+
+  drush_make_mkdir($tmp_path . '/__hg__/');
+
+  // clone the given repository, and update to specified tag.
+    // Done in 2 steps because using hg clone -u (lowercase) fails to fail on nonexistent tags
+  if (
+    drush_shell_exec("hg clone -U %s %s", $url, $tmp_location) &&
+    drush_shell_exec("hg -R %s up -r %s", $tmp_location, $updateRevision)
+    ) {
+    drush_log(dt('%project cloned from %url; rev %rev.', array('%project' => $name, '%url' => $url, '%rev'=> $updateRevision)), 'ok');
+
+    //TODO Add branch / tag / rev handling here/above later (tags most likely to de needed)
+
+
+    // Remove .hg/ directory if working-copy flag was not specified.
+    if (!$wc && file_exists($tmp_location . '/.hg')) {
+      drush_shell_exec("rm -rf %s", $tmp_location . '/.hg');
+    }
+    drush_shell_exec('cp -Rf %s %s', $tmp_location, dirname($download_location));
+    drush_shell_exec("rm -rf %s", dirname($tmp_location));
+    return dirname($tmp_location);
+  } else {
+    drush_make_error('DOWNLOAD_ERROR', dt('Unable to clone %project from %url at revision/tag %rev.', array('%project' => $name, '%url' => $url, '%rev'=> $updateRevision)));
+  }
+
+  return FALSE;
+}
+
+
+
 function drush_make_download_bzr($name, $download, $download_location) {
   $tmp_path = drush_make_tmp();
   $tmp_location = $tmp_path . '/__bzr__/' . basename($download_location);