diff --git a/scripts/release-manifest.php b/scripts/release-manifest.php
new file mode 100755
index 0000000..5c2a245
--- /dev/null
+++ b/scripts/release-manifest.php
@@ -0,0 +1,263 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * @file
+ * Drupal manifest file creation tool. The manifest file represents
+ * the release history of a Drupal project or module. This tool
+ * helps to build a custom manifest file as the part of the OpenStack
+ * CI process.
+ */
+
+// initial config settings
+$config = array(
+  'manifest-url' => 'http://tarballs.openstack.org/groups/7.x',
+  'debug' => FALSE,
+  'verbose' => FALSE,
+  'outfile' => 'manifest.xml',
+  'help' => FALSE,
+);
+
+// command line argument schema definition
+$arg_schema = array(
+  'version' => array(
+    '#required' => TRUE,
+    '#description' => 'release version (7.x-N.N or 7.x-N.x-dev)',
+  ),
+  'md5' => array(
+    '#required' => TRUE,
+    '#description' => 'basename of release tar.gz file (eg. groups-N.N.tar.gz)',
+  ),
+  'releasetar' => array(
+    '#required' => TRUE,
+    '#description' => 'md5 hash of release tar.gz file',
+  ),
+  'debug' => array(
+    '#required' => FALSE,
+    '#description' => 'enable debug messages, defaults to FALSE',
+  ),
+  'verbose' => array(
+    '#required' => FALSE,
+    '#description' => 'enable verbouse output, defaults to FALSE',
+  ),
+  'manifest-url' => array(
+    '#required' => FALSE,
+    '#description' => 'url of original manifest file',
+  ),
+  'outfile' => array(
+    '#required' => FALSE,
+    '#description' => 'write manifest to this file, defaults to manifest.xml',
+  ),
+  'help' => array(
+    '#required' => FALSE,
+    '#description' => 'Show the help',
+  ),
+);
+
+// manifest template
+$manifest_template = '<?xml version="1.0" encoding="utf-8"?>
+<project xmlns:dc="http://purl.org/dc/elements/1.1/">
+  <title>Groups Portal</title>
+  <short_name>groups</short_name>
+  <type>project_distribution</type>
+  <api_version>7.x</api_version>
+  <recommended_major>0</recommended_major>
+  <supported_majors>0</supported_majors>
+  <default_major>0</default_major>
+  <project_status>published</project_status>
+  <link>https://drupal.org/project/groups</link>
+  <terms>
+    <term>
+      <name>Projects</name>
+      <value>Distributions</value>
+    </term>
+  </terms>
+  <releases>
+  </releases>
+</project>';
+
+// log level constants
+define('_LOG_DEBUG_', 'DEBUG');
+define('_LOG_INFO_', 'INFO');
+define('_LOG_ERROR_', 'ERROR');
+
+/**
+ * Write a log message depending on configuration settings.
+ *
+ * @param  string $type    log level (debug, info, error)
+ * @param  string $message log message
+ */
+function write_log($type, $message) {
+  global $config;
+  if (($type == 'DEBUG') && ($config['debug'] == FALSE)) {
+    // skip if debug mode disabled
+    return;
+  }
+  if (($type == 'INFO') && ($config['verbose'] == FALSE)) {
+    // skip if verbose disabled
+    return;
+  }
+  echo sprintf("%s [%s] %s\n", date('c'), $type, $message);
+}
+
+/**
+ * Validate and decode a Drupal format version string
+ * into a key-value array.
+ *
+ * 7.x-1.0 converted to:
+ * array(
+ *   'major' => 1,
+ *   'patch' => 0,
+ * )
+ *
+ * 7.x-1.x-dev converted to:
+ * array(
+ *   'major' => 1,
+ *   'extra' => 'dev',
+ * )
+ *
+ * @param  string $version version string
+ * @return array           decoded version as key value array
+ */
+function match_version($version) {
+  $pattern = '/^7.x-(?P<major>\d+).((?P<patch>\d+)|x-(?P<extra>dev))$/';
+  $matches = array();
+  if (preg_match($pattern, $version, $matches)) {
+    foreach ($matches as $key => $value) {
+      if ((is_int($key)) || ($value == NULL)) {
+        unset($matches[$key]);
+      }
+    }
+  } else {
+    throw new Exception(sprintf('Invalid version number format: %s', $version));
+  }
+  return $matches;
+}
+
+/**
+ * Insert or update a release element in project xml.
+ *
+ * @param  class $xml          project xml as a simplexml object.
+ * @param  string $version     release version
+ * @param  string $releaseTar  basename of release tar.gz file
+ * @param  string $md5         md5 hash of release tar.gz file
+ * @param  string $fileSize    file size of release (optional)
+ * @param  string $releaseDate release date of the release (optional)
+ */
+function append_release($xml, $version, $releaseTar, $md5, $fileSize = NULL, $releaseDate = NULL) {
+  $downloadUrl = 'http://tarballs.openstack.org/groups/'.$releaseTar;
+  // remove previous release entry with same version
+  list($element) = $xml->xpath('/project/releases/release/version[. = "'.$version.'"]/parent::*');
+  if (!empty($element)) {
+    unset($element[0]);
+    $verb = 'Override';
+  } else {
+    $verb = 'Insert';
+  }
+  write_log(_LOG_INFO_, sprintf('%s a release element [version=%s, releaseTar=%s, md5=%s]',
+    $verb, $version, $releaseTar, $md5));
+  // add release elements
+  $release = $xml->releases->addChild('release');
+  $release->addChild('name', 'groups '.$version);
+  $release->addChild('version', $version);
+  $release->addChild('tag', $version);
+  $release->addChild('status', 'published');
+  $release->addChild('download_link', $downloadUrl);
+  $release->addChild('mdhash', $md5);
+  // append version
+  $v = match_version($version);
+  if (empty($v)) {
+    throw new Exception('Invalid version format.');
+  }
+  foreach ($v as $key => $value) {
+    $release->addChild('version_'.$key, $value);
+  }
+  $files = $release->addChild('files');
+  $file = $files->addChild('file');
+  $file->addChild('url', $downloadUrl);
+  $file->addChild('archive_type', 'tar.gz');
+  $file->addChild('variant', 'full');
+  $file->addChild('md5', $md5);
+}
+
+/**
+ * Show the help and construct parameter list by
+ * argument schema.
+ *
+ * @param  array $arg_schema  argument schema
+ */
+function print_help($arg_schema) {
+  echo "Generate Drupal manifest file to represent a project release history.\n\n";
+  echo "Example:\n";
+  echo "  release-manifest.php --version=7.x-1.0 --releasetar=groups-1.0.tar.gz --md5=c59611415cea4bc6397b1351b2b36b7c\n\n";
+  echo "Options:\n";
+  foreach ($arg_schema as $key => $value) {
+    echo sprintf("  --%-16s  %s\n", $key, $value['#description']);
+  }
+  echo "\n";
+}
+
+/**
+ * Parse and validate command line parameters based on
+ * predefined argument schema.
+ *
+ * @param  array $argv       command line arguments
+ * @param  array $arg_schema argument schema
+ * @return array             parsed parameters
+ */
+function get_cli_parameters($argv, $arg_schema) {
+  $params = array();
+  // parse cli arguments
+  foreach ($argv as $arg) {
+    if (strpos($arg, '--') !== false) {
+      list($key, $value) = explode("=",$arg);
+      $key = substr($key, 2);
+      if (isset($arg_schema[$key]) == FALSE) {
+        print_help($arg_schema);
+        throw new Exception(sprintf('Invalid command line argument: %s', $key));
+      }
+      if (isset($key)) {
+        $params[$key] = isset($value) ? $value : TRUE;
+      }
+    }
+  }
+  if (empty($params['help'])) {
+    // check required parameters
+    foreach ($arg_schema as $key => $value) {
+      if (($value['#required']) && (empty($params[$key]))) {
+        print_help($arg_schema);
+        throw new Exception(sprintf('Mandatory parameter %s missing.', $key));
+      }
+    }
+  }
+  return $params;
+}
+
+try {
+  // parse cli arguments and merge with config
+  $params = get_cli_parameters($argv, $arg_schema);
+  $config = array_replace($config, $params);
+  if ($config['help']) {
+    print_help($arg_schema);
+    exit(0);
+  }
+  if ($config['debug']) {
+    write_log(_LOG_DEBUG_, 'Command line args:');
+    foreach ($config as $key => $value) {
+      write_log(_LOG_DEBUG_, sprintf('  %-16s = %s', $key, (string)$value));
+    }
+  }
+  // load original manifest
+  $xml = @simplexml_load_file($config['manifest-url']);
+  if (!$xml) {
+    write_log(_LOG_INFO_, 'Create a new manifest file, failed to fetch from remote url.');
+    $xml = simplexml_load_string($manifest_template);
+  }
+  append_release($xml, $params['version'], $params['releasetar'], $params['md5']);
+  $xml_content = $xml->asXML();
+  write_log(_LOG_DEBUG_, sprintf("Generated manifest:\n %s", $xml_content));
+  file_put_contents($config['outfile'], $xml_content);
+} catch (Exception $e) {
+  write_log(_LOG_ERROR_, $e->getMessage());
+  exit(1);
+}
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