public function execute()
 {
     $groupIds = explode(',', trim($this->getOption('group')));
     $groupIds = MessageGroups::expandWildcards($groupIds);
     $groups = MessageGroups::getGroupsById($groupIds);
     if (!count($groups)) {
         $this->error("ESG2: No valid message groups identified.", 1);
     }
     $start = $this->getOption('start') ? strtotime($this->getOption('start')) : false;
     $end = $this->getOption('end') ? strtotime($this->getOption('end')) : false;
     $this->output("Conflict times: " . wfTimestamp(TS_ISO_8601, $start) . " - " . wfTimestamp(TS_ISO_8601, $end) . "\n");
     $codes = array_filter(array_map('trim', explode(',', $this->getOption('lang'))));
     $supportedCodes = array_keys(TranslateUtils::getLanguageNames('en'));
     ksort($supportedCodes);
     if ($codes[0] === '*') {
         $codes = $supportedCodes;
     }
     /** @var FileBasedMessageGroup $group */
     foreach ($groups as $groupId => &$group) {
         if ($group->isMeta()) {
             $this->output("Skipping meta message group {$groupId}.\n");
             continue;
         }
         $this->output("{$group->getLabel()} ", $group);
         foreach ($codes as $code) {
             // No sync possible for unsupported language codes.
             if (!in_array($code, $supportedCodes)) {
                 $this->output("Unsupported code " . $code . ": skipping.\n");
                 continue;
             }
             $file = $group->getSourceFilePath($code);
             if (!$file) {
                 continue;
             }
             if (!file_exists($file)) {
                 continue;
             }
             $cs = new ChangeSyncer($group, $this);
             $cs->setProgressCallback(array($this, 'myOutput'));
             $cs->interactive = !$this->hasOption('noask');
             $cs->nocolor = $this->hasOption('nocolor');
             $cs->norc = $this->hasOption('norc');
             # @todo FIXME: Make this auto detect.
             # Guess last modified date of the file from either git, svn or filesystem
             if ($this->hasOption('git')) {
                 $ts = $cs->getTimestampsFromGit($file);
             } else {
                 $ts = $cs->getTimestampsFromSvn($file);
             }
             if (!$ts) {
                 $ts = $cs->getTimestampsFromFs($file);
             }
             $this->output("Modify time for {$code}: " . wfTimestamp(TS_ISO_8601, $ts) . "\n");
             $cs->checkConflicts($code, $start, $end, $ts);
         }
         unset($group);
     }
     // Print timestamp if the user wants to store it
     $this->output(wfTimestamp(TS_RFC2822) . "\n");
 }
		if ( $group instanceof FileBasedMessageGroup ) {
			$file = $group->getSourceFilePath( $code );
		} else {
			$file = $group->getMessageFileWithPath( $code );
		}

		if ( !$file ) {
			continue;
		}

		if ( !file_exists( $file ) ) {
			continue;
		}

		$cs = new ChangeSyncer( $group );
		if ( isset( $options['norc'] ) ) {
			$cs->norc = true;
		}

		if ( isset( $options['noask'] ) ) {
			$cs->interactive = false;
		}

		if ( isset( $options['nocolor'] ) ) {
			$cs->nocolor = true;
		}

		$ts = $cs->getTimestampsFromSvn( $file );
		if ( !$ts ) {
			$ts = $cs->getTimestampsFromFs( $file );