/**
* Determines the version of LilyPond in use and writes the version
* string to self::$lilypondVersion.
*
* @throws ScoreException if LilyPond could not be executed properly.
*/
private static function getLilypondVersion() {
global $wgScoreLilyPond;
$prof = new ScopedProfiling( __METHOD__ );
if ( !is_executable( $wgScoreLilyPond ) ) {
throw new ScoreException( wfMessage( 'score-notexecutable', $wgScoreLilyPond ) );
}
$cmd = wfEscapeShellArg( $wgScoreLilyPond ) . ' --version 2>&1';
$output = wfShellExec( $cmd, $rc );
if ( $rc != 0 ) {
self::throwCallException( wfMessage( 'score-versionerr' ), $output );
}
$n = sscanf( $output, 'GNU LilyPond %s', self::$lilypondVersion );
if ( $n != 1 ) {
self::$lilypondVersion = null;
self::throwCallException( wfMessage( 'score-versionerr' ), $output );
}
}
