* using $wgLocalisationCacheConf['manualRecache'] = true;
*
* Usage:
- * php rebuildLocalisationCache.php [--force]
+ * php rebuildLocalisationCache.php [--force] [--threads=N]
*
* Use --force to rebuild all files, even the ones that are not out of date.
* Use --threads=N to fork more threads.
* @ingroup Maintenance
*/
-require_once( "Maintenance.php" );
+require_once( dirname( __FILE__ ) . '/Maintenance.php' );
class RebuildLocalisationCache extends Maintenance {
public function __construct() {
$this->addOption( 'force', 'Rebuild all files, even ones not out of date' );
$this->addOption( 'threads', 'Fork more than one thread', false, true );
}
+
+ public function memoryLimit() {
+ return '200M';
+ }
public function execute() {
global $wgLocalisationCacheConf;
- ini_set( 'memory_limit', '200M' );
-
- $force = $this->hasOption('force');
+ $force = $this->hasOption( 'force' );
$threads = $this->getOption( 'threads', 1 );
+ if ( $threads < 1 || $threads != intval( $threads ) ) {
+ $this->output( "Invalid thread count specified; running single-threaded.\n" );
+ $threads = 1;
+ }
+ if ( $threads > 1 && wfIsWindows() ) {
+ $this->output( "Threaded rebuild is not supported on Windows; running single-threaded.\n" );
+ $threads = 1;
+ }
+ if ( $threads > 1 && !function_exists( 'pcntl_fork' ) ) {
+ $this->output( "PHP pcntl extension is not present; running single-threaded.\n" );
+ $threads = 1;
+ }
$conf = $wgLocalisationCacheConf;
$conf['manualRecache'] = false; // Allow fallbacks to create CDB files
// Initialise and split into chunks
$numRebuilt = 0;
- $total = count($codes);
- $chunks = array_chunk( $codes, ceil(count($codes)/$threads) );
+ $total = count( $codes );
+ $chunks = array_chunk( $codes, ceil( count( $codes ) / $threads ) );
$pids = array();
foreach ( $chunks as $codes ) {
// Do not fork for only one thread
$pid = ( $threads > 1 ) ? pcntl_fork() : -1;
if ( $pid === 0 ) {
- // Child
- $this->doRebuild( $codes, $numRebuilt, $lc, $force );
- exit();
- } elseif ($pid === -1) {
+ // Child, reseed because there is no bug in PHP:
+ // http://bugs.php.net/bug.php?id=42465
+ mt_srand( getmypid() );
+ $numRebuilt = $this->doRebuild( $codes, $lc, $force );
+ // Abuse the exit value for the count of rebuild languages
+ exit( $numRebuilt );
+ } elseif ( $pid === -1 ) {
// Fork failed or one thread, do it serialized
- $this->doRebuild( $codes, $numRebuilt, $lc, $force );
+ $numRebuilt += $this->doRebuild( $codes, $lc, $force );
} else {
// Main thread
$pids[] = $pid;
}
}
// Wait for all children
- foreach ( $pids as $pid ) pcntl_waitpid($pid, $status);
+ foreach ( $pids as $pid ) {
+ $status = 0;
+ pcntl_waitpid( $pid, $status );
+ // Fetch the count from the return value
+ $numRebuilt += pcntl_wexitstatus( $status );
+ }
$this->output( "$numRebuilt languages rebuilt out of $total\n" );
- if ( $numRebuilt == 0 ) {
+ if ( $numRebuilt === 0 ) {
$this->output( "Use --force to rebuild the caches which are still fresh.\n" );
}
}
/**
- * Rebuild language cache
- * @todo Document
+ * Helper function to rebuild list of languages codes. Prints the code
+ * for each language which is rebuilt.
+ * @param $codes list List of language codes to rebuild.
+ * @param $lc object Instance of LocalisationCache_BulkLoad (?)
+ * @param $force bool Rebuild up-to-date languages
+ * @return int Number of rebuilt languages
*/
- private function doRebuild( $codes, &$numRebuilt, $lc, $force ) {
+ private function doRebuild( $codes, $lc, $force ) {
+ $numRebuilt = 0;
foreach ( $codes as $code ) {
if ( $force || $lc->isExpired( $code ) ) {
$this->output( "Rebuilding $code...\n" );
$numRebuilt++;
}
}
+ return $numRebuilt;
}
}