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<?php
/**
* Check syntax of all PHP files in MediaWiki
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Maintenance
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script to check syntax of all PHP files in MediaWiki.
*
* @ingroup Maintenance
*/
class CheckSyntax extends Maintenance {
// List of files we're going to check
private $mFiles = [], $mFailures = [], $mWarnings = [];
private $mIgnorePaths = [], $mNoStyleCheckPaths = [];
public function __construct() {
parent::__construct();
$this->addDescription( 'Check syntax for all PHP files in MediaWiki' );
$this->addOption( 'with-extensions', 'Also recurse the extensions folder' );
$this->addOption(
'path',
'Specific path (file or directory) to check, either with absolute path or '
. 'relative to the root of this MediaWiki installation',
false,
true
);
$this->addOption(
'list-file',
'Text file containing list of files or directories to check',
false,
true
);
$this->addOption(
'modified',
'Check only files that were modified (requires Git command-line client)'
);
$this->addOption( 'syntax-only', 'Check for syntax validity only, skip code style warnings' );
}
public function getDbType() {
return Maintenance::DB_NONE;
}
public function execute() {
$this->buildFileList();
$this->output( "Checking syntax (using php -l, this can take a long time)\n" );
foreach ( $this->mFiles as $f ) {
$this->checkFileWithCli( $f );
if ( !$this->hasOption( 'syntax-only' ) ) {
$this->checkForMistakes( $f );
}
}
$this->output( "\nDone! " . count( $this->mFiles ) . " files checked, " .
count( $this->mFailures ) . " failures and " . count( $this->mWarnings ) .
" warnings found\n" );
}
/**
* Build the list of files we'll check for syntax errors
*/
private function buildFileList() {
global $IP;
$this->mIgnorePaths = [
];
$this->mNoStyleCheckPaths = [
// Third-party code we don't care about
"/activemq_stomp/",
"EmailPage/PHPMailer",
"FCKeditor/fckeditor/",
'\bphplot-',
"/svggraph/",
"\bjsmin.php$",
"PEAR/File_Ogg/",
"QPoll/Excel/",
"/geshi/",
"/smarty/",
];
if ( $this->hasOption( 'path' ) ) {
$path = $this->getOption( 'path' );
if ( !$this->addPath( $path ) ) {
$this->error( "Error: can't find file or directory $path\n", true );
}
return; // process only this path
} elseif ( $this->hasOption( 'list-file' ) ) {
$file = $this->getOption( 'list-file' );
MediaWiki\suppressWarnings();
$f = fopen( $file, 'r' );
MediaWiki\restoreWarnings();
if ( !$f ) {
$this->error( "Can't open file $file\n", true );
}
$path = trim( fgets( $f ) );
while ( $path ) {
$this->addPath( $path );
}
fclose( $f );
return;
} elseif ( $this->hasOption( 'modified' ) ) {
$this->output( "Retrieving list from Git... " );
$files = $this->getGitModifiedFiles( $IP );
$this->output( "done\n" );
foreach ( $files as $file ) {
if ( $this->isSuitableFile( $file ) && !is_dir( $file ) ) {
$this->mFiles[] = $file;
}
}
return;
}
$this->output( 'Building file list...', 'listfiles' );
// Only check files in these directories.
// Don't just put $IP, because the recursive dir thingie goes into all subdirs
$dirs = [
$IP . '/includes',
$IP . '/mw-config',
$IP . '/languages',
$IP . '/maintenance',
$IP . '/skins',
];
if ( $this->hasOption( 'with-extensions' ) ) {
$dirs[] = $IP . '/extensions';
}
foreach ( $dirs as $d ) {
$this->addDirectoryContent( $d );
}
// Manually add two user-editable files that are usually sources of problems
if ( file_exists( "$IP/LocalSettings.php" ) ) {
$this->mFiles[] = "$IP/LocalSettings.php";
}
$this->output( 'done.', 'listfiles' );
}
/**
* Returns a list of tracked files in a Git work tree differing from the master branch.
* @param string $path Path to the repository
* @return array Resulting list of changed files
*/
private function getGitModifiedFiles( $path ) {
global $wgMaxShellMemory;
if ( !is_dir( "$path/.git" ) ) {
$this->error( "Error: Not a Git repository!\n", true );
}
// git diff eats memory.
$oldMaxShellMemory = $wgMaxShellMemory;
if ( $wgMaxShellMemory < 1024000 ) {
$wgMaxShellMemory = 1024000;
}
$ePath = wfEscapeShellArg( $path );
// Find an ancestor in common with master (rather than just using its HEAD)
// to prevent files only modified there from showing up in the list.
$cmd = "cd $ePath && git merge-base master HEAD";
$retval = 0;
$output = wfShellExec( $cmd, $retval );
if ( $retval !== 0 ) {
$this->error( "Error retrieving base SHA1 from Git!\n", true );
}
// Find files in the working tree that changed since then.
$eBase = wfEscapeShellArg( rtrim( $output, "\n" ) );
$cmd = "cd $ePath && git diff --name-only --diff-filter AM $eBase";
$retval = 0;
$output = wfShellExec( $cmd, $retval );
if ( $retval !== 0 ) {
$this->error( "Error retrieving list from Git!\n", true );
}
$wgMaxShellMemory = $oldMaxShellMemory;
$arr = [];
$filename = strtok( $output, "\n" );
while ( $filename !== false ) {
if ( $filename !== '' ) {
$arr[] = "$path/$filename";
}
$filename = strtok( "\n" );
}
return $arr;
}
/**
* Returns true if $file is of a type we can check
* @param string $file
* @return bool
*/
private function isSuitableFile( $file ) {
$file = str_replace( '\\', '/', $file );
$ext = pathinfo( $file, PATHINFO_EXTENSION );
if ( $ext != 'php' && $ext != 'inc' && $ext != 'php5' ) {
return false;
}
foreach ( $this->mIgnorePaths as $regex ) {
$m = [];
if ( preg_match( "~{$regex}~", $file, $m ) ) {
return false;
}
}
return true;
}
/**
* Add given path to file list, searching it in include path if needed
* @param string $path
* @return bool
*/
private function addPath( $path ) {
global $IP;
return $this->addFileOrDir( $path ) || $this->addFileOrDir( "$IP/$path" );
}
/**
* Add given file to file list, or, if it's a directory, add its content
* @param string $path
* @return bool
*/
private function addFileOrDir( $path ) {
if ( is_dir( $path ) ) {
$this->addDirectoryContent( $path );
} elseif ( file_exists( $path ) ) {
$this->mFiles[] = $path;
} else {
return false;
}
return true;
}
/**
* Add all suitable files in given directory or its subdirectories to the file list
*
* @param string $dir Directory to process
*/
private function addDirectoryContent( $dir ) {
$iterator = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator( $dir ),
RecursiveIteratorIterator::SELF_FIRST
);
foreach ( $iterator as $file ) {
if ( $this->isSuitableFile( $file->getRealPath() ) ) {
$this->mFiles[] = $file->getRealPath();
}
}
}
/**
* Check a file for syntax errors using php -l
* @param string $file Path to a file to check for syntax errors
* @return bool
*/
private function checkFileWithCli( $file ) {
$res = exec( 'php -l ' . wfEscapeShellArg( $file ) );
if ( strpos( $res, 'No syntax errors detected' ) === false ) {
$this->mFailures[$file] = $res;
$this->output( $res . "\n" );
return false;
}
return true;
}
/**
* Check a file for non-fatal coding errors, such as byte-order marks in the beginning
* or pointless ?> closing tags at the end.
*
* @param string $file String Path to a file to check for errors
*/
private function checkForMistakes( $file ) {
foreach ( $this->mNoStyleCheckPaths as $regex ) {
$m = [];
if ( preg_match( "~{$regex}~", $file, $m ) ) {
return;
}
}
$text = file_get_contents( $file );
$tokens = token_get_all( $text );
$this->checkEvilToken( $file, $tokens, '@', 'Error supression operator (@)' );
$this->checkRegex( $file, $text, '/^[\s\r\n]+<\?/', 'leading whitespace' );
$this->checkRegex( $file, $text, '/\?>[\s\r\n]*$/', 'trailing ?>' );
$this->checkRegex( $file, $text, '/^[\xFF\xFE\xEF]/', 'byte-order mark' );
}
private function checkRegex( $file, $text, $regex, $desc ) {
if ( !preg_match( $regex, $text ) ) {
return;
}
if ( !isset( $this->mWarnings[$file] ) ) {
$this->mWarnings[$file] = [];
}
$this->mWarnings[$file][] = $desc;
$this->output( "Warning in file $file: $desc found.\n" );
}
private function checkEvilToken( $file, $tokens, $evilToken, $desc ) {
if ( !in_array( $evilToken, $tokens ) ) {
return;
}
if ( !isset( $this->mWarnings[$file] ) ) {
$this->mWarnings[$file] = [];
}
$this->mWarnings[$file][] = $desc;
$this->output( "Warning in file $file: $desc found.\n" );
}
}
$maintClass = "CheckSyntax";
require_once RUN_MAINTENANCE_IF_MAIN;