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<?php
/**
* 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
*/
use MediaWiki\Json\FormatJson;
/**
* Accepts a list of files and directories to search for
* php files and generates $wgAutoloadLocalClasses or $wgAutoloadClasses
* lines for all detected classes. These lines are written out
* to an autoload.php file in the projects provided basedir.
*
* Usage:
*
* $gen = new AutoloadGenerator( __DIR__ );
* $gen->readDir( __DIR__ . '/includes' );
* $gen->readFile( __DIR__ . '/foo.php' )
* $gen->getAutoload();
*/
class AutoloadGenerator {
private const FILETYPE_JSON = 'json';
private const FILETYPE_PHP = 'php';
/**
* @var string Root path of the project being scanned for classes
*/
protected $basepath;
/**
* @var ClassCollector Helper class extracts class names from php files
*/
protected $collector;
/**
* @var array Map of file shortpath to list of FQCN detected within file
*/
protected $classes = [];
/**
* @var string The global variable to write output to
*/
protected $variableName = 'wgAutoloadClasses';
/**
* @var array Map of FQCN to relative path(from self::$basepath)
*/
protected $overrides = [];
/**
* Directories that should be excluded
*
* @var string[]
*/
protected $excludePaths = [];
/**
* Configured PSR4 namespaces
*
* @var string[] namespace => path
*/
protected $psr4Namespaces = [];
/**
* @param string $basepath Root path of the project being scanned for classes
* @param array|string $flags
*
* local - If this flag is set $wgAutoloadLocalClasses will be build instead
* of $wgAutoloadClasses
*/
public function __construct( $basepath, $flags = [] ) {
if ( !is_array( $flags ) ) {
$flags = [ $flags ];
}
$this->basepath = self::normalizePathSeparator( realpath( $basepath ) );
$this->collector = new ClassCollector;
if ( in_array( 'local', $flags ) ) {
$this->variableName = 'wgAutoloadLocalClasses';
}
}
/**
* Directories that should be excluded
*
* @since 1.31
* @param string[] $paths
*/
public function setExcludePaths( array $paths ) {
foreach ( $paths as $path ) {
$this->excludePaths[] = self::normalizePathSeparator( $path );
}
}
/**
* Unlike self::setExcludePaths(), this will only skip outputting the
* autoloader entry when the namespace matches the path.
*
* @since 1.32
* @deprecated since 1.40 - PSR-4 classes are now included in the generated classmap
* @param string[] $namespaces Associative array mapping namespace to path
*/
public function setPsr4Namespaces( array $namespaces ) {
foreach ( $namespaces as $ns => $path ) {
$ns = rtrim( $ns, '\\' ) . '\\';
$this->psr4Namespaces[$ns] = rtrim( self::normalizePathSeparator( $path ), '/' );
}
}
/**
* Whether the file should be excluded
*
* @param string $path File path
* @return bool
*/
private function shouldExclude( $path ) {
foreach ( $this->excludePaths as $dir ) {
if ( str_starts_with( $path, $dir ) ) {
return true;
}
}
return false;
}
/**
* Force a class to be autoloaded from a specific path, regardless of where
* or if it was detected.
*
* @param string $fqcn FQCN to force the location of
* @param string $inputPath Full path to the file containing the class
* @throws InvalidArgumentException
*/
public function forceClassPath( $fqcn, $inputPath ) {
$path = self::normalizePathSeparator( realpath( $inputPath ) );
if ( !$path ) {
throw new InvalidArgumentException( "Invalid path: $inputPath" );
}
if ( !str_starts_with( $path, $this->basepath ) ) {
throw new InvalidArgumentException( "Path is not within basepath: $inputPath" );
}
$shortpath = substr( $path, strlen( $this->basepath ) );
$this->overrides[$fqcn] = $shortpath;
}
/**
* @param string $inputPath Path to a php file to find classes within
* @throws InvalidArgumentException
*/
public function readFile( $inputPath ) {
// NOTE: do NOT expand $inputPath using realpath(). It is perfectly
// reasonable for LocalSettings.php and similar files to be symlinks
// to files that are outside of $this->basepath.
$inputPath = self::normalizePathSeparator( $inputPath );
$len = strlen( $this->basepath );
if ( !str_starts_with( $inputPath, $this->basepath ) ) {
throw new InvalidArgumentException( "Path is not within basepath: $inputPath" );
}
if ( $this->shouldExclude( $inputPath ) ) {
return;
}
$fileContents = file_get_contents( $inputPath );
// Skip files that declare themselves excluded
if ( preg_match( '!^// *NO_AUTOLOAD!m', $fileContents ) ) {
return;
}
// Skip files that use CommandLineInc since these execute file-scope
// code when included
if ( preg_match(
'/(require|require_once)[ (].*(CommandLineInc.php|commandLine.inc)/',
$fileContents )
) {
return;
}
$result = $this->collector->getClasses( $fileContents );
if ( $result ) {
$shortpath = substr( $inputPath, $len );
$this->classes[$shortpath] = $result;
}
}
/**
* @param string $dir Path to a directory to recursively search for php files
*/
public function readDir( $dir ) {
$it = new RecursiveDirectoryIterator(
self::normalizePathSeparator( realpath( $dir ) ) );
$it = new RecursiveIteratorIterator( $it );
foreach ( $it as $path => $file ) {
if ( pathinfo( $path, PATHINFO_EXTENSION ) === 'php' ) {
$this->readFile( $path );
}
}
}
/**
* Updates the AutoloadClasses field at the given
* filename.
*
* @param string $filename Filename of JSON
* extension/skin registration file
* @return string Updated Json of the file given as the $filename parameter
*/
protected function generateJsonAutoload( $filename ) {
$key = 'AutoloadClasses';
$json = FormatJson::decode( file_get_contents( $filename ), true );
unset( $json[$key] );
// Inverting the key-value pairs so that they become of the
// format class-name : path when they get converted into json.
foreach ( $this->classes as $path => $contained ) {
foreach ( $contained as $fqcn ) {
// Using substr to remove the leading '/'
$json[$key][$fqcn] = substr( $path, 1 );
}
}
foreach ( $this->overrides as $path => $fqcn ) {
// Using substr to remove the leading '/'
$json[$key][$fqcn] = substr( $path, 1 );
}
// Sorting the list of autoload classes.
ksort( $json[$key] );
// Return the whole JSON file
return FormatJson::encode( $json, "\t", FormatJson::ALL_OK ) . "\n";
}
/**
* Generates a PHP file setting up autoload information.
*
* @param string $commandName Command name to include in comment
* @param string $filename of PHP file to put autoload information in.
* @return string
*/
protected function generatePHPAutoload( $commandName, $filename ) {
// No existing JSON file found; update/generate PHP file
$content = [];
// We need to generate a line each rather than exporting the
// full array so __DIR__ can be prepended to all the paths
$format = "%s => __DIR__ . %s,";
foreach ( $this->classes as $path => $contained ) {
$exportedPath = var_export( $path, true );
foreach ( $contained as $fqcn ) {
$content[$fqcn] = sprintf(
$format,
var_export( $fqcn, true ),
$exportedPath
);
}
}
foreach ( $this->overrides as $fqcn => $path ) {
$content[$fqcn] = sprintf(
$format,
var_export( $fqcn, true ),
var_export( $path, true )
);
}
// sort for stable output
ksort( $content );
// extensions using this generator are appending to the existing
// autoload.
if ( $this->variableName === 'wgAutoloadClasses' ) {
$op = '+=';
} else {
$op = '=';
}
$output = implode( "\n\t", $content );
return <<<EOD
<?php
// This file is generated by $commandName, do not adjust manually
// phpcs:disable Generic.Files.LineLength
global \${$this->variableName};
\${$this->variableName} {$op} [
{$output}
];
EOD;
}
/**
* Returns all known classes as a string, which can be used to put into a target
* file (e.g. extension.json, skin.json or autoload.php)
*
* @param string $commandName Value used in file comment to direct
* developers towards the appropriate way to update the autoload.
* @return string
*/
public function getAutoload( $commandName = 'AutoloadGenerator' ) {
// We need to check whether an extension.json or skin.json exists or not, and
// incase it doesn't, update the autoload.php file.
$fileinfo = $this->getTargetFileinfo();
if ( $fileinfo['type'] === self::FILETYPE_JSON ) {
return $this->generateJsonAutoload( $fileinfo['filename'] );
}
return $this->generatePHPAutoload( $commandName, $fileinfo['filename'] );
}
/**
* Returns the filename of the extension.json of skin.json, if there's any, or
* otherwise the path to the autoload.php file in an array as the "filename"
* key and with the type (AutoloadGenerator::FILETYPE_JSON or AutoloadGenerator::FILETYPE_PHP)
* of the file as the "type" key.
*
* @return array
*/
public function getTargetFileinfo() {
if ( file_exists( $this->basepath . '/extension.json' ) ) {
return [
'filename' => $this->basepath . '/extension.json',
'type' => self::FILETYPE_JSON
];
}
if ( file_exists( $this->basepath . '/skin.json' ) ) {
return [
'filename' => $this->basepath . '/skin.json',
'type' => self::FILETYPE_JSON
];
}
return [
'filename' => $this->basepath . '/autoload.php',
'type' => self::FILETYPE_PHP
];
}
/**
* Ensure that Unix-style path separators ("/") are used in the path.
*
* @param string $path
* @return string
*/
protected static function normalizePathSeparator( $path ) {
return str_replace( '\\', '/', $path );
}
/**
* Initialize the source files and directories which are used for the MediaWiki default
* autoloader in {mw-base-dir}/autoload.php including:
* * includes/
* * languages/
* * maintenance/
* * mw-config/
* * any `*.php` file in the base directory
*/
public function initMediaWikiDefault() {
foreach ( [ 'includes', 'languages', 'maintenance', 'mw-config' ] as $dir ) {
$this->readDir( $this->basepath . '/' . $dir );
}
foreach ( glob( $this->basepath . '/*.php' ) as $file ) {
$this->readFile( $file );
}
}
}