820 lines
26 KiB
PHP
820 lines
26 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Filesystem;
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use Symfony\Component\Filesystem\Exception\InvalidArgumentException;
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use Symfony\Component\Filesystem\Exception\RuntimeException;
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/**
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* Contains utility methods for handling path strings.
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*
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* The methods in this class are able to deal with both UNIX and Windows paths
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* with both forward and backward slashes. All methods return normalized parts
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* containing only forward slashes and no excess "." and ".." segments.
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*
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* @author Bernhard Schussek <bschussek@gmail.com>
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* @author Thomas Schulz <mail@king2500.net>
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* @author Théo Fidry <theo.fidry@gmail.com>
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*/
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final class Path
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{
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/**
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* The number of buffer entries that triggers a cleanup operation.
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*/
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private const CLEANUP_THRESHOLD = 1250;
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/**
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* The buffer size after the cleanup operation.
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*/
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private const CLEANUP_SIZE = 1000;
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/**
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* Buffers input/output of {@link canonicalize()}.
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*
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* @var array<string, string>
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*/
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private static $buffer = [];
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/**
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* @var int
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*/
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private static $bufferSize = 0;
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/**
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* Canonicalizes the given path.
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*
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* During normalization, all slashes are replaced by forward slashes ("/").
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* Furthermore, all "." and ".." segments are removed as far as possible.
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* ".." segments at the beginning of relative paths are not removed.
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*
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* ```php
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* echo Path::canonicalize("\symfony\puli\..\css\style.css");
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* // => /symfony/css/style.css
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*
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* echo Path::canonicalize("../css/./style.css");
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* // => ../css/style.css
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* ```
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*
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* This method is able to deal with both UNIX and Windows paths.
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*/
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public static function canonicalize(string $path): string
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{
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if ('' === $path) {
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return '';
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}
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// This method is called by many other methods in this class. Buffer
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// the canonicalized paths to make up for the severe performance
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// decrease.
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if (isset(self::$buffer[$path])) {
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return self::$buffer[$path];
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}
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// Replace "~" with user's home directory.
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if ('~' === $path[0]) {
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$path = self::getHomeDirectory().mb_substr($path, 1);
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}
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$path = self::normalize($path);
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[$root, $pathWithoutRoot] = self::split($path);
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$canonicalParts = self::findCanonicalParts($root, $pathWithoutRoot);
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// Add the root directory again
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self::$buffer[$path] = $canonicalPath = $root.implode('/', $canonicalParts);
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++self::$bufferSize;
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// Clean up regularly to prevent memory leaks
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if (self::$bufferSize > self::CLEANUP_THRESHOLD) {
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self::$buffer = \array_slice(self::$buffer, -self::CLEANUP_SIZE, null, true);
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self::$bufferSize = self::CLEANUP_SIZE;
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}
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return $canonicalPath;
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}
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/**
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* Normalizes the given path.
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*
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* During normalization, all slashes are replaced by forward slashes ("/").
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* Contrary to {@link canonicalize()}, this method does not remove invalid
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* or dot path segments. Consequently, it is much more efficient and should
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* be used whenever the given path is known to be a valid, absolute system
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* path.
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*
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* This method is able to deal with both UNIX and Windows paths.
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*/
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public static function normalize(string $path): string
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{
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return str_replace('\\', '/', $path);
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}
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/**
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* Returns the directory part of the path.
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*
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* This method is similar to PHP's dirname(), but handles various cases
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* where dirname() returns a weird result:
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*
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* - dirname() does not accept backslashes on UNIX
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* - dirname("C:/symfony") returns "C:", not "C:/"
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* - dirname("C:/") returns ".", not "C:/"
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* - dirname("C:") returns ".", not "C:/"
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* - dirname("symfony") returns ".", not ""
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* - dirname() does not canonicalize the result
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*
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* This method fixes these shortcomings and behaves like dirname()
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* otherwise.
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*
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* The result is a canonical path.
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*
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* @return string The canonical directory part. Returns the root directory
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* if the root directory is passed. Returns an empty string
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* if a relative path is passed that contains no slashes.
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* Returns an empty string if an empty string is passed.
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*/
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public static function getDirectory(string $path): string
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{
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if ('' === $path) {
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return '';
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}
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$path = self::canonicalize($path);
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// Maintain scheme
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if (false !== ($schemeSeparatorPosition = mb_strpos($path, '://'))) {
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$scheme = mb_substr($path, 0, $schemeSeparatorPosition + 3);
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$path = mb_substr($path, $schemeSeparatorPosition + 3);
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} else {
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$scheme = '';
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}
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if (false === ($dirSeparatorPosition = strrpos($path, '/'))) {
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return '';
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}
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// Directory equals root directory "/"
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if (0 === $dirSeparatorPosition) {
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return $scheme.'/';
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}
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// Directory equals Windows root "C:/"
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if (2 === $dirSeparatorPosition && ctype_alpha($path[0]) && ':' === $path[1]) {
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return $scheme.mb_substr($path, 0, 3);
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}
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return $scheme.mb_substr($path, 0, $dirSeparatorPosition);
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}
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/**
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* Returns canonical path of the user's home directory.
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*
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* Supported operating systems:
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*
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* - UNIX
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* - Windows8 and upper
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*
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* If your operating system or environment isn't supported, an exception is thrown.
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*
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* The result is a canonical path.
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*
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* @throws RuntimeException If your operating system or environment isn't supported
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*/
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public static function getHomeDirectory(): string
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{
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// For UNIX support
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if (getenv('HOME')) {
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return self::canonicalize(getenv('HOME'));
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}
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// For >= Windows8 support
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if (getenv('HOMEDRIVE') && getenv('HOMEPATH')) {
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return self::canonicalize(getenv('HOMEDRIVE').getenv('HOMEPATH'));
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}
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throw new RuntimeException("Cannot find the home directory path: Your environment or operating system isn't supported.");
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}
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/**
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* Returns the root directory of a path.
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*
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* The result is a canonical path.
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*
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* @return string The canonical root directory. Returns an empty string if
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* the given path is relative or empty.
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*/
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public static function getRoot(string $path): string
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{
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if ('' === $path) {
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return '';
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}
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// Maintain scheme
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if (false !== ($schemeSeparatorPosition = strpos($path, '://'))) {
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$scheme = substr($path, 0, $schemeSeparatorPosition + 3);
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$path = substr($path, $schemeSeparatorPosition + 3);
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} else {
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$scheme = '';
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}
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$firstCharacter = $path[0];
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// UNIX root "/" or "\" (Windows style)
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if ('/' === $firstCharacter || '\\' === $firstCharacter) {
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return $scheme.'/';
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}
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$length = mb_strlen($path);
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// Windows root
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if ($length > 1 && ':' === $path[1] && ctype_alpha($firstCharacter)) {
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// Special case: "C:"
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if (2 === $length) {
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return $scheme.$path.'/';
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}
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// Normal case: "C:/ or "C:\"
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if ('/' === $path[2] || '\\' === $path[2]) {
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return $scheme.$firstCharacter.$path[1].'/';
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}
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}
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return '';
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}
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/**
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* Returns the file name without the extension from a file path.
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*
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* @param string|null $extension if specified, only that extension is cut
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* off (may contain leading dot)
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*/
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public static function getFilenameWithoutExtension(string $path, string $extension = null): string
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{
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if ('' === $path) {
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return '';
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}
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if (null !== $extension) {
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// remove extension and trailing dot
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return rtrim(basename($path, $extension), '.');
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}
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return pathinfo($path, \PATHINFO_FILENAME);
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}
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/**
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* Returns the extension from a file path (without leading dot).
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*
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* @param bool $forceLowerCase forces the extension to be lower-case
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*/
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public static function getExtension(string $path, bool $forceLowerCase = false): string
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{
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if ('' === $path) {
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return '';
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}
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$extension = pathinfo($path, \PATHINFO_EXTENSION);
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if ($forceLowerCase) {
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$extension = self::toLower($extension);
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}
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return $extension;
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}
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/**
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* Returns whether the path has an (or the specified) extension.
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*
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* @param string $path the path string
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* @param string|string[]|null $extensions if null or not provided, checks if
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* an extension exists, otherwise
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* checks for the specified extension
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* or array of extensions (with or
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* without leading dot)
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* @param bool $ignoreCase whether to ignore case-sensitivity
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*/
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public static function hasExtension(string $path, $extensions = null, bool $ignoreCase = false): bool
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{
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if ('' === $path) {
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return false;
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}
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$actualExtension = self::getExtension($path, $ignoreCase);
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// Only check if path has any extension
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if ([] === $extensions || null === $extensions) {
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return '' !== $actualExtension;
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}
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if (\is_string($extensions)) {
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$extensions = [$extensions];
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}
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foreach ($extensions as $key => $extension) {
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if ($ignoreCase) {
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$extension = self::toLower($extension);
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}
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// remove leading '.' in extensions array
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$extensions[$key] = ltrim($extension, '.');
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}
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return \in_array($actualExtension, $extensions, true);
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}
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/**
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* Changes the extension of a path string.
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*
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* @param string $path The path string with filename.ext to change.
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* @param string $extension new extension (with or without leading dot)
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*
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* @return string the path string with new file extension
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*/
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public static function changeExtension(string $path, string $extension): string
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{
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if ('' === $path) {
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return '';
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}
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$actualExtension = self::getExtension($path);
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$extension = ltrim($extension, '.');
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// No extension for paths
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if ('/' === mb_substr($path, -1)) {
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return $path;
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}
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// No actual extension in path
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if (empty($actualExtension)) {
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return $path.('.' === mb_substr($path, -1) ? '' : '.').$extension;
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}
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return mb_substr($path, 0, -mb_strlen($actualExtension)).$extension;
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}
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public static function isAbsolute(string $path): bool
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{
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if ('' === $path) {
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return false;
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}
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// Strip scheme
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if (false !== ($schemeSeparatorPosition = mb_strpos($path, '://'))) {
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$path = mb_substr($path, $schemeSeparatorPosition + 3);
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}
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$firstCharacter = $path[0];
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// UNIX root "/" or "\" (Windows style)
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if ('/' === $firstCharacter || '\\' === $firstCharacter) {
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return true;
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}
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// Windows root
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if (mb_strlen($path) > 1 && ctype_alpha($firstCharacter) && ':' === $path[1]) {
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// Special case: "C:"
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if (2 === mb_strlen($path)) {
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return true;
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}
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// Normal case: "C:/ or "C:\"
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if ('/' === $path[2] || '\\' === $path[2]) {
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return true;
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}
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}
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return false;
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}
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public static function isRelative(string $path): bool
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{
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return !self::isAbsolute($path);
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}
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/**
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* Turns a relative path into an absolute path in canonical form.
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*
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* Usually, the relative path is appended to the given base path. Dot
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* segments ("." and "..") are removed/collapsed and all slashes turned
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* into forward slashes.
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*
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* ```php
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* echo Path::makeAbsolute("../style.css", "/symfony/puli/css");
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* // => /symfony/puli/style.css
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* ```
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*
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* If an absolute path is passed, that path is returned unless its root
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* directory is different than the one of the base path. In that case, an
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* exception is thrown.
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*
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* ```php
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* Path::makeAbsolute("/style.css", "/symfony/puli/css");
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* // => /style.css
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*
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* Path::makeAbsolute("C:/style.css", "C:/symfony/puli/css");
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* // => C:/style.css
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*
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* Path::makeAbsolute("C:/style.css", "/symfony/puli/css");
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* // InvalidArgumentException
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* ```
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*
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* If the base path is not an absolute path, an exception is thrown.
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*
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* The result is a canonical path.
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*
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* @param string $basePath an absolute base path
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*
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* @throws InvalidArgumentException if the base path is not absolute or if
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* the given path is an absolute path with
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* a different root than the base path
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*/
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public static function makeAbsolute(string $path, string $basePath): string
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{
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if ('' === $basePath) {
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throw new InvalidArgumentException(sprintf('The base path must be a non-empty string. Got: "%s".', $basePath));
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}
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if (!self::isAbsolute($basePath)) {
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throw new InvalidArgumentException(sprintf('The base path "%s" is not an absolute path.', $basePath));
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}
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if (self::isAbsolute($path)) {
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return self::canonicalize($path);
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}
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if (false !== ($schemeSeparatorPosition = mb_strpos($basePath, '://'))) {
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$scheme = mb_substr($basePath, 0, $schemeSeparatorPosition + 3);
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$basePath = mb_substr($basePath, $schemeSeparatorPosition + 3);
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} else {
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$scheme = '';
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}
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return $scheme.self::canonicalize(rtrim($basePath, '/\\').'/'.$path);
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}
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/**
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* Turns a path into a relative path.
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*
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* The relative path is created relative to the given base path:
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*
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* ```php
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* echo Path::makeRelative("/symfony/style.css", "/symfony/puli");
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* // => ../style.css
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* ```
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*
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* If a relative path is passed and the base path is absolute, the relative
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* path is returned unchanged:
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*
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* ```php
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* Path::makeRelative("style.css", "/symfony/puli/css");
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* // => style.css
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* ```
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*
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* If both paths are relative, the relative path is created with the
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* assumption that both paths are relative to the same directory:
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*
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* ```php
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* Path::makeRelative("style.css", "symfony/puli/css");
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* // => ../../../style.css
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* ```
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*
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* If both paths are absolute, their root directory must be the same,
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* otherwise an exception is thrown:
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*
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* ```php
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* Path::makeRelative("C:/symfony/style.css", "/symfony/puli");
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* // InvalidArgumentException
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* ```
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*
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* If the passed path is absolute, but the base path is not, an exception
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* is thrown as well:
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*
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* ```php
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* Path::makeRelative("/symfony/style.css", "symfony/puli");
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* // InvalidArgumentException
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* ```
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*
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* If the base path is not an absolute path, an exception is thrown.
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*
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* The result is a canonical path.
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*
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* @throws InvalidArgumentException if the base path is not absolute or if
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* the given path has a different root
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* than the base path
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*/
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public static function makeRelative(string $path, string $basePath): string
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{
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$path = self::canonicalize($path);
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$basePath = self::canonicalize($basePath);
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[$root, $relativePath] = self::split($path);
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[$baseRoot, $relativeBasePath] = self::split($basePath);
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// If the base path is given as absolute path and the path is already
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// relative, consider it to be relative to the given absolute path
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// already
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if ('' === $root && '' !== $baseRoot) {
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// If base path is already in its root
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if ('' === $relativeBasePath) {
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$relativePath = ltrim($relativePath, './\\');
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}
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return $relativePath;
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}
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// If the passed path is absolute, but the base path is not, we
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// cannot generate a relative path
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if ('' !== $root && '' === $baseRoot) {
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throw new InvalidArgumentException(sprintf('The absolute path "%s" cannot be made relative to the relative path "%s". You should provide an absolute base path instead.', $path, $basePath));
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}
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// Fail if the roots of the two paths are different
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if ($baseRoot && $root !== $baseRoot) {
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throw new InvalidArgumentException(sprintf('The path "%s" cannot be made relative to "%s", because they have different roots ("%s" and "%s").', $path, $basePath, $root, $baseRoot));
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}
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if ('' === $relativeBasePath) {
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return $relativePath;
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}
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// Build a "../../" prefix with as many "../" parts as necessary
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$parts = explode('/', $relativePath);
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$baseParts = explode('/', $relativeBasePath);
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$dotDotPrefix = '';
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// Once we found a non-matching part in the prefix, we need to add
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// "../" parts for all remaining parts
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$match = true;
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foreach ($baseParts as $index => $basePart) {
|
|
if ($match && isset($parts[$index]) && $basePart === $parts[$index]) {
|
|
unset($parts[$index]);
|
|
|
|
continue;
|
|
}
|
|
|
|
$match = false;
|
|
$dotDotPrefix .= '../';
|
|
}
|
|
|
|
return rtrim($dotDotPrefix.implode('/', $parts), '/');
|
|
}
|
|
|
|
/**
|
|
* Returns whether the given path is on the local filesystem.
|
|
*/
|
|
public static function isLocal(string $path): bool
|
|
{
|
|
return '' !== $path && false === mb_strpos($path, '://');
|
|
}
|
|
|
|
/**
|
|
* Returns the longest common base path in canonical form of a set of paths or
|
|
* `null` if the paths are on different Windows partitions.
|
|
*
|
|
* Dot segments ("." and "..") are removed/collapsed and all slashes turned
|
|
* into forward slashes.
|
|
*
|
|
* ```php
|
|
* $basePath = Path::getLongestCommonBasePath(
|
|
* '/symfony/css/style.css',
|
|
* '/symfony/css/..'
|
|
* );
|
|
* // => /symfony
|
|
* ```
|
|
*
|
|
* The root is returned if no common base path can be found:
|
|
*
|
|
* ```php
|
|
* $basePath = Path::getLongestCommonBasePath(
|
|
* '/symfony/css/style.css',
|
|
* '/puli/css/..'
|
|
* );
|
|
* // => /
|
|
* ```
|
|
*
|
|
* If the paths are located on different Windows partitions, `null` is
|
|
* returned.
|
|
*
|
|
* ```php
|
|
* $basePath = Path::getLongestCommonBasePath(
|
|
* 'C:/symfony/css/style.css',
|
|
* 'D:/symfony/css/..'
|
|
* );
|
|
* // => null
|
|
* ```
|
|
*/
|
|
public static function getLongestCommonBasePath(string ...$paths): ?string
|
|
{
|
|
[$bpRoot, $basePath] = self::split(self::canonicalize(reset($paths)));
|
|
|
|
for (next($paths); null !== key($paths) && '' !== $basePath; next($paths)) {
|
|
[$root, $path] = self::split(self::canonicalize(current($paths)));
|
|
|
|
// If we deal with different roots (e.g. C:/ vs. D:/), it's time
|
|
// to quit
|
|
if ($root !== $bpRoot) {
|
|
return null;
|
|
}
|
|
|
|
// Make the base path shorter until it fits into path
|
|
while (true) {
|
|
if ('.' === $basePath) {
|
|
// No more base paths
|
|
$basePath = '';
|
|
|
|
// next path
|
|
continue 2;
|
|
}
|
|
|
|
// Prevent false positives for common prefixes
|
|
// see isBasePath()
|
|
if (0 === mb_strpos($path.'/', $basePath.'/')) {
|
|
// next path
|
|
continue 2;
|
|
}
|
|
|
|
$basePath = \dirname($basePath);
|
|
}
|
|
}
|
|
|
|
return $bpRoot.$basePath;
|
|
}
|
|
|
|
/**
|
|
* Joins two or more path strings into a canonical path.
|
|
*/
|
|
public static function join(string ...$paths): string
|
|
{
|
|
$finalPath = null;
|
|
$wasScheme = false;
|
|
|
|
foreach ($paths as $path) {
|
|
if ('' === $path) {
|
|
continue;
|
|
}
|
|
|
|
if (null === $finalPath) {
|
|
// For first part we keep slashes, like '/top', 'C:\' or 'phar://'
|
|
$finalPath = $path;
|
|
$wasScheme = (false !== mb_strpos($path, '://'));
|
|
continue;
|
|
}
|
|
|
|
// Only add slash if previous part didn't end with '/' or '\'
|
|
if (!\in_array(mb_substr($finalPath, -1), ['/', '\\'])) {
|
|
$finalPath .= '/';
|
|
}
|
|
|
|
// If first part included a scheme like 'phar://' we allow \current part to start with '/', otherwise trim
|
|
$finalPath .= $wasScheme ? $path : ltrim($path, '/');
|
|
$wasScheme = false;
|
|
}
|
|
|
|
if (null === $finalPath) {
|
|
return '';
|
|
}
|
|
|
|
return self::canonicalize($finalPath);
|
|
}
|
|
|
|
/**
|
|
* Returns whether a path is a base path of another path.
|
|
*
|
|
* Dot segments ("." and "..") are removed/collapsed and all slashes turned
|
|
* into forward slashes.
|
|
*
|
|
* ```php
|
|
* Path::isBasePath('/symfony', '/symfony/css');
|
|
* // => true
|
|
*
|
|
* Path::isBasePath('/symfony', '/symfony');
|
|
* // => true
|
|
*
|
|
* Path::isBasePath('/symfony', '/symfony/..');
|
|
* // => false
|
|
*
|
|
* Path::isBasePath('/symfony', '/puli');
|
|
* // => false
|
|
* ```
|
|
*/
|
|
public static function isBasePath(string $basePath, string $ofPath): bool
|
|
{
|
|
$basePath = self::canonicalize($basePath);
|
|
$ofPath = self::canonicalize($ofPath);
|
|
|
|
// Append slashes to prevent false positives when two paths have
|
|
// a common prefix, for example /base/foo and /base/foobar.
|
|
// Don't append a slash for the root "/", because then that root
|
|
// won't be discovered as common prefix ("//" is not a prefix of
|
|
// "/foobar/").
|
|
return 0 === mb_strpos($ofPath.'/', rtrim($basePath, '/').'/');
|
|
}
|
|
|
|
/**
|
|
* @return non-empty-string[]
|
|
*/
|
|
private static function findCanonicalParts(string $root, string $pathWithoutRoot): array
|
|
{
|
|
$parts = explode('/', $pathWithoutRoot);
|
|
|
|
$canonicalParts = [];
|
|
|
|
// Collapse "." and "..", if possible
|
|
foreach ($parts as $part) {
|
|
if ('.' === $part || '' === $part) {
|
|
continue;
|
|
}
|
|
|
|
// Collapse ".." with the previous part, if one exists
|
|
// Don't collapse ".." if the previous part is also ".."
|
|
if ('..' === $part && \count($canonicalParts) > 0 && '..' !== $canonicalParts[\count($canonicalParts) - 1]) {
|
|
array_pop($canonicalParts);
|
|
|
|
continue;
|
|
}
|
|
|
|
// Only add ".." prefixes for relative paths
|
|
if ('..' !== $part || '' === $root) {
|
|
$canonicalParts[] = $part;
|
|
}
|
|
}
|
|
|
|
return $canonicalParts;
|
|
}
|
|
|
|
/**
|
|
* Splits a canonical path into its root directory and the remainder.
|
|
*
|
|
* If the path has no root directory, an empty root directory will be
|
|
* returned.
|
|
*
|
|
* If the root directory is a Windows style partition, the resulting root
|
|
* will always contain a trailing slash.
|
|
*
|
|
* list ($root, $path) = Path::split("C:/symfony")
|
|
* // => ["C:/", "symfony"]
|
|
*
|
|
* list ($root, $path) = Path::split("C:")
|
|
* // => ["C:/", ""]
|
|
*
|
|
* @return array{string, string} an array with the root directory and the remaining relative path
|
|
*/
|
|
private static function split(string $path): array
|
|
{
|
|
if ('' === $path) {
|
|
return ['', ''];
|
|
}
|
|
|
|
// Remember scheme as part of the root, if any
|
|
if (false !== ($schemeSeparatorPosition = mb_strpos($path, '://'))) {
|
|
$root = mb_substr($path, 0, $schemeSeparatorPosition + 3);
|
|
$path = mb_substr($path, $schemeSeparatorPosition + 3);
|
|
} else {
|
|
$root = '';
|
|
}
|
|
|
|
$length = mb_strlen($path);
|
|
|
|
// Remove and remember root directory
|
|
if (0 === mb_strpos($path, '/')) {
|
|
$root .= '/';
|
|
$path = $length > 1 ? mb_substr($path, 1) : '';
|
|
} elseif ($length > 1 && ctype_alpha($path[0]) && ':' === $path[1]) {
|
|
if (2 === $length) {
|
|
// Windows special case: "C:"
|
|
$root .= $path.'/';
|
|
$path = '';
|
|
} elseif ('/' === $path[2]) {
|
|
// Windows normal case: "C:/"..
|
|
$root .= mb_substr($path, 0, 3);
|
|
$path = $length > 3 ? mb_substr($path, 3) : '';
|
|
}
|
|
}
|
|
|
|
return [$root, $path];
|
|
}
|
|
|
|
private static function toLower(string $string): string
|
|
{
|
|
if (false !== $encoding = mb_detect_encoding($string)) {
|
|
return mb_strtolower($string, $encoding);
|
|
}
|
|
|
|
return strtolower($string, $encoding);
|
|
}
|
|
|
|
private function __construct()
|
|
{
|
|
}
|
|
}
|