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<?php declare(strict_types=1);
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/*
* This file was initially based on a version from the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*/
namespace Composer\ClassMapGenerator;
use Composer\Pcre\Preg;
use Symfony\Component\Finder\Finder;
use Composer\IO\IOInterface;
/**
* ClassMapGenerator
*
* @author Gyula Sallai <salla016@gmail.com>
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class ClassMapGenerator
{
/**
* @var list<string>
*/
private $extensions;
/**
* @var FileList|null
*/
private $scannedFiles = null;
/**
* @var ClassMap
*/
private $classMap;
/**
* @param list<string> $extensions File extensions to scan for classes in the given paths
*/
public function __construct(array $extensions = ['php', 'inc'])
{
$this->extensions = $extensions;
$this->classMap = new ClassMap;
}
/**
* When calling scanPaths repeatedly with paths that may overlap, calling this will ensure that the same class is never scanned twice
*
* You can provide your own FileList instance or use the default one if you pass no argument
*
* @return $this
*/
public function avoidDuplicateScans(FileList $scannedFiles = null): self
{
$this->scannedFiles = $scannedFiles ?? new FileList;
return $this;
}
/**
* Iterate over all files in the given directory searching for classes
*
* @param string|\Traversable<\SplFileInfo>|array<\SplFileInfo> $path The path to search in or an array/traversable of SplFileInfo (e.g. symfony/finder instance)
* @return array<class-string, non-empty-string> A class map array
*
* @throws \RuntimeException When the path is neither an existing file nor directory
*/
public static function createMap($path): array
{
$generator = new self();
$generator->scanPaths($path);
return $generator->getClassMap()->getMap();
}
public function getClassMap(): ClassMap
{
return $this->classMap;
}
/**
* Iterate over all files in the given directory searching for classes
*
* @param string|\Traversable<\SplFileInfo>|array<\SplFileInfo> $path The path to search in or an array/traversable of SplFileInfo (e.g. symfony/finder instance)
* @param non-empty-string|null $excluded Regex that matches file paths to be excluded from the classmap
* @param 'classmap'|'psr-0'|'psr-4' $autoloadType Optional autoload standard to use mapping rules with the namespace instead of purely doing a classmap
* @param string|null $namespace Optional namespace prefix to filter by, only for psr-0/psr-4 autoloading
*
* @throws \RuntimeException When the path is neither an existing file nor directory
*/
public function scanPaths($path, string $excluded = null, string $autoloadType = 'classmap', ?string $namespace = null): void
{
if (!in_array($autoloadType, ['psr-0', 'psr-4', 'classmap'], true)) {
throw new \InvalidArgumentException('$autoloadType must be one of: "psr-0", "psr-4" or "classmap"');
}
if ('classmap' !== $autoloadType) {
if (!is_string($path)) {
throw new \InvalidArgumentException('$path must be a string when specifying a psr-0 or psr-4 autoload type');
}
if (!is_string($namespace)) {
throw new \InvalidArgumentException('$namespace must be given (even if it is an empty string if you do not want to filter) when specifying a psr-0 or psr-4 autoload type');
}
$basePath = $path;
}
if (is_string($path)) {
if (is_file($path)) {
$path = [new \SplFileInfo($path)];
} elseif (is_dir($path) || strpos($path, '*') !== false) {
$path = Finder::create()
->files()
->followLinks()
->name('/\.(?:'.implode('|', array_map('preg_quote', $this->extensions)).')$/')
->in($path);
} else {
throw new \RuntimeException(
'Could not scan for classes inside "'.$path.'" which does not appear to be a file nor a folder'
);
}
}
$cwd = realpath(self::getCwd());
foreach ($path as $file) {
$filePath = $file->getPathname();
if (!in_array(pathinfo($filePath, PATHINFO_EXTENSION), $this->extensions, true)) {
continue;
}
if (!self::isAbsolutePath($filePath)) {
$filePath = $cwd . '/' . $filePath;
$filePath = self::normalizePath($filePath);
} else {
$filePath = Preg::replace('{[\\\\/]{2,}}', '/', $filePath);
}
if ('' === $filePath) {
throw new \LogicException('Got an empty $filePath for '.$file->getPathname());
}
$realPath = realpath($filePath);
// fallback just in case but this really should not happen
if (false === $realPath) {
throw new \RuntimeException('realpath of '.$filePath.' failed to resolve, got false');
}
// if a list of scanned files is given, avoid scanning twice the same file to save cycles and avoid generating warnings
// in case a PSR-0/4 declaration follows another more specific one, or a classmap declaration, which covered this file already
if ($this->scannedFiles !== null && $this->scannedFiles->contains($realPath)) {
continue;
}
// check the realpath of the file against the excluded paths as the path might be a symlink and the excluded path is realpath'd so symlink are resolved
if (null !== $excluded && Preg::isMatch($excluded, strtr($realPath, '\\', '/'))) {
continue;
}
// check non-realpath of file for directories symlink in project dir
if (null !== $excluded && Preg::isMatch($excluded, strtr($filePath, '\\', '/'))) {
continue;
}
$classes = PhpFileParser::findClasses($filePath);
if ('classmap' !== $autoloadType && isset($namespace)) {
$classes = $this->filterByNamespace($classes, $filePath, $namespace, $autoloadType, $basePath);
// if no valid class was found in the file then we do not mark it as scanned as it might still be matched by another rule later
if (\count($classes) > 0 && $this->scannedFiles !== null) {
$this->scannedFiles->add($realPath);
}
} elseif ($this->scannedFiles !== null) {
// classmap autoload rules always collect all classes so for these we definitely do not want to scan again
$this->scannedFiles->add($realPath);
}
foreach ($classes as $class) {
if (!$this->classMap->hasClass($class)) {
$this->classMap->addClass($class, $filePath);
} elseif ($filePath !== $this->classMap->getClassPath($class) && !Preg::isMatch('{/(test|fixture|example|stub)s?/}i', strtr($this->classMap->getClassPath($class).' '.$filePath, '\\', '/'))) {
$this->classMap->addAmbiguousClass($class, $filePath);
}
}
}
}
/**
* Remove classes which could not have been loaded by namespace autoloaders
*
* @param array<int, class-string> $classes found classes in given file
* @param string $filePath current file
* @param string $baseNamespace prefix of given autoload mapping
* @param 'psr-0'|'psr-4' $namespaceType
* @param string $basePath root directory of given autoload mapping
* @return array<int, class-string> valid classes
*/
private function filterByNamespace(array $classes, string $filePath, string $baseNamespace, string $namespaceType, string $basePath): array
{
$validClasses = [];
$rejectedClasses = [];
$realSubPath = substr($filePath, strlen($basePath) + 1);
$dotPosition = strrpos($realSubPath, '.');
$realSubPath = substr($realSubPath, 0, $dotPosition === false ? PHP_INT_MAX : $dotPosition);
foreach ($classes as $class) {
// silently skip if ns doesn't have common root
if ('' !== $baseNamespace && 0 !== strpos($class, $baseNamespace)) {
continue;
}
// transform class name to file path and validate
if ('psr-0' === $namespaceType) {
$namespaceLength = strrpos($class, '\\');
if (false !== $namespaceLength) {
$namespace = substr($class, 0, $namespaceLength + 1);
$className = substr($class, $namespaceLength + 1);
$subPath = str_replace('\\', DIRECTORY_SEPARATOR, $namespace)
. str_replace('_', DIRECTORY_SEPARATOR, $className);
} else {
$subPath = str_replace('_', DIRECTORY_SEPARATOR, $class);
}
} elseif ('psr-4' === $namespaceType) {
$subNamespace = ('' !== $baseNamespace) ? substr($class, strlen($baseNamespace)) : $class;
$subPath = str_replace('\\', DIRECTORY_SEPARATOR, $subNamespace);
} else {
throw new \InvalidArgumentException('$namespaceType must be "psr-0" or "psr-4"');
}
if ($subPath === $realSubPath) {
$validClasses[] = $class;
} else {
$rejectedClasses[] = $class;
}
}
// warn only if no valid classes, else silently skip invalid
if (\count($validClasses) === 0) {
foreach ($rejectedClasses as $class) {
$this->classMap->addPsrViolation("Class $class located in ".Preg::replace('{^'.preg_quote(self::getCwd()).'}', '.', $filePath, 1)." does not comply with $namespaceType autoloading standard. Skipping.");
}
return [];
}
return $validClasses;
}
/**
* Checks if the given path is absolute
*
* @see Composer\Util\Filesystem::isAbsolutePath
*
* @param string $path
* @return bool
*/
private static function isAbsolutePath(string $path)
{
return strpos($path, '/') === 0 || substr($path, 1, 1) === ':' || strpos($path, '\\\\') === 0;
}
/**
* Normalize a path. This replaces backslashes with slashes, removes ending
* slash and collapses redundant separators and up-level references.
*
* @see Composer\Util\Filesystem::normalizePath
*
* @param string $path Path to the file or directory
* @return string
*/
private static function normalizePath(string $path)
{
$parts = [];
$path = strtr($path, '\\', '/');
$prefix = '';
$absolute = '';
// extract windows UNC paths e.g. \\foo\bar
if (strpos($path, '//') === 0 && \strlen($path) > 2) {
$absolute = '//';
$path = substr($path, 2);
}
// extract a prefix being a protocol://, protocol:, protocol://drive: or simply drive:
if (Preg::isMatchStrictGroups('{^( [0-9a-z]{2,}+: (?: // (?: [a-z]: )? )? | [a-z]: )}ix', $path, $match)) {
$prefix = $match[1];
$path = substr($path, \strlen($prefix));
}
if (strpos($path, '/') === 0) {
$absolute = '/';
$path = substr($path, 1);
}
$up = false;
foreach (explode('/', $path) as $chunk) {
if ('..' === $chunk && (\strlen($absolute) > 0 || $up)) {
array_pop($parts);
$up = !(\count($parts) === 0 || '..' === end($parts));
} elseif ('.' !== $chunk && '' !== $chunk) {
$parts[] = $chunk;
$up = '..' !== $chunk;
}
}
// ensure c: is normalized to C:
$prefix = Preg::replaceCallback('{(?:^|://)[a-z]:$}i', function (array $m) { return strtoupper((string) $m[0]); }, $prefix);
return $prefix.$absolute.implode('/', $parts);
}
/**
* @see Composer\Util\Platform::getCwd
*/
private static function getCwd(): string
{
$cwd = getcwd();
if (false === $cwd) {
throw new \RuntimeException('Could not determine the current working directory');
}
return $cwd;
}
}
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