function PathDownloader::computeAllowedStrategies

@phpstan-return array{self::STRATEGY_*, non-empty-list<self::STRATEGY_*>}

Parameters

mixed[] $transportOptions:

2 calls to PathDownloader::computeAllowedStrategies()

PathDownloader::getInstallOperationAppendix in vendor/composer/composer/src/Composer/Downloader/PathDownloader.php

@inheritDoc

PathDownloader::install in vendor/composer/composer/src/Composer/Downloader/PathDownloader.php

@inheritDoc

File

vendor/composer/composer/src/Composer/Downloader/PathDownloader.php, line 275

Class

PathDownloader

Download a package from a local path.

Namespace

Composer\Downloader

Code

private function computeAllowedStrategies(array $transportOptions) : array {
    // When symlink transport option is null, both symlink and mirror are allowed
    $currentStrategy = self::STRATEGY_SYMLINK;
    $allowedStrategies = [
        self::STRATEGY_SYMLINK,
        self::STRATEGY_MIRROR,
    ];
    $mirrorPathRepos = Platform::getEnv('COMPOSER_MIRROR_PATH_REPOS');
    if ((bool) $mirrorPathRepos) {
        $currentStrategy = self::STRATEGY_MIRROR;
    }
    $symlinkOption = $transportOptions['symlink'] ?? null;
    if (true === $symlinkOption) {
        $currentStrategy = self::STRATEGY_SYMLINK;
        $allowedStrategies = [
            self::STRATEGY_SYMLINK,
        ];
    }
    elseif (false === $symlinkOption) {
        $currentStrategy = self::STRATEGY_MIRROR;
        $allowedStrategies = [
            self::STRATEGY_MIRROR,
        ];
    }
    // Check we can use junctions safely if we are on Windows
    if (Platform::isWindows() && self::STRATEGY_SYMLINK === $currentStrategy && !$this->safeJunctions()) {
        if (!in_array(self::STRATEGY_MIRROR, $allowedStrategies, true)) {
            throw new \RuntimeException('You are on an old Windows / old PHP combo which does not allow Composer to use junctions/symlinks and this path repository has symlink:true in its options so copying is not allowed');
        }
        $currentStrategy = self::STRATEGY_MIRROR;
        $allowedStrategies = [
            self::STRATEGY_MIRROR,
        ];
    }
    // Check we can use symlink() otherwise
    if (!Platform::isWindows() && self::STRATEGY_SYMLINK === $currentStrategy && !function_exists('symlink')) {
        if (!in_array(self::STRATEGY_MIRROR, $allowedStrategies, true)) {
            throw new \RuntimeException('Your PHP has the symlink() function disabled which does not allow Composer to use symlinks and this path repository has symlink:true in its options so copying is not allowed');
        }
        $currentStrategy = self::STRATEGY_MIRROR;
        $allowedStrategies = [
            self::STRATEGY_MIRROR,
        ];
    }
    return [
        $currentStrategy,
        $allowedStrategies,
    ];
}