function LibraryInstaller::isInstalled

@inheritDoc

Overrides InstallerInterface::isInstalled

File

vendor/composer/composer/src/Composer/Installer/LibraryInstaller.php, line 79

Class

LibraryInstaller

Package installation manager.

Namespace

Composer\Installer

Code

public function isInstalled(InstalledRepositoryInterface $repo, PackageInterface $package) {
    if (!$repo->hasPackage($package)) {
        return false;
    }
    $installPath = $this->getInstallPath($package);
    if (Filesystem::isReadable($installPath)) {
        return true;
    }
    if (Platform::isWindows() && $this->filesystem
        ->isJunction($installPath)) {
        return true;
    }
    if (is_link($installPath)) {
        if (realpath($installPath) === false) {
            return false;
        }
        return true;
    }
    return false;
}