Git.php

<?php

namespace Drupal\Composer\Plugin\Scaffold;

use Composer\IO\IOInterface;
use Composer\Util\ProcessExecutor;

/**
 * Provide some Git utility operations.
 *
 * @internal
 */
class Git {
    
    /**
     * This class provides only static methods.
     */
    private function __construct() {
    }
    
    /**
     * Determines whether the specified scaffold file is already ignored.
     *
     * @param \Composer\IO\IOInterface $io
     *   The Composer IO interface.
     * @param string $path
     *   Path to scaffold file to check.
     * @param string $dir
     *   Base directory for git process.
     *
     * @return bool
     *   Whether the specified file is already ignored or not (TRUE if ignored).
     */
    public static function checkIgnore(IOInterface $io, $path, $dir = NULL) {
        $process = new ProcessExecutor($io);
        $output = '';
        $exitCode = $process->execute('git check-ignore ' . $process->escape($path), $output, $dir);
        return $exitCode == 0;
    }
    
    /**
     * Determines whether the specified scaffold file is tracked by git.
     *
     * @param \Composer\IO\IOInterface $io
     *   The Composer IO interface.
     * @param string $path
     *   Path to scaffold file to check.
     * @param string $dir
     *   Base directory for git process.
     *
     * @return bool
     *   Whether the specified file is already tracked or not (TRUE if tracked).
     */
    public static function checkTracked(IOInterface $io, $path, $dir = NULL) {
        $process = new ProcessExecutor($io);
        $output = '';
        $exitCode = $process->execute('git ls-files --error-unmatch ' . $process->escape($path), $output, $dir);
        return $exitCode == 0;
    }
    
    /**
     * Checks to see if the project root dir is in a git repository.
     *
     * @param \Composer\IO\IOInterface $io
     *   The Composer IO interface.
     * @param string $dir
     *   Base directory for git process.
     *
     * @return bool
     *   True if this is a repository.
     */
    public static function isRepository(IOInterface $io, $dir = NULL) {
        $process = new ProcessExecutor($io);
        $output = '';
        $exitCode = $process->execute('git rev-parse --show-toplevel', $output, $dir);
        return $exitCode == 0;
    }

}