blt

#!/usr/bin/env php
<?php

$repo_root = find_repo_root();
$autoload = require_once $repo_root . '/vendor/autoload.php';
if (!isset($autoload)) {
  print "Unable to find autoloader for BLT\n";
  exit(1);
}

$robo_namespaces = [
  'acsf',
  'ci',
  'custom',
  'drupal',
  'setup',
  'tests',
  'vm',
];
$robo_commands = [
  'doctor'
];

$params_string = implode(' ', array_slice($argv, 1));

// If command begins with string in $robo_namespaces, execute command via Robo.
if (!empty($argv[1])) {
  foreach ($robo_namespaces as $namespace) {
    if (strpos($argv[1], $namespace) === 0) {
      require_once __DIR__. '/blt-robo-run.php';
    }
  }
}
// If command is in $robo_commands, execute command via Robo.
if (!empty($argv[1]) && in_array($argv[1], $robo_commands)) {
  $command = $argv[1];
  require_once __DIR__. '/blt-robo-run.php';
}
// Otherwise, execute target via Phing.
else {
  chdir($repo_root);
  $phing = $repo_root . '/vendor/phing/phing/bin/phing';
  array_splice($argv, 1, 0, array('-logger', 'vendor.acquia.blt.phing.phingcludes.BltLogger'));
  array_splice($argv, 1, 0, array('-f', './vendor/acquia/blt/phing/build.xml'));

  // @see vendor/bin/phing
  ini_set('html_errors', 'off');
  putenv("PHING_HOME=" . realpath(dirname($phing) . '/../'));

  $phing_include = dirname($phing) . '/phing.php';
  require_once $phing_include;
}

/**
 * Finds the root directory for the repository.
 *
 * @return bool|string
 */
function find_repo_root() {
  $possible_repo_roots = [
    $_SERVER['PWD'],
    getcwd(),
    realpath(__DIR__ . '/../'),
    realpath(__DIR__ . '/../../../'),
  ];
  foreach ($possible_repo_roots as $possible_repo_root) {
    if ($repo_root = find_directory_containing_files($possible_repo_root, ['vendor/bin/blt', 'vendor/autoload.php'])) {
      return $repo_root;
    }
  }
}

/**
 * Traverses file system upwards in search of a given file.
 *
 * Begins searching for $file in $working_directory and climbs up directories
 * $max_height times, repeating search.
 *
 * @param string $working_directory
 * @param array $files
 * @param int $max_height
 *
 * @return bool|string
 *   FALSE if file was not found. Otherwise, the directory path containing the
 *   file.
 */
function find_directory_containing_files($working_directory, $files, $max_height = 10) {
  // Find the root directory of the git repository containing BLT.
  // We traverse the file tree upwards $max_height times until we find
  // vendor/bin/blt.
  $file_path = $working_directory;
  for ($i = 0; $i <= $max_height; $i++) {
    if (files_exist($file_path, $files)) {
      return $file_path;
    }
    else {
      $file_path = realpath($file_path . '/..');
    }
  }

  return FALSE;
}

/**
 * Determines if an array of files exist in a particular directory.
 *
 * @param string $dir
 * @param array $files
 *
 * @return bool
 */
function files_exist($dir, $files) {
  foreach ($files as $file) {
    if (!file_exists($dir . '/' . $file)) {
      return FALSE;
    }
  }
  return TRUE;
}