#!/usr/bin/php
<?php
/**
 * Drupal shell execution script
 * 
 * @param URI   A URI to execute, including HTTP protocol prefix.
 * @param path  Drupal's absolute root directory in local file system (optional).
 * 
 * $Id:$
 */
$script = array_shift($_SERVER['argv']);

if (in_array('--help', $_SERVER['argv'])) {
  echo <<<EOF

Execute a Drupal page from the shell.

Usage:    {$script} [OPTIONS] <URI>
Example:  {$script} http://mysite.org/node

All arguments are long options.

  --help      This page.

  --root      Set the working directory for the script to the specified path,
              which has to be the root directory of your Drupal installation,
              f.e. /home/www/foo/drupal (assuming Drupal running on Unix).
              Use surrounding quotation marks on Windows.
              Current directory is not required.

  --verbose   This option will display the options as they are set.
              However produces errors from setting the session.

  URI         The URI to execute, f.e. http://default/foo/bar for executing
              the path '/foo/bar' in your site 'default'.
              Prefix 'http://' is required. Domain must exist below /sites.
              Enter '/cron.php' for executing cron.php (i.e. http://default/cron.php).
\n
EOF;
  exit;
}

// define default settings
$cmd = 'index.php';
$_SERVER['HTTP_HOST'] = 'default';
$_SERVER['PHP_SELF'] = '/index.php';

// toggle verbose mode
if (in_array('--verbose', $_SERVER['argv'])) {
  $_verbose_mode = true;
} else {
  $_verbose_mode = false;
}

// parse invocation arguments
while ($param = array_shift($_SERVER['argv'])) {
  switch ($param) {
    case '--root':
      // change working directory
      $path = array_shift($_SERVER['argv']);
      if (is_dir($path)) {
        chdir($path);
        echo "cwd changed to: {$path}\n";
      }
      else {
        echo "\nERROR: {$path} not found.\n\n";
      }
      break;
      
    default:
      if (substr($param, 0, 2) == '--') {
        // ignore unknown options
      }
      else {
        // parse the URI
        // disregarding 'http://', it's only for usability
        preg_match('@^(?:http://)?([^/]+)(.+)@i', $param, $matches);
        
        // site name
        $_SERVER['HTTP_HOST'] = $matches[1];
        if ($_verbose_mode) {
          echo "Site set to: {$_SERVER['HTTP_HOST']}\n";
        }
        
        // script name
        if (strpos( $matches[2], '.php' )) {
          preg_match('@^(.+\.php)?@', $matches[2], $cmd);
          $cmd = $_SERVER['PHP_SELF'] = $cmd[0];
          $_custom_script = true;
          if ($_verbose_mode) {
            echo "Script name set to: {$cmd}\n";
          }
        }
        
        // path (clean urls)
        // parse only if it is not passed through GET or
        // if no script name has been detected
        if (!isset($_GET['q']) && !isset( $_custom_script )) {
          $_REQUEST['q'] = $_GET['q'] = $matches[2];
          if ($_verbose_mode) {
            echo "Path set to: {$_GET['q']}\n";
          }
        }
      }
  }
}

include $cmd;
exit();