This is a DRUSH command that makes it easy for you to enable/disable modules, set permissions, and set variables depending on your current environment. Basically, this solves the problem of "I want devel enabled on DEV but not on PROD."

INSTALLATION

Install the environment.drush.inc file in your sites/all/drush folder
Add something like the following to your sites/all/drush/drushrc.php file

/*
// Add this to your drushrc file and modify as needed.
// The option key MUST be enviroments.
$options['environments'] = array(
  // #key = The enviroment name.
  'development' => array(
    // The list of modules to enabled (1) or disable (0).
    'modules' => array(
      'views_ui' => 1,
      'context_ui' => 1,
      'devel' => 1,
      'theme_developer' => 0,
    ),
    // The list of variables to configure.
    'settings' => array(
      'preprocess_css' => 0,
      'preprocess_js' => 0,
    ),
    // The list of roles to grant (1) and revoke (0) on a per role basis.
    'permissions' => array(
      'Administrator' => array (
        'administer features' => 1,
        'administer permissions' => 1,
      ),
      'anonymous user' => array (
        'administer features' => 0,
        'administer permissions' => 0,
      )
    ),
  ),
);
*/

NOTE: A good chunk of the code for this drush command was stole...er...borrowed from Eric Duran

Drush Environemnt

Issues