alter / automatize the install process

/**
 * Implementation of hook_install_tasks_alter().
 */
function mysnippet_install_tasks_alter(&$tasks, $install_state) {
  // Database step.
  $tasks['install_settings_form'] = array('function' => 'my_install_settings_form');
  // Site configuration
  $tasks['install_configure_form'] = array('function' => 'my_install_configure_form');
  // Install is complete
  $tasks['install_finished'] = array('function' => 'my_install_finished');
}
 
/**
 * Alter database form settings
 */
function my_install_settings_form(&$install_state) {
  $form_state['storage']['database'] = array(
    'database' => 'mysnippet',
    'username' => 'myusername',
    'password' => 'mypasswd',
    'host' => 'localhost',
    'port' => '',
    'driver' => 'mysql',
    'prefix' => ''
);
  // call the initial submit
  install_settings_form_submit("", $form_state);
}
 
/**
 * Alter site configuration settings
 */
function my_install_configure_form(&$install_state) {
  $form_state['values'] = array(
    'site_name' => $d['name'],
    'site_mail' => 'no-reply@'.$d['name'].'.cec',
    // uid 1
    'account' => array (
      'name' => 'adminRTD',
      'mail' => 'admin@'.$d['name'].'.cec',
      'pass' => '07adminRTD73' //$d['default_admin_pass'],
    ),
    'site_default_country' => 'BE',
    'date_default_timezone' => 'Europe/Brussels',
    'clean_url' => 1,
    'update_status_module' => array (
      1 => 0,
       2 => 0
    )
  );
install_configure_form_submit("", $form_state);    
}
 
/**
 * Additional tasks when install is finished
 */
function my_install_finished(&$install_state) {
  variable_set('install_profile', drupal_get_profile());
  drupal_flush_all_caches();
  db_update('system')
    ->fields(array('weight' => 1000))
    ->condition('type', 'module')
    ->condition('name', drupal_get_profile())
    ->execute();
  drupal_get_schema(NULL, TRUE);
  drupal_cron_run();
}