Build a Drupal 7 site with custom module code, features, settings, drush aliases, and themes using the drupal-composer template and Robo!

dir_structure

Root
|-composer.json
|-composer.lock
|-src/
   |-custom/
   |-features/
   |-themes/
   |-drush/
   |-settings.php
|-readme.md
|-web/ (the drupal root which is created after composer install and further populated with custom code after robo build)

RoboFile.php

<?php
/**
 * This is project's console commands configuration for Robo task runner.
 *
 * @see http://robo.li/
 */
class RoboFile extends \Robo\Tasks
{
  /**
   * Sync custom source files with web directory.
   */
  public function build() {
    $this->taskMirrorDir([
      'src/features' => 'web/sites/all/modules/features',
      'src/custom' => 'web/sites/all/modules/custom',
      'src/themes' => 'web/sites/all/themes',
      'src/drush' => 'web/sites/all/drush'
    ])->run();
    $this->taskFilesystemStack()
         ->copy('src/settings.php', 'web/sites/default/settings.php')
         ->run();
  }
  /**
   * Ensures that all site code has the proper file permissions
   * @param string $user
   * @param string $group
   * @throws \Robo\Exception\TaskException
   */
  public function setPerms($user, $group) {
    if (!$user) {
      $user = $this->ask('What is your system username?');
    }
    if (!$group) {
      $group = $this->ask('What is your system group name?');
    }
    $this->taskExecStack()
         ->dir('./web')
         ->stopOnFail()
         ->exec("chown -R $user:$group .")
         ->exec("find . -type d -exec chmod u=rwx,g=rx,o= '{}' \;")
         ->exec("find . -type f -exec chmod u=rw,g=r,o= '{}' \;")
         ->dir('./web/sites')
         ->exec("find . -type d -name files -exec chmod ug=rwx,o= '{}' \;")
         ->exec("for d in ./*/files; do    find \$d -type d -exec chmod ug=rwx,o= '{}' \;;    find \$d -type f -exec chmod ug=rw,o= '{}' \;; done")
         ->run();
  }
}