Coder is a Drupal module to check for coding standard issues in custom modules and themes. It can check any files for coding standard issues according to Drupal specifications. This method uses latest composer and drush to install latest coder. Feel free to skip the following to corresponding parts you need.

• Install composer

  Check if composer is installed,

  which composer

  If this is empty, proceed with below command. Else skip.

  curl -sS https://getcomposer.org/installer | php
  sudo mv composer.phar /usr/local/bin/composer
  which composer

• Install coder

  composer global require drupal/coder
  sudo ln -s ~/.composer/vendor/bin/phpcs /usr/local/bin
  sudo ln -s ~/.composer/vendor/bin/phpcbf /usr/local/bin
  phpcs --config-set installed_paths ~/.composer/vendor/drupal/coder/coder_sniffer
  

• Install the latest version of Drush

  If you have installed drush with package manager, remove it, as it would be probably old version.

  sudo apt-get remove drush

  Use the following to install latest drush.
  Add the line export PATH="$HOME/.composer/vendor/bin:$PATH" to end of ~/.bashrc

  source ~/.bashrc
  composer global require drush/drush:dev-master
  drush --version

  If it shows drush version, drush is installed correctly.

• Download coder module

  drush pm-download coder --destination=$HOME/.drush
  drush cache-clear drush

• Install PHP Code Sniffer

  composer global require squizlabs/PHP_CodeSniffer:\>=2
  phpcs --version

Now you can check standards like this.

phpcs --standard=Drupal /path/to/example.module

Make Alias

Its better to use an alias for drupal itself, like drupalcs. Follow the steps below for it.

echo $SHELL
vi ~/.bashrc

Append the following lines to it.

alias drupalcs="phpcs --standard=Drupal --extensions='php,module,inc,install,test,profile,theme,js,css,info,txt'"
alias drupalcs="phpcs --standard=DrupalPractice --extensions='php,module,inc,install,test,profile,theme,js,css,info,txt'"

Restart the terminal or use

source ~/.bashrc

You can now use like this.

drupalcs /path/to/module

Or for a stricter compliance,

drupalcsp /path/to/module

Hope this helps. Happy Coding. Also, feel free to get in touch with us if any queries.