Drupal mode is an advanced minor mode for developing in Drupal.
The approach taken is somewhat different from other attempts at creating a Drupal mode.
This mode is a minor mode and can be applied to all files in a Drupal project no matter what major mode they use - whether it be php-mode or something else.
Besides giving access to general functionality in all modes (i.e. clearing cache through Drush) it will also adapt it self to the major mode to enable functionality only for that particular major mode (i.e. adhering to Drupals PHP coding standards only in php-mode).
Drupal mode will not try to enforce specific ways of working with Emacs on to you. Emacs can be extended in a million different ways and you should use the parts and extensions that fit you and your working habits.
If Drupal mode recognizes you are using an extension that it knows about it will adapt the extension to be useful in Drupal mode and with Drupal. I.e. it will recognize if you have loaded etags support and setup your buffers to use the TAGS file in your DRUPAL_ROOT folder.
Drupal mode won't embed other libraries but will suggest some (see below) and depend on a few through the packaging system (i.e. php-mode).
The easiest way to install Drupal mode is probably to install it via the ELPA archive MELPA Stable (if you want bleeding edge use regular MELPA).
Drupal mode will make you write code that adheres to Drupals coding standards.
It does this by:
In php-mode code will be indented according to Drupals coding standards. If not it is considered a bug!
If your files are not written with Unix style line endings Drupal mode will ask your to convert them to Unix style line endings on saving buffers.
This behavior can be customized be the variable
drupal-convert-line-ending.
The default is to ask if you want the file to be converted. By asking you we hopefully won't trick you into making a commit in your version control system consisting of a bunch of functionality changes with every line also changed by a new line ending. If you have ever read 1000 of commits/diffs you will appreciate this.
In Drupal mode buffers we will enable Emacs'
delete-trailing-whitespace.
This behavior can be customized be the variable
drupal-delete-trailing-whitespace.
You can search Drupal documentation for the symbol at point by issuing
C-c C-v C-d or M-x drupal-search-documentation or from the Drupal
menu entry.
Files that are part of a Drupal project will try to identify the used version of Drupal core and look up the documentation for the corresponding version at https://api.drupal.org.
If the symbol at point is believed to be a Drush command the documentation will be looked up at https://api.drush.org instead. If Drush is installed it will identify the version of Drush and look up the documentation for the installed version of Drush.
You can change where to search for documentation by customizing
drupal-search-url (besides api.drupal.org it also has a predefined
setting for api.drupalcontrib.org) and drupal-drush-search-url.
If Drush is installed you can issue a drush cc all from within Emacs
by issuing C-c C-v C-c or M-x drupal-drush-cache-clear or from the
Drupal menu entry.
If the buffer you visit is believed to be a Drush command (we think it is if its file name or path contains "drush") we will also enter a Drush minor mode.
There is currently no functionality connected to drupal-drush-mode.
If you have generated a TAGS file in your DRUPAL_ROOT folder Drupal
mode will setup all buffers running drupal-mode to set
tags-file-name to point to that TAGS file.
Etags is a built-in part of Emacs.
If you load GNU Globals / gtags
support in Emacs then Drupal mode will set gtags-rootdir to your
DRUPAL_ROOT.
If Drush utilities for Emacs users is installed Drupal mode will update existing tag files in your DRUPAL_ROOT after saving a buffer.
If ispell.el is loaded in Emacs then Drupal mode will set the language
of your Drupal mode buffers to american as stated in Drupals coding
standards.
ispell.el is a built-in part of Emacs. An external program must be installed to run the actual spell checking, i.e. ispell, aspell, or hunspell.
If support for flymake-phpcs.el is loaded in Emacs and you have installed Drupal Code Sniffer rules then Drupal mode will enable flymake-phpcs under php-mode.
For this to work you need:
There are quite a few attempts at writing a Drupal mode out in the wild:
All of them more or less based on Configuring Emacs.
Drupal mode is actively developed at GitHub. Feature requests, ideas, bug reports, and pull request are more than welcome!