CTags and Vim

Thanks in part to
http://sachachua.com/blog/2008/07/eclipse-to-emacs-navigating-your-source-tree/

Set-up:

(If not already installed: sudo apt-get install exuberant-ctags)

ctags -R -f ctagstags --languages=php --langmap=php:.module.php.inc.engine.profile .

In .vimrc,

set tags=ctagstags;/

In .bashrc

# Alias for creating CTags file, to run from the base of your Drupal project
alias dtags='ctags -R -f ctagstags --languages=php --langmap=php:.module.php.inc.engine.profile .'

To find the definition of the function, you put your cursor on the function name and press ctrl+]

Or, when in vi, you can type the name:
:ta name_of_function

To go back to the file you were just in:
ctrl + o

When on the command line, you can open the file and jump to the function declaration in Vim with:

vi -t name_of_function

To rebuild your tag index, go to the root directory of your project and use the alias:

dtags

For other Bash and Git improvements
see /etc/bash_completion.d/git