z3c.recipe.tag 0.7

Generate ctags from eggs for development

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What's new in z3c.recipe.tag 0.7:

  • Support and require zc.buildout 2.0.
  • Add supported Python version (3.6, 2.7, 3.2, 3.3) classifiers to setup.py
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ZPL (Zope Public License) 
Paul Carduner
ROOT \ Internet \ HTTP (WWW)
z3c.recipe.tag is a Python recipe that generates a TAGS database file that can be used with a number of different editors to quickly lookup class and function definitions in your package's source files and egg dependencies.


Before running a tags enabled buildout, you must install the appropriate command line tag generation tools: exuberant-ctags and id-utils. In Ubuntu, you can install these with apt-get:

 sudo apt-get install exuberant-ctags id-utils

On a Mac, download and install port from http://www.macports.org/ and then install ctags and idutils in this way:

 sudo port install ctags idutils

How to use this recipe

With Buildout

Suppose you have an egg called MyApplication. To use this recipe with buildout, you would add the following to the buildout.cfg file:

recipe = z3c.recipe.tag:tags
eggs = MyApplication

This produces a script file in the bin/ directory which you can then run like this:


By default, this script produces three files in the directory from which you ran the script:

- a ctags file called TAGS for use by emacs,
- a ctags file called tags for use by vi, and
- an idutils file called ID for use by either.

You can then use these file in your editor of choice.

Optionally, you can select which files to build. The following is the output of ./bin/tags --help:

usage: build_tags [options]

 -h, --help show this help message and exit
 -l LANGUAGES, --languages=LANGUAGES
 ctags comma-separated list of languages. defaults to
 -e, --ctags-emacs flag to build emacs ctags ``TAGS`` file
 -v, --ctags-vi flag to build vi ctags ``tags`` file
 -b, --ctags-bbedit flag to build bbedit ctags ``tags`` file
 -i, --idutils flag to build idutils ``ID`` file

With Paver

If you are using Paver and already have z3c.recipe.tag installed, then all you have to do is add this line to your pavement.py file:

import z3c.recipe.tag

And then run the z3c.recipe.tag.tags task from the command line:

 paver z3c.recipe.tag.tags

Additional Resources

For additional information on using tags tables with different editors see the following websites:

- Emacs: http://www.gnu.org/software/emacs/manual/html_node/emacs/Tags.html
- to jump to the location of a tag, type M-x find-tag and the name of the tag. Or use M-. to jump to the tag matching the token the cursor is currently on. The first time you do this, you will be prompted for the location of the TAGS file.
- VIM: http://vimdoc.sourceforge.net/htmldoc/tagsrch.html
- BBEdit: http://pine.barebones.com/manual/BBEdit_9_User_Manual.pdf Chapter 14, page 324

For more information on ctags, visit http://ctags.sourceforge.net/

Last updated on September 9th, 2012


#ctags generator #egg dependencies #ctags #generator #eggs #dependencies

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