Graphviz for dynamic generation of diagrams


Graphviz logo

This is a plugin that allows the dynamic generation of diagrams by Graphviz programs. The text of a wiki page can contain the source text for Graphviz and the web browser will show the resulting image.

For examples, see below.

Bugs/Feature Requests

Existing bugs and feature requests for GraphvizPlugin are here.

If you have any issues, create a new ticket.

Be sure to mention which version of Trac and which version of the plugin you are using. If the version number ends with dev, then please also specify the changeset number corresponding to the version you are using.


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Or you can download the zipped source from here. Note that this contains everything regarding the Graphviz plugin including tagged releases and branches. The 0.10 directory contains the latest released version of the code for Trac 0.10 and the 0.11 directory contains the latest code for Trac 0.11.

  • download latest stable version (0.7.5) for Trac 0.11.
  • download latest version for Trac 0.10.

That version has some trouble with rsvg support for creating anti-aliased images. The upcoming version contains a few related fixes:

  • download latest unstable version for Trac 0.11 and later.
  • download latest unstable version for Trac 1.0

If you want to have anti-aliased images, it might be a better option anyway to get/build a recent version of graphviz tools, which support producing anti-aliased images directly, through pangocairo support.


You can check out GraphvizPlugin from here using Subversion, or browse the source with Trac.


  1. A prerequisite for installation are the programs from
  2. Install
  3. Restart your web server (this example command line for Apache on Ubuntu):
    [sudo] /etc/init.d/apache2 restart
  4. Enable the plugin:
    • by updating your trac.ini with this:
      graphviz.* = enabled
    • or accessing your Admin panel ( ..admin/general/plugins ).
  5. Configure your environment:
    • by modifying your trac.ini file.
    • by accessing your Admin panel case you have WebAdminPlugin enabled.


Add the following lines to a wiki page:

digraph G {Hello->World->Graphviz->Rules}

and that would produce an image as follows:

Sample outout from the graphviz plugin, produced with graphviz-2.20.3 with pangocairo support

Note that you can insert TracLinks like this:

  digraph G {
    rankdir = "LR"
    GraphvizPlugin [ URL=GraphvizPlugin ]
    Trac [ 
    GraphvizPlugin -> Trac

This produces an image like this, but with clickable nodes (note that nodes aren't actually clickable in this example):

second example, this time with colour and TracLinks, also produced with graphviz-2.20.3 on Linux

More examples at:

Recent Changes

15729 by rjollos on 2016-08-23 03:28:12 Tag version and bump trunk to

Fixes #12846.

15697 by rjollos on 2016-08-12 06:40:59 Fix error building egg

Fixes #12842.

15694 by rjollos on 2016-08-11 00:34:21 Delete tag_svn_revision from setup.cfg

The attribute isn't supported in setuptool >= 10.



Author: pkropf
Maintainer: Christian Boos
Contributors: cboos

Last modified 8 weeks ago Last modified on Aug 28, 2016, 12:33:34 PM

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