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Wiki macro for redmine. The macro render graph-image from wiki contents as dot.
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Redmine Wiki Graphviz-macro plugin

Redmine Wiki Graphviz-macro plugin will allow Redmine's wiki to render graph image.


  • Add wiki macro {{graphviz}} and {{graphviz_me}}

  • Write wiki page as dot format, and the macros make it graph image.

{{graphviz}} macro

  • This macro render graph image from other wiki page's content.

  • format={png|jpg|svg}

  • layout={dot|neato|fdp|twopi|circo}

  • inline={true|false}

    If svg format is specified, Its default output is inline SVG. If inline is false, img tag will be used.
  • target={_blank|any} (*1)

  • with_source : Display both image and its source(dot) (*1)

  • no_map : Disable clickable map. (*1)

  • wiki=page : Link image to specified wiki page. (*1)

  • link_to_image : Link image to itself. (*1)

  • align=value : Additional attr for IMG. (*1)

    e.g.) right, left
  • width=value : Additional attr for IMG.

    It is recommended to use no_map option together.
    e.g.) 100px, 200%
  • height=value : Additional attr for IMG.

    It is recommended to use no_map option together.
    e.g.) 100px, 200%
  • (*1): These options do not affect to the inline SVG.

{{graphviz_me}} macro

  • This macro render graph image from the wiki page which includes this macro.

  • Use this macro *commented out* like below. If it is not commented out, renderer fails syntax error.

    // {{graphviz_me()}}
    // {{graphviz_me(option=value)}}
  • options: See graphviz macro.

  • When previewing, this macro output the image into img@src with data scheme. Thus, old browsers can't render it.

{{graphviz_link}} macro

  • This macro render graph image having passing the dot description inline.

    digraph G {...}
    digraph G {...}
  • options: See graphviz macro.


  • On Windows, If you want to use the text which is NOT written in English(Such as Japanese) in the graph, You should specify “fontname” attribute to the object like below.

    somenode [label=“some text in Japanese”, fontname=“MS Gothic”]

    NOTE: “MS Gothic” is just example. You should specify it using real font name. “MS”(ZENAKU) + HANKAKU White space + “Gothic”(ZENAKU KATAKANA)


  • Redmine 3.0.0 or later.

  • ruby 2.2

  • Graphviz

    • There are 2ways about setting up graphviz for this plugin.

    • The one is using Gv which is ruby binding of graphviz.

      • Recommended for unix system.

* The plugin uses fork() and IO.pipe to capture STDERR which holds error message output from Gv.

* The other one is using external dot command which is on the PATH.
  * For Windows system, Only this way of setting is available.

* The dot command is executed twice by the plugin when one graph is rendered. First one to render the image. Second one to create clickable map.

* Example of installed graphviz package.

  e.g.) CentOS 5.5 using Gv.
  e.g.) Ubuntu (10.04) using Gv.
  e.g.) Windows XP Pro SP3(ja) using external dot command.
  • memcached (optional)

Getting the plugin

e.g.) git clone git:// wiki_graphviz_plugin


  1. Copy the plugin tree into #{RAILS_ROOT}/plugins/

  2. Make sure the temporary directory writable by the process of redmine.


    This plugin try to create follwing directory and create tmporary file under it.

  3. Restart Redmine.


  • If you want to use caching feature for rendered images, must configure your cache_store.

  • This plugin expects the store like ActiveSupport::Cache::MemCacheStore which provides marshaling when set/get the value.

  1. Setup caching environment, like memcached.

  2. Configure cache_store.

    e.g.) config/environments/production.rb
    config.action_controller.perform_caching = true
    config.action_controller.cache_store = :mem_cache_store, "localhost"
  3. Restart Redmine.

  4. Login to Redmine as an Administrator.

  5. Setup wiki graphviz-macro settings in the Plugin settings panel.


This plugin is licensed under the GNU GPL v2. See COPYRIGHT.txt and GPL.txt for details.


  • graphviz_link macro by rsilvestri.

My environment

  • CentOS 6.6 x64

  • ruby-2.2.0p0

  • MySQL-server-5.6.17-1.el6.x86_64

  • redmine-3.0.0

  • graphviz-2.38.0-1.el6.x86_64

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