Skip to content

Latest commit

 

History

History
31 lines (20 loc) · 1.1 KB

WEBAPP_README.md

File metadata and controls

31 lines (20 loc) · 1.1 KB
Raw

Using Graphviz from the web app

Add Graphviz buildpack in addition to java buildpack so that heroku understands it is a Java app but it also knows it needs to install graphviz.

Graphviz buildpack: https://github.com/weibeld/heroku-buildpack-graphviz Java buildpack: https://github.com/heroku/heroku-buildpack-java

How to use multiple buildpacks:

Execute these before pushing to heroku:

  heroku buildpacks:add --index 1 https://github.com/heroku/heroku-buildpack-java
  heroku buildpacks:add --index 2 https://github.com/weibeld/heroku-buildpack-graphviz.git

Viz.js

Escaping dot result for Viz.js

Here we needed to get the unescaped HTML for dot result. So we used the three curly braces instead of two. Otherwise, instead of "->" we get "-&gt" (greater than symbol is HTML escaped).

For more information, see: https://mustache.github.io/mustache.5.html

Also, do not use quotes, newlines, tabs in dot result. Otherwise, dot text is broken into multiple html elements and graph cannot be created.