/heroku-buildpack-zbar

use ZBAR on heroku with ruby apps

Primary LanguageShell

August 2022 Note: This repo will soon be archived. See this comment for more info.

Heroku buildpack: ZBAR

This is a Heroku buildpack for apps requiring ZBAR as a dependency. It is configured to work with the ruby zbar gem but should work with other stacks. This buildpack also applies a patch to Zbar that fixes some jpeg issues, and is required for ruby zbar to work.

Adding to an existing Ruby App

  1. heroku config:set ZBAR_LIB=vendor/lib/libzbar.so
  2. heroku buildpacks:add --index 1 https://github.com/sheck/heroku-buildpack-zbar

Requirements

  1. The ZBAR_LIB config variable must be set to vendor/lib/libzbar.so. Sharing environment variables between buildpacks is difficult, so it's best to just set it globally.
  2. This buildpack must be loaded before the ruby build pack. Running heroku buildpacks should return:
  === [Your App Name] Buildpack URLs
  1. https://github.com/sheck/heroku-buildpack-zbar
  2. heroku/ruby

if it does not, remove the ruby buildpack and re-add it to move it to the bottom

Todo

(Pull requests welcome)

  • Cache zbar library so future builds are faster

Continuous Integration Setup

Setting up the patched version of Zbar on a CI server can be pain. Here's how I got it running on Circle CI: https://gist.github.com/sheck/475e0c8f2d9f618f1eca