If you wish to continue development on this please fork it to your own repo.
Use the GraphicsMagick (1.3.25) inside Heroku.
Insert these buildpacks before the main buildpack for your application:
Make sure the
apt buildpack is included before this buildpack.
heroku buildpacks:add --index 1 https://github.com/heroku/heroku-buildpack-apt heroku buildpacks:add --index 2 https://github.com/mcollina/heroku-buildpack-graphicsmagick.git
Include these at the beginning of your
:repo:deb http://http.us.debian.org/debian stretch main libgraphicsmagick1-dev libgraphicsmagick++1-dev libjpeg-turbo libpng-dev zlib1g-dev libjasper-dev libjasper1
The next time you push your application it should install graphicsmagick before your application buildpack.
For more info see Using multiple buildpacks for an app
To change this buildpack, fork it on Github. Push up changes to your fork,
then create a test app with
--buildpack <your-github-url> and push to it.
Commit and push the changes to your buildpack to your Github fork, then push your sample app to Heroku to test. You should see:
-----> Downloading graphicsmagick YOUR_IMAGE_MAGICK_VERSION_HERE
Heroku dropped the cedar stack on November 4th, 2015. If you still need to run this buildpack on cedar for whatever reason you can do by referencing an older version of the buildpack:
heroku buildpacks:add --index 1 https://github.com/mcollina/heroku-buildpack-graphicsmagick.git#35f87dd
Copy the snippet above into CLI.