Based on https://github.com/millie/heroku-buildpack-phantomjs. For use with https://github.com/ddollar/heroku-buildpack-multi.
For use in a multi buildpack:
- Configure heroku for multiple build packs.
heroku config:set BUILDPACK_URL=https://github.com/ddollar/heroku-buildpack-multi.git
- Add pdftk to
.buildpacks
file
echo "https://github.com/shake-apps/heroku-buildpack-pdftk.git" >> .buildpacks