Custom buildpack that will install pdftk into /app/bin on Heroku. Supports cedar-14, heroku-16, heroku-18 and heroku-20.

Since GCJ was dropped, using: https://launchpad.net/ubuntu/bionic/amd64/gcj-6-jdk/6.4.0-14ubuntu1

which needs: https://launchpad.net/ubuntu/bionic/amd64/gcj-6/6.4.0-14ubuntu1 https://launchpad.net/ubuntu/bionic/amd64/gcj-6-jre/6.4.0-14ubuntu1 https://launchpad.net/ubuntu/bionic/amd64/gcj-6-jre-headless/6.4.0-14ubuntu1 https://launchpad.net/ubuntu/bionic/amd64/gcj-6-jre-lib/6.4.0-14ubuntu1

https://launchpad.net/ubuntu/bionic/amd64/libgcj-bc/6.4.0-3ubuntu1 https://launchpad.net/ubuntu/bionic/amd64/libgcj17/6.4.0-14ubuntu1 https://launchpad.net/ubuntu/bionic/amd64/libgcj17-dev/6.4.0-14ubuntu1 https://launchpad.net/ubuntu/bionic/amd64/libgcj17-awt/6.4.0-14ubuntu1 https://launchpad.net/ubuntu/bionic/amd64/libgcj-common/1:6.4-3ubuntu1

https://launchpad.net/ubuntu/bionic/amd64/ecj-gcj/3.11.1-2 https://launchpad.net/ubuntu/bionic/amd64/ecj1/3.11.1-2 https://launchpad.net/ubuntu/bionic/amd64/libecj-java/3.16.0-1~18.04 https://launchpad.net/ubuntu/bionic/amd64/libecj-java-gcj/3.11.1-2

1. Add this buildpack to your app.
2. Add the libgcj.so.* to your search path: heroku config:set LD_LIBRARY_PATH=/app/bin
3. Use /app/bin/pdftk. BTW, the default PATH includes /app/bin, so this might happen automatically.

Update the tarball_url line in scripts/build.sh

heroku create

heroku config:set BUILDPACK_URL=https://github.com/fxtentacle/heroku-buildpack-apt

git push heroku master

Now you'll have a new Heroku app on the default stack that runs the scripts/build.sh script in this buildpack. That script will download the most recent PDFTK source and configure it with default options.

Use heroku logs -t to see when compilation is done. It'll start showing dots..

heroku open

1. Download the generated pdftk.zip
2. Chmod x them
3. put them into binaries-$STACK/ into this buildpack. $STACK shall be the name of your stack as given in the Heroku $STACK variable.

heroku ps:scale web=0 to turn off the dyno.