PPA Builder

This is a collection of scripts to build PPAs using Docker.

Setup

Create a file env.sh with the following contents:

export DEBFULLNAME="..."
export DEBEMAIL="..."
export PPANAME="..."

Where these are the values required for code-signing packages and uploading to the appropriate PPA on launchpad.net.

Note that the PPANAME does not include the part after the /, as that is specified by the build scripts.

Building

To build images and run all of the build-*.sh scripts:

make

libvips

The build-vips.sh script builds the latest version of libvips that's available (in the Ubuntu distribution identified at the top of the script in the SOURCE_DIST variable) for Ubuntu 20.04 and 22.04.

Troubleshooting

The builds don't always go smoothly. You'll see in each build script that I've had to make adjustments to the build scripts in order to have them succeed on the older distribution.

To troubleshoot you need to be interactive in the docker container. Use make run:22.04 etc to run the container interactively. Inside the container, run /build-init.sh to setup the gpg daemon and then you can manually run whichever /build-*.sh script you need to troubleshoot. The build output is created in /tmp/build-*.

If you run builds manually, such as by manually issuing the commands in the build scripts, remember to import the environment variables so that signing works.

source /env.sh

Typically builds fail with dependencies that aren't available in the backported system, in which case I've edited the debian/control file to change them and then run apt-get build-dep -y . in the source folder (e.g. /tmp/build-vips/vips-8.15.2). Finally build the package to check that it will build. All of these commands are in the build-*.sh script.

It can also help to compare to the source for the package in the current distribution. Disable the apt configuration for the unstable Ubuntu distribution in /etc/apt/sources.list.d/ubuntu-unstable-sources.list and then repeat the apt-get -q -y source ... step from the build script in a new directory.

Updating

Before building, check the name of the latest Ubuntu distribution at http://archive.ubuntu.com/ubuntu/dists/ and update the build-*.sh scripts to use that distribution in the SOURCE_DIST variable. This is how we get the latest available versions to backport.