## Use case Install packages from a PPA while having its maintainerscripts executed ## Context Using stage-packages directive I was able to do the following (minimal reproduction): ```yaml name: keystone summary: Openstack Keystone license: Apache-2.0 description: | Ubuntu distribution of OpenStack Keystone version: antelope base: ubuntu:22.04 platforms: amd64: parts: cloud-archive: plugin: nil build-packages: - software-properties-common override-pull: | add-apt-repository cloud-archive:antelope apt update craftctl default keystone: after: [cloud-archive] plugin: nil stage-packages: - keystone ``` Looking to the LXC build container, I have: ```bash root@rockcraft-my-rock-name-52836265:~# find . -name "keystone*.deb" ./.cache/rockcraft/download/keystone-common_22.0.0+git2023011009.7d4047cb-0ubuntu1~cloud0_all.deb ./.cache/rockcraft/download/keystone_22.0.0+git2023011009.7d4047cb-0ubuntu1~cloud0_all.deb ./parts/keystone/stage_packages/keystone-common_22.0.0+git2023011009.7d4047cb-0ubuntu1~cloud0_all.deb ./parts/keystone/stage_packages/keystone_22.0.0+git2023011009.7d4047cb-0ubuntu1~cloud0_all.deb ``` These are the right version. Trying the same with overlay step: ```diff diff repro-stage/rockcraft.yaml repro-overlay/rockcraft.yaml 25c25 < stage-packages: --- > overlay-packages: ``` Inside the LXC build container, I have: ``` root@rockcraft-my-rock-name-52836265:~# find . -name "keystone*.deb" ./overlay/packages/var/cache/apt/archives/partial/keystone-common_2%3a21.0.0-0ubuntu1_all.deb ./overlay/packages/var/cache/apt/archives/partial/keystone_2%3a21.0.0-0ubuntu1_all.deb ./overlay/packages/var/cache/apt/archives/keystone_2%3a21.0.0-0ubuntu1_all.deb ./overlay/packages/var/cache/apt/archives/keystone-common_2%3a21.0.0-0ubuntu1_all.deb ``` These are the distro versions you get from Jammy naturally. From what I understand, what I do in `override-pull` updates the sources on the LXC container. When downloading packages in pull step for `overlay-packages`, the command is chrooted in the overlay and therefore does not have the modification in the sources. Is there an easy way to modify the sources and have the cache updated in the overlay layer ? ## Modifying the overlay directly <details> <summary>very wrong way</summary> ```yaml name: keystone summary: Openstack Keystone license: Apache-2.0 description: | Ubuntu distribution of OpenStack Keystone version: antelope base: ubuntu:22.04 platforms: amd64: parts: cloud-archive: plugin: nil overlay-packages: - software-properties-common overlay-script: | mount /etc/resolv.conf $CRAFT_OVERLAY/etc/resolv.conf --bind mount proc $CRAFT_OVERLAY/proc -t proc mount sysfs $CRAFT_OVERLAY/sys -t sysfs mount /dev $CRAFT_OVERLAY/dev --rbind --make-private chroot $CRAFT_OVERLAY stat /dev/null chroot $CRAFT_OVERLAY add-apt-repository cloud-archive:antelope chroot $CRAFT_OVERLAY apt update chroot $CRAFT_OVERLAY bash -c "DEBIAN_FRONTEND=noninteractive apt install apache2 keystone --yes" umount --recursive $CRAFT_OVERLAY/dev umount $CRAFT_OVERLAY/sys umount $CRAFT_OVERLAY/proc umount $CRAFT_OVERLAY/etc/resolv.conf ``` </details> ## Question What's the expected way to enable a PPA inside an overlay layer ? Is there a way from `override-pull` to modify apt sources lists meaningfully ?