mkosi: Introduce build image

We want the exitrd image to be built with the latest systemd as well.
As the exitrd image is built as part of mkosi.images, and all subimages
are built before the main image, this implies the packages must be built
as a subimage in mkosi.images/ as well. So we introduce the build image and
move all logic related to building distribution packages there.

This also has the nice side effect of slimming down the main image as the
build dependencies are not installed into the main image anymore. It also
makes sure the packages are built in a "clean" chroot without any of the
other packages which we install in the main image available.

1 files changed, 0 insertions, 29 deletions

diff --git a/mkosi.conf.d/10-debian-ubuntu/mkosi.postinst b/mkosi.conf.d/10-debian-ubuntu/mkosi.postinst
deleted file mode 100755
index 314f235f5f..0000000000
--- a/mkosi.conf.d/10-debian-ubuntu/mkosi.postinst
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: LGPL-2.1-or-later
-set -e
-
-# By default Suggests are not installed (and often Recommends are disabled too), which means we will miss
-# the dlopen optional dependencies, but the tests need them, so parse them from the package metadata and
-# install them. This is not an issue when building locally, as the build and runtime images are the same,
-# so they would get installed as build dependencies anyway.
-
-if [ "$1" = "build" ] || ! ((NO_BUILD)); then
-    exit 0
-fi
-
-# Query the Recommends and Suggests of all systemd packages, by matching on the version
-systemd_version="$(dpkg-query --showformat '${Version}' --show systemd)"
-mapfile -t systemd_packages < <( dpkg --list | grep '^ii' | grep "$systemd_version" | awk '{print $2}' | tr '\n' ' ' )
-extra_packages=()
-# shellcheck disable=SC2068
-for package in ${systemd_packages[@]}; do
-    # We are looking for dlopens, so filter for libraries
-    mapfile -t -O "${#extra_packages[@]}" extra_packages < <(dpkg-query --showformat '${Suggests}' --show "$package" | sed -e "s/, /\n/g" -e "s/|.*//" | grep "lib")
-    mapfile -t -O "${#extra_packages[@]}" extra_packages < <(dpkg-query --showformat '${Recommends}' --show "$package" | sed -e "s/, /\n/g" -e "s/|.*//" | grep "lib")
-done
-
-if [ "${#extra_packages[@]}" -eq 0 ]; then
-    exit 0
-fi
-
-apt install "${extra_packages[@]}"