Script to build Exim with ARC support in a Debian Docker container

build_exim4_deb_with_arc.sh

#!/bin/bash -ue

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Script to build Exim with ARC support in a Debian Docker container
# Author: Masaki Waga
# Email: mwaga@fos.kuis.kyoto-u.ac.jp
# Date: 2024-01-05

# Name of the Docker container
CONTAINER_NAME="exim4-arc-builder"

# Create and start the container
docker run --platform linux/amd64 -dit --name $CONTAINER_NAME debian:bookworm bash

# Execute the commands in the container using a here document
docker exec -i $CONTAINER_NAME bash << 'EOF'
sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/debian.sources
apt-get update
apt-get install dpkg-dev devscripts gdebi --yes
apt-get source exim4
apt build-dep exim4 -y
EXIM_VERSION=$(ls | grep 'exim4-' | head -n 1 | cut -d '-' -f 2)
export EXIM_VERSION
cd exim4-$EXIM_VERSION
EXPERIMENTAL_ARC=yes dpkg-buildpackage -rfakeroot -b -uc -us
cd ..
# Use gdebi to install exim4-daemon-light along with its dependencies
gdebi -n ./exim4-daemon-light_$EXIM_VERSION*.deb
# Experimental_ARC should be included in the list of supported features
/usr/sbin/exim -bV
EOF

# Copy the resulting .deb files from the container to the host
docker exec $CONTAINER_NAME bash -c 'tar -cvf /tmp/debs.tar *.deb'
docker cp $CONTAINER_NAME:/tmp/debs.tar .
tar xvf ./debs.tar
rm debs.tar

# Stop and remove the container
docker stop $CONTAINER_NAME
docker rm $CONTAINER_NAME

echo "Script completed. The .deb files are in the current directory."