Lower Build-Depends on debhelper-compat to version 12 (which should have

ci_container/build.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+# shellcheck disable=SC1004
+
+set -e
+
+images=('debian:buster|buster' 'debian:bullseye|bullseye' 'ubuntu:focal|focal')
+
+BASENAME='exim-encrypt-dlfunc-build'
+TAG='latest'
+REGISTRY='localhost:5000'
+USERNAME='nobody'
+PASSWORD='password'
+
+while getopts "r:u:p:b:t:" OPTION; do
+    case $OPTION in
+        r)
+            REGISTRY="${OPTARG}"
+            ;;
+        u)
+            USERNAME="${OPTARG}"
+            ;;
+        p)
+            PASSWORD="${OPTARG}"
+            ;;
+        b)
+            BASENAME="${OPTARG}"
+            ;;
+        t)
+            TAG="${OPTARG}"
+            ;;
+        *)
+            echo "Invalid argument"
+            exit 127
+    esac
+done
+
+REGHOST="$(echo "${REGISTRY}" | cut -d/ -f1)"
+if [ "${REGISTRY}" != "none" ]; then
+	echo "🔑 Logging into »${REGHOST}«"
+	if ! buildah login --get-login "${REGHOST}" > /dev/null 2> /dev/null; then
+		buildah login --password "${PASSWORD}" --username "${USERNAME}" "${REGHOST}"
+	fi
+fi
+
+for i in "${images[@]}"; do
+	basectr=$(echo "${i}" | cut -d'|' -f1)
+	name=$(echo "${i}" | cut -d'|' -f2)
+
+	ctr="$(buildah from "$basectr")"
+	buildah run "$ctr" /bin/sh -c 'apt-get update; \
+	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install -y \
+	    build-essential \
+	    git \
+	    exim4-dev \
+	    libsodium-dev \
+	    pkg-config \
+	    python3-pip \
+	    exim4-daemon-heavy \
+	    openssl \
+	    meson; \
+	DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install -y \
+	    debhelper \
+	    dh-make \
+	    devscripts \
+	    git-buildpackage \
+	    debsigs \
+	    gpgv1; \
+	pip3 install meson ninja; \
+	rm -rf /var/lib/apt/lists/*; \
+	rm -rf ~/.cache/pip/*;'
+	IMAGENAME="${BASENAME}-${name}"
+	TARGET="${REGISTRY}/${BASENAME}-${name}:${TAG}"
+	echo "⚙️ Assembling »${IMAGENAME}«"
+	IMAGEID=$(buildah commit --format docker "$ctr" "${IMAGENAME}")
+	if [ "${REGISTRY}" != "none" ]; then
+		echo "🚀 Pushing »${TARGET}«"
+		buildah push "${IMAGEID}" "${TARGET}"
+		echo "💡 Finished »${BASENAME}«"
+	fi
+done