Dockerfile to build DEB packages regardless of host OS

packaging/deb/Dockerfile

@@ -0,0 +1,16 @@
+# Use a base image with a Linux distribution of your choice
+# that supports RPM package building, e.g., CentOS or Fedora.
+
+ARG base=debian:stable
+FROM ${base}
+
+# Install necessary packages to build DEB
+RUN apt-get update && \
+    apt-get install -y git dpkg-dev && \
+    apt-get install -y autoconf automake debhelper libtool && \
+    rm -rf /var/lib/apt/lists/*
+
+# Set up the build script to be executed on docker run
+COPY entrypoint.sh /root
+WORKDIR /root
+ENTRYPOINT /root/entrypoint.sh

packaging/deb/build.sh

@@ -0,0 +1,16 @@
+#!/bin/sh -eu
+
+# This script only relies on access to GitHub and can be run from anywhere.
+# Resulting packages will be placed in the current working directory.
+# Environment variables:
+# GIT_BRANCH - which branch to build
+# BASE - which distribution to use for packaging
+
+GIT_BRANCH=${GIT_BRANCH:='master'}
+BASE=${BASE:='debian:stable'}
+
+docker buildx build -t glb-builder-${BASE} --build-arg base=${BASE} \
+       https://github.com/codership/glb.git\#${GIT_BRANCH}:packaging/deb/
+mkdir ${BASE} # output dir for packages
+docker run -v ${PWD}:/output --env GIT_BRANCH=${GIT_BRANCH} \
+       --env BASE=${BASE} glb-builder-${BASE}

packaging/deb/entrypoint.sh

@@ -0,0 +1,21 @@
+#!/bin/bash -eu
+
+# Clone the GitHub repository using the specified branch
+git clone --depth 1 --branch ${GIT_BRANCH:='master'} https://github.com/codership/glb /root/glb
+cd glb
+
+# Build the DEB package
+dpkg-buildpackage -uc -us
+
+# Verify if the DEB build was successful
+if [ $? -eq 0 ]; then
+  echo "DEB package built successfully."
+else
+  echo "Error: DEB package build failed."
+  exit 1
+fi
+
+# Move the DEB package to the mounted volume
+OUTPUT=/output/${BASE}/
+mv /root/*.deb ${OUTPUT}
+echo "DEB package moved to: ${OUTPUT}"

packaging/rpm/build.sh

@@ -6,9 +6,11 @@
 # GIT_BRANCH - which branch to build
 # BASE - which distribution to use for packaging
 
-export GIT_BRANCH=${GIT_BRANCH:='master'}
-export BASE=${BASE:='rockylinux:8'}
+GIT_BRANCH=${GIT_BRANCH:='master'}
+BASE=${BASE:='rockylinux:8'}
 
 docker buildx build -t glb-builder-${BASE} --build-arg base=${BASE} \
        https://github.com/codership/glb.git\#${GIT_BRANCH}:packaging/rpm/
-docker run -v ${PWD}:/output --env GIT_BRANCH=${GIT_BRANCH} glb-builder-${BASE}
+mkdir ${BASE} # output dir for packages
+docker run -v ${PWD}:/output --env GIT_BRANCH=${GIT_BRANCH} \
+       --env BASE=${BASE} glb-builder-${BASE}

packaging/rpm/entrypoint.sh

@@ -31,5 +31,6 @@ else
 fi
 
 # Move the RPM package to the mounted volume
-mv "${RPMBUILD_DIR}/RPMS/x86_64/"*.rpm "/output/"
-echo "RPM package moved to: /output/"
+OUTPUT="/output/${BASE}"
+mv "${RPMBUILD_DIR}/RPMS/x86_64/"*.rpm "${OUTPUT}"
+echo "RPM package moved to: ${OUTPUT}"