debian: Create local apt repo after build

Provide local APR repository as part of the result in the distribution's
build result folder and prepare this folder as a local APT repository for
easy install on a target system.

Tracked-On: #6688
Signed-off-by: Helmut Buchsbaum <helmut.buchsbaum@opensource.tttech-industrial.com>

debian/docker/Dockerfile

@@ -225,6 +225,7 @@ RUN apt-get -y update && apt-get install -y --no-install-recommends \
     equivs \
     git-buildpackage \
     lintian \
+    apt-utils \
     sudo
 
 
@@ -237,8 +238,6 @@ WORKDIR /source/
 # Get default settings and helper scripts
 ADD gbp.conf /etc/git-buildpackage/
 ADD debian-pkg-build.sh /usr/local/bin/debian-pkg-build.sh
+ADD create-apt-repo.sh /usr/local/bin/create-apt-repo.sh
 ADD lintian.sh /usr/local/bin/lintian.sh
 
-###############################################################################
-# build Debian packages
-ENTRYPOINT ["/usr/local/bin/debian-pkg-build.sh"]

debian/docker/acrn-docker-build.sh

@@ -39,6 +39,13 @@ ${DOCKER} run \
     --rm \
     -e UID=$(id -u) \
     -e GID=$(id -g) \
-    -v $(pwd):/source acrn-pkg-builder:${DISTRO} -F --no-sign --git-export-dir=build/${DISTRO} "$@"
+    -v $(pwd):/source --entrypoint /usr/local/bin/debian-pkg-build.sh acrn-pkg-builder:${DISTRO} -F --no-sign --git-export-dir=build/${DISTRO} "$@"
+
+# create local apt repository
+${DOCKER} run \
+    --rm \
+    -e UID=$(id -u) \
+    -e GID=$(id -g) \
+    -v $(pwd):/source --entrypoint create-apt-repo.sh acrn-pkg-builder:${DISTRO} build/${DISTRO}
 
 popd >/dev/null

debian/docker/create-apt-repo.sh

@@ -0,0 +1,31 @@
+#!/bin/bash -e
+
+# helper to create local APT repository includeing all package available in
+# the docker images's local apt repo
+
+if [ $# -ne 1 ]; then
+   echo "Call with: $(basename ${BASH_SOURCE[0]}) <path to local apt directory>" >&2
+   exit 1
+fi
+
+if [ ! -d $1 ]; then
+   echo "Please create target directory $1 before calling this script!" >&2
+   exit 1
+fi
+
+if [[ -n ${UID} && -n ${GID} ]]; then
+    addgroup --gid ${GID} docker-build
+    adduser --uid=${UID} --gid=${GID} --disabled-password --gecos '' docker-build
+else
+    echo "UID/GID not set. Use docker run -e UID=$(id -u) -e GID=$(id -g)" >&2
+    exit 1
+fi
+
+# copy all Debian packages in local APT repo and create local APT repository
+export HOME=$(echo ~docker-build)
+sudo -E -u docker-build /bin/bash -c "\
+    cd $1 && cp /opt/apt/*.deb . && \
+    apt-ftparchive packages . > Packages && \
+    cp /opt/apt/.Release.header Release && \
+    apt-ftparchive release . >> Release"
+