diff --git a/elements/apt-preferences/README.md b/elements/apt-preferences/README.md new file mode 100644 index 000000000..76836f958 --- /dev/null +++ b/elements/apt-preferences/README.md @@ -0,0 +1,6 @@ +# Create package pins for apt systems if packages need to be held back + +For APT based systems, you specify package priorities in the apt preferences file. +This element reads the given manifest file, specified in `DIB_DPKG_MANIFEST`, to +set pins to enable pinning of older versions for the given packages. + diff --git a/elements/apt-preferences/extra-data.d/99-set-apt-package-pins b/elements/apt-preferences/extra-data.d/99-set-apt-package-pins new file mode 100755 index 000000000..537d24571 --- /dev/null +++ b/elements/apt-preferences/extra-data.d/99-set-apt-package-pins @@ -0,0 +1,49 @@ +#!/bin/bash +# +# Copyright 2014 Hewlett-Packard Development Company, L.P. +# +# 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. + +set -eu +set -o pipefail + +# exit directly if DIB_DPKG_MANIFEST is not defined properly +if [ -z "$DIB_DPKG_MANIFEST" ]; then + echo "DIB_DPKG_MANIFEST must be set to the location of a manifest file you wish to use" + exit 0 +elif [ ! -f "$DIB_DPKG_MANIFEST" -o ! -s "$DIB_DPKG_MANIFEST" ]; then + echo "$DIB_DPKG_MANIFEST is not a valid manifest file." + echo "You should assign a proper manifest file in DIB_DPKG_MANIFEST" + exit 1 +fi + +DIB_DPKG_MANIFEST=$(readlink -f $DIB_DPKG_MANIFEST) + +# Create the preferences file from the given manifest +outfile=$(mktemp) +for package in $(jq -r ".packages[].package" $DIB_DPKG_MANIFEST); do + version=$(jq -r ".packages[] | select(.package == \"${package}\") |\ + .version" $DIB_DPKG_MANIFEST) + cat << EOF >> $outfile +Package: ${package} +Pin: version ${version} +Pin-Priority: 1001 + +EOF +done + +if [ -s $outfile ]; then + sudo mv $outfile $TMP_MOUNT_PATH/etc/apt/preferences +else + rm $outfile +fi