A simple script to update a pom.xml for the latest updates

check-updates

#!/usr/bin/env bash

DEPENDS=$(xmlstarlet sel -N x='http://maven.apache.org/POM/4.0.0' \
                -t -m x:project/x:dependencies/x:dependency \
                -v x:artifactId -o ' ' \
                pom.xml)

if [ ! -f update-center.actual.json ]; then
    wget https://updates.jenkins.io/update-center.actual.json;
fi;

NEWEST_CORE=2.7.3

for d in $DEPENDS; do
    VERSION=$(jq -r ".plugins[\"${d}\"].version" < update-center.actual.json)
    echo "> ${d} should be ${VERSION}"

    DEPEND_CORE=$(jq -r ".plugins[\"${d}\"].requiredCore" < update-center.actual.json)
    if python -c "from distutils.version import StrictVersion; import sys; sys.exit(0 if StrictVersion('"${DEPEND_CORE}"') > StrictVersion('"${NEWEST_CORE}"') else 1)"; then
      NEWEST_CORE=${DEPEND_CORE}
      echo "New core: ${NEWEST_CORE}"
    fi
    
    # Thanksk to this post for enough pointers
    # https://stackoverflow.com/questions/51785967/xmlstarlet-select-and-update-xml
    xmlstarlet ed \
        --ps --inplace \
        -N x='http://maven.apache.org/POM/4.0.0' \
        -u "//x:artifactId[.='${d}']/following-sibling::x:version[1]" \
        -v ${VERSION} \
        pom.xml
done;

echo "Updating jenkins.version to ${NEWEST_CORE}"
sed -i '' "s/<jenkins\.version>.*<\/jenkins.version>/<jenkins.version>$NEWEST_CORE<\/jenkins.version>/" pom.xml