Using docker for building a maven project with alternative JDKs.

docker.maven.sh

#!/bin/sh
# https://gist.github.com/onacit/9f79215aaf6bd8d59e78ed6a38b93889
# https://stackoverflow.com/questions/3545292/how-to-get-maven-project-version-to-the-bash-command-line
if [ $# -lt 2 ]; then
    echo "Usage: $0 <tag> <phases...>, e.g. $0 3-jdk-11-openj9 clean install"
    echo "See https://hub.docker.com/_/maven for available tags"
    exit 1
fi
groupId=$(mvn help:evaluate -Dexpression=project.groupId | grep -v '\[')
artifactId=$(mvn help:evaluate -Dexpression=project.artifactId | grep -v '\[')
version=$(mvn help:evaluate -Dexpression=project.version | grep -v '\[')
tag="$1"
shift
docker run -it --rm \
       --name "$artifactId" \
##       -v "$HOME/.m2":/root/.m2 \
       -v "$HOME/.m2/repository":/root/.m2/repository \
       -v "$HOME/.m2/settings.xml":/root/.m2/settings.xml \
       -v "$(pwd)":/usr/src/"$groupId"/"$artifactId"/"$version" \
       -w /usr/src/"$groupId"/"$artifactId"/"$version" \
       maven:"$tag" mvn "$@"