How to automate versioning of Maven project in GitHub? - maven

Question

I am trying to make auto- or semi-auto versioning into GitHub.
I looked into the automation release workflow possibilities and it doesn't seem like anything standard for GitHub.
I want to have an automatic update of version in pom.xml whenever I create a tag on GitHub or whenever I merge into the master branch.

Answer 1

I found a workaround solution with Github Actions that can be extended further. Whenever I release and I manually specify release notes and changelog, so this release version can be taken from github.event.release.tag_name
mvn -B versions:set -DnewVersion=${{ github.event.release.tag_name }} -DgenerateBackupPoms=false
The reference to the actual GitHub workflow is here.
.github/workflows/deploy.yml at the time of writing:
name: Publish package to the Maven Central Repository
on:
release:
types: [created]
jobs:
publish:
runs-on: ubuntu-latest
steps:
- name: Check out Git repository
uses: actions/checkout#v2
- name: Install Java and Maven
uses: actions/setup-java#v1
with:
java-version: 8
- if: github.event.release
name: Update version in pom.xml (Release only)
run: mvn -B versions:set -DnewVersion=${{ github.event.release.tag_name }} -DgenerateBackupPoms=false
- name: Release Maven package
uses: samuelmeuli/action-maven-publish#v1.4.0
with:
maven_profiles: deploy, verify
gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
gpg_passphrase: ${{ secrets.GPG_PASSPHRASE }}
nexus_username: ${{ secrets.OSSRH_USERNAME }}
nexus_password: ${{ secrets.OSSRH_TOKEN }}