deploy to Github Package Registry from Github Action

Question

I would like to deploy to a GitHub Package Registry from a GitHub Action of a public repo.

I have a yml file for a workflow:

name: My CI

on: [push]
         


        

Answer 1

TL;DR: Just commit the following to .github/workflows/mavenpublish.yml and create a release via the GitHub web page to trigger the process:

name: Maven Package

on:
  release:
    types: [created]

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
      - name: Set up JDK 1.8
        uses: actions/setup-java@v1
        with:
          java-version: 1.8

      - name: Deploy to Github Package Registry
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          mkdir -p ~/.m2
          echo "gh$(echo "$GITHUB_REPOSITORY" | awk -F / '{print $1}')\${env.GITHUB_TOKEN}" > ~/.m2/settings.xml
          REPO="gh::default::https://maven.pkg.github.com/${GITHUB_REPOSITORY}"
          mvn deploy -DaltReleaseDeploymentRepository="${REPO}" -DaltSnapshotDeploymentRepository="${REPO}"

Some more info:

I have built the same thing before for Jenkins and can tell you that you don't need to create a settings.xml nor adapt your pom.xml in your repo.

You can even avoid writing your GitHub Token into the settings.xml (which is more secure).

Also, you don't need to manually add your repo and username, these can be read from the environment.

If you want it to build on push, just change the lines behind on: to [push].

Here`s a real-life example.