automated_docker_release.yml

name: Release image for local development environment

on:
  push:
    branches:
      - master
      - develop

env:
  IMAGE_NAME: ${{ github.repository }}/${{ github.event.repository.name }}

jobs:
  build:
    name: Automated release fo Docker image
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: nelonoel/branch-name@v1.0.1

      - name: Build and tag the image for testing and release
        run: >-
          docker build .
          --file Dockerfile
          --tag docker.pkg.github.com/${IMAGE_NAME}:${BRANCH_NAME}

      - name: Set release tag
        # https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
        run: echo "RELEASE_VERSION=$(printf -- '%s%s\n' $(cat .release-version) $([ ${BRANCH_NAME} = "develop" ] && printf -- '-%s-develop' ${GITHUB_RUN_ID} || echo ""))" >> $GITHUB_ENV

      - name: Login to registry
        run: >-
          docker login
          -u ${{ github.actor }}
          -p ${{ secrets.GITHUB_TOKEN }}
          docker.pkg.github.com

      - name: Tag image with release version
        run: >-
          docker tag
          docker.pkg.github.com/${IMAGE_NAME}:${BRANCH_NAME}
          docker.pkg.github.com/${IMAGE_NAME}:${{ env.RELEASE_VERSION }}

      - name: Push release tag image to registry
        run: >-
          docker push docker.pkg.github.com/${IMAGE_NAME}:${{ env.RELEASE_VERSION }}

      - name: Remove old releases
        uses: snok/container-retention-policy@v2
        with:
          image-names: ${{ github.event.repository.name }}/*
          cut-off: Four months ago UTC
          timestamp-to-use: updated_at
          account-type: org
          org-name: sanger
          keep-at-least: 5
          skip-tags: latest, *[!develop] # This will DELETE any images where the tag contains ANY characters in "develop", excluding '!'
          token: ${{ secrets.REMOVE_OLD_IMAGES }}