main.yaml

name: Build and Publish Docker

on:
  pull_request:
    types:
      - closed
    branches:
      - main

permissions:
  contents: write
  packages: write

jobs:
  build:
    if: github.event.pull_request.merged == true
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v3
      with:
        ref: ${{ github.event.pull_request.merge_commit_sha }}
        fetch-depth: '0'

    - name: Bump version and push tag
      id: bump_version
      uses: anothrNick/github-tag-action@1.67.0
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        WITH_V: true
        GIT_API_TAGGING: false # uses git cli

    - name: Set up QEMU
      uses: docker/setup-qemu-action@v2

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v2

    - name: Login to GitHub Container Registry
      uses: docker/login-action@v2
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - id: lower-repo
      shell: pwsh
      run: |
        "::set-output name=repository::$($env:GITHUB_REPOSITORY.ToLowerInvariant())"

    - name: Build and push
      uses: docker/build-push-action@v4
      with:
        context: .
        file: ./Dockerfile
        platforms: linux/amd64,linux/arm64
        push: true
        tags: ghcr.io/${{ steps.lower-repo.outputs.repository }}:latest,ghcr.io/${{ steps.lower-repo.outputs.repository }}:${{ steps.bump_version.outputs.new_tag }}