build-container.yml

# Based on the example from https://docs.github.com/en/actions/publishing-packages/publishing-docker-images
name: Create and publish a Docker image

on:
  push:
    branches:
      - 'master'
    tags:
      - 'v*'

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: gluon-build

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    permissions: write-all
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
      - name: Log in to the Container registry
        uses: docker/login-action@b4bedf8053341df3b5a9f9e0f2cf4e79e27360c6
        if: ${{ github.repository_owner == 'freifunk-gluon' }}
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@879dcbb708d40f8b8679d4f7941b938a086e23a7
        with:
          images: ${{ env.REGISTRY }}/freifunk-gluon/${{ env.IMAGE_NAME }}
      - name: Build and push Docker image
        uses: docker/build-push-action@4c1b68d83ad20cc1a09620ca477d5bbbb5fa14d0
        with:
          context: ./contrib/docker
          push: ${{ github.repository_owner == 'freifunk-gluon' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}