name: build erlang

on:
  workflow_dispatch:
  push:
    tags:
      - 'erlang-*'
  pull_request:
  push:
    branches:
      - '**'

jobs:
  docker:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        v:
          - 22
          - 23
          - 24
          - 25
          - 26

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Login to registry (tags only)
        if: startsWith(github.ref, 'refs/tags/')
        uses: docker/login-action@v3
        with:
          registry: git.chillcog.com
          username: ${{ secrets.REGISTRY_USERNAME }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

      - name: Build & push
        uses: docker/build-push-action@v6
        with:
          context: ./erlang/${{ matrix.v }}
          file: ./erlang/${{ matrix.v }}/Dockerfile
          platforms: linux/amd64,linux/arm64
          push: ${{ startsWith(github.ref, 'refs/tags/') }}
          tags: |
            git.chillcog.com/yolks/erlang:${{ matrix.v }}
            ${{ startsWith(github.ref, 'refs/tags/') && format('git.chillcog.com/yolks/erlang:{0}', github.ref_name) || '' }}