ersatztv-ffmpeg/.github/workflows/multi-platform.yml

name: Docker Publish Multi-Platform

on:
  workflow_dispatch:
  pull_request:
  push:
    branches:
      - main

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ghcr.io/ersatztv/ersatztv-ffmpeg
  RELEASE_VERSION: 7.1.1

jobs:
  build:
    name: Build Docker Images
    runs-on: ${{ matrix.os }}
    if: contains(github.event.head_commit.message, '[no build]') == false
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: amd64
            platform: linux/amd64
            os: ubuntu-latest
          - name: arm64
            platform: linux/arm64
            os: ubuntu-24.04-arm
          - name: arm32v7
            platform: linux/arm/v7
            os: ubuntu-latest
    steps:
      - name: Clean tools folder
        run: cd /opt && find . -maxdepth 1 -mindepth 1 '!' -path ./containerd '!' -path ./actionarchivecache '!' -path ./runner '!' -path ./runner-cache -exec rm -rf '{}' ';'

      - name: Checkout
        uses: actions/checkout@v4

      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}

      - name: Login to container registry
        uses: docker/login-action@v3
        if: ${{ github.ref == 'refs/heads/main' }}
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./images/${{ matrix.platform }}/Dockerfile
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: ${{ matrix.platform }}
          push: ${{ github.ref == 'refs/heads/main' }}
          labels: ${{ steps.meta.outputs.labels }}
          tags: ${{ env.IMAGE_NAME }}
          outputs: type=image,push-by-digest=true,name-canonical=true,push=${{ github.ref == 'refs/heads/main' }}

      - name: Export digest
        if: ${{ github.ref == 'refs/heads/main' }}
        run: |
          mkdir -p ${{ runner.temp }}/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "${{ runner.temp }}/digests/${digest#sha256:}"

      - name: Upload digest
        if: ${{ github.ref == 'refs/heads/main' }}
        uses: actions/upload-artifact@v4
        with:
          name: digests-${{ env.PLATFORM_PAIR }}
          path: ${{ runner.temp }}/digests/*
          if-no-files-found: error
          retention-days: 1
  
  merge:
    if: ${{ github.ref == 'refs/heads/main' }}
    runs-on: ubuntu-latest
    needs:
      - build
    steps:
      - name: Download digests
        uses: actions/download-artifact@v4
        with:
          path: ${{ runner.temp }}/digests
          pattern: digests-*
          merge-multiple: true

      - name: Login to container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            type=semver,pattern={{version}},value=${{ env.RELEASE_VERSION }}
            type=raw,value=latest

      - name: Create manifest list and push
        working-directory: ${{ runner.temp }}/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}