name: Build FFmpeg

on:
  push: []
  repository_dispatch:
    types: [build]
  schedule:
    - cron: '0 12 * * *'

jobs:
  build_base:
    name: Build base image
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Login to Docker
        uses: docker/login-action@v1
        with:
          registry: docker.pkg.github.com
          username: ${{ github.actor }}
          password: ${{ github.token }}
      - name: Pull latest
        run: docker pull docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base:latest || true
      - name: Build base image
        run: |
          IMG="docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base:latest"
          docker build --pull --cache-from "$IMG" --tag "$IMG" images/base
      - name: Push base image
        run: docker push docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base:latest
  build_target_bases:
    name: Build target base image
    needs: build_base
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        target: [win64]
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Login to Docker
        uses: docker/login-action@v1
        with:
          registry: docker.pkg.github.com
          username: ${{ github.actor }}
          password: ${{ github.token }}
      - name: Pull latest
        run: docker pull docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base-${{ matrix.target }}:latest || true
      - name: Build target base image
        run: |
          IMG="docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base-${{ matrix.target }}:latest"
          docker build --pull --build-arg GH_REPO=${GITHUB_REPOSITORY,,} --cache-from "$IMG" --tag "$IMG" images/base-${{ matrix.target }}
      - name: Push target base image
        run: docker push docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base-${{ matrix.target }}:latest
  build_targets:
    name: Build target-variant image
    needs: build_target_bases
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        target: [win64]
        variant: [gpl,lgpl,gpl-vulkan,lgpl-vulkan,gpl-4.3,lgpl-4.3,gpl-shared,lgpl-shared,gpl-vulkan-shared,lgpl-vulkan-shared,gpl-4.3-shared,lgpl-4.3-shared]
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Generate Dockerfile
        run: ./generate.sh ${{ matrix.target }} ${{ matrix.variant }}
      - name: Login to Docker
        uses: docker/login-action@v1
        with:
          registry: docker.pkg.github.com
          username: ${{ github.actor }}
          password: ${{ github.token }}
      - name: Pull latest
        run: docker pull docker.pkg.github.com/${GITHUB_REPOSITORY,,}/${{ matrix.target }}-${{ matrix.variant }}:latest || true
      - name: Build variant image
        run: |
          IMG="docker.pkg.github.com/${GITHUB_REPOSITORY,,}/${{ matrix.target }}-${{ matrix.variant }}:latest"
          docker build --pull --cache-from "$IMG" --tag "$IMG" .
      - name: Push variant image
        run: docker push docker.pkg.github.com/${GITHUB_REPOSITORY,,}/${{ matrix.target }}-${{ matrix.variant }}:latest
  build_ffmpeg:
    name: Build ffmpeg
    needs: build_targets
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        target: [win64]
        variant: [gpl,lgpl,gpl-vulkan,lgpl-vulkan,gpl-4.3,lgpl-4.3,gpl-shared,lgpl-shared,gpl-vulkan-shared,lgpl-vulkan-shared,gpl-4.3-shared,lgpl-4.3-shared]
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Login to Docker
        uses: docker/login-action@v1
        with:
          registry: docker.pkg.github.com
          username: ${{ github.actor }}
          password: ${{ github.token }}
      - name: Build ffmpeg
        run: ./build.sh ${{ matrix.target }} ${{ matrix.variant }}
      - name: Upload artifacts
        uses: actions/upload-artifact@v2
        with:
          name: ffmpeg
          path: artifacts/*
  publish_release:
    name: Publish release
    if: github.event_name != 'push'
    needs: build_ffmpeg
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Download artifacts
        uses: actions/download-artifact@v2
        with:
          name: ffmpeg
          path: artifacts
      - name: Create release
        run: |
          set -xe
          NAME="Auto-Build $(date +'%Y-%m-%d %H:%M')"
          TAGNAME="autobuild-$(date +'%Y-%m-%d-%H-%M')"
          hub release create $(for a in artifacts/*; do echo -a $a; done) -m "$NAME" -t "master" "$TAGNAME"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - name: Prune old releases
        run: ./util/prunetags.sh
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}