name: Build Container

on:
  push:
    branches-ignore:
      - master
  pull_request:
    branches:
      - master

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository_owner }}/qbittorrent

jobs:
  check:
    runs-on: ubuntu-latest
    outputs:
      old_ver: ${{ steps.check_ver.outputs.old_ver }}
      new_ver: ${{ steps.check_ver.outputs.new_ver }}
    steps:
      - name: Check version
        id: check_ver
        run: |
          get_ver() (curl -s "$@" | grep -Po "(\d+\.)+\d+\-r\d+" | head -1)
          OLD_VER=$(get_ver ${GHCO_URL})
          NEW_VER=$(get_ver ${ALPINE_PKG_URL})
          echo "::set-output name=old_ver::${OLD_VER}"
          echo "::set-output name=new_ver::${NEW_VER}"
        env:
          ALPINE_PKG_URL: https://pkgs.alpinelinux.org/package/edge/testing/x86_64/qbittorrent-nox
          GHCO_URL: https://github.com/mogeko/docker-qbittorrent/pkgs/container/qbittorrent

  build:
    runs-on: ubuntu-latest
    needs: check
    if: ${{ needs.check.outputs.old_ver != needs.check.outputs.new_ver }}
    permissions:
      packages: write
      contents: read
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@548e2346a9987b56d8a4104fe776321ff8e23440
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=edge
            type=schedule,pattern={{date 'YYYYMMDD'}}
            type=raw,${{ needs.check.outputs.new_ver }}
            type=raw,latest

      - name: Save status
        run: echo ${{ toJSON(steps.meta.outputs.json) }} > ${{ github.workspace }}/status.json

      - name: Update status
        uses: actions/upload-artifact@v2
        with:
          name: status
          path: ${{ github.workspace }}/status.json