name: Snap.

on:
  push:
    paths-ignore:
      - 'docs/**'
      - '**.md'
  pull_request:
    paths-ignore:
      - 'docs/**'
      - '**.md'

jobs:

  linux:
    name: Ubuntu 18.04
    runs-on: ubuntu-18.04

    env:
      UPLOAD_ARTIFACT: "false"
      ONLY_CACHE: "false"
      MANUAL_CACHING: "4"

    steps:
      - name: Clone.
        uses: actions/checkout@v2
        with:
          submodules: recursive

      - name: First set up.
        run: |
          sudo apt-get update
          sudo apt-get install gcc-8 g++-8 -y
          sudo snap install --classic snapcraft

          # Workaround for snapcraft
          # See https://forum.snapcraft.io/t/13258
          sudo chown root:root /

          md5() {
            md5cache=$(md5sum $1.txt | cut -c -32)
            echo ::set-env name=$1::$md5cache
          }
          keyFor() {
            keyName="${1^^}_CACHE_KEY"
            awk -v RS="" -v ORS="\n\n" '/^  '"$1"':/' snap/snapcraft.yaml > $keyName.txt
            md5 $keyName
          }

          snap run snapcraft --version > CACHE_KEY.txt
          gcc-8 --version >> CACHE_KEY.txt
          echo $MANUAL_CACHING >> CACHE_KEY.txt
          md5 CACHE_KEY

          keyFor cmake
          keyFor ffmpeg

      - name: CMake cache.
        id: cache-cmake
        uses: actions/cache@v1
        with:
          path: parts/cmake
          key: ${{ runner.OS }}-cmake-${{ env.CACHE_KEY }}-${{ env.CMAKE_CACHE_KEY }}

      - name: CMake build.
        if: steps.cache-cmake.outputs.cache-hit != 'true'
        run: sudo snap run snapcraft build --destructive-mode cmake

      - name: FFmpeg cache.
        id: cache-ffmpeg
        uses: actions/cache@v1
        with:
          path: parts/ffmpeg
          key: ${{ runner.OS }}-ffmpeg-${{ env.CACHE_KEY }}-${{ env.FFMPEG_CACHE_KEY }}

      - name: FFmpeg build.
        if: steps.cache-ffmpeg.outputs.cache-hit != 'true'
        run: sudo snap run snapcraft build --destructive-mode ffmpeg

      - name: Telegram Desktop snap build.
        if: env.ONLY_CACHE == 'false'
        run: sudo snap run snapcraft --destructive-mode

      - name: Move artifact.
        if: env.UPLOAD_ARTIFACT == 'true'
        run: |
          artifact_name=$(echo telegram-desktop_*.snap)
          echo ::set-env name=ARTIFACT_NAME::$artifact_name

          mkdir artifact
          mv $artifact_name artifact

      - uses: actions/upload-artifact@master
        if: env.UPLOAD_ARTIFACT == 'true'
        name: Upload artifact.
        with:
          name: ${{ env.ARTIFACT_NAME }}
          path: artifact

      - name: Remove unneeded directories for cache.
        run: |
          sudo rm -rf parts/*/{build,src,ubuntu}
          sudo rm -rf parts/*/state/{stage,prime}