name: Linux Snap

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

jobs:
  Snap:
    runs-on: ubuntu-latest

    env:
      SNAPCRAFT_BUILD_INFO: 1

    timeout-minutes: 60
    steps:
    - name: Install Snapcraft
      uses: samuelmeuli/action-snapcraft@v1

    - name: Setup LXD
      uses: whywaita/setup-lxd@v1

    - name: Check out code
      uses: actions/checkout@v2
      with:
        # Needed for version determination to work
        fetch-depth: 0

    - name: Set up CCache
      id: setup-ccache
      run: |
        sudo apt-get install ccache
        ccache --max-size=2G
        /snap/bin/lxc profile device add default ccache disk source=${HOME}/.ccache/ path=/root/.ccache

        # Patch snapcraft.yaml to enable ccache
        patch -p1 < .github/workflows/linux-snap.patch

        # Find common base between master and HEAD to use as cache key.
        git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules origin master
        echo "::set-output name=key::$( git merge-base origin/master ${{ github.sha }} )"

    - name: CCache
      uses: actions/cache@v2
      with:
        key: ccache-${{ runner.os }}-${{ steps.setup-ccache.outputs.key }}
        restore-keys: |
          ccache-${{ runner.os }}-
        path: ~/.ccache/**

    - name: Build
      run: |
        # Build the `subsurface` part.
        /snap/bin/snapcraft build --use-lxd subsurface

    - name: Clear CCache stats
      run: ccache --show-stats --zero-stats

    - name: Build and verify the snap
      id: build-snap
      env:
        SNAP_ENFORCE_RESQUASHFS: 0
      run: |
        # Actually build the snap.
        /snap/bin/snapcraft --use-lxd

        sudo snap install review-tools
        /snap/bin/review-tools.snap-review *.snap

        echo "::set-output name=snap-file::$( ls *.snap )"

    - name: Upload the snap
      uses: actions/upload-artifact@v2
      with:
        name: ${{ steps.build-snap.outputs.snap-file }}
        path: ${{ steps.build-snap.outputs.snap-file }}
        if-no-files-found: error