CI: run and upload Coverage on Coveralls every sunday at midnight

.github/workflows/test_coverage.yml

@@ -0,0 +1,68 @@
+name: test coverage
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * 0'  # every sunday at midnight
+# paths:
+# - "*"
+# - "!README.md" <-- don't rebuild on doc change
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    container:
+      image: ardupilot/ardupilot-dev-coverage:latest
+      options: --user 1001
+    strategy:
+      fail-fast: false  # don't cancel if a job from the matrix fails
+      matrix:
+        toolchain: [
+            base,  # GCC
+        ]
+        config: [
+            coverage,
+        ]
+    steps:
+      # git checkout the PR
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      # Put ccache into github cache for faster build
+      - name: Prepare ccache timestamp
+        id: ccache_cache_timestamp
+        run: |
+          NOW=$(date -u +"%F-%T")
+          echo "::set-output name=timestamp::${NOW}"
+      - name: ccache cache files
+        uses: actions/cache@v2
+        with:
+          path: ~/.ccache
+          key: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-${{steps.ccache_cache_timestamp.outputs.timestamp}}
+          restore-keys: ${{github.workflow}}-ccache-${{ matrix.toolchain }}-  # restore ccache from either previous build on this branch or on master
+      - name: setup ccache
+        run: |
+          mkdir -p ~/.ccache
+          echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
+          echo "compression = true" >> ~/.ccache/ccache.conf
+          echo "compression_level = 6" >> ~/.ccache/ccache.conf
+          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          ccache -s
+          ccache -z
+      - name: test ${{matrix.config}} ${{ matrix.toolchain }}
+        env:
+          CI_BUILD_TARGET: ${{matrix.config}}
+        shell: 'script -q -e -c "bash {0}"'
+        run: |
+          PATH="/github/home/.local/bin:$PATH"
+          python -m pip install --user mavproxy
+          python -m pip uninstall -y pymavlink
+          git submodule update --init --recursive
+          (cd modules/mavlink/pymavlink && DISABLE_MAVNATIVE=True MDEF="$PWD/../message_definitions" python -m pip install --user .)
+          Tools/scripts/run_coverage.py -f
+
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path-to-lcov: ./reports/lcov-report/lcov.info