Provide a minimal CI workflow using GH actions

The biggest obstacle here was codecov's GH action which had some
really obscure logging and whose default XML exporting did not
work out of the box this time, extending our customized coverage
analysis further.

.github/workflows/ci.yml

@@ -0,0 +1,92 @@
+name: GH Actions
+
+on:
+  pull_request:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+
+jobs:
+
+  original-travis-ci-job:
+    name: Linux ${{ matrix.install_variant }} with Python ${{ matrix.python-version }}
+    runs-on: ubuntu-latest
+    env:
+      DISPLAY: ':99.0'
+
+    strategy:
+      matrix:
+        python-version: [3.7, 3.8, 3.9]
+        install_variant: ["pip"]
+        include:
+        - python-version: 3.7
+          install_variant: "rpm.fedora.31"
+        - python-version: 3.8
+          install_variant: "rpm.fedora.32"
+        - python-version: 3.6
+          install_variant: "deb.ubuntu.bionic"
+        - python-version: 3.7
+          install_variant: "deb.ubuntu.focal"
+      fail-fast: false
+
+    steps:
+      - run: echo "Job triggered by a ${{ github.event_name }} event on branch is ${{ github.ref }} in repository is ${{ github.repository }}, runner on ${{ runner.os }}"
+      - name: Check out repository code
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Cache large ML models
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/torch/hub/checkpoints
+          key: fasterrcnn-258fb6c6+maskrcnn-bf2d0c1e
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+          cache-dependency-path: 'packaging/pip_requirements.txt'
+        if: matrix.install_variant == 'pip'
+      - name: Display Python version
+        run: python -c "import sys; print(sys.version)"
+        if: matrix.install_variant == 'pip'
+      - name: Install non-python dependencies using system packager
+        run: |
+          # ocr
+          sudo apt-get -y install pkg-config tesseract-ocr libtesseract-dev
+          # xdotool
+          sudo apt-get -y install xdotool x11-apps imagemagick
+          # vncdotool
+          sudo apt-get -y install xfonts-base x11vnc
+          # pyautogui
+          sudo apt-get -y install scrot
+        if: matrix.install_variant == 'pip'
+      - name: Install any dependencies and build the package
+        run: pip --default-timeout=60 install -r packaging/pip_requirements.txt
+        if: matrix.install_variant == 'pip'
+      - run: sleep 3
+      - name: Prepare virtual screen (fake display)
+        run: |
+          sudo apt-get -y install libx11-dev libxtst-dev xvfb vim-common
+          sudo apt-get install -y x11-utils libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0
+          Xvfb :99 -screen 0 1024x768x24 &> /tmp/xvfb.log  &
+          sudo touch ~/.Xauthority
+          sudo xauth -f ~/.Xauthority add ${HOST}:99 . $(xxd -l 16 -p /dev/urandom)
+          sudo chmod a+rxw ~/.Xauthority
+          # give xvfb some time to start
+          sleep 3
+      - name: Run current semi-isolation semi-integration tests (to be separated in the future)
+        run: |
+          if [[ ${{ matrix.python-version }} == '3.9' ]]; then export DISABLE_AUTOPY=1; fi
+          if [[ ${{ matrix.install_variant }} != "pip" ]]; then cd packaging && bash packager_docker.sh;
+          else cd tests && bash coverage_analysis.sh; fi
+        env:
+          INSTALL_VARIANT: ${{ matrix.install_variant }}
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          files: tests/coverage.xml
+          verbose: true
+        if: matrix.install_variant == 'pip'
+      - run: echo "🥑 This job's status is ${{ job.status }}."

tests/coverage_analysis.sh

@@ -9,4 +9,7 @@ readonly submit="${SUBMIT:-0}"
 $coverage run --source="$libpath" -m unittest discover -v -s ../tests/
 # use -i to ignore errors from pythong cache files and other traced dependencies
 $coverage report -m -i
+# codecov is poorly documented and even in verbose mode and various directory changes
+# won't tell us where it runs the xml command and why it ends up not finding it
+$coverage xml
 if [[ $submit == 1 ]]; then codecov; fi