Use GitHub Actions instead of Travis

.github/workflows/test-gnofract4d.yml

@@ -0,0 +1,61 @@
+name: Test Gnofract 4D
+
+on:
+    pull_request:
+      types: [opened, reopened, ready_for_review]
+    push:
+
+jobs:
+  run:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-10.15, ubuntu-20.04]
+        python: [3.7]
+        toxenv: [py]
+        include:
+          - os: ubuntu-18.04
+            python: 3.6
+            toxenv: py
+          - os: ubuntu-16.04
+            python: 3.5
+            toxenv: py
+          - os: ubuntu-latest
+            python: 3.7
+            toxenv: pylint
+
+    env:
+      # For labelling Codecov report
+      OS: ${{ matrix.os }}
+      PYTHON: ${{ matrix.python }}
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install MacOS packages
+        if: ${{ runner.os == 'macOS' }}
+        run: brew install gtk+3 pygobject3
+      - name: Install Ubuntu packages
+        if: ${{ runner.os == 'Linux' }}
+        # libgirepository1.0-dev required to build PyGObject from source
+        run: sudo apt install gir1.2-gtk-3.0 libgirepository1.0-dev xvfb
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install Tox and any other PyPI packages
+        run: pip install tox
+      - name: Build
+        run: python setup.py build
+      - name: Run Tox (MacOS)
+        if: ${{ runner.os == 'macOS' }}
+        run: tox -e ${{ matrix.toxenv }}
+      - name: Run Tox (Linux)
+        if: ${{ runner.os == 'Linux' }}
+        run: xvfb-run --auto-servernum tox -e ${{ matrix.toxenv }}
+      - name: Upload coverage to Codecov
+        if: ${{ matrix.toxenv == 'py' }}
+        uses: codecov/[email protected]
+        with:
+          file: ./coverage.xml
+          env_vars: OS,PYTHON

tox.ini

@@ -7,8 +7,10 @@ deps =
     pytest
     pytest-cov
 
+skip_install = true
+
 commands =
-    pytest {posargs: --cov=fract4d --cov=fract4dgui --cov=fract4d_compiler fract4d fract4dgui fract4d_compiler test.py}
+    pytest {posargs: --cov=fract4d --cov=fract4dgui --cov=fract4d_compiler --cov-report=xml fract4d fract4dgui fract4d_compiler test.py}
 
 passenv = DISPLAY XAUTHORITY HOME
 
@@ -17,6 +19,4 @@ deps =
     pylint
     pytest  # imported by tests
 
-skip_install = true
-
 commands = {toxinidir}/bin/pylint.sh