Add CI workflow for GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,90 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  qa:
+    name: QA
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        toxenv:
+          - checkqa
+          - readme
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+      - name: Set PY
+        run: echo "::set-env name=PY::$(python -VV | sha256sum | cut -d' ' -f1)"
+      - uses: actions/cache@v1
+        with:
+          path: ~/.cache/pre-commit
+          key: pre-commit|${{ env.PY }}|${{ hashFiles('.pre-commit-config.yaml') }}
+      - name: Install tox
+        run: pip install tox
+      - name: Test ${{ matrix.toxenv }}
+        run: tox -e ${{ matrix.toxenv }}
+
+  cpython:
+    name: Test
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      matrix:
+        os:
+          - Ubuntu
+          - Windows
+        python-version:
+          - 2.7
+          - 3.5
+          - 3.6
+          - 3.7
+          - 3.8
+        pip-version:
+          - "20.0"
+          - "latest"
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install tox
+        run: pip install tox
+      - name: Test pip ${{ matrix.pip-version }}
+        run: tox -e pip${{ matrix.pip-version }}-coverage
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1.0.6
+        with:
+          file: ./coverage.xml
+          name: ${{ matrix.os }}-${{ matrix.python-version }}-${{ matrix.pip-version }}
+
+  pypy:
+    name: Test
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      matrix:
+        os:
+          - Ubuntu
+          # TODO uncomment after test_realistic_complex_sub_dependencies being fixed
+          # - Windpws
+        python-version:
+          - pypy2
+          - pypy3
+        # Test pypy only with the latest pip version to reduce the number of jobs
+        pip-version:
+          - latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install tox
+        run: pip install tox
+      - name: Test pip ${{ matrix.pip-version }}
+        run: tox -e pip${{ matrix.pip-version }}

tests/conftest.py

@@ -16,6 +16,7 @@
 from pytest import fixture
 
 from .constants import MINIMAL_WHEELS_PATH
+from .utils import looks_like_ci
 
 from piptools.cache import DependencyCache
 from piptools.exceptions import NoCandidateFound
@@ -107,7 +108,7 @@ def requires(self):
 def pytest_collection_modifyitems(config, items):
     for item in items:
         # Mark network tests as flaky
-        if item.get_closest_marker("network") and "CI" in os.environ:
+        if item.get_closest_marker("network") and looks_like_ci():
             item.add_marker(pytest.mark.flaky(reruns=3, reruns_delay=2))
 
 

tests/utils.py

@@ -1,3 +1,4 @@
+import os
 import subprocess
 
 
@@ -11,3 +12,11 @@ def invoke(command):
         status = error.returncode
 
     return status, output
+
+
+# NOTE: keep in sync with "passenv" in tox.ini
+CI_VARIABLES = {"CI", "GITHUB_ACTIONS"}
+
+
+def looks_like_ci():
+    return bool(set(os.environ.keys()) & CI_VARIABLES)

tox.ini

@@ -20,12 +20,12 @@ setenv =
     pip20.0: PIP==20.0
     pip20.1: PIP==20.1
 
-    coverage: PYTEST_ADDOPTS=--strict --doctest-modules --cov --cov-report=term-missing {env:PYTEST_ADDOPTS:}
+    coverage: PYTEST_ADDOPTS=--strict --doctest-modules --cov --cov-report=term-missing --cov-report=xml {env:PYTEST_ADDOPTS:}
 commands_pre =
     piplatest: python -m pip install -U pip
     pip --version
 commands = pytest {posargs}
-passenv = CI
+passenv = CI GITHUB_ACTIONS
 pip_pre=True
 
 [testenv:checkqa]