Fail lint CI if the PR doesn't target main (#3477)

[etc/vim.git] / .github / workflows / lint.yml

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 58ce406b1c8d497f818e0d56647f40217fb58d81..064d4745a53c1d2125a27205ab88839368db2788 100644 (file)
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -4,24 +4,39 @@ on: [push, pull_request]
 
 jobs:
   build:
+    # We want to run on external PRs, but not on our own internal PRs as they'll be run
+    # by the push to the branch. Without this if check, checks are duplicated since
+    # internal PRs match both the push and pull_request events.
+    if:
+      github.event_name == 'push' || github.event.pull_request.head.repo.full_name !=
+      github.repository
+
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: [3.7]
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
+
+      - name: Assert PR target is main
+        if: github.event_name == 'pull_request' && github.repository == 'psf/black'
+        run: |
+          if [ "$GITHUB_BASE_REF" != "main" ]; then
+              echo "::error::PR targeting '$GITHUB_BASE_REF', please refile targeting 'main'." && exit 1
+          fi
 
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v1
+      - name: Set up latest Python
+        uses: actions/setup-python@v4
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: "*"
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install --upgrade pre-commit
           python -m pip install -e '.[d]'
+          python -m pip install tox
 
-      - name: Lint
-        run: pre-commit run --all-files
+      - name: Run pre-commit hooks
+        uses: pre-commit/action@v3.0.0
+
+      - name: Format ourselves
+        run: |
+          tox -e run_self