X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/ef8deb6d4a729192d7b7818d91530d462e769b7d..b2f03f913282b359d6301c426093b59b04303cff:/.github/workflows/lint.yml

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 90c4801..3eaf578 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -14,7 +14,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+
+      - 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 latest Python
         uses: actions/setup-python@v4