From 37542e64855ce21bd580f973ae5ce1ed86812a7a Mon Sep 17 00:00:00 2001
From: Richard Si <63936253+ichard26@users.noreply.github.com>
Date: Sat, 31 Dec 2022 01:52:35 -0500
Subject: [PATCH] Fail lint CI if the PR doesn't target main (#3477)

Let's skip the check if we're running on a fork just in case someone
opens a PR against a branch on said fork as part of a PR review
upstream.
---
 .github/workflows/lint.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 90c4801..064d474 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -16,6 +16,13 @@ jobs:
     steps:
       - 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 latest Python
         uses: actions/setup-python@v4
         with:
-- 
2.39.5