From ffa7b69ef8db23665f8c6062c5767c3fbe96f3cc Mon Sep 17 00:00:00 2001
From: Brendon Smith <bws@bws.bio>
Date: Thu, 30 May 2024 21:34:34 -0400
Subject: [PATCH] Checkout `github.head_ref` for PRs

https://github.com/actions/checkout/issues/27#issuecomment-535897113
https://github.com/actions/checkout/issues/1108
---
 action.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/action.yml b/action.yml
index bda69be..3e24d9e 100644
--- a/action.yml
+++ b/action.yml
@@ -104,7 +104,7 @@ runs:
       # Set repo and ref from which to run Docker container action
       # to handle cases in which `github.action_` context is not set
       # https://github.com/actions/runner/issues/2473
-      REF=${{ env.ACTION_REF || github.ref_name }}
+      REF=${{ env.ACTION_REF || github.head_ref || github.ref_name }}
       REPO=${{ env.ACTION_REPO || github.repository }}
       echo "ref=$REF" >>"$GITHUB_OUTPUT"
       echo "repo=$REPO" >>"$GITHUB_OUTPUT"