From ee661b4256feab2660b5f2036d454d9851a99673 Mon Sep 17 00:00:00 2001
From: Akira Komamura <akira.komamura@gmail.com>
Date: Sun, 24 Sep 2023 12:50:29 +0900
Subject: [PATCH] Detach the head to workaround create-pull-request action

---
 .github/workflows/merge-upstream.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/merge-upstream.yml b/.github/workflows/merge-upstream.yml
index aed5bdaf6e5..f593b4179a4 100644
--- a/.github/workflows/merge-upstream.yml
+++ b/.github/workflows/merge-upstream.yml
@@ -37,6 +37,12 @@ jobs:
         git config --add user.email '6270544+github-actions[bot]@users.noreply.github.com'
         nix run .#update-recipes --no-write-lock-file -- upstream/master
 
+    # A workaround to prevent peter-evans/create-pull-request from resetting the
+    # head here:
+    # <https://github.com/peter-evans/create-pull-request/blob/d806186ee3288c60a352af9852b6b18afbbfd87e/src/create-or-update-branch.ts#L178>
+    - name: Detach the head
+      run: git switch --detach `git rev-parse HEAD`
+
     - name: Create a pull request
       uses: peter-evans/create-pull-request@v5
       with: