From b7a240bbb946aeb5e9662fda550c5ef4192d160c Mon Sep 17 00:00:00 2001
From: Patrick Stevens <3138005+Smaug123@users.noreply.github.com>
Date: Fri, 12 Jul 2024 17:46:04 +0100
Subject: [PATCH] Early out of flake update if there are no changes (#192)

---
 .github/workflows/commit.py         | 2 ++
 .github/workflows/flake_update.yaml | 1 +
 2 files changed, 3 insertions(+)

diff --git a/.github/workflows/commit.py b/.github/workflows/commit.py
index 4489787..045cda0 100755
--- a/.github/workflows/commit.py
+++ b/.github/workflows/commit.py
@@ -122,6 +122,8 @@ def create_pull_request(title: str, branch_name: str, base_branch: str) -> tuple
 
 def main():
     changed_files = get_git_diff()
+    if not changed_files:
+        return
 
     # Create blobs and prepare tree changes
     tree_changes = []
diff --git a/.github/workflows/flake_update.yaml b/.github/workflows/flake_update.yaml
index 90f2ea2..6b0c234 100644
--- a/.github/workflows/flake_update.yaml
+++ b/.github/workflows/flake_update.yaml
@@ -52,6 +52,7 @@ jobs:
         run: /tmp/venv/bin/python .github/workflows/commit.py
 
       - name: Enable Pull Request Automerge
+        if: ${{ steps.cpr.outputs.pull-request-number }}
         uses: peter-evans/enable-pull-request-automerge@v3
         with:
           token: ${{ steps.generate-token.outputs.token }}