From b4e97a207fd0c43e99cfb1b356f5b27c1cd47e21 Mon Sep 17 00:00:00 2001
From: Miki <amoo_miki@yahoo.com>
Date: Wed, 2 Nov 2022 16:24:38 -0700
Subject: [PATCH] Prevent backport workflow from running on umerged PRs

Signed-off-by: Miki <amoo_miki@yahoo.com>
---
 .github/workflows/backport.yml | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/.github/workflows/backport.yml b/.github/workflows/backport.yml
index 1d05b416930..cb2e3c3049c 100644
--- a/.github/workflows/backport.yml
+++ b/.github/workflows/backport.yml
@@ -12,6 +12,17 @@ jobs:
       contents: write
       pull-requests: write
     name: Backport
+    # Only react to merged PRs for security reasons.
+    # See https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target.
+    if: >
+      github.event.pull_request.merged
+      && (
+        github.event.action == 'closed'
+        || (
+          github.event.action == 'labeled'
+          && contains(github.event.label.name, 'backport')
+        )
+      )
     steps:
       - name: GitHub App token
         id: github_app_token