From b78c68245c05c1fecb3dac8d2fc43172dc92ca4c Mon Sep 17 00:00:00 2001
From: Michael Schlottke-Lakemper <michael@sloede.com>
Date: Mon, 5 Jul 2021 09:22:01 +0200
Subject: [PATCH] Do not run doc preview cleanup from forks

---
 .github/workflows/DocPreviewCleanup.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/DocPreviewCleanup.yml b/.github/workflows/DocPreviewCleanup.yml
index d73330c6f7c..a8f05276b69 100644
--- a/.github/workflows/DocPreviewCleanup.yml
+++ b/.github/workflows/DocPreviewCleanup.yml
@@ -6,6 +6,9 @@ on:
 
 jobs:
   doc-preview-cleanup:
+    # Do not run on forks to avoid authorization errors
+    # Source: https://github.community/t/have-github-action-only-run-on-master-repo-and-not-on-forks/140840/18
+    if: github.repository_owner == 'trixi-framework'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch