From ca5f8f97bb80d4cdeaee584b7e9ba0c83207a2b2 Mon Sep 17 00:00:00 2001
From: Germain Souquet <germain@souquet.com>
Date: Mon, 21 Jun 2021 16:18:13 +0100
Subject: [PATCH] Branch matching support for forked repository on GitHub
 actions

---
 scripts/fetchdep.sh | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/scripts/fetchdep.sh b/scripts/fetchdep.sh
index 9844fdc9db..02af402951 100755
--- a/scripts/fetchdep.sh
+++ b/scripts/fetchdep.sh
@@ -36,13 +36,19 @@ else
 	head=$(curl $apiEndpoint | jq -r '.head.label')
 fi
 
-# If head is set, it will contain either:
+# If head is set, it will contain on BuilKite either:
 #   * "branch" when the author's branch and target branch are in the same repo
 #   * "fork:branch" when the author's branch is in their fork or if this is a Netlify build
 # We can split on `:` into an array to check.
+# For GitHub Actions we need to inspect GITHUB_REPOSITORY and GITHUB_ACTOR
+# to determine whether the branch is from a fork or not
 BRANCH_ARRAY=(${head//:/ })
 if [[ "${#BRANCH_ARRAY[@]}" == "1" ]]; then
-    clone $deforg $defrepo $head
+    if [[ "$GITHUB_REPOSITORY" = "$deforg/$defrepo" ]]; then
+        clone $deforg $defrepo $head
+    else
+        clone $GITHUB_ACTOR $defrepo $head
+    fi
 elif [[ "${#BRANCH_ARRAY[@]}" == "2" ]]; then
     clone ${BRANCH_ARRAY[0]} $defrepo ${BRANCH_ARRAY[1]}
 fi