https://git.ruby-lang.org/ruby.git/commit/?id=789f17665e

From 789f17665e87ddfe76ef2f7bf344163d7cbf98cf Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Fri, 16 Aug 2019 01:18:26 +0900
Subject: Make `make update-github` idempotent


diff --git a/defs/gmake.mk b/defs/gmake.mk
index 2b4716b..981cb77 100644
--- a/defs/gmake.mk
+++ b/defs/gmake.mk
@@ -199,7 +199,7 @@ update-github: checkout-github https://github.com/ruby/ruby/blob/trunk/defs/gmake.mk#L199
 	$(eval FORK_REPO := $(shell echo $(PULL_REQUEST_FORK_BRANCH) | cut -d' ' -f1))
 	$(eval PR_BRANCH := $(shell echo $(PULL_REQUEST_FORK_BRANCH) | cut -d' ' -f2))
 	git merge master --no-edit
-	git remote add fork-$(PR) git@g...:$(FORK_REPO).git
+	git remote get-url fork-$(PR) || git remote add fork-$(PR) git@g...:$(FORK_REPO).git
 	git push fork-$(PR) gh-$(PR):$(PR_BRANCH)
 	git remote rm fork-$(PR)
 
-- 
cgit v0.10.2


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