From a1e589498d1b80e3bc8b3e8c5c07874afcf0cb17 Mon Sep 17 00:00:00 2001
From: k0kubun <k0kubun@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 8 Jul 2018 05:52:12 +0000
Subject: [PATCH] tool/git-refresh: skip git fetch and checkout

if the tag is already checked out, to optimize the execution time.

I'm going to prepare a task depending on this tool, and I want that to
finish fast and output nothing when it's already up-to-date.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63883 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 tool/git-refresh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tool/git-refresh b/tool/git-refresh
index d36c4d80bc..9ed7d7c76e 100755
--- a/tool/git-refresh
+++ b/tool/git-refresh
@@ -31,6 +31,9 @@ dir="$2"
 shift 2
 [ x"$branch" = x ] && unset branch || :
 if [ -d "$dir" ]; then
+    if [ x"$(git -C "$dir" describe --tags)" = x"$branch" ]; then
+        exit 0 # already up-to-date
+    fi
     echo updating `expr "/$dir/" : '.*/\([^/][^/]*\)/'` ...
     [ $quiet ] || set -x
     $CHDIR "$dir"