From 777fcfc04e3c63b6e78c6b51ef6656134649f696 Mon Sep 17 00:00:00 2001
From: Xiang Dai <764524258@qq.com>
Date: Tue, 20 Aug 2019 22:08:49 +0800
Subject: [PATCH] optimize image tag script (#911)

* add quota for sed

Signed-off-by: Xiang Dai <764524258@qq.com>

* add comment for head

Signed-off-by: Xiang Dai <764524258@qq.com>
---
 tools/image-tag | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/image-tag b/tools/image-tag
index cfa0aae7..406b0740 100755
--- a/tools/image-tag
+++ b/tools/image-tag
@@ -5,7 +5,9 @@ set -o nounset
 set -o pipefail
 
 WIP=$(git diff --quiet || echo '-WIP')
-BRANCH=$(git rev-parse --abbrev-ref HEAD | sed s#/#-#g)
+BRANCH=$(git rev-parse --abbrev-ref HEAD | sed 's#/#-#g')
+# When 7 chars are not enough to be unique, git automatically uses more.
+# We are forcing to 7 here, as we are doing for grafana/grafana as well.
 SHA=$(git rev-parse --short=7 HEAD | head -c7)
 
 # If this is a tag, use it,                      otherwise branch-hash
-- 
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