From a3c7f3213b7c9b38355c204e35683c97ba9b77b9 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Tue, 22 Jan 2019 10:15:36 +0100
Subject: [PATCH] fix docker commit tag [ci skip]

use the first 8 chars of the commit, not the last
---
 hooks/post_push | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hooks/post_push b/hooks/post_push
index e31e0429..3f7f7a9e 100644
--- a/hooks/post_push
+++ b/hooks/post_push
@@ -2,6 +2,6 @@
 
 # when building jupyter/repo2docker:master also push jupyter/repo2docker:abcd1234
 
-HASH_IMAGE="$DOCKER_REPO:${SOURCE_COMMIT: -8}"
+HASH_IMAGE="$DOCKER_REPO:${SOURCE_COMMIT:0:8}"
 docker tag $DOCKER_REPO:$DOCKER_TAG $HASH_IMAGE
 docker push $HASH_IMAGE