From 97b403ebe726a4f2e70c8399a30cc90bbf4ddca6 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Halimi <jeanphilippe.halimi@gmail.com>
Date: Wed, 2 Nov 2016 16:41:43 -0700
Subject: [PATCH] Check clang-format during pre-commit

Users who do not have clang-format installed were not able to push commits. This patch gives
better feedback to the developer by explicitely telling the user to install the package.
---
 hooks/pre-commit | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hooks/pre-commit b/hooks/pre-commit
index 04fdaf8ec..541f5a3bc 100755
--- a/hooks/pre-commit
+++ b/hooks/pre-commit
@@ -25,6 +25,13 @@ END
     exit 1
 fi
 
+if ! hash "clang-format" 2> /dev/null; then
+    cat<<END
+Error: You must have clang-format installed on your system for codestyle checking purposes.
+END
+    exit 1
+fi
+
 for f in $(git diff --name-only --diff-filter=ACMRTUXB --cached); do
     if ! echo "$f" | egrep -q "[.](cpp|h)$"; then
         continue