From 08d8b2da3877f87765bca69c9c27cd864ac507c8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Lefaure?= <jeremy@lefaure.fr>
Date: Sun, 1 May 2016 14:52:03 +0200
Subject: [PATCH] git-pre-commit-cppcheck: check only added or modified source
 files

The regexp is written according to git-diff-index manual.
---
 tools/git-pre-commit-cppcheck | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/git-pre-commit-cppcheck b/tools/git-pre-commit-cppcheck
index f944f072f..4a542d207 100644
--- a/tools/git-pre-commit-cppcheck
+++ b/tools/git-pre-commit-cppcheck
@@ -36,11 +36,11 @@ else
 	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
 fi
 
-# We should not pass non-C/C++ files to cppcheck. Filter filenames with pattern.
-pattern='\.(c|cpp|cc|cxx|h|hpp)$'
-changed_files=$(git diff-index --cached --name-only $against | grep -E $pattern)
+# We should pass only added or modified C/C++ source files to cppcheck.
+changed_files=$(git diff-index --cached $against | \
+	grep -E '[MA]	.*\.(c|cpp|cc|cxx)$' | cut -d'	' -f 2)
 
 if [ -n "$changed_files" ]; then
-    cppcheck --error-exitcode=1 $changed_files
-    exit $?
+	cppcheck --error-exitcode=1 $changed_files
+	exit $?
 fi