dist/tools/cppcheck: use changed_files.sh

dist/tools/cppcheck/check.sh

@@ -1,5 +1,6 @@
 #!/bin/sh
 
+# Copyright 2017 Kaspar Schleiser <kaspar@schleiser.de>
 # Copyright 2014 Ludwig Knüpfer <ludwig.knuepfer@fu-berlin.de>
 # Copyright 2014 Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de>
 #
@@ -7,6 +8,8 @@
 # General Public License v2.1. See the file LICENSE in the top level
 # directory for more details.
 
+. ${RIOTBASE:+${RIOTBASE}/}dist/tools/ci/changed_files.sh
+
 # Don't show warnings about unusedStructMembers by default
 DEFAULT_SUPPRESSIONS="${1}"
 if echo "${DEFAULT_SUPPRESSIONS}" | grep -q '^--show-unused-struct'; then
@@ -16,38 +19,7 @@ else
     DEFAULT_SUPPRESSIONS=--suppress="unusedStructMember"
 fi
 
-BRANCH=${1}
-FILEREGEX='\.([CcHh]|[ch]pp)$'
-EXCLUDE='^(.+/include/vendor/)'
-
-# If no branch but an option is given, unset BRANCH.
-# Otherwise, consume this parameter.
-if echo "${BRANCH}" | grep -q '^-'; then
-    BRANCH=""
-else
-    if [ -n "${BRANCH}" ]; then
-        shift 1
-    fi
-fi
-
-# If the --diff-filter option is given, consume this parameter.
-# Set the default DIFFFILTER option otherwise.
-DIFFFILTER="${1}"
-if echo "${DIFFFILTER}" | grep -q '^--diff-filter='; then
-    shift 1
-else
-    DIFFFILTER="--diff-filter=ACMR"
-fi
-
-# select either all or only touched-in-branch files, filter through FILEREGEX
-if [ -z "${BRANCH}" ]; then
-    FILES="$(git ls-tree -r --full-tree --name-only HEAD | grep -E ${FILEREGEX})"
-else
-    FILES="$(git diff ${DIFFFILTER} --name-only ${BRANCH} | grep -E ${FILEREGEX})"
-fi
-
-# filter out negatives
-FILES=$(echo "${FILES}" | grep -v -E ${EXCLUDE})
+FILES=$(changed_files)
 
 if [ -z "${FILES}" ]; then
     exit