set -eEo pipefail
-CLANG_FORMAT_VER=10
+CLANG_FORMAT_VER_REGEX='([0-9]+)\.[0-9]+\.[0-9]+'
+CLANG_FORMAT_DIFF="/usr/share/clang/clang-format-diff.py"
+
+# TODO: Remove clang-format-${CLANG_FORMAT_VER} from 'make install-deps' when
+# CLANG_FORMAT_VER default value is upgraded
+CLANG_FORMAT_VER=${CLANG_FORMAT_VER:-10}
GIT_DIFF_ARGS="-U0 --no-color --relative HEAD~1"
CLANG_FORMAT_DIFF_ARGS="-style file -p1"
SUFFIX="-${CLANG_FORMAT_VER}"
-clang-format${SUFFIX} --version
+# Attempt to find clang-format to confirm Clang version.
+if command -v clang-format${SUFFIX} &> /dev/null;
+then
+ CLANG_FORMAT=clang-format${SUFFIX}
+elif command -v clang-format &> /dev/null;
+then
+ CLANG_FORMAT=clang-format
+fi
+
+CLANG_FORMAT_VERSION=$(${CLANG_FORMAT} --version)
+echo $CLANG_FORMAT_VERSION
+
+# Confirm that Clang is the expected version.
+if [[ ! $CLANG_FORMAT_VERSION =~ $CLANG_FORMAT_VER_REGEX ]];
+then
+ echo "*******************************************************************"
+ echo "* CHECKSTYLE VERSION REGEX CHECK FAILED"
+ echo "* $CLANG_FORMAT_VERSION"
+ echo "*******************************************************************"
+ exit 1
+fi
+
+if [[ ! $CLANG_FORMAT_VER == "${BASH_REMATCH[1]}" ]];
+then
+ echo "*******************************************************************"
+ echo "* CHECKSTYLE VERSION CHECK FAILED"
+ echo "* Expected major version $CLANG_FORMAT_VER, found ${BASH_REMATCH[1]}"
+ echo "*******************************************************************"
+ exit 1
+fi
+
+# Attempt to find clang-format-diff.
+if command -v clang-format-diff${SUFFIX} &> /dev/null;
+then
+ CLANG_FORMAT_DIFF=clang-format-diff${SUFFIX}
+elif command -v clang-format-diff &> /dev/null;
+then
+ CLANG_FORMAT=clang-format-diff
+elif [ ! -f $CLANG_FORMAT_DIFF ] ;
+then
+ echo "*******************************************************************"
+ echo "* CHECKSTYLE FAILED"
+ echo "* Could not locate the clang-format-diff script"
+ echo "*******************************************************************"
+ exit 1
+fi
in=$(mktemp)
git diff ${GIT_DIFF_ARGS} ':!*.patch' > ${in}
fi
if [ "${1}" == "--fix" ]; then
- cat ${in} | clang-format-diff${SUFFIX} ${CLANG_FORMAT_DIFF_ARGS} -i
+ cat ${in} | ${CLANG_FORMAT_DIFF} ${CLANG_FORMAT_DIFF_ARGS} -i
filelist=$(sed -n 's/^+++ b\/\(.*\.[ch]\)/\1/p' ${in})
git status ${filelist}
rm ${in}
out=$(mktemp)
-cat ${in} | clang-format-diff${SUFFIX} ${CLANG_FORMAT_DIFF_ARGS} > ${out}
+cat ${in} | ${CLANG_FORMAT_DIFF} ${CLANG_FORMAT_DIFF_ARGS} > ${out}
rm ${in}
line_count=$(cat ${out} | wc -l)