#!/usr/bin/env bash

CPPCHECK_suppresses="--suppress=missingInclude \

--suppress=sprintfOverlappingData:src/http.c \

--suppress=unusedFunction:ebpf/http-parse-sample.c \

--inline-suppr"

CPPCHECK_OPTS="-I. --enable=all --error-exitcode=1 --force $CPPCHECK_suppresses ."

RETURN=0

CLANG_FORMAT=$(which clang-format)

if [ $? -ne 0 ]; then

echo "[!] clang-format not installed. Unable to check source file format policy." >&2

exit 1

fi

CPPCHECK=$(which cppcheck)

if [ $? -ne 0 ]; then

echo "[!] cppcheck not installed. Unable to perform static analysis." >&2

exit 1

fi

ASPELL=$(which aspell)

if [ $? -ne 0 ]; then

echo "[!] aspell not installed. Unable to do spelling check." >&2

exit 1

fi

DIFF=$(which colordiff)

if [ $? -ne 0 ]; then

DIFF=diff

fi

FILES=`git diff --cached --name-only --diff-filter=ACMR | grep -E "\.(c|cpp|h)$"`

for FILE in $FILES; do

nf=`git checkout-index --temp $FILE | cut -f 1`

tempdir=`mktemp -d` || exit 1

newfile=`mktemp ${tempdir}/${nf}.XXXXXX` || exit 1

basename=`basename $FILE`

source="${tempdir}/${basename}"

mv $nf $source

cp .clang-format $tempdir

$CLANG_FORMAT $source > $newfile 2>> /dev/null

$DIFF -u -p -B --label="modified $FILE" --label="expected coding style" \

"${source}" "${newfile}"

r=$?

rm -rf "${tempdir}"

if [ $r != 0 ] ; then

echo "[!] $FILE does not follow the consistent coding style." >&2

RETURN=1

fi

if [ $RETURN -eq 1 ]; then

echo "" >&2

echo "Make sure you indent as the following:" >&2

echo " clang-format -i $FILE" >&2

echo

fi

done

# static analysis

$CPPCHECK $CPPCHECK_OPTS >/dev/null

if [ $? -ne 0 ]; then

RETURN=1

echo "" >&2

echo "Fail to pass static analysis." >&2

echo

fi

exit $RETURN