#!/bin/bash

TOTAL_ERRORS=0
if [[ ! $TRAVIS_BRANCH ]]; then
 # install cpplint on local machine.
 if [[ ! $(which cpplint) ]]; then
pip install cpplint
 fi
 # diff files on local machine. 
 files=$(git diff --cached --name-status | awk '1ドル != "D" {print 2ドル}')
else
 # diff files between PR and latest commit on Travis CI. 
 branch_ref=$(git rev-parse "$TRAVIS_BRANCH")
 head_ref=$(git rev-parse HEAD)
 files=$(git diff --name-status $branch_ref $head_ref | awk '1ドル != "D" {print 2ドル}')
fi
# The trick to remove deleted files: https://stackoverflow.com/a/2413151
for file in $files; do
 if [[ $file =~ ^(patches/.*) ]]; then
 continue;
 else
cpplint --filter=-readability/fn_size,-build/include_what_you_use,-build/c++11 $file;
 TOTAL_ERRORS=$(expr $TOTAL_ERRORS + $?);
 fi
done

exit $TOTAL_ERRORS