Rubocop check only files that are changed

check_rubocop

# Needs showlinennum in ~/bin folder of user, change it to some more general
# solution if you have showlinenum in path

if [ "$1" == "" ];then
  rev="HEAD"
else
  rev="$1"
fi

if [ -e ~/bin/showlinenum.awk ]; then
  git diff $rev --diff-filter=ACM --name-only | while read file;do rubocop $file | awk "/$(echo "$(echo $file | tr "/" '.'):("$((git diff -U0 HEAD $file | ~/bin/showlinenum.awk | awk -F':' '/^[0-9]+:/ {print $1}' | tr '\n' '|') | rev | cut -c 2- | rev)")")/ {print}";done | grep -v " C:"
else
  echo "~/bin/showlinenum.awk does not exist. Install it from https://github.com/jay/showlinenum"
fi

It is already bash script, bashrc is for configuration, not whole scripts...