Git pre-commit hook for versioning

pre-commit

#!/usr/bin/zsh

VERFILE=lib/Data.pm

if (git diff --cached --diff-filter=M --unified=0 $VERFILE|grep VERSION 1>/dev/null)
then
    exit 0
else
    cat <<\EOF

WARNING: Version of the project has not been updated.
This project is using Semantic Versioning.
Information about versioning you can found at http://semver.org/
EOF
    exit 1
fi