pre-commit

#!/bin/sh
set -eu

PROGNAME="${0}"

usage()
{
	echo "Usage: ${PROGNAME} [--install]"
	echo
	echo "  --install     Install the pre-commit hook"
	echo "  -h, --help    Display this help and exit"
	echo
	echo "Without any options the pre-commit checks are run."
}

if [ $# -gt 0 ];
then
	case "${1}" in
		"--install")
			top_dir="$(git rev-parse --show-toplevel)"
			git_dir="$(git rev-parse --git-dir)"
			
			if [ -f "${git_dir}/hooks/pre-commit" ];
			then
				echo "ERROR: found existing pre-commit hook; " \
				     "cowardly giving up." >&2
				exit 1
			fi
			
			echo " • Installing pre-commit hook to ${git_dir}/hooks"
			ln -s "${top_dir}/tools/pre-commit" "${git_dir}/hooks/pre-commit"

			echo " • Enabling GIT hook Unicode support"
			git config --local --type=bool hooks.allownonascii true
			exit
		;;

		"-h"|"--help")
			usage
			exit 0
		;;

		*)
			echo "${PROGNAME}: Unknown option “${1}”" >&2
			echo >&2
			usage >&2
			exit 2
		;;
	esac
fi

# Run code style and type tests before accepting a commit
tox -e styleck -e typeck