#!/bin/sh

LANG=C; export LANG

PROGNAME=${0##*/}
BASEDIR=~git

err ()
{
	echo "$PROGNAME: $@" 1>&2
	exit 1
}

usage ()
{
	echo "Usage: $PROGNAME REPOS"
	exit 1
}

while getopts 'hm:' ch; do
	case $ch in
	m)	description=$OPTARG;;
	h)	usage;;
	\?)	exit 1;;
	esac
done

if [ -n "$1" ]; then
	case "$1" in
	*[./]*)
		err "Invalid repository name";;
	esac
	GIT_DIR="$BASEDIR/$1.git"
else
	if [ -z "$GIT_DIR" ]; then
		err "Missing GIT_DIR"
	fi
fi

if [ -d "$GIT_DIR" ]; then
	err "$GIT_DIR already exists"
fi

if [ -z "$description" ]; then
	description="Git repository ${GIT_DIR##*/} created by $PROGNAME at `date`"
fi

set -e
export GIT_DIR
git init --bare --shared=group
echo "$description" > "$GIT_DIR/description"