#!/bin/sh

set -eu

PRG=$(basename "$0")

showhelp() {
	cat <<EOF
Usage: $PRG PROJECT [GIT_HOST [SSH_CONN]]

Initialize remote git, push local git, and set as default remote.

    PROJECT     basename or relative path for remote git project

    GIT_HOST    hostname for public git access
                default: "source." + current domainname

    SSH_CONN    hostname for ssh, optionally with user prepended
                default: GIT_HOST

Full remote path becomes SSH_USER@SSH_HOST:/srv/git/GIT_HOST/PROJECT.git

Examples:
  $PRG myproject
  $PRG some/subproject git.example.org me@shell.example.org

EOF
}

exit1() {
	echo >&2 "${1:+ERROR: }${1:-Internal error!}"
	exit 1
}

# parse cmdline options
TEMP="`getopt -s sh -o h -l help -n "$PRG" -- "$@"`" || exit1
eval set -- "$TEMP"
while true; do
	case "$1" in
		-h|--help) showhelp; exit;;
		--) shift; break;;
		*) exit1;;
	esac
done

PROJECT=${1-$(showhelp; exit1 "project name missing")}
GIT_HOST=${2:-source.$(dnsdomainname --domain)}
SSH_CONN=${4:+$4@}${3:-$GIT_HOST}

ssh "$SSH_CONN" git init --bare --shared /srv/git/"$GIT_HOST"/"$PROJECT".git
git remote add origin "$SSH_CONN":/srv/git/"$GIT_HOST"/"$PROJECT".git
git push --set-upstream origin master