#!/bin/sh
branches=
ref=
while [ -n "$1" -a -z "${1%%-*}" ]; do
	opt="$1"; shift;
	case "$opt" in
		-b) branches=1;;
		-r) ref="$1"; shift;;
	esac
done

[ "$#" -eq 3 ] || {
	echo "Usage: $0 [-b] [-r <reference>] <giturl> <svnurl> <target>"
}

r() {
	local cmd="$1"; shift
	$cmd "$@" || exit "$?"
}

r git clone ${ref:+--reference "$ref"} "$1" "$3" $GSC_GIT_OPTIONS
r cd "$3"

REPO="$(git log | grep git-svn-id | head -n1 | awk '{print $2}' | cut -d@ -f1)"
dir="${2##*/}"
url="${2%%/}"
[ trunk = "$dir" ] && {
	opts="-T trunk"
	url="${url%%/trunk}"
	REPO="${REPO%%/trunk}"
}
[ -n "$branches" ] && opts="-T trunk -t tags -b branches"
[ "$REPO" = "$url" ] && REPO=

r git config --add remote.origin.fetch '+refs/remotes/*:refs/remotes/*'
r git fetch origin
r git svn init "$url" $opts ${REPO:+--rewrite-root "$REPO"}
r git svn rebase