#!/bin/sh

clean() {
    rm -rf ${1}.fi ${1}.fo ${1}.lift ${1}.map ${1}.opts
}
git_export() {
    (cd ${1}-mirror ; repotool export) >${2}.git
}

git_mirror() {
    repotool mirror ${1} ${2}-mirror
}

prepare() {
    touch ${1}.opts
    touch ${1}.map
    touch ${1}.lift
}

svn_import() {
    reposurgeon "script ${2}.opts" \
		"read <${2}.git" \
		"authors read <${2}.map" \
		"sourcetype git" \
		"prefer git" \
		"script ${2}.lift" \
		"legacy write >${2}.fo" \
		"write >${2}.fi"

    reposurgeon "read <${2}.fi" \
		"prefer svn" \
		"rebuild ${repo_name}-svn"
    
}

print_usage() {
    printf "usage: %s [export dir file] [mirror url repo_name] [migrate repo_name]\n" "$0"
    printf "this program requires reposurgeon 3.41\n"
    exit 1
}

case $1 in
    export)
	git_export $2 $3
	;;
    mirror)
	git_mirror $2 $3
	;;
    migrate)
	prepare $2
	svn_import $2
	clean $2
	;;
    *)
	print_usage
	;;
esac