#!/bin/bash
# Copyright © 2014 Luke Shumaker <lukeshu@sbcglobal.net>
# This work is free. You can redistribute it and/or modify it under the
# terms of the Do What The Fuck You Want To Public License, Version 2,
# as published by Sam Hocevar. See the COPYING file for more details.

# Depends on the 'gitget' and 'libremessages' commands.  On Parabola
# GNU/Linux-libre, those are the 'gitget' and 'librelib' packages,
# respectively.
#
# For other systems, the both live at:
#     https://projects.parabolagnulinux.org/packages/libretools.git/

set -o pipefail
set -e
. libremessages

config-get() {
	[[ $# == 1 ]] || panic
	git config --file "$conf_file" --get "$1"
}

list-repos() {
	[[ $# == 0 ]] || panic
	git config --file "$conf_file" --list | cut -s -d. -f2 | sort -u
}

mirror-repo() {
	[[ $# == 1 ]] || panic
	repo=$1
	canonical_path="$(config-get "repo.${repo}.canonical")"
	local_path="$(config-get "repo.${repo}.local")"
	description="$(config-get "repo.${repo}.description")"
	[[ -n $description ]] || description="mirror of ${canonical_path}"

	gitget -f -n "$repo" bare "$canonical_path" "$local_path"
	printf '%s\n' "$description" > "$local_path/description.tmp" 
	mv -- "$local_path/description.tmp" "$local_path/description" 
}

usage() {
	print 'Usage %s CONFIG-FILE' "${0##*/}"
}

main() {
	if [[ $# != 1 ]]; then
		usage
		exit
	fi
	declare -g conf_file="$1"
	while read -r repo; do mirror-repo "$repo"; done < <(list-repos)
}

main "$@"