#!/bin/bash
#
# fd-commit - part of the F-Droid server tools
# Commits updates to apps, allowing you to edit the commit messages
#
# Copyright (C) 2013-2014 Daniel Marti <mvdan@mvdan.cc>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

commands=()

if [ ! -d metadata ]; then
	if [ -d ../metadata ]; then
		cd ..
	else
		echo "No metadata files found!"
		exit 2
	fi
fi

while read line; do

	case "$line" in
		*'??'*'metadata/'*'.txt') new=true ;;
		*'M'*'metadata/'*'.txt') new=false ;;
		*) continue ;;
	esac

	file=${line##* }
	id=${file##*/}
	id=${id%.txt*}

	if [ $# -gt 0 ]; then
		case "$@" in
			*" $id "*) ;;  # Middle
			"$id "*) ;;    # Start
			*" $id") ;;    # End
			"$id") ;;      # Alone
			*) continue ;; # Missing
		esac
	fi

	[ -d metadata/$id ] && extra=metadata/$id || extra=

	name= autoname=
	while read l; do
		case "$l" in
			'Auto Name:'*) autoname=${l#*:} ;;
			'Name:'*) name=${l#*:} ;;
			'Summary:'*) break ;;
		esac
	done < "$file"

	if [ -n "$name" ]; then
		fullname="$name"
	elif [ -n "$autoname" ]; then
		fullname="$autoname"
	else
		fullname="$id"
	fi

	if $new; then
		message="New app: $fullname"
	else
		onlybuild=true
		newbuild=false
		disable=false
		while read line; do
			case "$line" in
				'-Build:'*) onlybuild=false ;;
				'+Build:'*)
					$newbuild && onlybuild=false
					newbuild=true
					build=${line#*:}
					version=${build%%,*}
					build=${build#*,}
					vercode=${build%%,*}
					;;
				'+'*'disable='*)
					$newbuild && $onlybuild && disable=true
					;;
			esac
		done < <(git diff HEAD -- "$file")

		if $newbuild && $onlybuild; then
			if $disable; then
				message="Don't update $fullname to $version ($vercode)"
			else
				message="Update $fullname to $version ($vercode)"
			fi
		else
			message="$fullname:"
		fi
	fi

	message=${message//\"/\\\"}
	commands+=("git add -- $file $extra && git commit -m \"$message\" -e -v")

done < <(git status --porcelain metadata)

[ -z "$commands" ] && exit 0

git reset >/dev/null
for cmd in "${commands[@]}"; do
	eval "$cmd"
	git reset >/dev/null
done