#!/bin/bash
#
# fd-commit - part of the FDroid server tools
# Commits updates to apps, allowing you to edit the commit messages
#
# Copyright (C) 2013-2014 Daniel Martí <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
	if [[ "$line" == *\?\?*metadata/*.txt ]]; then
		new=true
	elif [[ "$line" == *M*metadata/*.txt ]]; then
		new=false
	fi
	file=${line##* }

	id=${file##*/}
	id=${id%.txt*}
	if [ $# -gt 0 ]; then
		found=false
		for arg in "$@"; do
			if [ "$id" == "$arg" ]; then
				found=true
				break
			fi
		done
		$found || continue
	fi

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

	name= autoname=
	while read l; do
		if [[ "$l" == "Auto Name:"* ]]; then
			autoname=${l#*:}
		elif [[ "$l" == "Name:"* ]]; then
			name=${l#*:}
		fi
	done < "$file"

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

	if $new; then
		message="New app: $fullname"
	else
		onlybuild=true
		newbuild=false
		disable=false
		while read l; do
			if [[ "$l" == *"Maintainer Notes:"* ]]; then
				break
			fi
			if [[ "$l" == "-Build:"* ]]; then
				onlybuild=false
			elif [[ "$l" == "+Build:"* ]]; then
				if $newbuild; then
					onlybuild=false
				fi
				newbuild=true
				build=${l#*:}
				version=${build%%,*}
				build=${build#*,}
				vercode=${build%%,*}
			elif $newbuild && $onlybuild && [[ "$l" == "+"*"disable="* ]]; then
				disable=true
			fi
		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