#!/usr/bin/env bash
# Copyright (C) 2011-2012 Nicolás Reynolds <fauno@parabola.nu>
# Copyright (C) 2011-2012 Joshua Ismael Haase Hernández (xihh) <hahj87@gmail.com>
# Copyright (C) 2013 Luke Shumaker <lukeshu@sbcglobal.net>
#
# License: GNU GPLv3+
#
# This file is part of Parabola.
#
# Parabola is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Parabola 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Parabola. If not, see <http://www.gnu.org/licenses/>.

. libremessages

usage() {
	print "Usage: %s [-h] PKGNAME [PKGVER]" "${0##*/}" "${0##*/}"
	print 'Detect iv a given package (version) is already in the repos'
	echo
	prose "If a version is specified, it assumed that you want a greater or
	       equal version."
	echo
	prose "Example usage:"
	print "  $ %s 'pcre' '20'" "${0##*/}"
	echo
	print "Exit status:"
	print "  0: The package is built"
	print "  1: The package has not built"
	print " >1: There was an error"
}

while getopts 'h' arg; do
	case $arg in
		h) usage; exit 0 ;;
		*) usage >&2; exit 2 ;;
	esac
done
if [[ $# -ne 1 ]] && [[ $# -ne 2 ]]; then
	usage >&2
	exit 2
fi

pkg=${1}
ver=${2:-0}
pver=$(LC_ALL=C pacman -Sddp --print-format '%v' "${pkg}" 2>/dev/null)

# if pacman fails or returns nothing
r=$?

result=$(vercmp "${pver}" "${ver}")
# result:
# -1 : pver < ver
#  0 : pver = ver
#  1 : pver > ver

if [[ $result -ge 0 ]] && [[ $r -eq 0 ]]; then
	exit 0
else
	exit 1
fi