#!/bin/bash

# upgpkg: Upgrades package versions in PKGBUILD and starts build.
# Author: Abhishek Dasgupta <abhidg@gmail.com>
#         Thanks to cactus, profjim and daenyth for all the sed help!
# Requires: pkgtools.

# I place this script in the public domain.

MYVERSION=0.1
PROGNAME="upgpkg"

if [ -r /usr/share/pkgtools/functions ]; then
        source /usr/share/pkgtools/functions
else
        printf "$(gettext "upgpkg: Unable to source function file!\n")" >&2
        exit 1
fi

die() {
    local message="$1"
    shift
    printf "$message" "$@"
    exit 1
}

if [ -r /etc/pkgtools/newpkg.conf ]; then
        source /etc/pkgtools/newpkg.conf
fi
if [ -r "${HOME}/.pkgtools/newpkg.conf" ]; then
        source "${HOME}/.pkgtools/newpkg.conf"
fi

if [ -z "$BASEDIR" ]; then die "$(gettext "upgpkg: unable to locate BASEDIR in configuration.")"; fi

if [ -z "$1" ]; then printf "upgpkg %s\n" "$MYVERSION"; printf "$(gettext "usage: upgpkg package-name newver\n")"; exit; fi

if [ ! -d "$BASEDIR/$1" ]; then die "$(gettext "upgpkg: package %s not in %s.\n")" "$1" "$BASEDIR"; fi
if [ -z "$2" ]; then die "$(gettext "upgpkg: no new version specified for %s\n")" "$1"; fi

# Main code follows

cd "$BASEDIR/$1"
sed -ri '/md5sums[ ]?\=/{:a; /\)/d; N; ba;}' PKGBUILD || die "upgpkg: could not bump pkgver of $1\n"
source PKGBUILD

if [ $(vercmp $2 $pkgver) -gt 0 ]; then
    sed -i "s/pkgver=.*$/pkgver=$2/g" PKGBUILD
    sed -i "s/pkgrel=.*$/pkgrel=1/g" PKGBUILD
    makepkg -g >> PKGBUILD
else
    die "$(gettext "upgpkg: %s - new version (%s) older or equal to current %s\n")" "$1" "$2" "$pkgver"
fi
makepkg -m
if [ $? -gt 0 ]; then
    sed -i "s/pkgver=.*$/pkgver=$pkgver/g" PKGBUILD
    sed -i "s/pkgrel=.*$/pkgrel=$pkgrel/g" PKGBUILD
    die "$(gettext "upgpkg: %s - build failed for %s, reverting to %s\n")" "$1" "$2" "$pkgver"
fi