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#!/bin/bash
# Generates a patch for a nonfree PKGBUILD
#
# Copyright 2010 Nicolás Reynolds

# ---------- GNU General Public License 3 ----------

# 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/>.

usage() {
    echo "Usage: $0 <pkgname> [<pkgname2> ...]"
    echo "Requirements:"
    echo "* Have a <pkgname>/ directory with nonfree build scripts inside"
    echo "* Have a <pkgname>-libre/ directory with libre build scripts inside"
}

# Load custom config or system-wide config
custom_config=$XDG_CONFIG_HOME/libretools/libretools.conf
if [ -e $custom_config ]; then
    source $custom_config
else
    source /etc/libretools.conf
fi

# Print usage if no package has been given
[[ -z "$@" ]] && {
    usage
    exit 1
}


for package in $@; do
# Continue on errors
    [[ ! -d ./${package} || ! -d ./${package}-libre ]] && {
        error "no matching ${package} and ${package}-libre found"
        continue
    }

    [[ ! -f ./${package}/PKGBUILD || ! -f ./${package}-libre/PKGBUILD ]] && {
        error "no matching PKGBUILDs found for ${package}-libre"
        continue
    }

    source ./${package}-libre/PKGBUILD
    [[ -z ${pkgbase} ]] && pkgbase=${pkgname}

# Generate a diff file, no -r since we don't want to patch src/ nor pkg/
    diff -auN ${package} ${package}-libre > $PATCHDIR/${pkgbase}-${pkgver}-${pkgrel}.patch

done

exit 0