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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 ]] && {
        echo "Error: no matching ${package} and ${package}-libre found"
        continue
    }

    [[ ! -f ./${package}/PKGBUILD || ! -f ./${package}-libre/PKGBUILD ]] && {
        echo "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 -au ./${package} ./${package}-libre >> $PATCHDIR/${pkgbase}-${pkgver}-${pkgrel}.patch

done

exit 0