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#! /bin/bash
#   pbuilder-internal -- personal Debian package builder, internal routine
#   Copyright (C) 2003-2007 Junichi Uekawa
#
#   This program 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 2 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 General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
#
# invoke this as 
#  pbuilder execute pdebuild-internal --bindmount "${pwd}/.." "$1"
# does not support --buildresult, but should that be required ?
#
# Risk: May corrupt your files depending on how user-mode-linux works, if used inside UML.
# Will take longer if your package does not successfully run 'debian/rules clean'
# 

# This script is running inside chroot under 'pbuilder execute' as root.

set -e

# I am probably running as root; make sure I have pbuilder installed here.
# passwd is needed as well because of useradd and groupadd calls.
apt-get install -y --force-yes pbuilder passwd

# I'm not going to have the same LOGNAME as outside, I'm root.
export LOGNAME=root

cd "$1"
shift;

while [ -n "$1" ]; do 
    case "$1" in 
	--debbuildopts)
	    echo "Setting DEBBUILDOPTS=$2"
	    DEBBUILDOPTS="$2"
	    shift; shift;
	    ;;
	--uid)
	    BUILDRESULTUID=$2
	    shift; shift;
	    ;;
	--gid)
	    BUILDRESULTGID=$2
	    shift; shift;
	    ;;
	--pbuildersatisfydepends)
	    PBUILDERSATISFYDEPENDSCMD=$2
	    shift; shift;
	    ;;
	--debug)
	    PBUILDER_DEBUGMODE=yes
	    set -x
	    shift;
	    ;;
	--*)
	    echo "Error: Unknown option [$1] was specified " >&2 
	    exit 1;
	    ;;
	*)
	    break;
	    ;;
    esac
done

export PBCURRENTCOMMANDLINEOPERATION="pdebuild"
"$PBUILDERSATISFYDEPENDSCMD"
apt-get install -y --force-yes fakeroot

# create the user similar to that used outside
groupadd -g "${BUILDRESULTGID}" -o pbgroup
useradd -g pbgroup -u "${BUILDRESULTUID}" -o pbuser

# what about id -G output? if other groups than the designated is used, we're stuffed.

export HOME=$(pwd)/../

# do build with that user.
export DEBBUILDOPTS
echo /usr/bin/dpkg-buildpackage -rfakeroot -us -uc '${DEBBUILDOPTS}' | su -p pbuser