#! /bin/bash
#   pbuilder-internal -- personal Debian package builder, internal routine
#   Copyright (C) 2003-2009 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 -q -y "${APTGETOPT[@]}" pbuilder passwd

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

cd "$1"
shift;

# dummy function that does enough, real one is defined elsewhere.
# We don't deal with LOGLEVEL here, though.
# We can't just source the modules and use log.{i,w,e} since we don't know if
# the pbuilder version inside the chroot is new enough.
function log() {
    echo "$*"
}

while [ -n "$1" ]; do 
    case "$1" in 
	--debbuildopts)
	    # append to DEBBUILDOPTS or reset to empty if $2 isn't set
	    DEBBUILDOPTS="${2:+${DEBBUILDOPTS:+$DEBBUILDOPTS }$2}";
	    log "I: Setting DEBBUILDOPTS=$DEBBUILDOPTS"
	    shift; shift;
	    ;;
	--uid)
	    BUILDRESULTUID=$2
	    shift; shift;
	    ;;
	--gid)
	    BUILDRESULTGID=$2
	    shift; shift;
	    ;;
	--pbuildersatisfydepends)
	    PBUILDERSATISFYDEPENDSCMD=$2
	    shift; shift;
	    ;;
	--debug)
	    PBUILDER_DEBUGMODE=yes
	    set -x
	    shift;
	    ;;
	--*)
	    log "E: Unknown option [$1] was specified "
	    exit 1;
	    ;;
	*)
	    break;
	    ;;
    esac
done

# Calling pbuilder-runhooks; we try to fix up enough to fool
# pbuilder-runhooks.  The following source call depends on
# pbuilder-runhook inside the chroot, which might be different from
# the version outside the chroot.
. /usr/lib/pbuilder/pbuilder-runhooks
# fool pbuilder-runhooks to use / as buildplace, since I am already
# inside chroot.
BUILDPLACE=/
# chroot command will just chroot to /, which will effectively chdir
# to / and nothing else.
CHROOTEXEC="chroot $BUILDPLACE "
# make HOOKDIR contain something if there is a hook, to fool HOOKDIR
# check inside pbuilder-runhooks that there is HOOKDIR
# configuration. We don't call loadhooks or unloadhooks ourselves,
# pbuilder execute will do that for you, so we should be okay.
# TODO: handle when --hookdir was not initially specified.
if [ -d "/$hookdir" ]; then
    HOOKDIR="/$hookdir"
fi

executehooks "D"
export PBCURRENTCOMMANDLINEOPERATION="pdebuild"
"$PBUILDERSATISFYDEPENDSCMD"
apt-get install -q -y "${APTGETOPT[@]}" fakeroot


# set home directory to ..
export HOME=$(readlink -f $(pwd)/../)
if [ -z "${HOME}" ]; then
    echo "E: Failed to obtain reasonable HOME from pwd"
fi

# create the user similar to that used outside.
# TODO: what about id -G output? if other groups than the designated
# is used, we're stuffed.
groupadd -g "${BUILDRESULTGID}" -o pbgroup
useradd -g pbgroup -u "${BUILDRESULTUID}" -d "${HOME}" -o pbuser

executehooks "A"

# do build with that user.
# $DEBBUILDOPTS is evaluated inside the su and chroot.
export DEBBUILDOPTS
CMD="env PATH=$PATH /usr/bin/dpkg-buildpackage -rfakeroot -us -uc "'${DEBBUILDOPTS}'
echo "I: Running $CMD"
# This command should be ran with current directory as bind-mounted
# package source directory
if echo "$CMD" | \
    su -p pbuser; 
    then
    # build was successful
    :
else
    executehooks "C"
    exit 1
fi

executehooks "B"