#!/bin/sh
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

set -e
set -x

enable_eatmydata_override() {
    chroot $rootdir apt-get install --no-install-recommends -y eatmydata
    if [ -x $rootdir/usr/bin/eatmydata ] && \
        [ ! -f $rootdir/etc/apt/apt.conf.d/95debian-edu-install-dpkg-eatmydata ]; then
        echo "info: Adding apt config to call dpkg via eatmydata"
        printf "#!/bin/sh\nexec eatmydata dpkg \"\$@\"\n" \
            > $rootdir/var/tmp/dpkg-eatmydata
        chmod 755 $rootdir/var/tmp/dpkg-eatmydata
        cat > $rootdir/etc/apt/apt.conf.d/95debian-edu-install-dpkg-eatmydata <<EOF
Dir::Bin::dpkg "/var/tmp/dpkg-eatmydata";
EOF
    else
        echo "error: unable to find /usr/bin/eatmydata after installing the eatmydata package"
    fi
}

disable_eatmydata_override() {
    for override in \
        /etc/apt/apt.conf.d/95debian-edu-install-dpkg-eatmydata \
        /var/tmp/dpkg-eatmydata ; do
        echo "info: Removing apt config to call dpkg via eatmydata"
        if [ -f $rootdir$override ] ; then
            rm -f $rootdir$override
        else
            echo "warning: missing $rootdir$override"
        fi
    done
    sync # Flush file buffers before continuing
}

set_apt_sources() {
    NEW_MIRROR="$1"
    COMPONENTS="main"
    if [ "$ENABLE_NONFREE" = "yes" ]
    then
	    COMPONENTS="main contrib non-free"
    fi

    cat <<EOF > etc/apt/sources.list
deb $NEW_MIRROR $SUITE $COMPONENTS
deb-src $NEW_MIRROR $SUITE $COMPONENTS

#deb http://security.debian.org/ $SUITE/updates main
#deb-src http://security.debian.org/ $SUITE/updates main
EOF
}

# Set to true/false to control if eatmydata is used during build
use_eatmydata=true

rootdir="$1"
image=$(pwd)/"$2"
cd "$rootdir"

echo info: building $MACHINE for $ARCHITECTURE to $DESTINATION

export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true
export LC_ALL=C LANGUAGE=C LANG=C

# Override libpam-tmpdir setting during build, as the directories
# are not created yet.
export TMP=/tmp/ TMPDIR=/tmp/

# set this to 'true' to disable source fetching while debugging
export SOURCE=false

username=fbx
echo "warning: creating initial user $username with well known password!"
password=frdm
chroot $rootdir adduser --gecos $username --disabled-password $username
echo $username:$password | chroot $rootdir /usr/sbin/chpasswd
chroot $rootdir adduser $username sudo

case "$MACHINE" in
    virtualbox)
        # hide irrelevant console keyboard messages.
        echo "echo \"4 4 1 7\" > /proc/sys/kernel/printk" \
            >> /etc/init.d/rc.local
        ;;
esac

set_apt_sources $BUILD_MIRROR
chroot $rootdir apt-get update

cat > $rootdir/usr/sbin/policy-rc.d <<EOF
#!/bin/sh
exit 101
EOF
chmod a+rx $rootdir/usr/sbin/policy-rc.d

if $use_eatmydata ; then
    enable_eatmydata_override
fi

chroot $rootdir apt-get install -y freedombox-setup

rm $rootdir/usr/sbin/policy-rc.d

chroot $rootdir /usr/lib/freedombox/setup 2>&1 | \
    tee $rootdir/var/log/freedombox-setup.log

# copy u-boot to beginning of image
case "$MACHINE" in
    beaglebone)
	dd if=$rootdir/usr/lib/u-boot/am335x_boneblack/MLO of="$image" \
	   count=1 seek=1 conv=notrunc bs=128k
	dd if=$rootdir/usr/lib/u-boot/am335x_boneblack/u-boot.img of="$image" \
	   count=2 seek=1 conv=notrunc bs=384k
	;;
    cubietruck)
        dd if=$rootdir/usr/lib/u-boot/Cubietruck/u-boot-sunxi-with-spl.bin of="$image" \
           seek=8 conv=notrunc bs=1k
        ;;
esac

if $use_eatmydata ; then
    disable_eatmydata_override
fi

set_apt_sources $MIRROR
chroot $rootdir apt-get update

cd /
echo "info: killing leftover processes in chroot"
# 2014-11-04 this killed /usr/lib/erlang/erts-6.2/bin/epmd, see
# <URL: https://www.ejabberd.im/epmd?q=epmd > to learn more.
fuser -mvk $rootdir/. || true