#!/bin/sh

# Must be root to run this

set -e

cd $(hg root)

DEBVERSION=sid

PRISTINE=/var/local/cache/pristine/$DEBVERSION

if [ ! -e $PRISTINE ] ; then

    echo "Missing:" $PRISTINE

    echo "Debian pristine image not found, try running these commands as root:"

    echo mkdir -p /var/local/cache/pristine

    echo debootstrap $DEBVERSION $PRISTINE http://ftp.uk.debian.org/debian/

    exit -1

fi

BUILDDIR=$(pwd)/build

mkdir -p $BUILDDIR/env

BACKING=$BUILDDIR/env/backing

MOUNT=$BUILDDIR/env/mount

if [ -e $MOUNT ] ; then

    echo "Removing old filesystem"

    # FIXME: evil hack!

    chroot $MOUNT /etc/init.d/ssh stop || true

    umount $MOUNT/proc || true

    umount $MOUNT || true

    rm -rf $MOUNT

fi

if [ -e $BACKING ] ; then

    echo "Copying deb files into cache"

    cp $BACKING/var/cache/apt/archives/* $BUILDDIR/aptcache/$DEBVERSION || true

    echo "Deleting old filesystem backing store"

    rm -rf $BACKING

fi

mkdir $BACKING $MOUNT

touch $BACKING/please-trash-this-system

mkdir -p $BACKING/etc

echo "pristine" > $BACKING/etc/debian_chroot

mkdir -p $BACKING/var/cache/apt/archives

echo "Copying deb files out of cache"

cp $BUILDDIR/aptcache/$DEBVERSION/* $BACKING/var/cache/apt/archives || true

unionfs-fuse -o cow -o allow_other,suid,dev $BACKING=RW:$PRISTINE=RO $MOUNT

#mount --bind /dev "$MOUNT/dev"

#mount --bind /dev/pts "$MOUNT/dev/pts"

mount -t proc proc $MOUNT/proc

chroot $MOUNT ./action/go