#!/bin/sh
#
# Copyright (C) 2013 Daniel Francis <francis@sugarlabs.org>
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.

check_root () {
    echo "#############################"
    echo "Checking for root permissions"
    echo "#############################"
    if [ `whoami` != root ]; then
	echo $0 ": Need to run as root. Stopping."
	exit
    fi
    echo "##### OK #####"
}

clean_install () {
    echo "##########################"
    echo "Cleaning install directory"
    echo "##########################"
    if [ -d ./install ]; then
	rm -Rf ./install
    fi
    mkdir install
    echo "[OK]"
}

copy_files () {
    echo "#############"
    echo "Copying files"
    echo "#############"
    cp sources.list install/etc/apt/
    cp sugar-env-setup.sh install/usr/bin/
    cp sugar-build-clone.sh install/usr/bin/
    cp sugar-build-command install/usr/bin/
    cp install/etc/bash.bashrc install/root/.bashrc
    echo "##### OK #####"
}

create_symlinks () {
    echo "#######################"
    echo "Creating symbolic links"
    echo "#######################"

    ln -s install/home/sugar/sugar-build/source ./source
    mkdir install/home/sugar/sugar-build/activities
    ln -s install/home/sugar/sugar-build/activities ./activities

    echo "##### OK #####"
}

# Installation function
installenv () {
    check_root
    clean_install

    echo "######################"
    echo "Installing base system"
    echo "######################"
    debootstrap --variant=buildd quantal ./install http://archive.ubuntu.com/ubuntu/

    copy_files
    ./sugar-chroot install sugar-env-setup.sh
    create_symlinks
}

chrootshell () {
    check_root
    ./sugar-chroot install su sugar
}

# Help message
usage () {
    echo "Usage:"
    echo $0 install - Install the environment and build Sugar
    echo $0 shell - A virtual shell to run Sugar
    echo $0 help - Show this help message and exit
}

#Check for arguments
case $1 in
    install)
	installenv
	;;
    shell)
	chrootshell
	;;
    symlinks)
	create_symlinks
	;;
    *)
	usage
	;;
esac