#!/bin/bash

###################################################################################
# UCK - Ubuntu Customization Kit                                                  #
# Copyright (C) 2006-2010 UCK Team                                                #
#                                                                                 #
# UCK 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.                                             #
#                                                                                 #
# UCK 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 UCK.  If not, see <http://www.gnu.org/licenses/>.                    #
###################################################################################

function failure()
{
	echo "$@"
	exit 1
}

function failure_user()
{
	failure "Script was cancelled by the user"
}

function gui_failure()
{
	dialog_msgbox "Error" "$@"
	failure "$@"
}

############################
# parsing input parameters #
############################
USE_MOUNT=
WAIT_BEFORE_EXIT=0
SAVED_ARGS="$@"
while [ -n "$1" ]; do
	case "$1" in
	--wait-before-exit)
		WAIT_BEFORE_EXIT=1;;
	-m|--mount)
		USE_MOUNT=-m;;
	-*)	echo "Unexpected argument: $1" >&2
		echo "Usage: $0 [--wait-before-exit] [-m] [remaster_home]" >&2
		exit 1;;
	*)	break;;
	esac
	shift
done

REMASTER_HOME=${1:-~/tmp}
LIVECD_ISO_LOCATION=$REMASTER_HOME/remaster-new-files/livecd.iso


if [ -e libraries/gui.sh ]; then
	SCRIPTS_DIR=`dirname "$0"`
	LIBRARIES_DIR=$SCRIPTS_DIR/libraries
else
	SCRIPTS_DIR=/usr/bin
	LIBRARIES_DIR=/usr/lib/uck/
fi

############
# MESSAGES #
############

if [ -e VERSION ]; then
	VERSION=`cat VERSION`
else
	VERSION=`cat /usr/lib/uck/VERSION`
fi

rel="`lsb_release -is` `lsb_release -rs`"
kernel=`uname -rm`

WELCOME_TEXT=`cat <<EOF
Welcome to Ubuntu Customization Kit $VERSION!
(Running on $rel, $kernel)

This tool lets you create Ubuntu live CDs in your language,
with all the necessary language packs preinstalled.
It also changes the boot screen to appear in your chosen language.

Requirements:
1. about 5 GB of free disk space in $HOME/tmp
   (on local machine and mounted with "dev,suid,exec" options)
2. Internet access

Homepage: http://uck.sourceforge.net
Authors: http://uck.sourceforge.net/team
License: GPL v3
EOF
`

RUN_CUSTOMIZATIONS_TEXT=`cat <<EOF
You will be provided with menu to choose from customization actions when build reaches proper place.

This menu app will be run your Xserver, but with the title "UCK customization menu".
It will appear when unpacking CD and installing predefined packages is done, so it might take a long time.
All operations you do there will affect only customized CD.
You can:
- Run package manager to add or remove software or repositories (see Note 2 for information about upgrading kernel packages).
- Run console app for manual customizations in shell.
- Run predefined customization actions.

When you finish customization, quit the application and building process will proceed.

Note 1: package application will be run after language packs are installed according to previous selections, so you do not have to do this again.

Note 2: upgrading kernel package updates kernel used to run live CD (latest one available will be used). You can remove earlier version using package application, just like any other package.

Note 3: sources.list changes are not propagated to installed system.

Note 4: Simple upgrading system increases CD size, as some other updates might increase size.
You will probably have to remove something from image to make it fit on CD.
EOF
`

PRE_START_TEXT=`cat <<EOF
All the necessary information has been gathered.
Building will now start.

Note: You will have to provide your password on the command-line

Your live CD will be created as:

	$LIVECD_ISO_LOCATION

Please fasten your seatbelts and enjoy the ride!
EOF
`

BUILD_SUCCESS_TEXT=`cat <<EOF
Building was successful!

You can find your live CD in:

	$LIVECD_ISO_LOCATION

If you have installed the \"qemu\" package, you can test the image by doing:

	qemu -cdrom $LIVECD_ISO_LOCATION -boot d -m 256
EOF
`

BUILD_FAILURE_TEXT=`cat <<EOF
Building failed.

Please look at $REMASTER_HOME/build.log to see what went wrong.

If you cannot find the problem, please send a support request at:

	https://launchpad.net/products/uck/+addticket
EOF
`

#########################
# EXECUTION STARTS HERE #
#########################

. $LIBRARIES_DIR/gui.sh

if [ `id -un` = "root" ] ; then
	gui_failure "UCK GUI should not be run as root, please run again as a normal user. You will be asked for your password when administrator privileges are required."
fi

dialog_msgbox "Welcome" "$WELCOME_TEXT"

AVAILABLE_LANGUAGE_PACKS=`apt-cache pkgnames language-support | egrep '^language-support-.{2,7}$' | cut -b 18- | sort`
if [ "$AVAILABLE_LANGUAGE_PACKS" == "" ]; then
	AVAILABLE_LANGUAGE_PACKS=`apt-cache pkgnames language-pack | egrep '^language-pack-.{2,7}$' | grep -v base | grep -v gnome | grep -v kde | cut -b 15- | sort`
fi

CD_LANGS=`dialog_multi_choice $'Please choose language packs to install\n(you can choose more than one)' $AVAILABLE_LANGUAGE_PACKS`
RESULT=$?

if [ $RESULT -ne 0 ] ; then
	failure_user
fi

LANGLIST_FILE="$LIBRARIES_DIR/langlist"
AVAILABLE_BOOT_LANGS=$(cat $LANGLIST_FILE)
BOOT_CD_LANGS=`dialog_multi_choice $'Please choose which languages will be available at boot of live CD\n(some might not be supported by the specific Ubuntu release you\'re customizing)' $AVAILABLE_BOOT_LANGS`
RESULT=$?

if [ $RESULT -ne 0 ] ; then
	failure_user
fi

if [ "$BOOT_CD_LANGS" == "" ]; then
	BOOT_CD_LANGS=$AVAILABLE_BOOT_LANGS
fi

while true; do
	BOOT_CD_LANG=`dialog_menu $'Please choose which language will be selected by default at boot of live CD' $BOOT_CD_LANGS`
	RESULT=$?

	if [ $RESULT -ne 0 ] ; then
		failure_user
	fi

	if [ "$BOOT_CD_LANG" != "" ]; then
		break
	fi
done

if [ -z "$CD_LANGS" ] ; then
	DESKTOP_TYPES=""
else
	DESKTOP_TYPES=`dialog_multi_choice $'Please choose desktop environments which will be present on customized CD\n(you can choose more than one)' unity gnome kde others`
	if [ "$DESKTOP_TYPES" = "unity" ]; then
		DESKTOP_TYPES="gnome"
	fi
	if [ "$DESKTOP_TYPES" = "others" ]; then
		DESKTOP_TYPES=""
	fi
fi

RESULT=$?
if [ $RESULT -ne 0 ] ; then
	failure_user
fi

while true; do
	ISO_IMAGE=`dialog_choose_file "Please choose an ISO image to be used as the basis for your live CD."`

	if [ -z "$ISO_IMAGE" ] ; then
		failure_user
	fi

	if [ ! -r "$ISO_IMAGE" ] ; then
		dialog_msgbox "Non-existent file" "File $ISO_IMAGE does not exist"
		continue
	fi

	if [ ! -r "$ISO_IMAGE" ] ; then
		dialog_msgbox "Unreadable file" "File $ISO_IMAGE cannot be read, do you have permissions for this file?"
		continue
	fi

	if [ "`isoinfo -p -i \"$ISO_IMAGE\" | grep -i CASPER | wc -l`" = "0" ] ; then
		dialog_msgbox "Not an Ubuntu Desktop ISO image" "File $ISO_IMAGE is not an Ubuntu Desktop Edition ISO image, alternate CDs can be remastered using backend scripts."
		continue
	fi
	break
done

while true; do
	ISO_DESCRIPTION=`dialog_line_input "Please enter the name for your CD (you can leave it blank, 32 chars max)" "Customized Ubuntu live CD" `
	RESULT=$?

	if [ $RESULT -ne 0 ] ; then
		failure_user
	fi

	DESCRIPTION_LEN=`echo "$ISO_DESCRIPTION" | wc -c`

	if [ "$DESCRIPTION_LEN" -gt 32 ]; then
		dialog_msgbox "ISO description too long" "The description must not be longer than 32 characters (yours is $DESCRIPTION_LEN characters)"
		continue
	fi
	break
done

RUN_MANUAL_CUSTOMIZATIONS=`dialog_menu "Do you want to customize the CD manually during building (using package utilities, console, etc.)?" yes no`
if [ $? -ne 0 ] ; then
	failure_user
fi

REMOVE_WIN32_FILES=`dialog_menu $'Do you want to delete all windows-related files from the CD?\nThese are files that will appear when you use the CD under Windows (wubi, autorun.inf, etc.)' yes no`
if [ $? -ne 0 ] ; then
	failure_user
fi

HYBRID=`dialog_menu $'Do you want to generate a hybrid image(ISO/USB)' yes no`
if [ $? -ne 0 ] ; then
	failure_user
fi

dialog_msgbox "Ready to build" "$PRE_START_TEXT"

echo "Preparing build environment..."
if [ ! -e "$REMASTER_HOME" ]; then
	mkdir "$REMASTER_HOME" || gui_failure "Unable to create $REMASTER_HOME directory"
fi
BUILD_DIR=$REMASTER_HOME/customization-scripts
rm -rf "$BUILD_DIR" || gui_failure "Unable to remove previous build directory ($BUILD_DIR)"
mkdir $BUILD_DIR || gui_failure "Unable to create $BUILD_DIR directory"

cp -a "$LIBRARIES_DIR"/customization-profiles/localized_cd/* "$BUILD_DIR"/
cp -a "$LIBRARIES_DIR"/gui.sh "$BUILD_DIR"/

echo "$CD_LANGS" >"$BUILD_DIR"/language_packs
echo "$BOOT_CD_LANGS" >"$BUILD_DIR"/livecd_locales
echo "$BOOT_CD_LANG" >"$BUILD_DIR"/livecd_locale
echo "$DESKTOP_TYPES" >"$BUILD_DIR"/desktop_types
echo "$ISO_DESCRIPTION" >"$BUILD_DIR"/iso_description
echo "$RUN_MANUAL_CUSTOMIZATIONS" >"$BUILD_DIR"/run_manual_customizations
echo "$REMOVE_WIN32_FILES" >"$BUILD_DIR"/remove_win32_files
echo "$HYBRID" >"$BUILD_DIR"/hybrid
echo "yes" >"$BUILD_DIR"/clean_desktop_manifest

# Pass proxy variables around sudo to chroot environment
>"$BUILD_DIR"/environment
for var in `env | grep -i _proxy`
do
	name=`echo "$var" | sed 's/=.*//'`
	value=`echo "$var" | sed 's/[^=]*=//'`
	echo "export $name=\"$value\"" >>"$BUILD_DIR"/environment
done

if [ "$RUN_MANUAL_CUSTOMIZATIONS" = "yes" ] ; then
	echo "Creating X authentication cookie..."
	xauth extract - $DISPLAY > "$BUILD_DIR"/Xcookie || failure "Cannot create Xauthentication cookie in $BUILD_DIR/Xcookie, error=$?"
fi

echo "Running build process..."
(
echo "Build ($0 $SAVED_ARGS) started at `date +'%Y-%m-%d %H:%M:%S'`"
export UCK_USERNAME="$USER"
sudo bash "$SCRIPTS_DIR"/uck-remaster $USE_MOUNT "$ISO_IMAGE" "$BUILD_DIR" "$REMASTER_HOME"
RESULT=$?

if [ $RESULT -ne 0 ]; then
	dialog_msgbox "Build failure" "$BUILD_FAILURE_TEXT"
else
	dialog_msgbox "Build success" "$BUILD_SUCCESS_TEXT"

	MAX_CD_700MB_SIZE=737280000 #From http://en.wikipedia.org/wiki/CD-ROM

	ISO_SIZE=`stat --format='%s' "$LIVECD_ISO_LOCATION"`

	if [ $ISO_SIZE -ge $MAX_CD_700MB_SIZE ] ; then
		dialog_msgbox "ISO too big" "Warning: ISO image might be too big to fit on 700MB CD-ROM"
	fi
fi
echo "Build ended at `date +'%Y-%m-%d %H:%M:%S'`"
) 2>&1 | tee -a $REMASTER_HOME/build.log

if [ $WAIT_BEFORE_EXIT = 1 ] ; then
  echo -n "Press ENTER to close the terminal"
  read FAKE_EXIT_CHECK
fi