#!/bin/bash -e

RELEASE='12.04'
PACKAGE_NAME="ubuntu-desktop-custom"
PACKAGE_VERSION="1.0.$(date +%Y-%m-%d.%H-%M)"

DEPENDS='
git
mercurial
subversion
netcat6
netcat-openbsd
sqlite3
unrar
zip
xz-utils
gnome-session-fallback
lightdm-gtk-greeter
vim
aptitude
curl
colordiff
cryptsetup
curl
dvdbackup
elinks
equivs
gvfs-bin
keepassx
libav-tools
lvm2
build-essential
libreoffice
mythes-en-au
mythes-en-us
python-lxml
renameutils
screen
sshfs
xdotool
xsel
language-pack-en
language-pack-gnome-en
hyphen-en-us
dconf-tools
gpick
gstreamer-tools
imagemagick
xtightvncviewer
rdesktop
exiftags
fdupes
kid3-qt
screenruler
atop
mplayer
'

EXCLUDE='
activity-log-manager-control-center
app-install-data-partner
apport-gtk
branding-ubuntu
checkbox-qt
deja-dup
empathy
example-content
gnome-session
gnome-session-canberra
gwibber
ibus
ibus-gtk3
ibus-pinyin
ibus-pinyin-db-android
ibus-table
in-switch
kerneloops-daemon
landscape-client-ui-install
launchpad-integration
nautilus-share
nautilus-sendto
rhythmbox
rhythmbox-plugin-magnatune
rhythmbox-ubuntuone
software-center
software-properties-gtk
telepathy-idle
thunderbird
thunderbird-gnome-support
transmission-gtk
ubuntu-sounds
ubuntuone-client-gnome
ubuntuone-installer
unity
unity-2d
unity-greeter
whoopsie
xul-ext-ubufox
'


####################
# Preflight checks #
####################

if [ "$(lsb_release -r | cut -d ':' -f 2 | tr -d '	 ')" != "$RELEASE" ]; then
	echo "Sorry, at the moment this script only supports Ubuntu $RELEASE"
	exit 1
fi

if ! grep -q universe /etc/apt/sources.list /etc/apt/sources.list.d/*.list; then
	echo "You must enable universe in your apt sources.list"
	exit 1
fi

if ! grep -q multiverse /etc/apt/sources.list /etc/apt/sources.list.d/*.list; then
	echo "You must enable multiverse in your apt sources.list"
	exit 1
fi

if ! which equivs-build > /dev/null; then
	sudo apt-get install equivs
fi



##########################
# Build the control file #
##########################

CONTROLFILE="$(tempfile)"
echo "-- Writing control file to $CONTROLFILE"

cat > "$CONTROLFILE" <<EOT
Package: $PACKAGE_NAME
Section: metapackages
Priority: optional
Standards-Version: 3.9.2
Conflicts: ubuntu-desktop
Replaces: ubuntu-desktop

Version: $PACKAGE_VERSION
Description: Customised Ubuntu desktop system
 Similar to ubuntu-desktop, but with some additions and removals.
EOT

function get_line {
	line="$(apt-cache show ubuntu-desktop | grep "$1:")"
	for pkg in $EXCLUDE; do
		line="$(echo "$line" | sed -e "s/$pkg, //" -e "s/, $pkg\$//")"
	done
	echo -n "$line"
}

(
echo

get_line 'Depends'
echo ", $(echo $DEPENDS | sed 's/ /, /g')"

get_line 'Recommends'
echo
) >> "$CONTROLFILE"


##################
# Build the .deb #
##################

echo "-- Building .deb in working directory"
equivs-build "$CONTROLFILE"
rm -f "$CONTROLFILE"


#############
# Go go go! #
#############

echo "-- Go go go!"
sudo aptitude install $DEPENDS
sudo dpkg -i "${PACKAGE_NAME}_${PACKAGE_VERSION}_all.deb"
sudo aptitude purge $REMOVE