SCLUG Installfest 2015

custom.sh

#!/bin/bash

set -e -x

# required for dpkg to work
export PATH=/usr/bin:/usr/sbin:/bin:/sbin

cat >/etc/apt/sources.list <<EOF
deb http://ap-southeast-2.archive.ubuntu.com/ubuntu/ trusty main restricted multiverse universe
deb http://ap-southeast-2.archive.ubuntu.com/ubuntu/ trusty-updates main restricted multiverse universe
deb http://ap-southeast-2.archive.ubuntu.com/ubuntu/ trusty-security main restricted multiverse universe
EOF

apt-get update

apt-get -y install software-properties-common
add-apt-repository -y ppa:webupd8team/java
apt-get update
echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | /usr/bin/debconf-set-selections
apt-get -y install oracle-java8-installer

apt-get -y install wget unzip
wget http://download.netbeans.org/netbeans/8.0.2/final/zip/netbeans-8.0.2-201411181905.zip
mkdir -p /opt
unzip netbeans-8.0.2-201411181905.zip -d /opt
rm netbeans-8.0.2-201411181905.zip

mkdir -p /usr/local/share/applications
cat >/usr/local/share/applications/netbeans.desktop <<EOF
[Desktop Entry]
Name=NetBeans
Exec=/opt/netbeans/bin/netbeans
Terminal=false
Type=Application
EOF

apt-get -y install \
	vim-gtk \
	gnuplot \
	nedit \
	kile \
	build-essential \
	ddd \
	wmaker \
	wmaker-data \
	menu \
	asclock \
	eclipse \
	anjuta \
	audacity \
	blender \
	bluefish \
	dia-gnome \
	eric \
	glade-gnome \
	inkscape \
	maxima \
	maxima-doc \
	mplayer \
	mplayer-doc \
	scilab \
	scilab-doc \
	scribus \
	scribus-doc \
	subversion \
	subversion-tools \
	umbrello \
	wxmaxima \
	openssh-server \
	git \
	valgrind \
	gfortran \
	cweb-latex \
	clisp

apt-get clean

cat >/etc/apt/sources.list <<EOF
deb http://au.archive.ubuntu.com/ubuntu/ trusty main restricted multiverse universe
deb http://au.archive.ubuntu.com/ubuntu/ trusty-updates main restricted multiverse universe
deb http://security.ubuntu.com/ubuntu/ trusty-security main restricted multiverse universe
EOF

run.sh

#!/bin/bash

ISO=ubuntu-14.04.2-desktop-amd64.iso
ISOURL=http://mirror.aarnet.edu.au/pub/ubuntu/releases/14.04.2/ubuntu-14.04.2-desktop-amd64.iso
LABEL='Installfest 2015'
DESTISO=sclug-installfest-2015.iso

# firstly, create your ./custom.sh
# then, run ./run.sh
# mounts $ISO, mounts filesystem.squashfs, runs ./custom.sh in it
# rebuilds squashfs into a new iso called $DESTISO

checks() {
	if [ "$UID" -ne "0" ]
	then
		echo " *** ERROR: Please run this as root"
		exit 1
	fi

	if [ ! -e "$ISO" ]
	then
		wget $ISOURL
	fi

	if [ ! -e "/sbin/mount.aufs" ]
	then
		echo " *** mount.aufs not found. installing aufs-tools..."
		apt-get -y install aufs-tools
	fi

	if [ ! -e "/lib/modules/`uname -r`/kernel/ubuntu/aufs/aufs.ko" ]
	then
		echo " *** aufs.ko not found. installing linux-image-extra-`uname -r`..."
		apt-get -y install linux-image-extra-`uname -r`
	fi

	if [ ! -e "/usr/bin/mksquashfs" ]
	then
		echo " *** mksquashfs not found. installing squashfs-tools..."
		apt-get -y install squashfs-tools
	fi

	if [ ! -e "/usr/bin/mkisofs" ]
	then
		echo " *** mkisofs not found. installing genisoimage..."
		apt-get -y install genisoimage
	fi

	if [ ! -e "/usr/bin/lxc-start" ]
	then
		echo " *** lxc-start not found. installing LXC..."
		apt-get -y install lxc
	fi

	if [ -e "tmp" -o -e "work" -o -e "iso" ]
	then
		echo " *** ERROR: The directory 'tmp', 'work', or 'iso' exists. Please clean it."
		exit 1
	fi
}

mounts() {
	mkdir \
		squashfs-rw squashfs-tmp squashfs-ro \
		iso-rw iso-tmp iso-ro

	mount -t iso9660 -o loop,ro $ISO iso-ro
	mount -t tmpfs none iso-tmp
	mount -t aufs -o br=iso-tmp:iso-ro none iso-rw

	echo " *** ISO $ISO mounted. Now mounting squashfs..."

	mount -t squashfs -o ro iso-ro/casper/filesystem.squashfs squashfs-ro
	mount -t tmpfs none squashfs-tmp
	mount -t aufs -o br=squashfs-tmp:squashfs-ro none squashfs-rw

	echo " *** Squashfs mounted."
}

cleanup() {
	RET=$1

	umount \
		squashfs-rw squashfs-tmp squashfs-ro \
		iso-rw iso-tmp iso-ro
	echo " *** tmp directories unmounted"

	rmdir \
		squashfs-rw squashfs-tmp squashfs-ro \
		iso-rw iso-tmp iso-ro
	echo " *** tmp directories removed"

	exit $RET
}

enter() {
	cp custom.sh squashfs-rw/custom.sh
	cp /etc/resolv.conf squashfs-rw/etc/resolv.conf

	echo " *** Running custom.sh inside LXC..."
	lxc-start \
		-n ubuntu-tweaker \
		-s lxc.rootfs=squashfs-rw \
		-s 'lxc.mount.auto=proc sys' \
		-s lxc.network.type=none \
		-F \
		/custom.sh

	rm squashfs-rw/custom.sh

	echo " *** LXC container finished!"
}

squash() {
	rm iso-rw/casper/filesystem.squashfs
	rm iso-rw/isolinux/boot.cat

	mksquashfs squashfs-rw iso-rw/casper/filesystem.squashfs
	printf $(du -sx --block-size=1 squashfs-rw | cut -f1) > iso-rw/casper/filesystem.size

	if [ -e "$DESTISO" ]
	then
		echo " *** $DESTISO already exists. Moving to $DESTISO.old..."
		mv "$DESTISO" "$DESTISO.old"
	fi

	mkisofs -D -r -V "$LABEL" -cache-inodes -J -l -b isolinux/isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o $DESTISO iso-rw
}

run() (
	set -e
	checks
	mounts
	enter
	squash
)

run
cleanup $?