ubuntu-dev-tools/ubuntu-sync

#!/bin/bash
set -e

# Syncronise new ubuntu CD images, depending on command-line flags given.
# If none are given, sync all images.

if [ -e /tmp/ubuntu-sync.01532-lock ]; then
	echo "Another copy of the script is running."
	exit 1
fi

Ubuntu_Distro_Dir="$HOME/distros/ubuntu"
Dist=gutsy

# Only sync the oldest images, and only i386 images if low bandwidth.
Low_Bandwidth=1

while [ -n "$1" ]; do
	case "$1" in
		-u)
			Image_Sets="${Image_Sets} ubuntu"
			break
		;;
		-k)
			Image_Sets="${Image_Sets} kubuntu"
			break
		;;
		-e)
			Image_Sets="${Image_Sets} edubuntu"
			break
		;;
		-x)
			Image_Sets="${Image_Sets} xubuntu"
			break
		;;
		-s)
			Image_Sets="${Image_Sets} ubuntu-server"
			break
		;;
	esac
	shift || true
done
if [ "${Low_Bandwidth}" == 1 ] && [ "${Image_Sets}" == "" ]; then
	cd "${Ubuntu_Distro_Dir}"
	Image_Sets=`ls -td1 */"${Dist}" | tail -1 | cut -f 1 -d /`
elif [ "${Low_Bandwidth}" == 0 ] && [ "${Image_Sets}" == "" ]; then
	Image_Sets="ubuntu xubuntu ubuntu-server edubuntu kubuntu"
fi

# Sync images.
if [ ! -e /tmp/ubuntu-sync.01532-lock ]; then
        touch /tmp/ubuntu-sync.01532-lock
fi
for Current_Set in ${Image_Sets}
do
	mkdir -p "${Ubuntu_Distro_Dir}/${Current_Set}/${Dist}"/.partial
	cd "${Ubuntu_Distro_Dir}/${Current_Set}/${Dist}"

	# Figure out remote path
	if [ "${Current_Set}" == "ubuntu" ]; then
		Origin=""
	else
		Origin="${Current_Set}"
	fi
	
	# Which flavors to download
	if [ "${Current_Set}" == "edubuntu" ]; then
		Flavors="install live"
	elif [ "${Current_Set}" == "ubuntu-server" ]; then
		Flavors="server live"
	else
		Flavors="alternate desktop"
	fi

	# Which archs to download
	if [ "${Low_Bandwidth}" == 0 ]; then
		Archs="i386 powerpc"
		#Archs="i386 amd64 powerpc"
	else
		Archs="i386"
	fi

	for arch in $Archs; do
		for flavor in $Flavors; do
			if rsync --partial-dir="${Ubuntu_Distro_Dir}/${Current_Set}/${Dist}/.partial" "rsync://cdimage.ubuntu.com/cdimage/${Origin}/daily/current/${Dist}-${flavor}-${arch}.iso" "${Dist}-${flavor}-${arch}.iso" ; then
			        date > "${flavor}-${arch}-sync"
			fi
		done
	done
done
rm /tmp/ubuntu-sync.01532-lock