~ubuntu-defaults-it-team/ubuntu-defaults-it/additional-tools

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#!/bin/sh
# Clean the Live Build binary stage made with ubuntu-defaults-image 
# for building the image again starting from the existing cdroot.
#
# Authors: Paolo Sammicheli <xdatap1@ubuntu.com>
#
# 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, see <http://www.gnu.org/licenses/>.

set -e
#set -x

help () {
    cat >&2 <<EOF
Usage: $0 [--help]

Clean the Live Build binary stage made with ubuntu-defaults-image 
for building the image again starting from the existing cdroot.

It must be invoked from a directory containing files made with 
ubuntu-default-image. More infos: https://wiki.ubuntu.com/ItalianCD/Tools

Options:
  --help                  : shown this help
EOF
}

clean () {
# checking if exist .stage directory, otherwise exit with error

if [ ! -d .stage ]; then
	echo "\nERROR: .stage directory not found. \nYou must run this sommand from a directory containing files mage with ubuntu-defaults-image"
else
	echo "Saving configuration in a tarball..."
	tar --preserve-permissions -czf config.tar.gz config/ binary.packages.*

	echo "Performing live-build clean"
	$SUDO lb clean --binary

	echo "restoring original configuration..."
	tar --preserve-permissions -zxvf config.tar.gz > /dev/null

	echo "Cleaning tarball configuration files"
	rm config.tar.gz
fi
}

# Starting main body

# Checking sudo
if [ "$(id -u)" = 0 ]; then
    SUDO=env
else
    SUDO=sudo
fi

# Checking parameters. If so printing help
if [ -z $1 ]; then
	clean
else
	help
fi