live-build/scripts/build/chroot_debianchroot

#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2016-2020 The Debian Live team
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


set -e

# Including common functions
[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh

# Setting static variables
DESCRIPTION="Manage /etc/debian_chroot"
USAGE="${PROGRAM} {install|remove} [--force]"

# Processing arguments and configuration files
Init_config_data "${@}"

_ACTION="${1}"
shift

# Requiring stage file
Require_stagefiles config bootstrap

case "${_ACTION}" in
	install)
		Echo_message "Configuring file /etc/debian_chroot"

		# Checking stage file
		Check_stagefile

		# Acquire lock file
		Acquire_lockfile

		if [ -f chroot/etc/debian_chroot ]
		then
			# Save chroot file
			mv chroot/etc/debian_chroot chroot/etc/debian_chroot.orig
		fi

		# Create chroot file
		echo "live" > chroot/etc/debian_chroot

		# Creating stage file
		Create_stagefile
		;;

	remove)
		Echo_message "Deconfiguring file /etc/debian_chroot"

		# Checking stage file
		Ensure_stagefile_exists

		# Acquire lock file
		Acquire_lockfile

		if [ -f chroot/etc/debian_chroot.orig ]
		then
			# Restore chroot file
			mv chroot/etc/debian_chroot.orig chroot/etc/debian_chroot
		else
			# Remove chroot file
			rm -f chroot/etc/debian_chroot
		fi

		# Removing stage file
		Remove_stagefile
		;;

	*)
		Echo_error "Invalid action parameter: '${_ACTION}'"
		Usage --fail
		;;
esac