live-build/scripts/build/chroot_hooks

#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2006-2012 Daniel Baumann <daniel@debian.org>
##
## 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="$(Echo 'execute hooks in chroot')"
HELP=""
USAGE="${PROGRAM} [--force]"

Arguments "${@}"

# Reading configuration files
Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults

Echo_message "Begin executing hooks..."

# Requiring stage file
Require_stagefile .build/config .build/bootstrap

# Checking stage file
Check_stagefile .build/chroot_hooks

# Checking lock file
Check_lockfile .lock

# Creating lock file
Create_lockfile .lock

## Processing distribution hooks

# Make build config available to chroot hooks. First, make the bind
# mount and then make it read-only. This can't happen in one mount
# command, then the resulting mount will be rw (see mount(8)). Making it
# ro prevents modifications and prevents accidentally removing the
# contents of the config directory when removing the chroot.
mkdir -p chroot/root/config
mount -o bind config chroot/root/config
mount -o remount,ro,bind config chroot/root/config

# Copying hooks
for _HOOK in ${LB_CHROOT_HOOKS}
do
	for LOCATION in "${LIVE_BUILD}/hooks" /usr/share/live/build/hooks
	do
		for FILE in "${LOCATION}"/???-"${_HOOK}".chroot
		do
			if [ -e "${FILE}" ]
			then
				mkdir -p chroot/root/lb_chroot_hooks
				cp "${FILE}" chroot/root/lb_chroot_hooks
			fi
		done
	done
done

# Running hooks
if ls chroot/root/lb_chroot_hooks/* > /dev/null 2>&1
then
	for _HOOK in chroot/root/lb_chroot_hooks/*
	do
		Chroot chroot "/root/lb_chroot_hooks/$(basename ${_HOOK})" || { Echo_error "${_HOOK} failed (exit non-zero). You should check for errors."; exit 1 ;}
		rm -f chroot/root/lb_chroot_hooks/"$(basename ${_HOOK})"
	done

	rmdir chroot/root/lb_chroot_hooks
fi

## Processing local hooks

if Find_files config/hooks/*.chroot
then
	# Restoring cache
	Restore_cache cache/packages.chroot

	for _HOOK in config/hooks/*.chroot
	do
		# Copying hook
		cp "${_HOOK}" chroot/root

		# Making hook executable
		if [ ! -x chroot/root/"$(basename ${_HOOK})" ]
		then
			chmod +x chroot/root/"$(basename ${_HOOK})"
		fi

		# Executing hook
		Chroot chroot "/root/$(basename ${_HOOK})" || { Echo_error "${_HOOK} failed (exit non-zero). You should check for errors."; exit 1 ;}

		# Removing hook
		rm -f chroot/root/"$(basename ${_HOOK})"
	done

	# Saving cache
	Save_cache cache/packages.chroot

	# Creating stage file
	Create_stagefile .build/chroot_hooks
fi

# Remove bind mount of build config inside chroot.
umount chroot/root/config
rmdir chroot/root/config