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#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2006-2014 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="$(Echo 'debian sources')"
HELP=""
USAGE="${PROGRAM} [--force]"

Arguments "${@}"

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

if [ "${LB_SOURCE}" != "true" ]
then
	exit 0
fi

Echo_message "Begin downloading sources..."

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

# Checking stage file
Check_stagefile .build/source_debian

# Checking lock file
Check_lockfile .lock

# Creating lock file
Create_lockfile .lock

# Remove old sources
if [ -d source/debian ]
then
	rm -rf source/debian
fi

# Download sources
Chroot chroot "dpkg --get-selections" | awk '{ print $1 }' > source-selection.txt

cat >> source-selection.txt << EOF
${LB_BOOTLOADER}
live-build
EOF

case "${LB_BINARY_IMAGES}" in
	iso*)
		echo "xorriso" >> source-selection.txt
		;;

	hdd*)
		echo "parted" >> source-selection.txt
		;;
esac

case "${LB_CHROOT_FILESYSTEM}" in
	squashfs)
		echo "squashfs-tools" >> source-selection.txt
		;;
esac

case "${LB_BINARY_FILESYSTEM}" in
	fat*)
		echo "dosfstools" >> source-selection.txt
		;;

	ntfs)
		echo "ntfs-3g" >> source-selection.txt
		;;
esac

case "${LIVE_IMAGE_ARCHITECTURE}" in
	amd64|i386)

cat >> source-selection.txt << EOF
mtools
syslinux
grub
EOF

		if [ "${LB_MEMTEST}" != "false" ] && [ "${LB_MEMTEST}" != "none" ]
		then
			echo "${LB_MEMTEST}" >> source-selection.txt
		fi
		;;
esac

if [ -n "${LB_TASKS}" ]
then
	echo "${LB_TASKSEL}" >> source-selection.txt
fi

# apt-get source does not respect pinning
# building images with backports included but not enabled
# will result in apt-get source download stuff from backports
# where available. workaround: disable backports
case "${LB_MODE}" in
	progress-linux)
		case "${LB_DISTRIBUTION}" in
			*-backports)

				;;

			*)
				if grep -qs "${LB_DISTRIBUTION}-backports" chroot/etc/apt/sources.list.d/progress-linux.list
				then
					cp chroot/etc/apt/sources.list.d/progress-linux.list chroot/etc/apt/sources.list.d/progress-linux.list.orig

					while read _LINE
					do
						if echo "${_LINE}" | grep -qs ${LB_DISTRIBUTION}-backports
						then
							sed -i -e "s|${_LINE}|#${_LINE}|" chroot/etc/apt/sources.list.d/progress-linux.list
						fi
					done < chroot/etc/apt/sources.list.d/progress-linux.list.orig

					Apt chroot update
				fi
				;;
		esac
		;;
esac

MISSING=""

grep . source-selection.txt | \
while read PACKAGE
do
	if ! Chroot chroot "apt-get ${APT_OPTIONS} --download-only source ${PACKAGE}"
	then
		MISSING="${MISSING} ${PACKAGE}"
	fi
done

if [ -n "${MISSING}" ]
then
	cat > source/missing-source.txt << EOF
This file contains the list of binary packages that are installed on this live
system that do not have a corresponding source package.

EOF

	for PACKAGE in ${MISSING}
	do
		Chroot chroot "dpkg -l ${PACKAGE}" | tail -n1 >> source/missing-source.txt
	done
fi

rm -f source-selection.txt

# Sort sources
for DSC in chroot/*.dsc
do
	SOURCE="$(sed -n 's|^Source: ||p' ${DSC} 2>/dev/null || :)"
	# The sed may fail if multiple dsc files exist for same source, as the
	# first one to match will have already been moved.
	[ -n "$SOURCE" ] || continue

	case "${SOURCE}" in
		lib?*)
			LETTER="$(echo ${SOURCE} | sed 's|\(....\).*|\1|')"
			;;

		*)
			LETTER="$(echo ${SOURCE} | sed 's|\(.\).*|\1|')"
			;;
	esac

	# Install directory
	mkdir -p source/debian/"${LETTER}"/"${SOURCE}"

	# Move files
	mv chroot/"${SOURCE}"_* source/debian/"${LETTER}"/"${SOURCE}"
done

# Reverting apt sources again
if [ -e chroot/etc/apt/sources.list.d/progress-linux.list.orig ]
then
	mv chroot/etc/apt/sources.list.d/progress-linux.list.orig chroot/etc/apt/sources.list.d/progress-linux.list

	Apt chroot update
fi

# Creating stage file
Create_stagefile .build/source_debian