#!/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/apt/sources.list"
USAGE="${PROGRAM} {source|binary|chroot} {install|remove} [--force]"

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

_PASS="${1}"
_ACTION="${2}"
shift 2

if ! In_list "${_PASS}" "binary" "chroot" "source"; then
	Echo_error "Invalid pass parameter: '${_PASS}'"
	Usage --fail
fi

# Requiring stage file
Require_stagefiles config bootstrap

case "${_ACTION}" in
	install)
		Echo_message "Configuring file /etc/apt/sources.list"

		# Checking stage file
		Check_stagefile

		# Acquire lock file
		Acquire_lockfile

		# Restoring cache
		Restore_package_cache chroot

		# Mount local repository
		if echo "${LB_PARENT_MIRROR_CHROOT}" | grep -q '^file:/'
		then
			Chroot_bind_path chroot "$(echo ${LB_PARENT_MIRROR_CHROOT} | sed -e 's|file:||')"
		fi

		# Configure custom sources.list
		Create_apt_sources_list chroot "${_PASS}"

		# Adding local apt sources (chroot)
		for FILE in config/archives/*.list config/archives/*.list.chroot
		do
			if [ -e "${FILE}" ]
			then
				sed -e "s|@DISTRIBUTION@|${LB_DISTRIBUTION_CHROOT}|g" \
				    -e "s|@PARENT_DISTRIBUTION@|${LB_PARENT_DISTRIBUTION_CHROOT}|g" \
				    -e "s|@ARCHIVE_AREAS@|${LB_ARCHIVE_AREAS}|g" \
				    -e "s|@PARENT_ARCHIVE_AREAS@|${LB_PARENT_ARCHIVE_AREAS}|g" \
				"${FILE}" > "chroot/etc/apt/sources.list.d/$(basename ${FILE} .chroot)"

				if [ "${_PASS}" != "source" ] && [ "${LB_APT_SOURCE_ARCHIVES}" = "false" ]
				then
					# Disable source archives
					sed -i "s/^deb-src/#deb-src/g" "chroot/etc/apt/sources.list.d/$(basename ${FILE} .chroot)"
				fi
			fi
		done

		# Adding local apt configuration (chroot)
		for FILE in config/archives/*.conf config/archives/*.conf.chroot
		do
			if [ -e "${FILE}" ]
			then
				cp ${FILE} chroot/etc/apt/apt.conf.d/$(basename ${FILE} .chroot)
			fi
		done

		# Adding local apt preferences (chroot)
		for FILE in config/archives/*.pref config/archives/*.pref.chroot
		do
			if [ -e "${FILE}" ]
			then
				cp ${FILE} chroot/etc/apt/preferences.d/$(basename ${FILE} .chroot)
			fi
		done

		# Check local archive keys (chroot)
		if Find_files config/archives/*.key || \
		   Find_files config/archives/*.key.chroot
		then
			for FILE in config/archives/*.key \
					config/archives/*.key.chroot
			do
				if [ -e "${FILE}" ]
				then
					if grep -q "PGP PUBLIC KEY BLOCK" "${FILE}"
					then
						cp ${FILE} chroot/etc/apt/trusted.gpg.d/$(basename ${FILE}).asc
					else
						cp ${FILE} chroot/etc/apt/trusted.gpg.d/$(basename ${FILE}).gpg
					fi
				fi
			done
		fi

		# Configure local package repository
		if Find_files config/packages.chroot/*.deb || Find_files config/packages/*.deb
		then
			rm -rf chroot/root/packages
			mkdir -p chroot/root/packages

			if [ "$(stat --printf %d config/packages.chroot/)" = "$(stat --printf %d chroot/root/packages/)" ] ||
			   [ "$(stat --printf %d config/packages/)" = "$(stat --printf %d chroot/root/packages/)" ]
			then
				CP_OPTIONS="-l"
			fi

			# Copy packages
			if Find_files config/packages.chroot/*_"${LB_ARCHITECTURE}".deb || Find_files config/packages/*_"${LB_ARCHITECTURE}".deb
			then
				for FILE in config/packages.chroot/*_"${LB_ARCHITECTURE}".deb config/packages/*_"${LB_ARCHITECTURE}".deb
				do
					if [ -L "${FILE}" ]
					then
						cp -L "${FILE}" chroot/root/packages
					elif [ -e "${FILE}" ]
					then
						cp ${CP_OPTIONS} "${FILE}" chroot/root/packages
					fi
				done
			fi

			if Find_files config/packages.chroot/*_all.deb || Find_files config/packages/*_all.deb
			then
				for FILE in config/packages.chroot/*_all.deb config/packages/*_all.deb
				do
					if [ -L "${FILE}" ]
					then
						cp -L "${FILE}" chroot/root/packages
					elif [ -e "${FILE}" ]
					then
						cp ${CP_OPTIONS} "${FILE}" chroot/root/packages
					fi
				done
			fi

			if Find_files chroot/root/packages/*.deb
			then
				# If we bootstrapped a minimal chroot, we need
				# to install apt-utils before we have
				# completed all the indices.
				if [ ! -e chroot/usr/bin/apt-ftparchive ]
				then
					Apt chroot update
				fi

				# Check depends
				Check_package chroot /usr/bin/apt-ftparchive apt-utils

				# Installing depends
				Install_packages

				# Generate Packages and Packages.gz
				echo "cd /root/packages && apt-ftparchive packages . > Packages" | Chroot chroot sh
				gzip -9 -c chroot/root/packages/Packages > chroot/root/packages/Packages.gz

				# Generate Release
				echo "cd /root/packages && apt-ftparchive \
					-o APT::FTPArchive::Release::Origin=config/packages.chroot \
					release . > Release" | Chroot chroot sh

				# Add to sources.list.d
				echo "deb [ trusted=yes ] file:/root/packages ./" > chroot/etc/apt/sources.list.d/packages.list

				# Move top-level sources away, otherwise apt always preferes it (#644148)
				if [ -e chroot/etc/apt/sources.list ]
				then
					mv chroot/etc/apt/sources.list chroot/etc/apt/sources.list.d/zz-sources.list
				fi

				# Removing depends
				Remove_packages
			else
				Echo_warning "Local packages must be named with suffix '_all.deb' or '_\$architecture.deb'."
			fi
		fi

		if Find_files chroot/root/packages/*.deb
		then
			gunzip < chroot/root/packages/Packages.gz | awk '/^Package: / { print $2 }' \
			>> chroot/root/packages.chroot
		fi

		# Update indices from cache
		if [ "${LB_CACHE_INDICES}" = "true" ] && [ -d cache/indices.bootstrap ]
		then
			if Find_files cache/indices.bootstrap/secring.gpg*
			then
				cp -f cache/indices.bootstrap/secring.gpg* chroot/etc/apt
			fi

			if Find_files cache/indices.bootstrap/trusted.gpg*
			then
				cp -rf cache/indices.bootstrap/trusted.gpg* chroot/etc/apt
			fi

			if [ -f cache/indices.bootstrap/pkgcache.bin ]
			then
				cp -f cache/indices.bootstrap/pkgcache.bin chroot/var/cache/apt
			fi

			if [ -f cache/indices.bootstrap/srcpkgcache.bin ]
			then
				cp -f cache/indices.bootstrap/srcpkgcache.bin chroot/var/cache/apt
			fi

			if Find_files cache/indices.bootstrap/*_Packages
			then
				cp -f cache/indices.bootstrap/*_Packages chroot/var/lib/apt/lists
			fi

			if Find_files cache/indices.bootstrap/*_Sources
			then
				cp -f cache/indices.bootstrap/*_Sources chroot/var/lib/apt/lists
			fi

			if Find_files cache/indices.bootstrap/*Release*
			then
				cp -f cache/indices.bootstrap/*Release* chroot/var/lib/apt/lists
			fi

			if [ "${LB_APT}" = "aptitude" ] && ! command -v aptitude >/dev/null
			then
				Chroot chroot "apt-get ${APT_OPTIONS} update"
				Chroot chroot "apt-get ${APT_OPTIONS} install aptitude"
			fi
		else # Get fresh indices
			# Check local keyring packages
			if Find_files config/archives/*.deb
			then
				for PACKAGE in config/archives/*.deb
				do
					cp ${PACKAGE} chroot/root
					Chroot chroot "dpkg -i /root/$(basename ${PACKAGE})"
					rm -f chroot/root/$(basename ${PACKAGE})
				done
			fi

			# Installing aptitude
			if [ "${LB_APT}" = "aptitude" ] && [ ! $(Chroot chroot "which aptitude") ]
			then
				Chroot chroot "apt-get ${APT_OPTIONS} update"
				Chroot chroot "apt-get ${APT_OPTIONS} install aptitude"
			fi

			# Rebuild apt indices from scratch.
			# Due to the fact that apt doesn't understand
			# pinning on the fly, we need to manually remove
			# the cached indices and rebuild them again.
			rm -rf chroot/var/cache/apt/*.bin

			Apt chroot update

			# Installing keyring packages
			if [ -n "${LB_KEYRING_PACKAGES}" ]
			then
				Apt chroot "install ${LB_KEYRING_PACKAGES}"
			fi

			rm -rf chroot/var/cache/apt/*.bin

			Apt chroot update
			Apt chroot "upgrade"
			Apt chroot "dist-upgrade"

			if [ "${LB_CACHE_INDICES}" = "true" ]
			then
				mkdir -p cache/indices.bootstrap

				if Find_files chroot/etc/apt/secring.gpg*
				then
					cp -f chroot/etc/apt/secring.gpg* cache/indices.bootstrap
				fi

				cp -rf chroot/etc/apt/trusted.gpg* cache/indices.bootstrap

				cp -f chroot/var/cache/apt/pkgcache.bin cache/indices.bootstrap

				if Find_files chroot/var/cache/apt/srcpkgcache.bin
				then
					cp -f chroot/var/cache/apt/srcpkgcache.bin cache/indices.bootstrap
				fi

				cp -f chroot/var/lib/apt/lists/*_Packages cache/indices.bootstrap

				if Find_files chroot/var/lib/apt/lists/*_Sources
				then
					cp -f chroot/var/lib/apt/lists/*_Sources cache/indices.bootstrap
				fi

				cp -f chroot/var/lib/apt/lists/*Release* cache/indices.bootstrap
			fi
		fi

		# Saving cache
		Save_package_cache chroot

		# Creating stage file
		Create_stagefile
		;;

	remove)
		Echo_message "Deconfiguring file /etc/apt/sources.list"

		# Acquire lock file
		Acquire_lockfile

		# Restore top-level sources
		if [ -e chroot/etc/apt/sources.list.d/zz-sources.list ]
		then
			mv chroot/etc/apt/sources.list.d/zz-sources.list chroot/etc/apt/sources.list
		fi

		# Configure generic indices
		# Cleaning apt list cache
		rm -rf chroot/var/lib/apt/lists
		mkdir -p chroot/var/lib/apt/lists/partial

		# Configure custom sources.list
		Create_apt_sources_list binary "${_PASS}"

		# Removing chroot-only apt sources
		for FILE in config/archives/*.list.chroot
		do
			if [ -e "${FILE}" ]
			then
				rm -f "chroot/etc/apt/sources.list.d/$(basename ${FILE} .chroot)"
			fi
		done

		# Removing chroot-only apt configuration
		for FILE in config/archives/*.conf.chroot
		do
			if [ -e "${FILE}" ]
			then
				rm -f "chroot/etc/apt/apt.conf.d/$(basename ${FILE} .chroot)"
			fi
		done

		# Removing chroot-only apt preferences
		for FILE in config/archives/*.pref.chroot
		do
			if [ -e "${FILE}" ]
			then
				rm -f "chroot/etc/apt/preferences.d/$(basename ${FILE} .chroot)"
			fi
		done

		# Adding local apt sources (binary)
		for FILE in config/archives/*.list config/archives/*.list.binary
		do
			if [ -e "${FILE}" ]
			then
				sed -e "s|@DISTRIBUTION@|${LB_DISTRIBUTION_BINARY}|g" \
				    -e "s|@PARENT_DISTRIBUTION@|${LB_PARENT_DISTRIBUTION_BINARY}|g" \
				    -e "s|@ARCHIVE_AREAS@|${LB_ARCHIVE_AREAS}|g" \
				    -e "s|@PARENT_ARCHIVE_AREAS@|${LB_PARENT_ARCHIVE_AREAS}|g" \
				"${FILE}" > "chroot/etc/apt/sources.list.d/$(basename ${FILE} .binary)"

				if [ "${_PASS}" != "source" ] && [ "${LB_APT_SOURCE_ARCHIVES}" = "false" ]
				then
					# Disable source archives
					sed -i "s/^deb-src/#deb-src/g" "chroot/etc/apt/sources.list.d/$(basename ${FILE} .binary)"
				fi
			fi
		done

		# Adding local apt configuration (binary)
		for FILE in config/archives/*.conf config/archives/*.conf.binary
		do
			if [ -e "${FILE}" ]
			then
				cp ${FILE} chroot/etc/apt/apt.conf.d/$(basename ${FILE} .binary)
			fi
		done

		# Adding local apt preferences (binary)
		for FILE in config/archives/*.pref config/archives/*.pref.binary
		do
			if [ -e "${FILE}" ]
			then
				cp ${FILE} chroot/etc/apt/preferences.d/$(basename ${FILE} .binary)
			fi
		done

		# Adding local apt keys (binary)
		for FILE in config/archives/*.key config/archives/*.key.binary
		do
			if [ -e "${FILE}" ]
			then
				cp ${FILE} chroot/etc/apt/trusted.gpg.d/$(basename ${FILE}).asc
			fi
		done

		# Updating indices
		Apt chroot update

		# Unmount local repository - after apt update or it will fail due to missing files
		if echo "${LB_PARENT_MIRROR_CHROOT}" | grep -q '^file:/'
		then
			Chroot_unbind_path chroot "$(echo ${LB_PARENT_MIRROR_CHROOT} | sed -e 's|file:||')"
		fi

		# Cleaning apt package cache
		rm -rf chroot/var/cache/apt
		mkdir -p chroot/var/cache/apt/archives/partial

		# Cleaning apt package lists
		if [ "${LB_APT_INDICES}" = "false" ]
		then
			rm -rf chroot/var/lib/apt/lists
			mkdir -p chroot/var/lib/apt/lists/partial
		fi

		# Remove local package repository
		rm -f chroot/etc/apt/sources.list.d/packages.list
		rm -rf chroot/root/packages

		# Ensure package list is removed
		rm -f chroot/root/packages.chroot

		# Removing stage file
		Remove_stagefile
		;;

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