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#!/usr/bin/env bash

in_array() (
	set +x
	local needle=$1; shift
	local item
	for item in "$@"; do
		[[ $item = $needle ]] && return 0 # Found
	done
	return 1 # Not Found
)

split_lib() {
	local d=$1

	local t=("$d"/test-*)
	if [[ -f ${t[0]} ]]; then
		mkdir "$d/test"
		mv "$d"/test-* -t "$d/test"
	fi

	mkdir "$d/src"
	mv "$d"/*.c -t "$d/src"

	local h=${d##*/lib}
	mkdir "$d/include"
	mkdir "$d/include/$h"
	mv "$d"/*.h -t "$d/include/$h"
}

grp() {
	local grp=$1
	shift
	if [[ -d "${grp}.d" ]]; then
		mv -T "${grp}.d" "$grp"
	else
		mkdir "$grp"
	fi
	mv "$@" -t "$grp"
}

move_files() (
	# first focus on getting directories to the right names.
	mv -T src/{,systemd-}dbus1-generator
	mv -T src/{,systemd-}debug-generator
	mv -T src/{,systemd-}fstab-generator
	mv -T src/{,systemd-}getty-generator
	mv -T src/{,systemd-}gpt-auto-generator
	mv -T src/{,systemd-}rc-local-generator
	mv -T src/{,systemd-}system-update-generator
	mv -T src/{,systemd-}sysv-generator

	mv -T src/{,systemd-}ac-power
	mv -T src/{,systemd-}analyze
	mv -T src/{,systemd-}ask-password
	mv -T src/{,systemd-}backlight
	mv -T src/{,systemd-}binfmt
	mv -T src/{,systemd-}cgls
	mv -T src/{,systemd-}cgroups-agent
	mv -T src/{,systemd-}cgtop
	mv -T src/{,systemd-}cryptsetup
	mv -T src/{,systemd-}delta
	mv -T src/{,systemd-}detect-virt
	mv -T src/{,systemd-}escape
	mv -T src/{,systemd-}firstboot
	mv -T src/{,systemd-}fsck
	mv -T src/{,systemd-}hibernate-resume
	mv -T src/{,systemd-}hwdb
	mv -T src/{,systemd-}initctl
	mv -T src/{,systemd-}machine-id-setup
	mv -T src/{,systemd-}modules-load
	mv -T src/{,systemd-}notify
	mv -T src/{,systemd-}nspawn
	mv -T src/{,systemd-}path
	mv -T src/{,systemd-}quotacheck
	mv -T src/{,systemd-}random-seed
	mv -T src/{,systemd-}remount-fs
	mv -T src/{,systemd-}reply-password
	mv -T src/{,systemd-}rfkill
	mv -T src/{,systemd-}run
	mv -T src/{,systemd-}sleep
	mv -T src/{,systemd-}stdio-bridge
	mv -T src/{,systemd-}sysctl
	mv -T src/{,systemd-}sysusers
	mv -T src/{,systemd-}tmpfiles
	mv -T src/{,systemd-}tty-ask-password-agent
	mv -T src/{,systemd-}update-done
	mv -T src/{,systemd-}update-utmp
	mv -T src/{,systemd-}user-sessions
	mv -T src/vconsole     src/systemd-vconsole-setup
	mv -T src/socket-proxy src/systemd-socket-proxyd
	mv -T src/timesync     src/systemd-timesyncd
	mv -T src/activate     src/systemd-socket-activate

	mv src/udev/*_id      -t src
	mv src/udev/mtd_probe -t src
	mv src/udev/collect   -t src

	mv -T src/boot/efi src/systemd-boot
	mv -T src/boot     src/bootctl

	mkdir src/libsystemd/src
	mv -t src/libsystemd/src src/libsystemd/sd-*
	mkdir src/libsystemd/include
	mv -T src/systemd src/libsystemd/include/systemd

	mkdir src/busctl
	mv src/libsystemd/src/sd-bus/busctl* -t src/busctl

	mkdir src/systemd
	mv -t src/systemd \
	   src/core/main* \
	   src/core/*systemd* \
	   src/core/system.conf \
	   src/core/user.conf
	mkdir src/systemd-shutdown
	mv -t src/systemd-shutdown \
	   src/core/shutdown* \
	   src/core/umount*
	mv -T src/{,lib}core

	mv -T src/{,lib}basic
	mv -T src/{,lib}shared

	mv -T src/lib{shared,core}/linux

	mkdir src/libfirewall
	mv -T src/lib{shared,firewall}/firewall-util.c
	mv -T src/lib{shared,firewall}/firewall-util.h

	split_lib src/libbasic
	split_lib src/libsystemd-network

	split_lib src/libshared
	mv src/libshared/{test,include/shared}/test-tables.h
	rmdir src/libshared/test

	mkdir src/systemd-hibernate-resume-generator
	mv -t src/systemd-hibernate-resume-generator \
	   src/systemd-hibernate-resume/*generator*

	# src/resolve => src/{libbasic-dns,resolve,resolved}
	mkdir src/libbasic-dns
	mv -t src/libbasic-dns \
	   src/resolve/dns-type.{c,h} \
	   src/resolve/resolved-dns-{answer,dnssec,packet,question,rr}.{c,h} \
	   src/resolve/test-*
	mkdir src/systemd-resolve
	mv -t src/systemd-resolve \
	   src/resolve/resolve-tool.c
	mkdir src/systemd-resolved
	mv -t src/systemd-resolved \
	   src/resolve/.gitignore \
	   src/resolve/*
	rmdir src/resolve

	# src/import => src/{libimport,systemd-{export,importd,import}}
	mkdir src/libimport
	mv -t src/libimport \
	   src/import/import-common.{c,h} \
	   src/import/import-compress.{c,h} \
	   src/import/qcow2-util.{c,h} \
	   src/import/test-qcow2.c
	mkdir src/systemd-export
	mv -t src/systemd-export \
	   src/import/export*
	mkdir src/systemd-importd
	mv -t src/systemd-importd \
	   src/import/.gitignore \
	   src/import/importd.c \
	   src/import/org.*
	mkdir src/systemd-import
	mv -t src/systemd-import \
	   src/import/import*
	mkdir src/systemd-pull
	mv -t src/systemd-pull \
	   src/import/pull* \
	   src/import/curl-util*
	rmdir src/import

	# src/journal => src/..
	mkdir src/libjournal-core
	mv -t src/libjournal-core \
	   src/journal/.gitignore \
	   src/journal/journald-* \
	   src/journal/test-*
	mkdir src/systemd-cat
	mv -t src/systemd-cat \
	   src/journal/cat.c
	mkdir src/journalctl
	mv -t src/journalctl \
	   src/journal/journal-qrcode.{c,h} \
	   src/journal/journalctl.c
	mkdir src/systemd-journald
	mv -t src/systemd-journald \
	   src/journal/journald.*
	mkdir src/libsystemd/src/sd-journal
	mv -t src/libsystemd/src/sd-journal \
	   src/journal/audit-type.c \
	   src/journal/audit-type.h \
	   src/journal/catalog.c \
	   src/journal/catalog.h \
	   src/journal/compress.c \
	   src/journal/compress.h \
	   src/journal/fsprg.c \
	   src/journal/fsprg.h \
	   src/journal/journal-authenticate.c \
	   src/journal/journal-authenticate.h \
	   src/journal/journal-def.h \
	   src/journal/journal-file.c \
	   src/journal/journal-file.h \
	   src/journal/journal-internal.h \
	   src/journal/journal-send.c \
	   src/journal/journal-vacuum.c \
	   src/journal/journal-vacuum.h \
	   src/journal/journal-verify.c \
	   src/journal/journal-verify.h \
	   src/journal/lookup3.c \
	   src/journal/lookup3.h \
	   src/journal/mmap-cache.c \
	   src/journal/mmap-cache.h \
	   src/journal/sd-journal.c
	rmdir src/journal

	# src/network => src/...
	mkdir src/systemd-networkd-wait-online
	mv -t src/systemd-networkd-wait-online \
	   src/network/networkd-wait-online*
	mkdir src/libnetworkd-core
	mv -t src/libnetworkd-core \
	   src/network/.gitignore \
	   src/network/networkd-*
	mkdir src/networkctl
	mv -t src/networkctl \
	   src/network/networkctl.c
	mkdir src/systemd-networkd
	mv -t src/systemd-networkd \
	   src/network/networkd* \
	   src/network/org.*
	mkdir src/grp-network.d
	mv -t src/grp-network.d \
	   src/network/test-*
	rmdir src/network

	# src/machine => src/{machinectl,systemd-machined}
	mkdir src/machinectl
	mv -t src/machinectl \
	   src/machine/machinectl*
	mkdir src/systemd-machined
	mv -t src/systemd-machined \
	   src/machine/.gitignore \
	   src/machine/*
	rmdir src/machine

	# src/coredump => src/{coredumpctl,systemd-coredump}
	mkdir src/coredumpctl
	mv -t src/coredumpctl \
	   src/coredump/coredumpctl*
	mkdir src/systemd-coredump
	mv -t src/systemd-coredump \
	   src/coredump/*
	rmdir src/coredump

	# src/hostname => src/{hostnamectl,systemd-hostnamed}
	mkdir src/hostnamectl
	mv -t src/hostnamectl \
	   src/hostname/hostnamectl*
	mkdir src/systemd-hostnamed
	mv -t src/systemd-hostnamed \
	   src/hostname/.gitignore \
	   src/hostname/*
	rmdir src/hostname

	# src/journal-remote => src/...
	mkdir src/systemd-journal-gatewayd
	mv -t src/systemd-journal-gatewayd \
	   src/journal-remote/journal-gateway*
	mkdir src/systemd-journal-remote
	mv -t src/systemd-journal-remote \
	   src/journal-remote/journal-remote*
	mkdir src/systemd-journal-upload
	mv -t src/systemd-journal-upload \
	   src/journal-remote/journal-upload*
	mkdir src/grp-remote.d
	mv -t src/grp-remote.d \
	   src/journal-remote/.gitignore \
	   src/journal-remote/browse.html \
	   src/journal-remote/log-generator.py \
	   src/journal-remote/microhttpd*
	rmdir src/journal-remote

	# src/locale => src/...
	mkdir src/localectl
	mv -t src/localectl \
	   src/locale/localectl*
	mkdir src/systemd-localed
	mv -t src/systemd-localed \
	   src/locale/.gitignore \
	   src/locale/*
	rmdir src/locale

	# src/login => src/...
	mkdir src/grp-login.d
	mv -t src/grp-login.d \
	   src/login/.gitignore \
	   src/login/test-*
	mkdir src/loginctl
	mv -t src/loginctl \
	   src/login/loginctl* \
	   src/login/sysfs-show*
	mkdir src/pam_systemd
	mv -t src/pam_systemd \
	   src/login/pam*
	mkdir src/systemd-inhibit
	mv -t src/systemd-inhibit \
	   src/login/inhibit*
	mkdir src/systemd-logind
	mv -t src/systemd-logind \
	   src/login/logind* \
	   src/login/*.rules \
	   src/login/*.rules.in \
	   src/login/org.*
	mv -T src/login/systemd-user.m4 src/systemd-logind/systemd-user.pam.m4
	rmdir src/login

	# src/timedate => src/...
	mkdir src/timedatectl
	mv -t src/timedatectl \
	   src/timedate/timedatectl*
	mkdir src/systemd-timedated
	mv -t src/systemd-timedated \
	   src/timedate/.gitignore \
	   src/timedate/timedated* \
	   src/timedate/org.*
	rmdir src/timedate

	# src/udev => src/...
	mv -T src/udev/udev.h src/libudev/udev.h
	mkdir src/udevadm
	mv -t src/udevadm \
	   src/udev/udevadm*
	mkdir src/libudev-core
	mv -t src/libudev-core \
	   src/udev/net \
	   src/udev/udev-*
	mkdir src/systemd-udevd
	mv -t src/systemd-udevd \
	   src/udev/udev.conf* \
	   src/udev/udevd*
	mkdir src/grp-udev.d
	mv -t src/grp-udev.d \
	   src/udev/.gitignore \
	   src/udev/udev.*
	rm src/udev/.vimrc
	rmdir src/udev

	# .conf is such a useless suffix
	for ext in sysctl sysusers tmpfiles; do
		for file in $ext.d/*.conf*; do
			mv -T "$file" "${file/.conf/.$ext}"
		done
	done
	for ext in xorg; do
		for file in $ext/*.sh*; do
			mv -T "$file" "${file/.sh/.$ext}"
		done
	done

	# less obvious manpage groups
	mv -T man/{glib-event-glue,sd_event_get_fd-glib-example}.c
	mv -T man/systemd-{halt.service,shutdown}.xml
	mv -T man/systemd-{suspend.service,sleep}.xml
	mv -t src/libsystemd \
	   man/libsystemd* \
	   man/sd*
	mv -t src/libudev \
	   man/udev_*
	mkdir src/manpages
	mv -t src/manpages \
	   man/daemon.xml \
	   man/file-hierarchy.xml \
	   man/hostname.xml \
	   man/locale.conf.xml \
	   man/localtime.xml \
	   man/machine-id.xml \
	   man/machine-info.xml \
	   man/os-release.xml
	mv -t src/systemctl \
	   man/halt.xml \
	   man/runlevel.xml \
	   man/shutdown.xml \
	   man/telinit.xml \
	   man/systemd.preset.xml
	mv -t src/systemd \
	   man/systemd-system.conf.xml
	mkdir src/grp-system.d
	mv -t src/grp-system.d \
	   man/bootup.xml \
	   man/kernel-command-line.xml
	mv -t src/systemd-udevd \
	   man/udev.conf.xml
	mv -t src/grp-udev.d \
	   man/udev.xml
	mv -t src/systemd-cryptsetup \
	   man/*crypt*
	mv -t src/systemd-machine-id-setup \
	   man/systemd-machine-id*
	mv -t src/systemd-path src/libsystemd/include/systemd/sd-path*
	mv -t src/systemd-path src/libsystemd/src/sd-path/*
	rmdir src/libsystemd/src/sd-path
	mv -t src/systemd-resolved \
	   man/dnssec-trust-anchors*
	mv -t src/systemd-tty-ask-password-agent \
	   man/systemd-ask-password-console*

	# less obvious unit groups
	# suffix these with '*' in case they gain or lose the .in suffix.
	for thing in hibernate hybrid-sleep suspend; do
		mv -t src/systemd-sleep \
		   units/"$thing".target* \
		   units/systemd-"$thing".service*
	done
	for thing in halt kexec poweroff reboot; do
		mv -t src/systemd-shutdown \
		   units/"$thing".target* \
		   units/systemd-"$thing".service*
	done
	mv -t src/systemd-binfmt \
	   units/*binfmt*
	mv -t src/systemd-modules-load \
	   units/kmod*
	mv -t src/systemd-quotacheck \
	   units/quota*
	mv -t src/systemd-journald \
	   units/*journald*
	mv -t src/systemd-cryptsetup \
	   units/cryptsetup*
	mv -t src/systemd-logind \
	   units/user.slice*
	mv -t src/systemd-machined \
	   units/machine.slice*

	# muck
	mv -t src/libbasic/include/basic src/libbasic/.gitignore
	mv -T {test,src/systemd-boot}/test-efi-create-disk.sh
	mv -t src/systemd-tmpfiles units/systemd-tmpfiles*
	mv -t src/systemd-tmpfiles \
	   tmpfiles.d/tmp.* \
	   tmpfiles.d/var.* \
	   tmpfiles.d/etc.* \
	   tmpfiles.d/home.* \
	   tmpfiles.d/*nologin* \
	   tmpfiles.d/legacy.* \
	   tmpfiles.d/x11.*
	mv -t src/systemd-sysusers \
	   sysusers.d/.gitignore \
	   sysusers.d/basic*
	mkdir src/libudev/src
	mv -t src/libudev/src src/libudev/*.{c,h}
	mkdir src/libudev/include
	mv -T src/libudev/{src,include}/libudev.h
	mv -T src/{systemd-networkd,libnetworkd-core}/networkd.h
	mv -T src/{systemd-resolved,libbasic-dns}/resolved-def.h
	mv -t src/cdrom_id  rules/*cdrom*
	mv -t src/mtd_probe rules/*mtd*
	mv -t src/v4l_id    rules/*v4l*
	mv -t src/libsystemd-network/include/systemd-network \
	   src/libsystemd/include/systemd/sd-dhcp* \
	   src/libsystemd/include/systemd/sd-ipv4* \
	   src/libsystemd/include/systemd/sd-lldp* \
	   src/libsystemd/include/systemd/sd-ndisc*
	for l in device hwdb netlink network resolve; do
		mv -T src/libsystemd/include/systemd/sd-$l.h src/libsystemd/src/sd-$l/sd-$l.h
	done
	mkdir src/grp-journal.d
	mv -t src/grp-journal.d tmpfiles.d/journal-nocow.*
	mv -t src/grp-remote.d tmpfiles.d/systemd-remote.*
	mv -t src/systemd tmpfiles.d/systemd-tmpfs.tmpfiles*
	mv -t src/systemd xorg/??-systemd-user.*; rmdir xorg
	mv -t src/systemd-vconsole-setup man/vconsole.conf.xml
	mv -t src/systemd-coredump \
	   sysctl.d/*coredump*
	mv -t src/systemd-sysctl \
	   sysctl.d/??-default.*

	mv -t src/systemd-sysv-generator \
	   docs/sysvinit/.gitignore \
	   docs/sysvinit/*
	rmdir docs/sysvinit
	mv -t src/grp-journal.d \
	   docs/var-log/.gitignore \
	   docs/var-log/*
	rmdir docs/var-log
	rm docs/.gitignore
	rmdir docs

	# auto-distribute the stuff
	for d in man units sysusers.d tmpfiles.d; do
		pushd $d >/dev/null
		for file in *; do
			base=${file%%.*}
			base=${base%%@*}
			if [[ -d ../src/"${base}" ]]; then
				mv "$file" -t ../src/"${base}"
			elif [[ -d ../src/"${base#systemd-}" ]]; then
				mv "$file" -t ../src/"${base#systemd-}"
			elif [[ -d ../src/systemd-"${base}" ]]; then
				mv "$file" -t ../src/systemd-"${base}"
			fi
		done
		popd >/dev/null
	done
	rmdir sysusers.d #tmpfiles.d

	pushd shell-completion/bash >/dev/null
	mv -T  systemctl.in ../../src/systemctl/systemctl.completion.bash.in
	cat .gitignore   >> ../../src/systemctl/.gitignore
	rm .gitignore
	for file in *; do
		if [[ -d ../../src/"$file" ]]; then
			mv -T "$file" "../../src/$file/$file.completion.bash"
		fi
	done
	popd >/dev/null
	rmdir shell-completion/bash

	pushd shell-completion/zsh >/dev/null
	mv -T _systemctl.in ../../src/systemctl/systemctl.completion.zsh.in
	cat .gitignore   >> ../../src/systemctl/.gitignore
	rm .gitignore
	for file in _*; do
		if [[ -d ../../src/"${file#_}" ]]; then
			mv -T "$file" "../../src/${file#_}/${file#_}.completion.zsh"
		fi
	done
	popd >/dev/null
	mv -T shell-completion/zsh src/zsh-completion
	rmdir shell-completion

	# do this *after* auto-splitting, because of
	# systemd-journal-{gatewayd,remote,upload}.
	mv -t src/journalctl \
	   units/*journal*
	# fix a false positive
	mv -t units \
	   src/systemd-shutdown/shutdown.target

	# categorize
	grp src/grp-boot \
	    src/bootctl \
	    src/kernel-install \
	    src/systemd-boot
	grp src/grp-coredump \
	    src/coredumpctl \
	    src/systemd-coredump
	grp src/grp-hostname \
	    src/hostnamectl \
	    src/systemd-hostnamed
	grp src/grp-initprogs \
	    src/systemd-backlight \
	    src/systemd-binfmt \
	    src/systemd-detect-virt \
	    src/systemd-firstboot \
	    src/systemd-fsck \
	    src/systemd-modules-load \
	    src/systemd-quotacheck \
	    src/systemd-random-seed \
	    src/systemd-rfkill \
	    src/systemd-sysctl \
	    src/systemd-sysusers \
	    src/systemd-tmpfiles \
	    src/systemd-update-done \
	    src/systemd-update-utmp \
	    src/systemd-user-sessions \
	    src/systemd-vconsole-setup
	grp src/grp-initprogs/grp-sleep \
	    src/systemd-hibernate-resume \
	    src/systemd-hibernate-resume-generator \
	    src/systemd-sleep
	grp src/grp-remote \
	    src/systemd-journal-gatewayd \
	    src/systemd-journal-remote \
	    src/systemd-journal-upload
	grp src/grp-journal \
	    catalog \
	    src/grp-remote \
	    src/journalctl \
	    src/libjournal-core \
	    src/systemd-cat \
	    src/systemd-journald
	grp src/grp-locale \
	    src/localectl \
	    src/systemd-localed
	grp src/grp-login \
	    src/loginctl \
	    src/pam_systemd \
	    src/systemd-inhibit \
	    src/systemd-logind
	grp src/grp-machine \
	    src/machinectl \
	    src/nss-mymachines \
	    src/systemd-machined
	grp src/grp-machine/grp-import \
	    src/libimport \
	    src/systemd-export \
	    src/systemd-import \
	    src/systemd-importd \
	    src/systemd-pull
	grp src/grp-network \
	    network \
	    src/libnetworkd-core \
	    src/networkctl \
	    src/systemd-networkd \
	    src/systemd-networkd-wait-online
	grp src/grp-resolve \
	    src/libbasic-dns \
	    src/nss-resolve \
	    src/systemd-resolve \
	    src/systemd-resolved
	grp src/grp-system \
	    src/libcore \
	    src/systemctl \
	    src/systemd \
	    src/systemd-shutdown
	grp src/grp-system/grp-utils \
	    src/systemd-analyze \
	    src/systemd-delta \
	    src/systemd-fstab-generator \
	    src/systemd-run \
	    src/systemd-sysv-generator
	grp src/grp-timedate \
	    src/systemd-timedated \
	    src/timedatectl
	grp src/grp-udev \
	    rules \
	    hwdb \
	    src/libudev-core \
	    src/*_id \
	    src/collect \
	    src/mtd_probe \
	    src/systemd-hwdb \
	    src/systemd-udevd \
	    src/udevadm
	grp src/grp-utils \
	    src/systemd-ac-power \
	    src/systemd-escape \
	    src/systemd-notify \
	    src/systemd-path \
	    src/systemd-socket-activate

	mv -t src/systemd-timesyncd system-preset/??-timesyncd.preset
	for file in system-preset/??-*.preset; do
		base="${file##*/??-}"
		base="${base%.preset}"
		base="${base%d}"
		mv -t src/grp-"$base" "$file"
	done
	rmdir system-preset
)

breakup_makefile() (
	mkdir -p build-aux/Makefile.{once,each}.{head,tail}

	touch .tmp.move.all
	files=(.tmp.move.all)
	file=/dev/null
	IFS=''
	declare -i i=0
	trap 'printf "Makefile.am:%d:%s\n" $i "$line"' EXIT
	while read -r line; do
		i+=1
		if [[ $line = '#@'* ]]; then
			file="${line#'#@'}"
			file="${file%% *}"
			if [[ $file = auto/* ]]; then
				IFS=/
				read -r auto dir makefile <<<"$file"
				IFS=''
				[[ $auto = auto ]]
				[[ $makefile = Makefile ]]
				d="$(find src -type d -name "$dir")"
				[[ -n "$d" ]]
				[[ "$(wc -l <<<"$d")" = 1 ]]
				file="$d/Makefile"
			fi
			if [[ "$file" != all ]] && ! in_array "$file" "${files[@]}"; then
				cat .tmp.move.all > "$file"
				files+=("$file")
			fi
		elif [[ $file = all ]]; then
			printf '%s\n' "$line" | tee -a "${files[@]}" >/dev/null
		else
			printf '%s\n' "$line" >> "$file"
		fi
	done < <(fixup_makefile <Makefile.am)
	trap -- EXIT
	rm .tmp.move.all

	sed -ri \
	    -e '/^[^#	]*:/ { s|\S+/|$(outdir)/|g }' \
	    src/libbasic/include/basic/Makefile \
	    src/libsystemd/src/Makefile \
	    src/libsystemd/src/sd-journal/Makefile \
	    src/grp-udev/libudev-core/Makefile

	ln -sT ../grp-system/libcore/mount-setup.h src/systemd-remount-fs/mount-setup.h
	ln -sT ../grp-system/libcore/mount-setup.c src/systemd-remount-fs/mount-setup.c
	ln -sT ../libcore/mount-setup.h src/grp-system/systemd-shutdown/mount-setup.h
	ln -sT ../libcore/mount-setup.c src/grp-system/systemd-shutdown/mount-setup.c
	ln -sT ../libcore/killall.h src/grp-system/systemd-shutdown/killall.h
	ln -sT ../libcore/killall.c src/grp-system/systemd-shutdown/killall.c
	ln -sT ../../libcore/mount-setup.h src/grp-system/grp-utils/systemd-fstab-generator/mount-setup.h
	ln -sT ../../libcore/mount-setup.c src/grp-system/grp-utils/systemd-fstab-generator/mount-setup.c
	ln -sT ../grp-system/libcore/mount-setup.h src/systemd-nspawn/mount-setup.h
	ln -sT ../grp-system/libcore/loopback-setup.h src/systemd-nspawn/loopback-setup.h
	ln -sT ../grp-system/libcore/loopback-setup.c src/systemd-nspawn/loopback-setup.c
	ln -sT ../grp-system/libcore/machine-id-setup.h src/systemd-nspawn/machine-id-setup.h
	ln -sT ../grp-system/libcore/machine-id-setup.c src/systemd-nspawn/machine-id-setup.c
	ln -sT ../grp-system/libcore/mount-setup.c src/systemd-nspawn/mount-setup.c
	ln -sT ../../../libsystemd/include/systemd/_sd-common.h src/libsystemd-network/include/systemd-network/_sd-common.h
	ln -sT ../../libsystemd/include/systemd/_sd-common.h src/grp-utils/systemd-path/_sd-common.h
	ln -sT ../../grp-login/systemd-logind/logind-acl.h src/grp-udev/libudev-core/logind-acl.h
	ln -sT ../../libsystemd/src/sd-login/sd-login.c src/grp-udev/libudev-core/sd-login.c
	ln -sT ../../grp-login/systemd-logind/logind-acl.c src/grp-udev/libudev-core/logind-acl.c
	ln -sT ../../../libshared/include/shared/gcrypt-util.h src/libsystemd/src/sd-journal/gcrypt-util.h
	ln -sT ../../../libshared/src/gcrypt-util.c src/libsystemd/src/sd-journal/gcrypt-util.c
	ln -sT ../grp-system/libcore/machine-id-setup.h src/systemd-machine-id-setup/machine-id-setup.h
	ln -sT ../grp-system/libcore/machine-id-setup.c src/systemd-machine-id-setup/machine-id-setup.c

	ln -sT ../subdir.mk src/libsystemd/src/sd-network/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-bus/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-event/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-login/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-resolve/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-daemon/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-netlink/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-id128/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-hwdb/Makefile
	ln -sT ../subdir.mk src/libsystemd/src/sd-device/Makefile
)

fixup_makefile() {
	sed -r \
	    -e '#### Specific complete strings #####' \
	    -e 's|\$\(CPP\) \$\(CFLAGS\) \$\(AM_CPPFLAGS\) \$\(CPPFLAGS\)|$(CPP) $(sd.ALL_CPPFLAGS)|g' \
	    -e '/^	\$\(AM_V_at\)\$\(MKDIR_P\) \$\(dir \$@\)/d' \
	    -e '#### General cases #################' \
	    -e '/^[^#	]*:/ { s|^(\s*)\S+/|\1$(outdir)/| }' \
	    -e 's|^if (.*)|ifneq ($(\1),)|' \
	    -e '/^\s*\$\(AM_(C|CPP|LD)FLAGS\b/d' \
	    -e 's|--version-script=.*/([^/]+)\.sym|--version-script=$(srcdir)/\1.sym|g'
}

breakup_zshcompletion() (
	sed_expr='
		1 {
			i #compdef %s
			d
		}
		/^case/,/^esac/ {
			/^    %s)/,/^    ;;/ {
				s/^        //p
			}
			d
		}
	'

	cd shell-completion/zsh
	read -r _ cmds < _systemd
	for cmd in $cmds; do
		printf -v cmd_sed_expr "$sed_expr" $cmd $cmd
		sed -e "$cmd_sed_expr" < _systemd > _$cmd
	done
	rm _systemd
)

run() (
	local tmp
	tmp="$(mktemp --tmpdir)"
	trap 'rm -f -- "$tmp"' EXIT
	"$0" "$@" |& tail -n20 > "$tmp" || { r=$?; cat "$tmp"; return $r; }
	return 0
)

move() (
	find . \( -name Makefile -o -name '*.mk' \) -delete

	>&2 echo ' => breakup_zshcompletion'
	run breakup_zshcompletion
	>&2 echo ' => move_files'
	run move_files
	>&2 echo ' => breakup_makefile'
	run breakup_makefile
	>&2 echo ' => ./tools/notsd-fixup'
	./tools/notsd-fixup
)

main() {
	if [[ -n "$(git status -s)" ]] || [[ -n "$(git clean -xdn)" ]]; then
		echo 'There are changes in the current directory.' >&2
		exit 1
	fi

	git checkout -b tmp/postmove

	move

	git add .
	git commit -m './tools/notsd-move'
	git merge -s ours notsystemd/postmove
	git checkout notsystemd/postmove
	git merge tmp/postmove
	git branch -d tmp/postmove
}

set -e
set -o pipefail
if [[ $# -gt 0 ]]; then
	set -x;
else
	set -- main
fi
"$@"