# $Id$
CC := cc
CFLAGS := -g
ROOT := ./isoroot
DASH_VERSION := 0.5.12
BASH_VERSION := 5.2.15
NCURSES_VERSION := 6.4
GETTEXT_VERSION := 0.22.3
MUSL_VERSION := 1.2.4
BINUTILS_VERSION := 2.41
TCSH_VERSION := 6.24.10
CPU := $(shell nproc)
DATE := $(shell LC_ALL=C.UTF-8 date)

.PHONY: all clean

all: ./linux.iso

$(ROOT)/bin/dash:
	if [ ! -e "dash-$(DASH_VERSION).tar.gz" ]; then wget -O dash-$(DASH_VERSION).tar.gz https://git.kernel.org/pub/scm/utils/dash/dash.git/snapshot/dash-$(DASH_VERSION).tar.gz ; fi
	if [ ! -e "dash-$(DASH_VERSION)" ]; then tar xvf dash-$(DASH_VERSION).tar.gz ; fi
	cd dash-$(DASH_VERSION) && ./autogen.sh && export CFLAGS="-static" && ./configure --exec-prefix=$(shell pwd)/$(ROOT)/ --prefix=/ && make -j$(CPU) && make install

$(ROOT)/usr/bin/oksh:
	if [ ! -e "oksh" ]; then git clone https://github.com/ibara/oksh ; fi
	cd oksh && ./configure --exec-prefix=/usr --prefix=$(shell pwd)/$(ROOT)/usr && make -j$(CPU) && make install

$(ROOT)/bin/tcsh:
	if [ ! -e "tcsh-$(TCSH_VERSION).tar.gz" ]; then wget -O tcsh-$(TCSH_VERSION).tar.gz https://astron.com/pub/tcsh/tcsh-6.24.10.tar.gz ; fi
	if [ ! -e "tcsh-$(TCSH_VERSION)" ]; then tar xvf tcsh-$(TCSH_VERSION).tar.gz ; fi
	cd tcsh-$(TCSH_VERSION) && if [ ! -e "Makefile" ]; then ./configure --exec-prefix=$(shell pwd)/$(ROOT)/usr --prefix=/usr ; fi
	cd tcsh-$(TCSH_VERSION) && make -j$(CPU) && make install 

$(ROOT)/bin/bash:
	if [ ! -e "bash-$(BASH_VERSION).tar.gz" ]; then wget -O bash-$(BASH_VERSION).tar.gz http://ftp.gnu.org/gnu/bash/bash-$(BASH_VERSION).tar.gz ; fi
	if [ ! -e "bash-$(BASH_VERSION)" ]; then tar xvf bash-$(BASH_VERSION).tar.gz ; fi
	cd bash-$(BASH_VERSION) && ./configure --disable-nls --exec-prefix=$(shell pwd)/$(ROOT)/ --prefix=/ && make -j$(CPU) && make install

$(ROOT)/usr/bin/pcc:
	if [ ! -e "pcc" ]; then cvs -d :pserver:anonymous@pcc.ludd.ltu.se:/cvsroot co pcc ; fi
	mkdir -p $(ROOT)/usr/bin
	cd pcc && ./configure --exec-prefix=$(shell pwd)/$(ROOT)/usr --prefix=/usr && make -j$(CPU) && make install

$(ROOT)/lib/libpam.so:
	if [ ! -e "pam" ]; then git clone https://github.com/linux-pam/linux-pam pam ; fi
	mkdir -p $(ROOT)/lib
	cd pam && if [ ! -e ./configure ]; then ./autogen.sh ; fi
	cd pam && if [ ! -e Makefile ]; then ./configure --disable-doc --exec-prefix=$(shell pwd)/$(ROOT)/ --prefix=$(shell pwd)/$(ROOT)/ ; fi
	cd pam && make && make install

$(ROOT)/usr/lib/libintl.so:
	if [ ! -e "gettext-$(GETTEXT_VERSION).tar.gz" ]; then wget -O gettext-$(GETTEXT_VERSION).tar.gz http://ftp.gnu.org/gnu/gettext/gettext-$(GETTEXT_VERSION).tar.gz ; fi
	if [ ! -e "gettext-$(GETTEXT_VERSION)" ]; then tar xvf gettext-$(GETTEXT_VERSION).tar.gz ; fi
	cd gettext-$(GETTEXT_VERSION) && ./configure --exec-prefix=$(shell pwd)/$(ROOT)/usr --prefix=/usr --with-shared -without-debug && make -j$(CPU) && make install

$(ROOT)/usr/lib/libncursesw.so:
	if [ ! -e "ncurses-$(NCURSES_VERSION).tar.gz" ]; then wget -O ncurses-$(NCURSES_VERSION).tar.gz http://ftp.gnu.org/gnu/ncurses/ncurses-$(NCURSES_VERSION).tar.gz ; fi
	if [ ! -e "ncurses-$(NCURSES_VERSION)" ]; then tar xvf ncurses-$(NCURSES_VERSION).tar.gz ; fi
	cd ncurses-$(NCURSES_VERSION) && ./configure --enable-termcap --exec-prefix=$(shell pwd)/$(ROOT)/usr --prefix=/usr --with-shared -without-debug --enable-widec && make -j$(CPU) && make install

$(ROOT)/sbin/getty: ./getty.c
	mkdir -p $(ROOT)/sbin
	cc -o $@ $<

$(ROOT)/sbin/cgetty:
	if [ ! -e "cgetty" ]; then svn co http://sw.nishi.boats/sw/~nishi/cgetty/trunk cgetty ; fi
	cd cgetty && make -j$(CPU) && cp bin/cgetty ../$(ROOT)/sbin/cgetty

$(ROOT)/bin/clogin:
	if [ ! -e "clogin" ]; then svn co http://sw.nishi.boats/sw/~nishi/clogin/trunk clogin ; fi
	cd clogin && make -j$(CPU) && cp bin/clogin ../$(ROOT)/bin/clogin

$(ROOT)/bin/nv:
	svn co http://sw.nishi.boats/sw/~nishi/nashville/trunk nv
	cd nv && make STATIC=YES -j$(CPU) && cp bin/nashville ../$(ROOT)/bin/nv

$(ROOT)/usr/include/stdio.h:
	if [ ! -e "musl.tar.gz" ]; then wget -O musl.tar.gz https://musl.libc.org/releases/musl-$(MUSL_VERSION).tar.gz ; fi
	if [ ! -e "musl-$(MUSL_VERSION)" ]; then tar xvf musl.tar.gz ; fi
	mkdir -p $(ROOT)/usr/include
	cd musl-$(MUSL_VERSION) && ./configure --disable-doc --exec-prefix=$(shell pwd)/$(ROOT)/usr --prefix=$(shell pwd)/$(ROOT)/usr
	cd musl-$(MUSL_VERSION) && make -j$(CPU) && make install

$(ROOT)/usr/sbin/dhclient:
	if [ ! -e "isc-dhcp" ]; then git clone https://github.com/isc-projects/dhcp isc-dhcp ; fi
	cd isc-dhcp && if [ ! -e "Makefile" ]; then ./configure --exec-prefix=$(shell pwd)/$(ROOT)/usr --prefix=$(shell pwd)/$(ROOT)/usr ; fi
	cd isc-dhcp && make -j$(CPU) && make install

$(ROOT)/usr/sbin/dhcpcd:
	if [ ! -e "dhcpcd" ]; then git clone https://github.com/NetworkConfiguration/dhcpcd ; fi
	cd dhcpcd && ./configure --exec-prefix=/usr --prefix=$(shell pwd)/$(ROOT)/usr --etcdir=/etc
	cd dhcpcd && make -j$(CPU) && make install

root:
	mkdir -p $(ROOT)/bin
	mkdir -p $(ROOT)/dev/pts
	mkdir -p $(ROOT)/dev/shm
	mkdir -p $(ROOT)/proc
	mkdir -p $(ROOT)/sys
	mkdir -p $(ROOT)/run
	umount $(ROOT)/dev/pts || exit 0
	umount $(ROOT)/dev || exit 0
	umount $(ROOT)/proc || exit 0
	umount $(ROOT)/sys || exit 0
	umount $(ROOT)/run || exit 0
	mount -v --bind /dev $(ROOT)/dev
	mount -v --bind /dev/pts $(ROOT)/dev/pts
	mount -vt proc proc $(ROOT)/proc
	mount -vt sysfs sysfs $(ROOT)/sys
	mount -vt tmpfs tmpfs $(ROOT)/run
	mkdir -p $(ROOT)/etc
	if [ -h $(ROOT)/dev/shm ]; then mkdir -pv $(ROOT)/dev/shm ; fi

./$(ROOT)/sbin/init:
	if [ ! -e "cinit" ]; then svn co http://sw.nishi.boats/sw/~nishi/cinit/trunk cinit ; fi
	cd cinit && make -j$(CPU) && cp bin/cinit ../$(ROOT)/sbin/init

./$(ROOT)/etc/tcshrc:
	wget -O $@ http://nishi.boats/pub/tcshrc

./$(ROOT)/bzImage:
	wget -O $@ https://ftp.riken.jp/Linux/slackware/slackware64-15.0/kernels/huge.s/bzImage

./modules.txz:
	wget -O $@ https://mirrors.slackware.com/slackware/slackware64-15.0/slackware64/a/kernel-modules-5.15.19-x86_64-2.txz
	tar xvJf $@ -C $(ROOT)

./linux.iso:	root \
		$(ROOT)/bzImage \
		./dist/limine.cfg \
		./dist/inittab \
		./dist/rc.subr \
		./dist/fetch \
		./dist/rc.proc \
		./dist/init.d/rc \
		./dist/issue \
		./dist/udhcpc.script \
		./dist/hostname \
		./dist/rc.conf \
		/bin/busybox \
		./modules.txz \
		$(ROOT)/etc/tcshrc \
		$(ROOT)/lib/libpam.so \
		$(ROOT)/usr/lib/libintl.so \
		$(ROOT)/usr/lib/libncursesw.so \
		$(ROOT)/usr/bin/pcc \
		$(ROOT)/bin/nv \
		$(ROOT)/sbin/init \
		$(ROOT)/sbin/getty \
		$(ROOT)/bin/tcsh \
		$(ROOT)/usr/include/stdio.h \
		$(ROOT)/usr/bin/oksh \
		$(ROOT)/bin/clogin \
		./dist/dhclient-script \
		$(ROOT)/usr/sbin/dhcpcd \
		$(ROOT)/sbin/cgetty \
#		$(ROOT)/usr/sbin/dhclient
#		ISC dhcp is removed ; just use udhcpc or dhcpcd
#
#		$(ROOT)/bin/bash
#		Never works fine.
#
#		$(ROOT)/sbin/mingetty
#		Replaced with Cgetty.
	umount $(ROOT)/dev/pts || exit 0
	umount $(ROOT)/dev || exit 0
	umount $(ROOT)/proc || exit 0
	umount $(ROOT)/sys || exit 0
	umount $(ROOT)/run || exit 0
	mkdir -p $(ROOT)/boot/grub
	mkdir -p $(ROOT)/etc
	mkdir -p $(ROOT)/etc/init.d
	mkdir -p $(ROOT)/etc/rcS.d
	mkdir -p $(ROOT)/etc/rc1.d/
	mkdir -p $(ROOT)/etc/rc2.d/
	mkdir -p $(ROOT)/etc/rc3.d/
	mkdir -p $(ROOT)/etc/rc4.d/
	mkdir -p $(ROOT)/etc/rc5.d/
	mkdir -p $(ROOT)/etc/rc6.d/
	cp ./dist/init.d/* $(ROOT)/etc/init.d/
	cp ./dist/rcS.d/* $(ROOT)/etc/rcS.d/
	cp ./dist/rc1.d/* $(ROOT)/etc/rc1.d/
	cp ./dist/rc2.d/* $(ROOT)/etc/rc2.d/
	cp ./dist/rc3.d/* $(ROOT)/etc/rc3.d/
	cp ./dist/rc4.d/* $(ROOT)/etc/rc4.d/
	cp ./dist/rc5.d/* $(ROOT)/etc/rc5.d/
	cp ./dist/rc6.d/* $(ROOT)/etc/rc6.d/
	cp ./dist/rc.subr $(ROOT)/etc/
	cp ./dist/rc.proc $(ROOT)/etc/
	cp ./dist/rc.conf $(ROOT)/etc/
	cp ./dist/fetch $(ROOT)/bin/fetchinfo
	chmod +x $(ROOT)/bin/fetchinfo
	chmod +x $(ROOT)/etc/rc.subr
	chmod +x $(ROOT)/etc/rc.proc
	chmod +x $(ROOT)/etc/rc.conf
	cp ./dist/issue $(ROOT)/etc/
	cp ./dist/dhclient-script $(ROOT)/sbin/
	chmod +x $(ROOT)/sbin/dhclient-script
	mkdir -p $(ROOT)/etc/pam.d
	mkdir -p $(ROOT)/var/run
	mkdir -p $(ROOT)/usr/share/udhcpc
	cp ./dist/udhcpc.script $(ROOT)/usr/share/udhcpc/default.script
	chmod +x $(ROOT)/usr/share/udhcpc/default.script
	cp ./dist/pam.d/* $(ROOT)/etc/pam.d/
	mkdir -p $(ROOT)/usr/share/terminfo
	mkdir -p $(ROOT)/tmp
	ln -sf /bin/busybox $(ROOT)/bin/login
	cp -f /bin/busybox $(ROOT)/bin/
	cp -f /usr/lib/libgcc* $(ROOT)/usr/lib/
	cp ./dist/pam.d/* $(ROOT)/etc/pam.d/
	mkdir -p $(ROOT)/usr/share/terminfo
	mkdir -p $(ROOT)/tmp
	ln -sf /bin/clogin $(ROOT)/bin/login
	ln -sf /bin/busybox $(ROOT)/bin/mkdir
	ln -sf /usr/bin/tcsh $(ROOT)/bin/tcsh
	ln -sf /bin/busybox $(ROOT)/sbin/swapoff
	ln -sf /bin/busybox $(ROOT)/sbin/umount
	cp -f /bin/busybox $(ROOT)/bin/
	cp -rf /usr/share/terminfo/* $(ROOT)/usr/share/terminfo/
	chmod +x $(ROOT)/etc/init.d/*
	chmod +x $(ROOT)/etc/rc?.d/*
	printf "\x1b[m" > $(ROOT)/bootmotd
	printf "   Booting \x1b[1m\x1b[31mScarlet\x1b[m \x1b[1mNashville+BB/Linux\x1b[m \x1b[1m\x1b[33mBuild $(DATE)\x1b[m\n" >> $(ROOT)/bootmotd
	printf "      - Homebrew Linux Distro!\n" >> $(ROOT)/bootmotd
	cp ./bzImage isoroot/
	cp ./dist/limine.cfg isoroot/
	cp ./dist/inittab isoroot/etc/
	cd ./nv/src && for i in `ls *.c`; do \
		if [ "main.c" = "$$i" ]; then \
			continue; \
		fi; \
		ln -sf /bin/nv ../../$(ROOT)/bin/`echo $$i | sed "s/\.c//g"`; \
	done
	cp /lib/ld-musl* $(ROOT)/lib/
	useradd -R $(shell pwd)/$(ROOT) -g 0 -u 0 -p root -s /bin/sh -d /root root || exit 0
	groupadd -R $(shell pwd)/$(ROOT) -g 0 root || exit 0
	echo "root:`mkpasswd root`:0::::::" > $(ROOT)/etc/shadow
	ln -sf /usr/bin/oksh $(ROOT)/bin/sh
	ln -sf /bin/busybox $(ROOT)/bin/ls
	ln -sf /bin/busybox $(ROOT)/sbin/mdev
	ln -sf /bin/busybox $(ROOT)/sbin/ifconfig
	ln -sf /bin/busybox $(ROOT)/sbin/ip
	ln -sf /bin/busybox $(ROOT)/sbin/route
	ln -sf /bin/busybox $(ROOT)/sbin/modprobe
	ln -sf /bin/busybox $(ROOT)/sbin/udhcpc
	ln -sf /bin/busybox $(ROOT)/sbin/ifup
	ln -sf /bin/busybox $(ROOT)/sbin/ifdown
	ln -sf /bin/busybox $(ROOT)/sbin/run-parts
	ln -sf /bin/busybox $(ROOT)/bin/grep
	ln -sf /bin/busybox $(ROOT)/bin/sed
	ln -sf /bin/busybox $(ROOT)/sbin/ping
	ln -sf /bin/busybox $(ROOT)/bin/mv
	mkdir -p $(ROOT)/lib
	mkdir -p $(ROOT)/root
	mkdir -p $(ROOT)/boot
	cp -rf $(ROOT)/share/* $(ROOT)/usr/share/
	cp ./dist/hostname $(ROOT)/etc/
	mkdir -p efi
	cp ./dist/sdm.jpg $(ROOT)/
	fallocate -l 32m $(ROOT)/efi.img
	losetup /dev/loop0 $(ROOT)/efi.img
	mkfs.vfat /dev/loop0
	mount -t vfat /dev/loop0 efi
	mkdir -p efi/efi/boot
	mkdir -p efi/boot
	mkdir -p efi/icons
	cp -rf /usr/share/refind/icons/* efi/icons/
	cp ./dist/sdm.png efi/
	cp /usr/share/refind/refind_x64.efi efi/efi/boot/bootx64.efi
	cp dist/refind.conf efi/efi/boot/refind.conf
	cp $(ROOT)/bzImage efi/
	umount efi
	losetup -d /dev/loop0
	cp /usr/share/limine/limine-bios-cd.bin $(ROOT)/limine-bios-cd.bin
	cp /usr/share/limine/limine-uefi-cd.bin $(ROOT)/limine-uefi-cd.bin
	cp dist/elilo.efi $(ROOT)/
	cp /usr/share/limine/limine-bios.sys $(ROOT)/
	chroot $(ROOT) /bin/busybox chown -R 0:0 .
	rm -f $@
	xorriso -as mkisofs -b limine-bios-cd.bin -no-emul-boot -boot-load-size 4 -boot-info-table --efi-boot efi.img -efi-boot-part --efi-boot-image --protective-msdos-label -o $@ $(ROOT)
	limine bios-install $@

clean:
	umount $(ROOT)/dev/pts || exit 0
	umount $(ROOT)/dev || exit 0
	umount $(ROOT)/proc || exit 0
	umount $(ROOT)/sys || exit 0
	umount $(ROOT)/run || exit 0
	rm -f ./linux.iso
	rm -rf isoroot