# $Id$
VERSION := @VERSION@
DIR := @DIR@
ROOT := @DIR@/root
NEEDROOT := @NEEDROOT@

CPU := $(shell nproc)

MUSL := $(ROOT)/usr/include/stdio.h
MUSLDIR := ./src/musl

INIT := $(ROOT)/sbin/init
INITDIR := ./src/cinit

LOGIN := $(ROOT)/bin/login
LOGINDIR := ./src/clogin

GETTY := $(ROOT)/bin/getty
GETTYDIR := ./src/cgetty

MOUNT := $(ROOT)/bin/mount
MOUNTDIR := ./src/cmount

OKSH := $(ROOT)/bin/sh
OKSHDIR := ./src/oksh

NASHVILLE := $(ROOT)/bin/nv
NASHVILLEDIR := ./src/nashville

.PHONY: default clean

default: ./linux.iso

$(MUSL):
	make -C $(MUSLDIR) -j$(CPU) && make -C $(MUSLDIR) install

$(INIT):	$(MUSL)
	make -C $(INITDIR) -j$(CPU)
	mkdir -p $(ROOT)/sbin
	cp $(INITDIR)/bin/cinit $(ROOT)/sbin/init
	cp $(INITDIR)/bin/cshutdown $(ROOT)/sbin/shutdown

$(GETTY):	$(MUSL)
	make -C $(GETTYDIR) -j$(CPU)
	mkdir -p $(ROOT)/bin
	cp $(GETTYDIR)/bin/cgetty $(ROOT)/bin/getty

$(LOGIN):	$(MUSL)
	make -C $(LOGINDIR) -j$(CPU)
	mkdir -p $(ROOT)/bin
	cp $(LOGINDIR)/bin/clogin $(ROOT)/bin/login

$(MOUNT):	$(MUSL)
	make -C $(MOUNTDIR) -j$(CPU)
	mkdir -p $(ROOT)/bin
	cp $(MOUNTDIR)/bin/cmount $(ROOT)/bin/mount
	cp $(MOUNTDIR)/bin/cumount $(ROOT)/bin/umount

$(OKSH):	$(MUSL)
	make -C $(OKSHDIR) -j$(CPU)
	mkdir -p $(ROOT)/bin
	cp $(OKSHDIR)/oksh $(ROOT)/bin/sh

$(NASHVILLE):	$(MUSL)
	make -C $(NASHVILLEDIR) -j$(CPU) SYSUTILS=NO
	mkdir -p $(ROOT)/bin
	cp $(NASHVILLEDIR)/bin/nashville $(ROOT)/bin/nv

./linux.iso:	$(MUSL) \
		$(INIT) \
		$(LOGIN) \
		$(OKSH) \
		$(GETTY) \
		$(MOUNT) \
		$(NASHVILLE) \
		./files/getty-wrapper \
		./files/isolinux.cfg \
		./files/inittab \
		./files/startup \
		./files/issue \
		./bzImage
	mkdir -p $(ROOT)/isolinux
	mkdir -p $(ROOT)/etc
	mkdir -p $(ROOT)/sys
	mkdir -p $(ROOT)/proc
	mkdir -p $(ROOT)/run
	mkdir -p $(ROOT)/dev
	-$(NEEDROOT) groupadd -R $(ROOT) -g 0 root
	-$(NEEDROOT) useradd -R $(ROOT) -g 0 -u 0 -d /root -s /bin/sh root
	-echo "root:`mkpasswd root`:0::::::" > $(ROOT)/etc/shadow
	-rm $(ROOT)/lib
	ln -sf /usr/lib $(ROOT)/lib
	ln -sf libc.so $(ROOT)/usr/lib/ld-musl-x86_64.so.1
	cp ./bzImage $(ROOT)/
	cp /usr/share/syslinux/isolinux.bin $(ROOT)/isolinux/
	cp /usr/share/syslinux/ldlinux.c32 $(ROOT)/isolinux/
	cp /usr/share/syslinux/libutil.c32 $(ROOT)/isolinux/
	cp /usr/share/syslinux/libcom32.c32 $(ROOT)/isolinux/
	cp /usr/share/syslinux/menu.c32 $(ROOT)/isolinux/
	cp /usr/share/syslinux/vesamenu.c32 $(ROOT)/isolinux/
	cp ./files/isolinux.cfg $(ROOT)/isolinux/
	cp ./files/inittab $(ROOT)/etc/
	cp ./files/issue $(ROOT)/etc/
	cp ./files/startup $(ROOT)/
	chmod +x $(ROOT)/startup
	cp ./files/getty-wrapper $(ROOT)/bin/
	chmod +x $(ROOT)/bin/getty-wrapper
	-strip $(ROOT)/bin/* $(ROOT)/sbin/* $(ROOT)/usr/lib/*
	xorriso -as mkisofs -r -o $@ -isohybrid-mbr /usr/share/syslinux/isohdpfx.bin -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table $(ROOT)

clean:
	rm -rf $(ROOT)