#!/bin/sh
# Everest Linux 1.0.0-busybox - Stage 3 Installation Script
# This program is free software: See the GNU GPL v3.0 for details.

printf "[ i ] NOTICE - This script can either be run as the 'everest' user (assuming they own /mnt/everest), or as root.\n"
	sleep 5

printf "[ i ] Creating sysroot directory...\n"
	mkdir -p ${EVEREST}/cross-tools/${EVEREST_TARGET}
	ln -sfv . ${EVEREST}/cross-tools/${EVEREST_TARGET}/usr

printf "[ i ] Moving tarballs to cross-tools directory...\n"
	cd /home/everest/everest-install/scripts/tempfiles
	mv -rv * $EVEREST/sources

printf "[ i ] Preparing to build initial toolchain...\n"
	cd $EVEREST/sources

printf "[ i ] Starting build of >>> Linux-Headers-4.9.22 <<<\n"
	sleep 3
	tar -xvf linux-4.9.22.tar.xz
	cd linux-4.9.22
	make mrproper
	make ARCH=${EVEREST_ARCH} headers_check
	make ARCH=${EVEREST_ARCH} INSTALL_HDR_PATH=${EVEREST}/cross-tools/${EVEREST_TARGET} headers_install
	cd ..
	
printf "[ i ] Starting build of >>> Binutils-2.27 <<<\n"
	sleep 3
	tar -xvf binutils-2.27.tar.bz2
	cd binutils-2.27
	mkdir -v ../binutils-build
	cd ../binutils-build
	../binutils-2.27/configure \
   		--prefix=${EVEREST}/cross-tools \
   		--target=${EVEREST_TARGET} \
   		--with-sysroot=${EVEREST}/cross-tools/${EVEREST_TARGET} \
   		--disable-nls \
   		--disable-multilib
	make configure-host
	make
	make install
	cd ../..
printf "[ i ] Finished build of >>> Binutils-2.27 <<<\n"

printf "[ i ] Starting build of >>> GCC-6.2.0 - Static <<<\n"
	sleep 3
	tar -xvf gcc-6.2.0.tar.bz2
	cd gcc-6.2.0
	tar xf ../mpfr-3.1.4.tar.bz2
	mv -v mpfr-3.1.4 mpfr
	tar xf ../gmp-6.1.1.tar.bz2
	mv -v gmp-6.1.1 gmp
	tar xf ../mpc-1.0.3.tar.gz
	mv -v mpc-1.0.3 mpc
	mkdir -v ../gcc-build
	cd ../gcc-build
	../gcc-6.2.0/configure \
  		--prefix=${EVEREST}/cross-tools \
  		--build=${EVEREST_HOST} \
  		--host=${EVEREST_HOST} \
  		--target=${EVEREST_TARGET} \
  		--with-sysroot=${EVEREST}/cross-tools/${EVEREST_TARGET} \
  		--disable-nls  \
  		--disable-shared \
  		--without-headers \
  		--with-newlib \
  		--disable-decimal-float \
  		--disable-libgomp \
  		--disable-libmudflap \
  		--disable-libssp \
  		--disable-libatomic \
  		--disable-libquadmath \
  		--disable-threads \
  		--enable-languages=c \
  		--disable-multilib \
  		--with-mpfr-include=$(pwd)/../gcc-6.2.0/mpfr/src \
  		--with-mpfr-lib=$(pwd)/mpfr/src/.libs \
  		--with-arch=${EVEREST_CPU}
	make all-gcc all-target-libgcc
	make install-gcc install-target-libgcc
	cd ..
	rm -rf gcc-build
	cd ..
printf "[ i ] Finished build of >>> GCC-6.2.0 - Static <<<\n"

printf "[ i ] Starting build of >>> musl-1.1.16 <<<\n"
	sleep 3
	tar -xvf musl-1.1.16.tar.gz
	cd musl-1.1.16
	./configure \
  		CROSS_COMPILE=${EVEREST_TARGET}- \
  		--prefix=/ \
  		--target=${EVEREST_TARGET}
	make
	DESTDIR=${EVEREST}/cross-tools/${EVEREST_TARGET} make install
	cd ..
printf "[ i ] Finished build of >>> musl-1.1.16 <<<\n"

printf "[ i ] Starting build of >>> GCC-6.2.0 - Final <<<\n"
	sleep 3
	rm -rf gcc-6.2.0
	tar -xvf gcc-6.2.0.tar.bz2
	cd gcc-6.2.0
	tar xf ../mpfr-3.1.4.tar.bz2
	mv -v mpfr-3.1.4 mpfr
	tar xf ../gmp-6.1.1.tar.bz2
	mv -v gmp-6.1.1 gmp
	tar xf ../mpc-1.0.3.tar.gz
	mv -v mpc-1.0.3 mpc
	mkdir -v ../gcc-build
	cd ../gcc-build
	../gcc-6.2.0/configure \
  		--prefix=${EVEREST}/cross-tools \
  		--build=${EVEREST_HOST} \
  		--host=${EVEREST_HOST} \
  		--target=${EVEREST_TARGET} \
  		--with-sysroot=${EVEREST}/cross-tools/${EVEREST_TARGET} \
  		--disable-nls \
  		--enable-languages=c,c++ \
  		--enable-c99 \
  		--enable-long-long \
  		--disable-libmudflap \
  		--disable-multilib \
  		--with-mpfr-include=$(pwd)/../gcc-6.2.0/mpfr/src \
  		--with-mpfr-lib=$(pwd)/mpfr/src/.libs \
  		--with-arch=${EVEREST_CPU}
	make
	make install
	cd ..
printf "[ i ] Finished build of >> GCC-6.2.0 - Final <<<\n"

printf "[ i ] Toolchain has finished building.\n"

printf "[ i ] Setting toolchain variables...\n"
	echo export CC=\""${EVEREST_TARGET}-gcc --sysroot=${EVEREST}/targetfs\"" >> ~/.bashrc
	echo export CXX=\""${EVEREST_TARGET}-g++ --sysroot=${EVEREST}/targetfs\"" >> ~/.bashrc
	echo export AR=\""${EVEREST_TARGET}-ar\"" >> ~/.bashrc
	echo export AS=\""${EVEREST_TARGET}-as\"" >> ~/.bashrc
	echo export LD=\""${EVEREST_TARGET}-ld --sysroot=${EVEREST}/targetfs\"" >> ~/.bashrc
	echo export RANLIB=\""${EVEREST_TARGET}-ranlib\"" >> ~/.bashrc
	echo export READELF=\""${EVEREST_TARGET}-readelf\"" >> ~/.bashrc
	echo export STRIP=\""${EVEREST_TARGET}-strip\"" >> ~/.bashrc
	source ~/.bashrc

printf "[ i ] Starting build of system...\n"
	sleep 3

printf "[ i ] Creating system directories...\n"
	mkdir -pv ${EVEREST}/targetfs/{bin,boot,dev,etc,home,lib/{firmware,modules}}
	mkdir -pv ${EVEREST}/targetfs/{mnt,opt,proc,sbin,srv,sys}
	mkdir -pv ${EVEREST}/targetfs/var/{cache,lib,local,lock,log,opt,run,spool}
	install -dv -m 0750 ${EVEREST}/targetfs/root
	install -dv -m 1777 ${EVEREST}/targetfs/{var/,}tmp
	mkdir -pv ${EVEREST}/targetfs/usr/{,local/}{bin,include,lib,sbin,share,src}
	ln -svf ../proc/mounts ${EVEREST}/targetfs/etc/mtab
	cat > ${EVEREST}/targetfs/etc/passwd << "EOF"
	root::0:0:root:/root:/bin/ash
EOF
	cat > ${EVEREST}/targetfs/etc/group << "EOF"
	root:x:0:
	bin:x:1:
	sys:x:2:
	kmem:x:3:
	tty:x:4:
	tape:x:5:
	daemon:x:6:
	floppy:x:7:
	disk:x:8:
	lp:x:9:
	dialout:x:10:
	audio:x:11:
	video:x:12:
	utmp:x:13:
	usb:x:14:
	cdrom:x:15:
EOF
	touch ${EVEREST}/targetfs/var/log/lastlog
	chmod -v 664 ${EVEREST}/targetfs/var/log/lastlog

printf "[ i ] Starting build of >>> libgcc-6.2.0 <<<\n"
	cp -v ${EVEREST}/cross-tools/${EVEREST_TARGET}/lib/libgcc_s.so.1 ${EVEREST}/targetfs/lib/
	${EVEREST_TARGET}-strip ${EVEREST}/targetfs/lib/libgcc_s.so.1
printf "[ i ] Finished build of >>> libgcc-6.2.0 <<<\n"
	sleep 1

printf "[ i ] Starting build of >>> musl-1.1.16 <<<\n"
	rm -rf musl-1.1.16
	tar -xvf musl-1.1.16.tar.gz
	cd musl-1.1.16
	./configure \
  		CROSS_COMPILE=${EVEREST_TARGET}- \
  		--prefix=/ \
  		--disable-static \
  		--target=${EVEREST_TARGET}
	make
	DESTDIR=${EVEREST}/targetfs make install-libs
	cd ..
printf "[ i ] Finished build of >>> musl-1.1.16 <<<\n"
	sleep 1

printf "[ i ] Starting build of >>> busybox-1.24.2 <<<\n"
	tar -xvf busybox-1.24.2.tar.bz2
	cd busybox-1.24.2
	make distclean
	make ARCH="${EVEREST_ARCH}" defconfig
	sed -i 's/\(CONFIG_\)\(.*\)\(INETD\)\(.*\)=y/# \1\2\3\4 is not set/g' .config
	sed -i 's/\(CONFIG_IFPLUGD\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_FEATURE_WTMP\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_FEATURE_UTMP\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_UDPSVD\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_TCPSVD\)=y/# \1 is not set/' .config
	make ARCH="${EVEREST_ARCH}" CROSS_COMPILE="${EVEREST_TARGET}-"
	make ARCH="${EVEREST_ARCH}" CROSS_COMPILE="${EVEREST_TARGET}-"\
	CONFIG_PREFIX="${EVEREST}/targetfs" install
	cp -v examples/depmod.pl ${EVEREST}/cross-tools/bin
	chmod -v 755 ${EVEREST}/cross-tools/bin/depmod.pl
	cd ..
printf "[ i ] Finished build of >>> busybox-1.24.2 <<<\n"
	sleep 1

printf "[ i ] Starting build of >>> iana-etc-2.30 <<<\n"
	tar -xvf iana-etc-2.30.tar.bz2
	cd iana-etc-2.30
	patch -Np1 -i ../iana-etc-2.30-update-2.patch
	make get
	make STRIP=yes
	make DESTFIR=${EVEREST}/targetfs install
printf "[ i ] Finished build of >>> iana-etc-2.30 <<<\n"
	sleep 1

printf "[ i ] Finished building system software\n"
	sleep 1

printf "[ i ] Creating /etc/fstab...\n"
	cat > ${EVEREST}/targetfs/etc/fstab << "EOF"
	# file-system  mount-point  type   options          dump  fsck
EOF

printf "[ i ] Building the Linux kernel...\n"
	rm -rf linux-4.9.22
	tar -xvf linux-4.9.22.tar.xz
	cd linux-4.9.22
	make mrproper
	printf "[ !!! ] WARNING!!! KERNEL INSTALLATION WILL COMMENCE ONCE MENUCONFIG IS EXITED BY THE USER!!!\n"
	wait 5
	make ARCH=${EVEREST_ARCH} CROSS_COMPILE=${EVEREST_TARGET}- menuconfig
	make ARCH=${EVEREST_ARCH} CROSS_COMPILE=${EVEREST_TARGET}-
	make ARCH=${EVEREST_ARCH} CROSS_COMPILE=${EVEREST_TARGET}- \
    		INSTALL_MOD_PATH=${EVEREST}/targetfs modules_install
printf "[ i ] Finished build of the Linux kernel...\n"

printf "[ i ] NOTE: Bootloader will need to be installed manually by the user (unless utilizing the bootloader of another system)\n"
printf "[ i ] GRUB can be installed through Glacier.\n"
	wait 3

printf "[ i ] Bootstrapping Glacier package management system...\n"
	cd ${EVEREST}/tmp
	git clone https://git.everestlinux.org/EverestLinux/glacier
	cd install
	tar xvf glacier.tar.gz
	cd src
	chmod +x INSTALL.sh
	./INSTALL.sh
	cd ${EVEREST}/sources

printf "[ i ] Setting up bootscripts...\n"
	tar -xvf master.tar.gz
	cd bootscripts-embedded-master
	make DESTDIR=${EVEREST}/targetfs install-bootscripts
	
printf "[ i ] Creating system files...\n"
printf "[ i ] It may be a good idea to review the following files after this script finishes:\n"
printf "	/etc/mdev.conf\n"
printf "	/etc/profile\n"
printf "	/etc/inittab\n"
printf "	/etc/hostname\n"
printf "	/etc/hosts\n"

	cd /home/everest/everest-install/scripts/sysfiles
	cp mdev ${EVEREST}/targetfs/etc/mdev.conf
	cp profile ${EVEREST}/targetfs/etc/profile
	cp inittab ${EVEREST}/targetfs/etc/inittab
	cp hostname ${EVEREST}/targetfs/etc/hostname
	cp hosts ${EVEREST}/targetfs/etc/hosts
	mkdir -pv ${EVEREST}/targetfs/etc/network/if-{post-{up,down},pre-{up,down},up,down}.d
	mkdir -pv ${EVEREST}/targetfs/usr/share/udhcpc

	cat > ${EVEREST}/targetfs/etc/network/interfaces << "EOF"
	auto eth0
	iface eth0 inet dhcp
EOF
	cp default.script ${EVEREST}/targetfs/usr/share/udhcpc/default.script
	chmod +x ${EVEREST}/targetfs/usr/share/udhcpc/default.script