{ stdenv, fetchgit, busybox, squashfsTools, linuxHeaders, musl, runit }:

stdenv.mkDerivation {
	name = "rootfs-yerba";
	src = ./.;
	buildInputs = [ squashfsTools ];
	nativeBuildInputs = [ squashfsTools linuxHeaders ];
	buildPhase = ''
		# Basic setup start
		mkdir -p rootfs 
		mkdir -p rootfs/{bin,sbin,etc,proc,sys,dev,home,var,usr,root,mnt,tmp,lib}
		mkdir -p rootfs/usr/{lib,bin}
		mkdir -p rootfs/etc/runit
		mkdir -p rootfs/etc/service
		chmod -R u+w rootfs
		# Basic setup end

		# Musl start
		cp -a ${musl}/lib/* rootfs/usr/lib/
		chmod -R u+w rootfs
		ln -sf /usr/lib/ld-musl-x86_64.so.1 rootfs/lib/ld-musl-x86_64.so.1
		chmod -R u+w rootfs
		ln -sf /usr/lib/libc.so rootfs/lib/libc.so
		# Musl end

		# Busybox start
		cp -a ${busybox}/_install/. rootfs/	
		# chmod -R u+w rootfs
		# ln -sf /bin/busybox rootfs/init
		# Busybox end

		# runit start
		cp -a ${runit}/bin/* rootfs/usr/bin
		chmod -R u+w rootfs
		ln -sf usr/bin/runit-init rootfs/init 
		chmod -R u+w rootfs
		rm -f rootfs/sbin/init
		chmod -R u+w rootfs
		ln -sf usr/bin/runit-init rootfs/sbin/init	
		cp -a ${../runit}/* rootfs/etc/runit/
		chmod -R u+w rootfs
		ln -sf /etc/runit/sv/getty-tty0 rootfs/etc/service/
		chmod -R u+w rootfs
		ln -sf /etc/runit/sv/getty-ttyS0 rootfs/etc/service/
		# runit end

		# Programs start
		# nothing here yet!
		# Programs end

		# Basic files setup start
		echo "proc /proc proc defaults 0 0" > rootfs/etc/fstab
		echo "sysfs /sys sysfs defaults 0 0" >> rootfs/etc/fstab
		echo "devtmpfs /dev devtmpfs defaults 0 0" >> rootfs/etc/fstab
		echo "root:x:0:0:root:/root:/bin/sh" > rootfs/etc/passwd
		echo "root:x:0:" > rootfs/etc/group
		echo "root::0:0:root:/root:/bin/sh" > rootfs/etc/shadow
		echo "yerba-live" > rootfs/etc/hostname
		# Basic files setup end

		# Squashfs start
		mksquashfs rootfs $out -comp zstd -noappend
		# Squashfs end
	'';
	installPhase = ''
		echo "rootfs built"
	'';
}