#!/bin/rc -e
# sysbuild: build the system (userspace + kernel)
# options:
#   -6  build amd64 only
#       (with -k: install only amd64 kernel)
#   -8  build 386 only
#       (with -k: install only 386 kernel)
#   -k  install kernel(s) and bootloader to 9fat without building;
#       run "sysbuild -[6|8]k" after building if the kernels are
#       to be installed to 9fat
rfork e

flagfmt='6,8,k'
args=''
targets=(386 amd64)

fn usage{
	aux/usage
	exit usage
}
fn fatal{
	echo $* >[1=2]
	exit $"*
}
fn info{
	echo $* >[1=2]
}
fn mkstub{
	cd /
	. /sys/lib/rootstub
}
fn mkuser{
	objtype=$1
	cd /sys/src
	mk install
	mk clean
}
fn mkmandoc{
	cd /sys/man
	mk
	cd /sys/doc
	mk
	mk html
}
fn mkkernel{
	objtype=$1
	switch($objtype){
	case 386
		cd /sys/src/9/pc
	case amd64
		cd /sys/src/9/pc64
	case *
		fatal invalid kernel objtype
	}
	mk install
}
fn mountfat{
	bind -b '#S' /dev
	9fs 9fat
}
fn bootfat{
	src=/386/9bootfat
	dst=/n/9fat/9bootfat
	if(! test -e $src)
		fatal '9bootfat doesn''t exist'
	if(cmp $src $dst)
		info $src and $dst are the same
	if not{
		if(test -e $dst){
			bak=$dst.`{timestamp $dst}
			info copying $dst to $bak
			cp -x $dst $bak
		}
		info copying $src to $dst
		rm -f $dst
		cp $src $dst
		chmod +al $dst # defrag magic
		if(! cmp $src $dst)
			fatal copying 9bootfat failed
	}
	status=''
}
fn kernel2fat{
	objtype=$1
	switch($objtype){
	case 386
		kfile=9pc
	case amd64
		kfile=9pc64
	case *
		fatal invalid kernel objtype
	}
	src=/$objtype/$kfile
	dst=/n/9fat/$kfile
	if(! test -e $src)
		fatal 'kernel file doesn''t exist'
	if(cmp $src $dst)
		info $src and $dst are the same
	if not{
		if(test -e $dst){
			bak=$dst.`{timestamp $dst}
			info copying $dst to $bak
			cp -x $dst $bak
		}
		info copying $src to $dst
		cp $src $dst
		if(! cmp $src $dst)
			fatal copying kernel failed
	}
	status=''
}
fn timestamp{
	ls -l $1 | awk 'BEGIN { OFS="_" } { print $7, $8, $9 }'
}

if(! ifs=() eval `{aux/getflags $*})
	usage

if(~ $#flag6 1){
	info amd64 only
	targets=amd64
}
if(~ $#flag8 1){
	info 386 only
	targets=386
}
if(~ $#flagk 1){
	info 'installing kernel(s) and bootloader'
	mountfat
	bootfat
	for(t in $targets)
		kernel2fat $t
	info 'install done; edit /n/9fat/plan9.ini if needed'
	exit
}

info building
mkstub
for(t in $targets)
	mkuser $t
mkmandoc
for(t in $targets)
	mkkernel $t
o=''
if(~ $#flag6 1)
	o=6
if(~ $#flag8 1)
	o=8
info 'build done;
run sysbuild -'$o'k to install the kernel(s) and bootloader to 9fat if needed'