#!/bin/rc

fn usage {
	echo 'usage: '$0' [dir]' >[1=2]
	exit 2
}

if(! ~ $#* 0 1) usage

if(! [ -f config.rc ])
	cp config.def.rc config.rc
. ./config.rc

flag e +

if(! [ -f config.ninja ])
	cp config.def.ninja config.ninja

# call this after a command capture to ensure it succeeded
fn checkstatus {}

ifs='
'

. ./ninja.rc

fn subgen {
	subninja '$dir'/$1/local.ninja
	ninja_inputs=($ninja_inputs '$dir'/$1/ninja)
	index_inputs=($index_inputs '$outdir'/$1/root.index)
	perms_inputs=($perms_inputs '$outdir'/$1/root.perms)
	if(~ $recurse 1 || ! [ -f $1/local.ninja ]) @ gen $1 &
	status=()
}

fn gen {
	pkg=`{basename $1}
	checkstatus
	if(~ $dir '' .) dir=$1
	if not dir=$dir/$1

	cd $1

	allsrcs=()
	tree_perms=()
	perms_inputs=()
	index_inputs=()
	gen_inputs=()
	ninja_inputs=()

	absdir=`{pwd}
	{
		set dir $dir
		if(~ $dir .) set outdir '$builddir'
		if not set outdir '$builddir/$dir'

		if([ -e rev ]) set srcdir '$dir'/src

		. $absdir/gen.rc

		build '$dir'/local.ninja gen '|' setup.rc config.rc ninja.rc '$dir'/gen.rc $gen_inputs
		phony ninja '$dir'/local.ninja $ninja_inputs

		if(! ~ $#tree_perms 0) {
			printf '%s\n' $tree_perms | sort -k 2 >$absdir/local.perms
			perms_inputs=($perms_inputs '$dir'/local.perms)
		}
		if(~ $#perms_inputs 0) build '$outdir/root.perms' empty
		if not build '$outdir/root.perms' mergeperms $perms_inputs
		if(~ $#index_inputs 0) build '$outdir/root.index' empty
		if not build '$outdir/root.index' cat $index_inputs
	} >local.ninja.tmp
	mv $absdir/^(local.ninja.tmp local.ninja)

	echo 'generated '$dir >[1=2]

	wait
}

if(! ~ $#* 0) {gen $1 ; exit}

recurse=1
@ gen .