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#!/bin/rc
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. defs
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while()
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{
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div=--------------------------------------
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echo
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echo $div
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echo
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echo -n 'Preparing menu...'
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# must be topologically sorted (by prereq)
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tasks=(\
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	configfs\
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	partdisk prepdisk\
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	fmtfossil\
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	mountfs\
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	configdist\
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	confignet\
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	mountdist\
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	fmtventi\
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	download\
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	copydist\
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	bootsetup finish stop\
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	stopether stopppp\
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)
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#	startether startppp stopether stopppp download\
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# these don't show up in the menu but still matter
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pseudotasks=(configip havefiles etherup etherdown pppup pppdown)
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for(i in $tasks $pseudotasks)
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	$i=notdone
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coherence
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for(i in $tasks $pseudotasks)
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	if(~ $#$i 0)
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		$i=notdone
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#
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# we believe the environment about what is done
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# only if we've confirmed it.  since the tasks list is sorted so that
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# prereqs of xxx come before xxx, it's okay to assume xxx
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# is done until proven otherwise -- either a prereq or checkdone
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# will say so.
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#
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done=()
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ready=()
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rm /env/done
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rm /env/ready
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for(i in $tasks) {
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	$i=done
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	for(j in `{prereq $i})
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		if(! ~ $$j done)
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			$i=notdone
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	if(~ $$i done) {
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		export $i
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		$i checkdone
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		$i=`{grep '^'$i^'=' /tmp/vars | sed -n '$p' | sed 's/.*=//'}
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	}
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	if(~ $$i notdone ready) {
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		okay=yes
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		for(j in `{prereq $i})
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			if(! ~ $$j done)
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				okay=no
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		switch($okay){
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		case yes
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			$i=ready
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			export $i
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			$i checkready
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			$i=`{grep '^'$i^'=' /tmp/vars | sed -n '$p' | sed 's/.*=//'}
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		case no
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			$i=notdone
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		}
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	}
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	if(~ $$i done ready)
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		$$i=($$$i $i)		# rc can be just as complicated as perl!
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}
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export $tasks $pseudotasks done ready
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coherence
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echo
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if(! ~ $#done 0) {
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	echo 'The following tasks are done: '
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	for(i in $done)
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		desc $i
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	echo
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}
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echo 'The following unfinished tasks are ready to be done:'
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for(i in $ready)
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	desc $i
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echo
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if(~ $#ready 0) {
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	echo hey you finished everything!  not supposed to happen.
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	sleep 100
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	exit
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}
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prompt -d $ready(1) -w '' 'Task to do' $done $ready
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echo
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echo $div
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$rd go
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$rd=done		# if it's not, the check will figure that out
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export $rd
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}