#!/usr/local/plan9/bin/rc

flag e +

fn updatetree{			# hg-id dir hg-url make-target
	wd=`{pwd}
	if (test -d $2) {
		cd $2
		if (! ~ `{hg id -n} $1) {
			hg update $1
			make $4
		}
		cd $wd
	}
	if (! test -d $2) {
		hg clone $3 $2
		cd $2
		hg update $1
		make $4
		cd $wd
	}
	~ 0 0
}

test -f portid
test -f previd
mkdir -p ,,prevmd/src/github.com/knieriem

id=`{cat portid}
echo '*' prepare original c-based peg-markdown $id
updatetree $id ,,pmd git://github.com/jgm/peg-markdown.git ()

id=`{cat previd}
echo '*' prepare "previous version" $id
cd ,,prevmd
GOPATH=`{pwd}
updatetree $id src/github.com/knieriem/markdown .. cmd