#!/bin/rc

fn usage {
	echo usage: merge [-n days] file.... dir
	echo '	'merge [-n days] file1 file2
}

fn domerge {
	echo gnu/diff3 -m $1 `{yesterday $opts $2} $2
	gnu/diff3 -m $1 `{yesterday $opts $2} $2 > $2.xxx
	cp $2.xxx $2 && rm $2.xxx
}

opts=()
while(! ~ $#* 0 && ~ $1 -* && ! ~ $1 --){
	opts=($opts $1)
	shift
}
if(! ~ $#* 0 && ~ $1 --)
	shift
if(~ $#* 0 1)
	usage
if(test -d $$#*) {
	d=$$#*
	while(! ~ $#* 1) {
		domerge $1 $d/$1
		shift
	}
}
if not {
	if (! ~ $#* 2)
		usage
	domerge $1 $2
}