contrib/plan9/9mail

merge: add _checkunknowndirs function for detecting path conflicts

Add a new function which, given a file name, finds the shortest path for which
there is a conflicting file or directory in the working directory.

Differential Revision: https://phab.mercurial-scm.org/D779

#!/bin/rc
# 9mail - Mercurial email wrapper for upas/marshal

fn usage {
	echo >[1=2] usage: mercurial/9mail -f from to [cc]
	exit usage
}

from=()
cc=()
to=()

switch($1){
case -f
	from=$2
case *
	usage
}

to=($3)
if(~ $#* 4)
	cc=(-C $4)

upasname=$from
upas/marshal $cc $to