#!/bin/rc
rfork e

fn xchmod { 
	chmod $* >[2]/dev/null
}

if(~ $#* 0 1 2){
	echo 'usage: patch/create name email file... [< description]' >[1=2]
	exit usage
}

if(! echo $1 | grep -s '^[a-z_0-9.\-]+$'){
	echo 'bad name: [a-z0-9._\-]+ only' >[1=2]
	exit usage
}
if(! echo $2 | grep -s '^(-|[A-Za-z0-9.\-+]+@[A-Za-z0-9.\-+]+)$'){
	echo 'bad email: [a-z0-9.-+] only; use ''-'' to not leave an email address.' >[1=2]
	exit usage
}

if(! test -d /n/sources/patch){
	rfork n
	9fs sources
}

patch=$1
email=$2
shift
shift
d=/n/sources/patch/$patch
if(! mkdir $d){
	echo mkdir $d failed >[1=2]
	exit mkdir
}
if(! ~ $email -){
	echo $email >$d/email
}

xchmod o-w $d
>$d/readme
>$d/files
>$d/notes
for(i in $*){
	i=`{cleanname -d `{pwd} $i}
	if(! test -f $i){
		echo error: cannot find $i >[1=2]
		rm -rf $d
		exit oops
	}
	short=`{basename $i}
	uniq=$short
	n=0
	while(test -f $d/$uniq){
		uniq=$short.$n
		n=`{echo 1+$n | hoc}
	}
	cp $i $d/$uniq
	if(test -f /n/sources/plan9/$i){
		if(cmp -s /n/sources/plan9/$i $i)
			echo warning: new file $i does not differ from sources >[1=2]
		cp /n/sources/plan9/$i $d/$uniq.orig
	}
	if not
		echo warning: new file $i not on sources >[1=2]
	echo $i $uniq >>$d/files
	xchmod ug+rw $d/*
	xchmod a+r $d/*
}

if(~ `{cat /proc/$pid/fd | awk 'NR==2{print $NF}'} */dev/cons && test -w /dev/consctl){
	>/dev/consctl {
		echo holdon
		cat >$d/readme
	}
}
if not
	cat >$d/readme

if(! test -s $d/readme){
	echo 'no description given; aborting' >[1=2]
	rm -rf $d
	exit oops
}

echo $d