Re: --nest for nested argument files

[Hans Schou]

On Tue, 3 May 2011, Ole Tange wrote:

> On Tue, May 3, 2011 at 4:25 PM, Hans Schou <chlor@schou.dk> wrote:
> > 2011/5/3 Ole Tange <tange@gnu.org>:

> --keeporder has nothing to do with --nest. It keep the output in the
> same order whether or not there are multiple -a. To understand
> --keeporder compare the output of there two:
>
> parallel -k sleep {}\; echo {} ::: 4 1 3 2
> parallel sleep {}\; echo {} ::: 4 1 3 2

eeeh, yes?

chlor@sko:~$ parallel sleep {}\; echo {} ::: 4 1 3 2
4
1
3
2
chlor@sko:~$
chlor@sko:~$ parallel -k sleep {}\; echo {} ::: 4 1 3 2
4
1
3
2
chlor@sko:~$ parallel --version
GNU parallel 20110422

same same.

Why would I use "not keep order"?

> > > If --nest is combined with -X what would you expect that to do?
> >
> > I think --arg-file (-a) should conflict or -X should do nothing if
> > combined with --arg-file.
> > (If I understand -X correctly)
>
> -X makes perfect sense if there is only one -a or input is from a pipe
> (which is the normal situation for use of -X)

And what should -X do when there is 2 or more -a ?

/hans
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