Re: Some globstar patterns produce duplicate entries and a null filename

[Roman Rakus]

On 12/10/2012 11:29 PM, Chet Ramey wrote:
> On 12/5/12 3:17 AM, Roman Rakus wrote:
>
> > Works well when used up to 2 levels of ** - ** and **/** is fixed.
> > However still produce duplicates, when used more levels - **/**/**. Also
> > produce duplicates for **/a/** form.
>
> The next version will treat any sequence of **/** the same as **, so those
> duplicates will be suppressed.
>
> I'm going to argue that some duplicates are going to be expected when you
> have patterns like **/a/** that can match the same directory name using
> two different "paths," if you will.  Other shells that implement **, such
> as ksh93, agree.  Imperfect, but there's not a good solution.
>
> Chet
Interesting. So it is up to script writer to delete duplicates. Will you 
be interested in patch which will clear duplicates? Let's say it will be 
some function run after expansion. And it will be optionally turned on. 
I guess it will not have any higher glob execution time impact.

RR