Re: Filtering argument lists (e.g. for grep)

[Dominik Vogt <vogt@xxxxxxxxxxxxxxxxxx>]

On Mon, Dec 07, 2015 at 11:23:54AM +0000, Peter Stephenson wrote:
> On Mon, 7 Dec 2015 11:56:22 +0100
> Dominik Vogt <vogt@xxxxxxxxxxxxxxxxxx> wrote:
> > Maybe grep is a bad example because this can be done with the
> > --exclude= option.  But could zsh help filtering the names
> > generated by globbing in a more general way so that I could write
> > 
> >   $ <foo> *
> > 
> > and have zsh automagically filter the results of the * (not
> > everywhere; only for commands that have this feature enabled) so
> > that the non-matching names are not passed to the command in the
> > first place?
 
> You could use a global alias, e.g.
> 
> alias -g '@*'='*~(*\~|\#*|ChangeLog)'

Yes, but then I'd need an alias for every potential pattern, e.g.
@*.s*, @**/*, @*.c.* etc.

> Ig you want that first * to be something more flexible you can use a
> glob qualifier.
> 
>   gi () {
>     [[ $REPLY != (*\~|\#*|ChangeLog) ]]
>   }
> 
> and use
> 
>   <foo> *(+gi)

That sounds good, but is there a way to make that qualifier a
default for certain commands?  As an alternative, is it possible
to access the command name from inside the qualifier function?

  function gi () {
    if <command should be filtered>; then
      [[ $REPLY != (*\~|\#*|ChangeLog) ]]
    fi
  }

Ciao

Dominik ^_^  ^_^

-- 

Dominik Vogt
IBM Germany