zsh completion with _files

zsh completion with _files

[Cornelius Kölbel]

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Hi,

i am writing my own zsh completion for a program.
I started today and used _arguments, _describe, compadd and _files so far.
I used tests for the previous and the pre-previous word like
$words[$#words-1 or 2] .

Now I am wondering how I can achieve this:

If the user types a "@" this marks that after the at-sign filenames are
allowed to be entered.
So I need to check the current word and compare it accordingly.

I realized that it might work this way:

        local curr=$words[$#words]

        case $curr in
        @*)
                _files
        ;;
        esac

But then it is looking for files starting with @.
So I wonder if there is any parameter telling the _files function to
drop the first character.
I see there is many documentation, but I did not find anything it it -
maybe since I do not know what to search for...

THanks a lot and kind regards
Cornelius


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Re: zsh completion with _files

[Oliver Kiddle]

Cornelius Kölbel wrote:
> 
> I used tests for the previous and the pre-previous word like
> $words[$#words-1 or 2] .

That might not be want you want if the cursor is in the middle of the
line rather than at the end. You might want $words[CURRENT] or
$words[CURRENT-1], etc.

> I realized that it might work this way:
> 
>         local curr=$words[$#words]
> 
>         case $curr in
>         @*)
>                 _files
>         ;;
>         esac

> But then it is looking for files starting with @.

You need to move the @ character from the PREFIX to the IPREFIX
variable. There's a shortcut for this using the compset command:
  if compset -P '@'; then
    _files
  else
    ...

Oliver

Re: zsh completion with _files

[Bart Schaefer]

On Oct 7,  5:43pm, Cornelius Kolbel wrote:
}
} If the user types a "@" this marks that after the at-sign filenames are
} allowed to be entered.
} So I need to check the current word and compare it accordingly.

You're probably looking for

    compset -P '*@'

Look at the manual section on "Completion Builtin Commands".  _arguments
et al. will handle calling "compadd" for you in most cases, but you have
to set up the prefixes and suffixes if there are words (in the zsh syntax
sense) from which you want to complete substrings.

Re: zsh completion with _files

[Cornelius Kölbel]

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Hi Bart, hi Oliver,

thanks a lot, that did the trick...

Kind regards
Cornelius

Am 07.10.2014 um 18:02 schrieb Oliver Kiddle:
> Cornelius Kölbel wrote:
>> I used tests for the previous and the pre-previous word like
>> $words[$#words-1 or 2] .
> That might not be want you want if the cursor is in the middle of the
> line rather than at the end. You might want $words[CURRENT] or
> $words[CURRENT-1], etc.
>
>> I realized that it might work this way:
>>
>>         local curr=$words[$#words]
>>
>>         case $curr in
>>         @*)
>>                 _files
>>         ;;
>>         esac
>> But then it is looking for files starting with @.
> You need to move the @ character from the PREFIX to the IPREFIX
> variable. There's a shortcut for this using the compset command:
>   if compset -P '@'; then
>     _files
>   else
>     ...
>
> Oliver



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