From: Felipe Contreras <felipe.contreras@gmail.com>
Date: Fri, 13 Apr 2012 10:48:51 GMT
Subject: Re: [PATCH v2] tests: add initial bash completion tests
Message-ID: <CAMP44s3g8acV4fjaSvnUo_jnhj40-TWR0az6zOwRNfv9_Qa23g@mail.gmail.com>
In-Reply-To: <20120413094500.GD2164@goldbirke>

2012/4/13 SZEDER Gábor <szeder@ira.uka.de>:
> On Fri, Apr 13, 2012 at 11:12:36AM +0200, SZEDER Gábor wrote:
>> On Thu, Apr 12, 2012 at 12:57:03AM +0300, Felipe Contreras wrote:
>> > +. "$GIT_BUILD_DIR/contrib/completion/git-completion.bash"
>> > +
>> > +_get_comp_words_by_ref ()
>> > +{
>> > +   while [ $# -gt 0 ]; do
>> > +           case "$1" in
>> > +           cur)
>> > +                   cur=${_words[_cword]}
>> > +                   ;;
>> > +           prev)
>> > +                   prev=${_words[_cword-1]}
>> > +                   ;;
>> > +           words)
>> > +                   words=("${_words[@]}")
>> > +                   ;;
>> > +           cword)
>> > +                   cword=$_cword
>> > +                   ;;
>> > +           esac
>> > +           shift
>> > +   done
>> > +}
>>
>> Git's completion script already implements this function.  Why
>> override it here?
>
> Ah, ok, I think I got it.
>
> Of course, the words on the command line must be specified somehow to
> test completion functions.  But the two implementations of
> _get_comp_words_by_ref() for bash and zsh in the completion script
> take the words on the command line from different variables, so we
> need a common implementation to test completion functions both on bash
> and zsh.  Hence the _get_comp_words_by_ref() above, which takes the
> words on the command line and their count from $_words and $_cword,
> respectively, and run_completion() below, which fills those variables
> with its arguments.

Well, yeah, that's one reason, but also I don't see the point in
trying to fill the internal bash completion variables, maybe there
would be some conflicts? Plus, the bash version of
_get_comp_words_by_ref is rather complicated, so I decided to start
with something simple that I could understand and see exactly what's
going on. And for zsh I would definitely prefer to override
_get_comp_words_by_ref than to mess with the internal variables,
although I haven't found a way to test completion for zsh.

Cheers.

-- 
Felipe Contreras