Re: [PATCH] completion: include PARSE_OPT_HIDDEN in completion output

>
> The PARSE_OPT_HIDDEN is, per the documentation of the "option" struct
> in option parse-options.h, only supposed to affect -h output, not
> completion. That's what the PARSE_OPT_NOCOMPLETE flag is supposed to
> be for.
>
> Since 2e29dca66a ("completion: use __gitcomp_builtin in _git_commit",
> 2018-02-09) we've been using e.g. "git commit --git-completion-helper"
> to get the bash completion for the git-commit command. Due to
> PARSE_OPT_HIDDEN this excluded e.g. --allow-empty and
> --allow-empty-message.
>
> Now, this wasn't a behavior change in that commit. Before that we had
> a hardcoded list of options, removed in 2e29dca66a ("completion: use
> __gitcomp_builtin in _git_commit", 2018-02-09). This list didn't
> contain those two options.
>
> But as noted in the follow-up discussion to c9b5fde759 ("Add option to
> git-commit to allow empty log messages", 2010-04-06) in
> https://public-inbox.org/git/20100406055530.GE3901@coredump.intra.peff.net/
> the motivation for PARSE_OPT_HIDDEN was to keep the "git commit -h"
> output to a minimum, not to hide it from completion.
>
> I think it makes sense to exclude options like these from -h output,
> but for the completion the user is usually not trying to complete "git
> commit --<TAB>",