Re: [PATCH v2] builtin: allow passing custom data to sub-commands

[shejialuo <shejialuo@gmail.com>]

On Tue, Nov 26, 2024 at 12:19:22PM +0100, Karthik Nayak wrote:
> In 9b1cb5070f (builtin: add a repository parameter for builtin
> functions, 2024-09-13) the repository was passed down to all builtin
> commands. This allowed the repository to be passed down to lower layers
> without depending on the global `the_repository` variable.
> 
> To remove usage of global variables like `the_repository` in
> sub-commands, it makes sense to pass down the repository value from the
> commands to the sub-commands. But let's make it more generic and modify
> `parse_opt_subcommand_fn` to instead take a `void *` value. This way we
> can provide custom structures to each sub-command.
> 

From my perspective, I think using either "struct repository *" or "void
*" is OK. However, I am a little concerned about using "void *" at
current. It gives me a feeling that we over-optimize here.

Thanks,
Jialuo