Support -h/--help for all programs

[Rangi42]

Fixes #1608

Resolved

[ISSOtm]

I think that this would warrant a separate rgbasm --help line, actually. Since this is not meant to be used with the rest.

[Rangi42]

I think that this would warrant a separate rgbasm --help line, actually. Since this is not meant to be used with the rest.

I'm not sure what you mean by "a separate line". h is treated the same way as V so far.

I see that the Rust-rewritten RGBGFX supports a -h flag for basic usage information, same as here, or a long --help flag for more verbose usage information, though still not as "comprehensive" as the man page. And instead of printing the whole usage information, an erroneous flag like --foobar just prints "For more information, try --help." Also the usage information printed by -h/--help lists -h,--help and -V,--version last after all the other arguments. (Although this is because the summary string on top just says "[OPTIONS]", so it doesn't have an argumentless group like RGBASM's [-EhVvw] in the first place.)

Anyway, I'm not sure what lesson to take from all that. List --help last among the "useful options" for each program? That's probably a good idea, but we'd still leave h and V in the argumentless groups.