Give better error message when a global option is passed after command, not before (was "Option `--config-file` not recognized out of order")

[andreasabel]

--config-file is listed as global option by cabal --help, but get/unpack does not recognize it:

$ cabal get --config-file=foo
Error: cabal: unrecognized 'get' option `--config-file=foo'

(Spawned from #7702 (comment).)

UPDATE:

$ cabal --config-file=foo get bar

works, so this is merely an issue about a more user-friendly parsing of command-line options.

[Mikolaj]

Ouch. I missed the order of options thing. Yes, we'd benefit from more relaxed parsing or a better error message, ideally recognizing the option and asking to reverse the order.

[gbaz]

All global options are required to go before commands, and --help documents this. Changing it seems rather difficult.

[Mikolaj]

You are right, --help is explicit about this, in one of the first lines.

However, a better error message would help.

[Mikolaj]

@andreasabel: I took the liberty of changing the title of the ticket. Please feel free to revert.