Context.params isn't setup in the MultiCommand.list_commands method

Expected Behavior

I can refer parsed options in MultiCommand.list_commands method.

Actual Behavior

I can't. Options aren't initialized in the list_commands.

I'm creating a CLI tool that dynamically loads subcommands from a file. And the location of the file is specified by an option of the CLI tool. I can refer the parsed option in MultiCommand.get_command but I can't refer it in MultiCommand.list_commands method.

I think the list_command method is called before finishing the parse_args method so we can't use parsed options in the list_commands.

https://github.com/pallets/click/blob/fef921a4d0c807673d7800af4dd4ca604f6489e4/src/click/core.py#L1242
https://github.com/pallets/click/blob/fef921a4d0c807673d7800af4dd4ca604f6489e4/src/click/core.py#L1217

I created the following file and I got an empty dictionary object by the logger.debug when I execute the following command.

https://github.com/polikeiji/bkm/blob/master/bkm.py#L94

python -m bkm -f AAA --help

Is this behavior the expected one?

Environment

• Python version: 3.8.0
• Click version: 7.1.2

Reproduce the reported behavior with python -m bkm -f AAA --help, then inspect src/click/core.py around MultiCommand.list_commands, get_command, and parse_args, along with the referenced bkm.py. Determine whether parsed options should be available during command listing, and consider the issue complete when the documented behavior is resolved and verified against this reproduction.