The CLI module is terrible

[MrHedmad]

The CLI module (cli.py) should be overhauled.

• There is no support to use ARROW UP and ARROW DOWN to cycle through the CLI history.
• There is not TAB completion support.
• There could be command composition support (such as that provided by discord.py)

A possible solution would be to use an appropriate library such as click or similar, but they would need to be capable of async.

It is best to move the CLI out of the cogs and into the bot itself, and schedule its execution with asyncio.Loop.create_task as the bot starts (run) and stop it as the bot closes (close).

[MrHedmad]

I asked on Pydis for how to make this module better. A suggestion was to use prompt-toolkit (perhaps instead of aioconsole?).

Another useful tip is to wrap stdout to not override the CLI prompt on message:

class WrappedStdout:
  def __init__(self, stream):
    self.stream = stream
  def write(self, message):
    # handle it
    pass

sys.stdout = WrappedStdout(sys.stdout)