#212 Add class attribute callbacks.Commands.pre_command_callbacks.

[Valentin Lorentz]

Hi,

This patch introduces a list of functions called before calling any command, and the command is actually called iff all functions returned False.
https://github.com/ProgVal/Limnoria/commit/3a5c4c3ddd9e9995c6f2501b44b1b469992b0e31

This feature does not look useful at first glance, but I needed it for a rate limiting plugin: https://github.com/ProgVal/Supybot-plugins/blob/master/RateLimit/plugin.py

Regards,
Valentin

[Valentin Lorentz]

And an extra feature for this: https://github.com/ProgVal/Supybot-plugins/commit/b300fc34c5cb01d33c8c1cec6e5ff77c08163851

I needed it in a development plugin, you will be able to find it at https://github.com/ProgVal/Supybot-plugins/blob/master/SilencePlugin/plugin.py when I will publish it.