Dependency extras

[peterschutt]

Any feature of the plugin that requires an additional dependency should require an "extra" install, and that feature should only be enabled if the extra is available.

For example, we make sentry an extra install, and we only configure it if it is available in the environment (and respecting the PluginConfig.do_sentry flag.

[gazorby]

Working on it. I just noticed that we have hiredis requirement but it's not import anywhere, any reason?

[peterschutt]

Thanks for picking this up! This is one that @cofin requested in starlite discord.

If hiredis is in the environment, it is automatically used by redis-py:

For faster performance, install redis with hiredis support, this provides a compiled response parser, and for most cases requires zero code changes. By default, if hiredis >= 1.0 is available, redis-py will attempt to use it for response parsing.

[gazorby]

Alright, so we could create a "caching" dependency group with redis and hiredis what do you think?

[peterschutt]

Not sure - redis is a dependency of saq too. Just saw that you made SAQ optional as well - maybe need to rename the lib 😆