Plugin system + Lua code blocks

[Raymond26]

• Foundational work for extensions: Main use case is adding handling for third-party directives with different syntax
• A plugin for handling Lua code blocks

[aluttik]

Wow! Really great work here :)

Before I merge, I'd like to try and trick your lexer changes.

Could you add an upstream block to one of the lua test configs that looks like this?

upstream content_by_lua_block {
    # stuff
}

I want to make sure the { gets read as a token instead of being consumed as part of a lua block.

[Raymond26]

Thanks! I added that and it looks like { gets read as a token works fine. But I just found that comment parsing/build doesn't work... gonna check that out

[Raymond26]

Oh, just forgot the comment=True flag

[gshulegaard]

:field_hockey::dash: (pending final :dash: from @aluttik)

[aluttik]

:100::dash: