I’ve been messing around with require quite a bit and still can’t seem to get it to work. What seems to be happening is Mix.Tasks.Xref.calls() comes up empty on first compile. If I edit what seems to be just about any file related to the router and then recompile, it comes up with a list of callers like I expect.
Doing a require on the router module, packet module, or even requiring the actual packet definition in the router does not seem to get it working.
I’ve started looking through the code on github for mix xref callers because it seems to always list out the dependency’s of Packet correctly (or at least the files that use it). I’m hoping that will shed some light on a possible solution.
I have to admit I’m still fairly new to elixir. If you think creating a compiler plugin is a good way to go I would love to know where I can find related documentation so I can learn more. If you don’t mind can you help point me in the right direction here?
That says they are either on the wrong file or not put in early in the compilation process.
Honestly I’m thinking this is just a bit odd of a design overall regardless, I would probably just hardcode those all in as it’s not like they are going to be changing often anyway and adding new ones is easy. ^.^;
If you really want to go the more complex route (which be sure that you do), I’d really say take a look at my afore-mentioned protocol_ex, your solution might look similar to (typed in-post so likely has syntax errors):
# Define the main module:
import ProtocolEx
defprotocolEx Blah do
def parse(header, data) # Since no fallback body then this must be handled by the implementations
def parse(<<header::integer-little-8, data::bytes), do: parse(header, data)
end
Then just write the implementations like:
import ProtocolEx
defimplEx Login, 1, for: Packet do
def parse(_, data) do
# whatever you need here...
end
# You could add more `parse/2` callbacks here that handle other numbers as well if you want,
# or make other implementations like below
end
Then maybe another one somewhere else:
import ProtocolEx
defimplEx Chat, 2, for: Packet do
def parse(_, data) do
# whatever you need here...
end
end
Etc…
And of course you can add a run function and all sorts as well too. Whatever. (If you need new features in protocol_ex, just ask). It has a lot of other abilities and optimizations and such you can do as well, but as-is it already does what you posted that you want.
Don’t forget to add the compile for protocol_ex to the mix.exs file as per the documentation too (or you can always handle it manually too if you want).
(EDIT: Updated examples to be actual code rather than just placeholder code)
I’ll likely either hard code or use ProtocolEx as you’ve suggested. ProtocolEx does look really nice, the only reason I’ve been shying away from it is this is a learning experience for me.
Prior to this project I didn’t even know the difference between use, import, and require. As I’m reading and learning I’m trying to use everything I’m learning in some way even if it’s not the most appropriate for the situation. I need to get it to sink in somehow!
I appreciate everyone’s patience and I’ve been really surprised by how helpful and knowledgeable the Elixir community is. Thank you for the examples, links, and information you’ve provided. It’s been a huge help.
