feat(python): externally configurable python exe/dirs

config/config.exs

@@ -91,6 +91,10 @@ config :ex_unit,
 # By default, Nostrum requires ffmpeg to use voice.
 config :nostrum, :ffmpeg, false
 
+config :stampede,
+  python_exe: System.fetch_env!("FLAKE_PYTHON"),
+  python_plugin_dirs: ["./lib_py"]
+
 for config <- "./*.secret.exs" |> Path.expand(__DIR__) |> Path.wildcard() do
   import_config config
 end

flake.nix

@@ -118,6 +118,8 @@
 
           # define shell startup command
           sh-hook = ''
+            export FLAKE_PYTHON="${python}/bin/python3"
+
             # this allows mix to work on the local directory
             mkdir -p .nix-mix
             mkdir -p .nix-hex

lib/stampede/plugin_foreign/python.ex

@@ -1,7 +1,11 @@
 defmodule Stampede.PluginForeign.Python.Pool do
   @moduledoc false
   use Doumi.Port,
-    adapter: {Doumi.Port.Adapter.Python, python_path: ["./lib_py"]},
+    adapter: {
+      Doumi.Port.Adapter.Python,
+      python: Application.fetch_env!(:stampede, :python_exe),
+      python_path: Application.fetch_env!(:stampede, :python_plugin_dirs)
+    },
     pool_size: 4
 end
 

lib_py/example.py

@@ -1,7 +1,5 @@
-from typing import (
-    Optional,
-    Dict
-)
+from typing import Optional, Dict
+
 
 def process(cfg, event) -> Optional[Dict]:
     if event[b"body"] == b"ping python":