feat: Generate user modules using modkit mounts

Author: lud

README.md

@@ -56,7 +56,7 @@ import Config
 
 # The prefix is used when creating solutions and test modules with
 # `mix aoc.create`.
-config :aoc, prefix: MyApp
+config :aoc, prefix: MyApp.Solutions
 ```
 
 
@@ -319,7 +319,7 @@ be called by `mix aoc.run` and the generated tests.
 (Note: You can generate modules without the help comments by passing the `-C` flag in `mix aoc.create`.)
 
 ```elixir
-defmodule MyApp.Y24.Day01 do
+defmodule MyApp.Solutions.Y24.Day01 do
   alias AoC.Input
 
   def parse(input, _part) do

lib/aoc/grid.ex

@@ -18,4 +18,30 @@ defmodule AoC.Mod do
   defp prefix do
     Application.fetch_env!(:aoc, :prefix)
   end
+
+  def module_path(module) do
+    modkit_mount = Modkit.load_current_project().mount
+
+    case Modkit.Mount.preferred_path(modkit_mount, module) do
+      {:ok, path} ->
+        path
+
+      {:error, :not_mounted} ->
+        raise """
+        invalid modkit configuration
+
+        If you use Modkit in your project, make sure that the configured prefix
+        for AoC is defined in your mount points.
+
+        # Module
+        #{inspect(module)}
+
+        # AoC config
+        config :aoc, prefix: #{inspect(prefix())}
+
+        # Modkit config
+        #{inspect(modkit_mount)}
+        """
+    end
+  end
 end