Initial commit with IRC and bot example.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

lib/module_supervisor.ex

@@ -0,0 +1,52 @@
+defmodule Omnibot.ModuleSupervisor do
+  @moduledoc false
+
+  use Supervisor
+  require Logger
+
+  def start_link(opts \\ []) do
+    Supervisor.start_link(__MODULE__, opts[:cfg], opts)
+  end
+
+  @impl true
+  def init(cfg) do
+    compile_files(cfg.module_paths || [])
+
+    # Map the modules in the configuration to the children
+    children =
+      for mod <- cfg.modules do
+        case mod do
+          {name, cfg} -> {name, cfg: cfg, name: name}
+          name -> {name, cfg: [], name: name}
+        end
+      end
+
+    Supervisor.init(children, strategy: :one_for_one)
+  end
+
+  defp compile_files([]), do: nil
+
+  defp compile_files([{path, opts} | module_paths]) do
+    case {File.exists?(path), File.dir?(path)} do
+      {_, true} -> compile_dir(path, opts[:recurse] || false)
+      {true, false} -> Code.require_file(path)
+      {_, _} -> Logger.error("module path '#{path}' does not exist, it will not be loaded")
+    end
+
+    compile_files(module_paths)
+  end
+
+  defp compile_files([path | module_paths]) do
+    compile_files([{path, []} | module_paths])
+  end
+
+  defp compile_dir(path, recurse) do
+    files =
+      File.ls!(path)
+      |> Enum.map(fn file -> {Path.join(path, file), [recurse: recurse]} end)
+      |> Enum.filter(fn {file, [recurse: recurse]} ->
+        (!File.dir?(file) || recurse) && File.exists?(file)
+      end)
+    compile_files(files)
+  end
+end