Load Sqlite unicode extension

lib/music_library/repo.ex

@@ -2,4 +2,38 @@ defmodule MusicLibrary.Repo do
   use Ecto.Repo,
     otp_app: :music_library,
     adapter: Ecto.Adapters.SQLite3
+
+  def init(_context, config) do
+    {:ok,
+     Keyword.put(config, :load_extensions, [
+       extension_path("unicode")
+     ])}
+  end
+
+  def extension_path(name) do
+    [arch | _rest] = :erlang.system_info(:system_architecture)
+      |> List.to_string()
+      |> String.split("-")
+
+    {_, os} = :os.type()
+
+    platform = case {os, arch} do
+      {:darwin, "x86_64"} -> "darwin-amd64"
+      {:darwin, "aarch64"} -> "darwin-aarch64"
+      {:linux, "x86_64"} -> "linux-amd64"
+      _other -> raise "Unsupported OS or platform"
+    end
+
+    extension = case os do
+      :darwin -> "dylib"
+      :linux -> "so"
+    end
+
+    Path.join([
+     :code.priv_dir(:music_library),
+      "sqlite_extensions",
+      platform,
+      "#{name}.#{extension}"
+    ])
+  end
 end

priv/sqlite_extensions/README.md

@@ -0,0 +1,3 @@
+# SQLite extensions
+
+Lifted from <https://github.com/mindreframer/ex_sqlean>, original files under MIT license.