Merge pull request #16 from akash-akya/mac-arm64-bin

Add pre-built binary for macos arm64

lib/mix/compile.ex

@@ -29,6 +29,7 @@ defmodule Mix.Tasks.Compile.Odu do
       {"windows", "amd64"} -> "odu_windows_amd64.exe"
       {"linux", "amd64"} -> "odu_linux_amd64"
       {"darwin", "amd64"} -> "odu_darwin_amd64"
+      {"darwin", "arm64"} -> "odu_darwin_arm64"
       # generic name for all other platform
       _ -> "odu"
     end
@@ -60,7 +61,7 @@ defmodule Mix.Tasks.Compile.Odu do
     result =
       System.cmd(
         "go",
-        ~w/build -o #{executable_path}/,
+        ~w/build -ldflags -w -o #{executable_path}/,
         cd: "go_src",
         stderr_to_stdout: true,
         env: env
@@ -95,21 +96,45 @@ defmodule Mix.Tasks.Compile.Odu do
   end
 
   defp current_platform do
-    is_amd64 = String.starts_with?(@system_arch, "x86_64")
+    {osfamily, osname} = :os.type()
+    arch = system_arch(osfamily)
 
-    case :os.type() do
-      {:win32, _} ->
-        # FIXME: determine architecture properly
+    case {osfamily, osname, arch} do
+      {:win32, _, "amd64"} ->
         {"windows", "amd64"}
 
-      {:unix, :linux} when is_amd64 ->
+      {:unix, :linux, "amd64"} ->
         {"linux", "amd64"}
 
-      {:unix, :darwin} when is_amd64 ->
+      {:unix, :darwin, "amd64"} ->
         {"darwin", "amd64"}
 
-      {:unix, os_name} ->
+      {:unix, :darwin, "aarch64"} ->
+        {"darwin", "arm64"}
+
+      {:unix, os_name, _} ->
         {to_string(os_name), nil}
     end
   end
+
+  defp system_arch(osfamily) do
+    arch =
+      :erlang.system_info(:system_architecture)
+      |> List.to_string()
+      |> String.split("-")
+      |> List.first()
+
+    # normalize
+    arch =
+      if osfamily == :win32 && :erlang.system_info(:wordsize) == 8 do
+        "amd64"
+      else
+        arch
+      end
+
+    case arch do
+      "x86_64" -> "amd64"
+      arch -> arch
+    end
+  end
 end