Add docker-native module for native docker support in NixOS

[ajaxbits]

Addresses #59 by overlaying legacy iptables on the docker package.

[grantbevis]

This looks good to me code wise @nzbr but I haven't the means to test this currently - Are you able to test?

[grantbevis]

Fixes #59

[nzbr]

It works (just tested it). I have a patch to rename the old docker option to docker-desktop. GitHub does not allow attaching .patch-Files for some reason, but if you want to apply my commit, just save the code block below to a file and run git am <filename>

From 4017d905d9c787400c1b4c6abb83d787dc0d69fa Mon Sep 17 00:00:00 2001
From: nzbr <mail@nzbr.de>
Date: Thu, 21 Apr 2022 10:29:22 +0200
Subject: [PATCH] rename existing docker option to docker-desktop

---
 configuration.nix          | 2 +-
 modules/docker-desktop.nix | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/configuration.nix b/configuration.nix
index 8ecca30..26f1680 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -18,7 +18,7 @@ in
     startMenuLaunchers = true;
 
     # Enable integration with Docker Desktop (needs to be installed)
-    # docker.enable = true;
+    # docker-desktop.enable = true;
 
     # Enable native Docker support within NixOS
     # docker-native.enable = true;
diff --git a/modules/docker-desktop.nix b/modules/docker-desktop.nix
index 3e0d200..d822526 100644
--- a/modules/docker-desktop.nix
+++ b/modules/docker-desktop.nix
@@ -1,13 +1,17 @@
 { config, lib, pkgs, ... }:
 with builtins; with lib; {
 
-  options.wsl.docker = with types; {
+  imports = [
+    (mkRenamedOptionModule [ "wsl" "docker" ] [ "wsl" "docker-desktop" ])
+  ];
+
+  options.wsl.docker-desktop = with types; {
     enable = mkEnableOption "Docker Desktop integration";
   };
 
   config =
     let
-      cfg = config.wsl.docker;
+      cfg = config.wsl.docker-desktop;
     in
     mkIf (config.wsl.enable && cfg.enable) {
 
-- 
2.33.1

[nzbr]

Renaming the new module to just docker conflicts with the mkRenamedOptionModule in docker-desktop.nix. Also, this would switch anyone who currently uses the docker desktop integration over to docker native, which may not be desired. I prefer we leave docker-desktop and docker-native as two equal options

[ajaxbits]

Thanks, @nzbr, I also noticed that error with mkRenamedOptionModule when I made my push. Sorry about that.

Things should be resolved now, as I reverted to stick with the docker-native option. Let me know if you think there's a better name for this option, as I'm not in love with "docker-native."

I also made some misc. wording changes in configuration.nix to clarify things.

[nzbr]

I think docker-native is fine, especially as it clearly differentiates the option from docker-desktop. I'll merge this now, if that's fine with you

[ajaxbits]

I'll merge this now, if that's fine with you

Sounds great to me!