adb: init module

nixos/modules/module-list.nix

@@ -61,6 +61,7 @@
   ./misc/nixpkgs.nix
   ./misc/passthru.nix
   ./misc/version.nix
+  ./programs/adb.nix
   ./programs/atop.nix
   ./programs/bash/bash.nix
   ./programs/blcr.nix

nixos/modules/programs/adb.nix

@@ -0,0 +1,30 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  meta.maintainers = [ maintainers.mic92 ];
+
+  ###### interface
+  options = {
+    programs.adb = {
+      enable = mkOption {
+        default = false;
+        example = true;
+        type = types.bool;
+        description = ''
+          Whether to configure system to use Android Debug Bridge (adb).
+          To grant access to a user, it must be part of adbusers group:
+          <code>users.extraUsers.alice.extraGroups = ["adbusers"];</code>
+        '';
+      };
+    };
+  };
+
+  ###### implementation
+  config = mkIf config.programs.adb.enable {
+    services.udev.packages = [ pkgs.android-udev-rules ];
+    environment.systemPackages = [ pkgs.androidenv.platformTools ];
+    users.extraGroups.adbusers = {};
+  };
+}