nali: install completions

pkgs/applications/networking/nali/default.nix

@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, buildGoModule }:
+{ lib, fetchFromGitHub, buildGoModule, installShellFiles }:
 
 buildGoModule rec {
   pname = "nali";
@@ -14,6 +14,15 @@ buildGoModule rec {
   vendorHash = "sha256-l3Fs1Hd0kXI56uotic1407tb4ltkCSMzqqozFpvobH8=";
   subPackages = [ "." ];
 
+  nativeBuildInputs = [ installShellFiles ];
+
+  postInstall = ''
+    installShellCompletion --cmd nali \
+      --bash <($out/bin/nali completion bash) \
+      --fish <($out/bin/nali completion fish) \
+      --zsh <($out/bin/nali completion zsh)
+  '';
+
   meta = with lib; {
     description = "An offline tool for querying IP geographic information and CDN provider";
     homepage = "https://github.com/zu1k/nali";