Merge pull request #217885 from cbrewster/nsc-completion

nsc: add shell completion

pkgs/tools/system/nsc/default.nix

@@ -2,6 +2,7 @@
 , stdenv
 , buildGoModule
 , fetchFromGitHub
+, installShellFiles
 }:
 
 buildGoModule rec {
@@ -24,6 +25,15 @@ buildGoModule rec {
 
   vendorHash = "sha256-gDwppx0ORG+pXzTdGtUVbiFyTD/P7avt+/V89Gl0QYY=";
 
+  nativeBuildInputs = [ installShellFiles ];
+
+  postInstall = ''
+    installShellCompletion --cmd nsc \
+      --bash <($out/bin/nsc completion bash) \
+      --fish <($out/bin/nsc completion fish) \
+      --zsh <($out/bin/nsc completion zsh)
+  '';
+
   preCheck = ''
     # Tests attempt to write to the home directory.
     export HOME=$(mktemp -d)