nixos-firewall-tool: add shell completions for bash and fish

pkgs/by-name/ni/nixos-firewall-tool/nixos-firewall-tool.bash

@@ -0,0 +1,20 @@
+_nixos_firewall_tool() {
+  case "${COMP_CWORD}" in
+    1)
+      COMPREPLY=($(compgen -W "open show reset" -- "${COMP_WORDS[1]}"))
+      ;;
+    2)
+      case "${COMP_WORDS[1]}" in
+        "open")
+          COMPREPLY=($(compgen -W "tcp udp" -- "${COMP_WORDS[2]}"))
+          ;;
+        *)
+          ;;
+      esac
+      ;;
+    *)
+      ;;
+  esac
+}
+
+complete -F _nixos_firewall_tool nixos-firewall-tool

pkgs/by-name/ni/nixos-firewall-tool/nixos-firewall-tool.fish

@@ -0,0 +1,5 @@
+complete -c nixos-firewall-tool -f
+complete -c nixos-firewall-tool -k -a reset -d 'Reset firewall configuration to system settings' -n "__fish_is_first_token"
+complete -c nixos-firewall-tool -k -a show -d 'Show all firewall rules' -n "__fish_is_first_token"
+complete -c nixos-firewall-tool -k -a open -d 'Open a port temporarily' -n "__fish_is_first_token"
+complete -c nixos-firewall-tool -k -a "tcp udp" -n "__fish_seen_subcommand_from open && __fish_is_nth_token 2"

pkgs/by-name/ni/nixos-firewall-tool/package.nix

@@ -24,6 +24,7 @@ stdenvNoCC.mkDerivation rec {
 
   installPhase = ''
     installBin nixos-firewall-tool
+    installShellCompletion nixos-firewall-tool.{bash,fish}
   '';
 
   # Skip shellcheck if GHC is not available, see writeShellApplication.