feat: fish -> nu

config/users.nix

@@ -1,9 +1,19 @@
 {
   config,
+  lib,
   pkgs,
   ...
 }: let
   keys = ["ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILm0O46zW/XfVOSwz0okRWYeOAg+wCVkCtCAoVTpZsOh"];
+
+  nu_scripts = "${pkgs.nu_scripts}/share/nu_scripts";
+  mkCompletions = completions:
+    lib.concatStringsSep "\n" (
+      builtins.map (
+        el: "source ${nu_scripts}/custom-completions/${el.name or el}/${el.filename or el}-completions.nu"
+      )
+      completions
+    );
 in {
   i18n.defaultLocale = "en_US.UTF-8";
 
@@ -29,29 +39,72 @@ in {
           initExtra =
             # bash
             ''
-              if [[ $(${pkgs.procps}/bin/ps --no-header --pid=$PPID --format=comm) != "fish" && -z ''${BASH_EXECUTION_STRING} ]]; then
-                shopt -q login_shell && LOGIN_OPTION='--login' || LOGIN_OPTION=""
-                exec ${pkgs.fish}/bin/fish $LOGIN_OPTION
+              if [[ $(${pkgs.procps}/bin/ps --no-header --pid=$PPID --format=comm) != "nu" && -z ''${BASH_EXECUTION_STRING} ]]; then
+                exec ${lib.getExe pkgs.nushell}
               fi
             '';
         };
-        direnv.enable = true;
-        fish = {
+        direnv = {
           enable = true;
-          interactiveShellInit = "set fish_greeting";
-          plugins = [
-            {
-              name = "plugin-git";
-              src = pkgs.fishPlugins.plugin-git.src;
-            }
-          ];
+          nix-direnv.enable = true;
+        };
+        nushell = {
+          enable = true;
+          extraConfig =
+            # nu
+            ''
+              let carapace_completer = {|spans: list<string>|
+                ^${lib.getExe pkgs.carapace} $spans.0 nushell ...$spans
+                | from json
+                | if ($in | default [] | where value == $"($spans | last)ERR" | is-empty) { $in } else { null }
+              }
+
+              let nix_completer = {|spans: list<string>|
+                let current_arg = $spans | length| $in - 1
+                with-env { NIX_GET_COMPLETIONS: $current_arg } { $spans| skip 1| ^nix ...$in }
+                | lines
+                | skip 1
+                | parse "{value}\t{description}"
+              }
+
+              let external_completer = {|spans|
+                let expanded_alias = scope aliases
+                | where name == $spans.0
+                | get -i 0.expansion
+
+                let spans = if $expanded_alias != null {
+                  $spans
+                  | skip 1
+                  | prepend ($expanded_alias | split row ' ' | take 1)
+                } else {
+                  $spans
+                }
+
+                match $spans.0 {
+                  nix => $nix_completer
+                  _ => $carapace_completer
+                } | do $in $spans
+              }
+
+              $env.config = {
+                show_banner: false
+                table: { mode: "psql" }
+                completions: {
+                  case_sensitive: false
+                  external: {
+                    enable: true
+                    max_results: 100
+                    completer: $external_completer
+                  }
+                }
+              }
+
+              source ${nu_scripts}/aliases/git/git-aliases.nu
+              ${mkCompletions ["git" "man" "rg" "tar"]}
+            '';
         };
-        nix-index.enable = true;
-        nix-index-database.comma.enable = true;
         starship.enable = true;
       };
-
-      services.vscode-server.enable = true;
     };
   };
 }