nixos/git-worktree-switcher: init git-worktree-switcher

This module sets up shells so that they work with
[git-worktree-switcher](https://github.com/mateusauler/git-worktree-switcher)

nixos/doc/manual/release-notes/rl-2411.section.md

@@ -197,6 +197,8 @@
 
 - [Zapret](https://github.com/bol-van/zapret), a DPI bypass tool. Available as [services.zapret](option.html#opt-services.zapret.enable).
 
+- [git-worktree-switcher](https://github.com/mateusauler/git-worktree-switcher), switch between git worktrees with speed.
+
 ## Backward Incompatibilities {#sec-release-24.11-incompatibilities}
 
 - Nixpkgs now requires Nix 2.3.17 or newer to allow for zstd compressed binary artifacts.

nixos/modules/programs/git-worktree-switcher.nix

@@ -0,0 +1,36 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+let
+  prg = config.programs;
+  cfg = prg.git-worktree-switcher;
+
+  bashInitScript = ''
+    eval "$(command ${pkgs.git-worktree-switcher}/bin/wt init bash)"
+  '';
+  zshInitScript = ''
+    eval "$(command ${pkgs.git-worktree-switcher}/bin/wt init zsh)"
+  '';
+  fishInitScript = ''
+    eval "$(command ${pkgs.git-worktree-switcher}/bin/wt init zsh)"
+  '';
+in
+{
+  options = {
+    programs.git-worktree-switcher = {
+      enable = lib.mkEnableOption "git-worktree-switcher, switch between git worktrees with speed.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [ git-worktree-switcher ];
+
+    programs.bash.interactiveShellInit = bashInitScript;
+    programs.zsh.interactiveShellInit = lib.mkIf prg.zsh.enable zshInitScript;
+    programs.fish.interactiveShellInit = lib.mkIf prg.fish.enable fishInitScript;
+  };
+}