nixos/kubeswitch: init

Add a module to activate the kubeswitch in the shell

nixos/modules/module-list.nix

@@ -214,6 +214,7 @@
   ./programs/kclock.nix
   ./programs/kdeconnect.nix
   ./programs/lazygit.nix
+  ./programs/kubeswitch.nix
   ./programs/less.nix
   ./programs/liboping.nix
   ./programs/light.nix

nixos/modules/programs/kubeswitch.nix

@@ -0,0 +1,56 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  cfg = config.programs.kubeswitch;
+in
+{
+  options = {
+    programs.kubeswitch = {
+      enable = lib.mkEnableOption (lib.mdDoc "kubeswitch");
+
+      commandName = lib.mkOption {
+        type = lib.types.str;
+        default = "kswitch";
+        description = "The name of the command to use";
+      };
+
+      package = lib.mkOption {
+        type = lib.types.package;
+        default = pkgs.kubeswitch;
+        defaultText = lib.literalExpression "pkgs.kubeswitch";
+        description = "The package to install for kubeswitch";
+      };
+    };
+  };
+
+  config =
+    let
+      shell_files = pkgs.stdenv.mkDerivation rec {
+        name = "kubeswitch-shell-files";
+        phases = [ "installPhase" ];
+        installPhase = ''
+          mkdir -p $out/share
+          for shell in bash zsh; do
+            ${cfg.package}/bin/switcher init $shell | sed 's/switch(/${cfg.commandName}(/' > $out/share/${cfg.commandName}_init.$shell
+            ${cfg.package}/bin/switcher --cmd ${cfg.commandName} completion $shell > $out/share/${cfg.commandName}_completion.$shell
+          done
+        '';
+      };
+    in
+    lib.mkIf cfg.enable {
+      environment.systemPackages = [ cfg.package ];
+
+      programs.bash.interactiveShellInit = ''
+        source ${shell_files}/share/${cfg.commandName}_init.bash
+        source ${shell_files}/share/${cfg.commandName}_completion.bash
+      '';
+      programs.zsh.interactiveShellInit = ''
+        source ${shell_files}/share/${cfg.commandName}_init.zsh
+        source ${shell_files}/share/${cfg.commandName}_completion.zsh
+      '';
+    };
+}