Enable Nushell and Carapace

Add nushell and some basic settings so that it works politely
Add carapace configuration to both nushell and Xonsh

home/baseline/default.nix

@@ -6,6 +6,7 @@
     ./bash.nix
     ./direnv.nix
     ./git.nix
+    ./nushell.nix
     ./ssh.nix
     ./vim
     ./xonsh.nix

home/baseline/nushell.nix

@@ -0,0 +1,39 @@
+{
+  config,
+  lib,
+  ...
+}:
+{
+  programs = {
+    carapace = {
+      enable = true;
+      enableNushellIntegration = true;
+    };
+    nushell = {
+      enable = true;
+      environmentVariables = {
+        AWS_SHARED_CREDENTIALS_FILE = "/run/agenix/cache-credentials";
+        GOPATH = "${config.home.homeDirectory}/src/go";
+        GOBIN = "${config.home.homeDirectory}/src/bin";
+        LIBMYSQL_ENABLE_CLEARTEXT_PLUGIN = "1";
+        SWORD_PATH = "${config.home.homeDirectory}/.sword/";
+        TIMEFORMAT = "%3Uu %3Ss %3lR %P%%";
+        VIRTUALENV_HOME = "${config.home.homeDirectory}/venv/";
+      };
+      extraConfig = ''
+        use std/util "path add"
+        path add ${config.home.homeDirectory}/src/bin
+        path add /opt/homebrew/bin
+        path add /run/current-system/sw/bin
+        path add ${config.home.homeDirectory}/.nix-profile/bin
+      '';
+      settings = {
+        buffer_editor = lib.getExe config.programs.nixvim.package;
+      };
+    };
+    starship = {
+      enable = true;
+      enableNushellIntegration = true;
+    };
+  };
+}

home/baseline/xonsh.nix

@@ -10,12 +10,19 @@
     nvd
   ];
 
-  programs.xonsh = {
+  programs = {
+    carapace = {
+      enable = true;
+    };
+
+    xonsh = {
       enable = true;
 
       sessionVariables = {
         # This is for pushing builds to my local S3 cache
         AWS_SHARED_CREDENTIALS_FILE = "/run/agenix/cache-credentials";
+        CARAPACE_BRIDGES = "zsh,bash";
+        COMPLETIONS_CONFIRM = "True";
         CLICOLOR = 1;
         EDITOR = "nvim";
         # vte_new_tab_cwd causes new Terminal tabs to open in the
@@ -93,4 +100,5 @@
           "    $NIX_LD = fp.read().strip()"
         ]);
     };
+  };
 }

home/baseline/xonsh_footer.xsh

@@ -129,3 +129,5 @@ import builtins
 builtins.true = True
 builtins.false = False
 builtins.null = None
+
+exec($(carapace _carapace xonsh))