Add example and tests for JavaScript directory option

Author: totoroot

examples/javascript-directory/.gitignore

@@ -0,0 +1,9 @@
+# Devenv
+.devenv*
+devenv.local.nix
+devenv.lock
+
+# Node.js and bun
+node_modules
+package-lock.json
+bun.lockb

examples/javascript-directory/.test.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+set -ex
+cd directory
+node -e "require('axios')"

examples/javascript-directory/devenv.nix

@@ -0,0 +1,18 @@
+{ pkgs, lib, ... }:
+
+{
+  languages.javascript = {
+    enable = true;
+    directory = "directory";
+    package = pkgs.nodejs-slim;
+    bun = {
+      enable = true;
+      install.enable = true;
+    };
+    # npm = {
+    #   enable = true;
+    #   install.enable = true;
+    # };
+    corepack.enable = true;
+  };
+}

examples/javascript-directory/devenv.yaml

@@ -0,0 +1,3 @@
+inputs:
+  nixpkgs:
+    url: github:NixOS/nixpkgs/nixpkgs-unstable

examples/javascript-directory/directory/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "javascript",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "axios": "^1.4.0"
+  }
+}

src/modules/languages/javascript.nix

@@ -80,8 +80,12 @@ in
     directory = lib.mkOption {
       type = lib.types.str;
       default = config.devenv.root;
-      description = "The JavaScript project's root directory. Defaults to the root of the devenv project.";
-      example = "./frontend";
+      defaultText = lib.literalExpression "config.devenv.root";
+      description = ''
+        The JavaScript project's root directory. Defaults to the root of the devenv project.
+        Can be an absolute path or one relative to the root of the devenv project.
+      '';
+      example = "./directory";
     };
 
     package = lib.mkOption {