feat: support auth shortcut for layer config (resolves #142)

README.md

@@ -245,7 +245,7 @@ Layers:
 ]
 ```
 
-## Extending Config Layer from Remote Sources
+## Extending config layer from remote sources
 
 You can also extend configuration from remote sources such as npm or github.
 
@@ -269,15 +269,17 @@ export default {
 };
 ```
 
-**Example:** Extend with clone configuration
+**Example:** Extend a private repository and install dependencies:
 
 ```js
 // config.ts
 export default {
- extends: ["gh:user/repo", { giget: { auth: process.env.GITHUB_TOKEN } }],
+ extends: ["gh:user/repo", { auth: process.env.GITHUB_TOKEN, install: true }],
 };
 ```
 
+You can pass more options to `giget: {}` in layer config.
+
 Refer to [unjs/giget](https://giget.unjs.io) for more information.
 
 ## Environment-specific configuration
@@ -310,7 +312,7 @@ c12 tries to match [`envName`](#envname) and override environment config if spec
 }
 ```
 
-## Watching Configuration
+## Watching configuration
 
 you can use `watchConfig` instead of `loadConfig` to load config and watch for changes, add and removals in all expected configuration paths and auto reload with new config.
 

src/loader.ts

@@ -303,6 +303,7 @@ async function resolveConfig<
  dir: cloneDir,
  install: sourceOptions.install,
  force: sourceOptions.install,
+ auth: sourceOptions.auth,
  ...options.giget,
  ...sourceOptions.giget,
  });

src/types.ts

@@ -30,11 +30,34 @@ export interface SourceOptions<
  T extends UserInputConfig = UserInputConfig,
  MT extends ConfigLayerMeta = ConfigLayerMeta,
 > {
+ /** Custom meta for layer */
  meta?: MT;
- giget?: DownloadTemplateOptions;
- install?: boolean;
+
+ /** Layer config overrides */
  overrides?: T;
+
  [key: string]: any;
+
+ /**
+ * Options for cloning remote sources
+ *
+ * @see https://giget.unjs.io
+ */
+ giget?: DownloadTemplateOptions;
+
+ /**
+ * Install dependencies after cloning
+ *
+ * @see https://nypm.unjs.io
+ */
+ install?: boolean;
+
+ /**
+ * Token for cloning private sources
+ *
+ * @see https://giget.unjs.io#providing-token-for-private-repositories
+ */
+ auth?: string;
 }
 
 export interface ConfigLayer<