chore(Hexo): add event emitter descriptor (#5302)

Co-authored-by: uiolee <[email protected]>

lib/hexo/index.ts

@@ -145,6 +145,88 @@ declare module 'module' {
     _cache: any;
 }
 
+interface Hexo {
+
+  /**
+   * Emitted before deployment begins.
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#deployBefore
+   */
+  on(event: 'deployBefore', listener: (...args: any[]) => any): this;
+
+  /**
+   * Emitted after deployment begins.
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#deployAfter
+   */
+  on(event: 'deployAfter', listener: (...args: any[]) => any): this;
+
+  /**
+   * Emitted before Hexo exits.
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#exit
+   */
+  on(event: 'exit', listener: (...args: any[]) => any): this;
+
+  /**
+   * Emitted before generation begins.
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#generateBefore
+   */
+  on(event: 'generateBefore', listener: (...args: any[]) => any): this;
+
+  /**
+   * Emitted after generation finishes.
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#generateAfter
+   */
+  on(event: 'generateAfter', listener: (...args: any[]) => any): this;
+
+  /**
+   * Emitted after a new post has been created. This event returns the post data:
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#new
+   */
+  on(event: 'new', listener: (post: { path: string; content: string; }) => any): this;
+
+  /**
+   * Emitted before processing begins. This event returns a path representing the root directory of the box.
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#processBefore
+   */
+  on(event: 'processBefore', listener: (...args: any[]) => any): this;
+
+  /**
+   * Emitted after processing finishes. This event returns a path representing the root directory of the box.
+   * @param event
+   * @param listener
+   * @link https://hexo.io/api/events.html#processAfter
+   */
+  on(event: 'processAfter', listener: (...args: any[]) => any): this;
+
+  /**
+   * Emitted after initialization finishes.
+   * @param event
+   * @param listener
+   */
+  on(event: 'ready', listener: (...args: any[]) => any): this;
+
+  /**
+   * undescripted on emit
+   * @param event
+   * @param listener
+   */
+  on(event: string, listener: (...args: any[]) => any): any;
+  emit(event: string, ...args: any[]): any;
+}
+
 class Hexo extends EventEmitter {
   public base_dir: string;
   public public_dir: string;