Create clean task

Author: devbanana

gulpfile.ts

@@ -2,6 +2,7 @@
 
 import { dest, watch } from 'gulp';
 import * as ts from 'gulp-typescript';
+import * as del from 'del';
 
 const project = ts.createProject('tsconfig.json');
 
@@ -12,3 +13,9 @@ export function compile(): NodeJS.ReadWriteStream {
 export function monitor(): NodeJS.EventEmitter {
   return watch('src/**/*.ts', compile);
 }
+
+export function clean(): Promise<void> {
+  return del(['build/**/*.js', 'build/**/*.d.ts']).then(paths => {
+    paths.forEach(path => console.log(`Deleted ${path}`));
+  });
+}

package-lock.json

@@ -23,6 +23,7 @@
     "@types/node": "^16.10.1",
     "@typescript-eslint/eslint-plugin": "^4.31.2",
     "@typescript-eslint/parser": "^4.31.2",
+    "del": "^6.0.0",
     "eslint": "^7.32.0",
     "eslint-config-prettier": "^8.3.0",
     "gulp": "^4.0.2",