glob can be an array of strings

gulp-watch/gulp-watch-tests.ts

@@ -17,3 +17,14 @@ gulp.task('callback', (cb) =>
             .on('end', cb)
     )
 );
+
+gulp.task('build', () => {
+    var files = [
+        'app/**/*.ts',
+        'lib/**/*.ts',
+        'components/**/*.ts',
+    ];
+
+    gulp.src(files, { base: '..' })
+        .pipe(watch(files, { base: '..' }));
+});

gulp-watch/gulp-watch.d.ts

@@ -21,7 +21,7 @@ declare module 'gulp-watch' {
         close(): NodeJS.ReadWriteStream;
     }
 
-    function watch(glob: string, options?: IOptions, callback?: Function): IWatchStream;
+    function watch(glob: string | Array<string>, options?: IOptions, callback?: Function): IWatchStream;
 
     export = watch;
 }