Javascript Gulp复制任务完成后如何执行notify？

我的

gulpfile.js

中有一个

copy

任务，我想在复制完成后通知（

gulp notify

），现在，当我执行

copy

任务时，

notify

函数被多次调用

const notify = require('gulp-notify')
    , gulp = require('gulp')
    ;

gulp.task('copy', copyTask);

function copyTask() {
    return gulp.src('src/**/*')
        .pipe(gulp.dest('dest'))
        .pipe(notify('Copy task is completed!'));
}

在我的终端：

[13:23:40] Starting 'copy'...
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.
[13:23:40] gulp-notify: [Gulp notification] Copy task is completed.

如何解决此问题，以便在

gulp.dest

完成后仅执行时间？

您可以使用：

function copyTask() {
  return gulp.src('src/**/*')
    .pipe(gulp.dest('dest'))
    .pipe(notify({
      message: 'Copy task is completed!',
      onLast: true
    }));
}