完成复制任务后如何执行通知？

Question

我的gulpfile.js中有一个gulpfile.js任务，我希望在复制完成后通知(gulp-notify)，现在，当我执行copy任务时，会多次调用notify函数。

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!'));
}

在我的终点站：

[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.

在gulp.dest完成后，如何才能修复这个问题，只执行时间呢？

Answer 1

您可以使用 option

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