使用gulp / gulp-watch-less自动编译较less文件的bootstrap不会重新生成css

我已经安装了nodejs和gulp来使用gulp-watch-less模块​​自动编译bootstrap less文件（v 3.3.5）。

一切正常工作期望一件事：我必须停止并开始吞咽重新生成bootstrap.css 。

有关信息，Gulp正在检测包含在bootstrap.less中的.less文件被修改，我有以下消息： 

[23:14:40] Starting 'default'... [23:14:42] Finished 'default' after 2.04 s [23:16:42] LESS saw variable-overrides.less was changed [23:16:42] LESS saw variable-overrides.less was changed [23:16:42] LESS saw bootstrap.less was changed:by:import [23:16:42] LESS saw bootstrap.less was changed:by:import

但是，当我打开bootstrap.css文件，我看不到变化，直到我停下来，再次开始吞咽。

这里是我的gulpfile.js的内容： 

 var gulp = require('gulp'); var watchLess = require('gulp-watch-less'); var less = require('gulp-less'); gulp.task('default', function () { return gulp.src('./../../../../drupal8/sandbox/felicity/themes/octogone/less/bootstrap.less') .pipe(watchLess('./../../../../drupal8/sandbox/felicity/themes/octogone/less/bootstrap.less')) .pipe(less()) .pipe(gulp.dest('./../../../../drupal8/sandbox/felicity/themes/octogone/css')); });

这段代码来自于gulp-watch-less页面

有人可以解释为什么bootstrap.css不会自动重新生成吗？

我已经通过使用gulp-watch-less2解决了这个问题

Gulp-watch-less与gulp 3.9不兼容

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