How to use gulp-watch to track exactly which file has changed?

Question

JavaScript

watch('styles/*.less', function() {
    gulp.start('style');
  });

I watch all the .less files in the 'styles/' directory.
If one changes, I run the 'style' job.
Is there any way to get the name and path of the changed file and run the job only relative to it?

Answer 1

https://github.com/gulpjs/gulp/blob/master/docs/API.md
gulp.watch can be assigned callback(event), through event we get the event type and file path.

Answer 2

You are not digging there. You only want to rebuild what has really changed, right?
Everyone wants this, and it's called "incremental build". There are simple recipes, there are not so much. To get started, I recommend watching Ilya Kantor's screencast: https://learn.javascript.ru/screencast/gulp