Gulp-rev different path in manifest.json

I am now trying to generate manifest.json file with gulp-rev. What I need is something like this:

     {
      "img/image.jpg": "folder/img/image-34c9d558b2.jpg";
}

How do I put that "folder" in path there? I was trying to use gulp-rev-collector but it was not very useful. Could someone give me an example please?

Thanks

What worked for me was using gulp-rename and then doing something like:

.pipe($.rename({
  dirname: 'styles',
}))
.pipe($.rev.manifest('manifest.json', {
  cwd: 'build',
  merge: true,
}))

However, what ultimately worked for me was using gulp-rev in combination with gulp-rev-collector, the latter which replaces the links as per the mappings found in the manifest files.

So something like:

.pipe($.rename({
  dirname: 'styles',
}))
.pipe($.rev())
.pipe(gulp.dest('build'))
.pipe(gulp.dest('.tmp/styles'))
.pipe($.rev.manifest())
.pipe(gulp.dest('build/styles'));

And also adding a new rev task for gulp-rev-collector

// Revision static asset files
gulp.task('rev', () =>
  gulp.src(['build/**/rev-manifest.json', 'build/*.html'])
    .pipe($.revCollector())
    .pipe(gulp.dest('build')),
);