transformPath is never called

[pesochek]

Consider running following task. Manifest file is generated, but no paths are changed and nothing is shown in console.

'use strict';

const gulp          = require('gulp');
const revAll        = require('gulp-rev-all');

const dirAssets = 'dist/static pages/dist';

gulp.task('revision:assets', () => {
    return gulp.src(`${dirAssets}/**/*.{css,js}`)
        .pipe(revAll.revision({
            transformPath: (rev, source, path) => {
                console.log('transformPath()', rev, source, path);
                return rev.replace(/(css|js)\//, '/dist/$1/');
            }
        }))
        .pipe(gulp.dest(dirAssets))
        .pipe(revAll.manifestFile())
        .pipe(gulp.dest(dirAssets));
});

I'm locked to these versions of node/npm if it matters:

$ node -v
v5.12.0
$ npm -v
3.8.6

[Eduardo-Julio]

Can confirm, its never being called