Processs newer images only

It would be very helpful to have an option to only process files that do not exist in dest, or that are newer than those in dest.

I tried piping through gulp-newer but got the following error: Expected a source file with stats

[mahnunchik]

Hi @TxHawks @mvasin

gulp-cached works like a charm! It supports the necessary 1:many relations between files.

gulp-changed supports only 1:1 gulp-newer supports 1:1 and many:1

But you have to set errorOnUnusedConfig option to false because there will be unused configurations for not updated files.

My test case:

'use strict';

var gulp = require('gulp');
var $ = require('gulp-load-plugins')();
// gulp-responsive
// gulp-cached
// gulp-debug

gulp.task('default', ['images'], function() {
  gulp.watch('src/*.jpg', ['images']);
});

gulp.task('images', function() {
  return gulp.src('src/*.jpg')
    .pipe($.debug({title: 'sources:'}))
    .pipe($.cached('images'))
    .pipe($.debug({title: 'before gulp-responsive:'}))
    .pipe($.responsive({
      'image.jpg': [{
        width: 200,
        rename: 'img-200.jpg'
      }, {
        width: 400,
        rename: 'img-400.jpg'
      }, {
        width: 600,
        rename: 'img-600.jpg'
      }]
    }, {
      errorOnUnusedConfig: false
    }))
    .pipe($.debug({title: 'after gulp-responsive:'}))
    .pipe(gulp.dest('dist'));
});

[mahnunchik]

Landed version 2.0 of gulp-responsive

Feedback welcome 😉