Debug gulp stream content

debug-gulp-stream-content.js

var through = require('through2');

function task () {
  return gulp.src([ some, files ])
    .pipe(concat('app.css'))
    .pipe(through.obj(function (chunk, enc, callback) {
      console.log(chunk.contents.toString())
      this.push(chunk);
      callback();
    }));
}