gulp end callback not called

I'm having trouble setting up a simple task on gulp. I want to pass the files through gulp-babel to run a script, but the end callback is never called.

I also tried finish. The only callback called is data, but it doesn't work for me because I need to run it after all the files ran through babel.

gulp-debug shows the files have been correctly found.

Any toughts?

(function () {
    'use strict';

    var gulp = require('gulp'),
        babel = require('gulp-babel'),
        debug = require('gulp-debug');


    gulp.task('parseReviews', function () {
        gulp.src(['scripts/parseReviews.js', 'src/**/*.js'])
        .pipe(debug())
        .pipe(babel())
        .on('end', function () {
            const foo = require('../../scripts/parseReviews');
            console.log(foo);
        });
    });
})();

You need to return your stream from your task:

gulp.task('parseReviews', function () {
  return gulp.src(['scripts/parseReviews.js', 'src/**/*.js'])
    .pipe(debug())
    .pipe(babel())
    .on('end', function () {
        const foo = require('../../scripts/parseReviews');
        console.log(foo);
    });
});