Possiblity to add conditional tasks

[lowik]

To write something like this

gulp.task('compile', function() {
    var enableLint = !args['disable-lint'];
    return runSequence(
        enableLint && 'lint',
        'babel',
        'copy'
    );
}

[OverZealous]

This has come up before. I still don't agree with it.

• It's extremely easy to handle within your code, and I don't think it's necessary to have the logic within run-sequence.
• It also opens the door to silent errors which are hard-to-impossible to track down.
• I don't really agree with ignoring empty parallel task arrays, in any case.

I might be tempted to allow strict false or a valid task, but no other values (undefined/0/''). By explicitly requiring strict equality with false, it's a lot harder to have a silent error. Even then I'm not sure I want to go this route.

[yairEO]

@lowik - Thank you very much! I will erase @OverZealous's code and use yours swiftly.

@OverZealous - This blog post is for you.

[OverZealous]

I've decided I'm not going to implement this.