export gulp

[tkellen]

If you mandate that gulp is exported from gulpfiles, users can easily require them and run tasks directly from their code without the cli.

[tkellen]

Also, it would probably be a good practice to mandate that people make their own instance of gulp in a gulpfile. The current gulpfile configuration format mutates the required gulp globally.

[phated]

I believe it was a design decision early on to make the gulp module export a singleton. Being a singleton lets you require('gulp') anywhere and add or execute any tasks.

[yocontra]

I made the decision early on to make the default usage of gulp be a singleton, but allow people to create custom instances if they need to (via new gulp.Gulp. This was done for ease of use and fits the most common case well.

[yocontra]

Closing in favor of #355