cusejuice cusejuice - 1 month ago 13
Node.js Question

Set gulp tasks depending on NODE_ENV

Is there a way to specify a gulp task depending on the

NODE_ENV
that is set?

For example in my
package.json
file, I have something like:

"scripts": {
"start": "gulp"
}


And I have multiple
gulp
tasks

gulp.task('development', function(){
// run dev related tasks like watch
});

gulp.task('production', function(){
// run prod related tasks
});


If I set
NODE_ENV=production npm start
, can I specify to only run
gulp production
? Or is there a better way to do this?

Answer

Using a single ternary in your default gulp task, you can have something like:

gulp.task('default',
  [process.env.NODE_ENV === 'production' ? 'production' : 'development']
);

You will then be able to keep the single gulp command in your package.json and using this like you said:

NODE_ENV=production npm start

Any other value of your NODE_ENV variable will launch the development task.


You could of course do an advanced usage using an object allowing for multiple tasks and avoiding if trees hell:

var tasks = {
  development: 'development',
  production: ['git', 'build', 'publish'],
  preprod: ['build:preprod', 'publish:preprod'],
  ...
}

gulp.task('default', tasks[process.env.NODE_ENV] || 'fallback')

Keep in mind that when giving an array of tasks, they will be run in parallel.