Question

145

Set gulp tasks depending on NODE_ENV

rated 0 times [ 151] [ 6] / answers: 1 / hits: 22442 / 9 Years ago, tue, march 24, 2015, 12:00:00

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?

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janettejordynm

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answered 9 Years ago kaleefridad · Accepted 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.