Using Yarn on App Engine
Contributed by Google employees.
Yarn is a package management tool that makes it easy and fast to install npm modules for Node.js.
You can use Yarn to manage your Node.js dependencies on App Engine flexible environment. This tutorials provides a quick demonstration.
Objectives
- Install Yarn.
- Manage Node.js dependencies with Yarn.
- Use Yarn to install dependencies during deployment to App Engine.
Costs
This tutorial uses billable components of Google Cloud, including:
- App Engine flexible environment
Use the Pricing Calculator to generate a cost estimate based on your projected usage.
Before you begin
- Create a project in the Cloud Console.
- Enable billing for your project.
- Install the Cloud SDK.
Getting started
Install Yarn by following the installation instructions.
To install a package and automatically save it to your
package.jsonrun:yarn add PACKAGEFor example, to install and save the
google-cloudpackage:yarn add google-cloudRunning this command will save the dependency into your
package.json, and create ayarn.lockfile in the current directory. Don't delete this file! It will track the exact version of every package you need to run your application.
Deploying to App Engine
To use Yarn for your deployments to App Engine flexible environment, all you
need is a yarn.lock in your application directory. Then, just deploy:
gcloud app deploy
If App Engine finds a yarn.lock in the application directory, Yarn will be
used to perform the npm installation. Learn more about the Node.js runtime for App Engine flexible environment.
And that's it!
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