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Google Cloud Functions Emulator

Disclaimer: This is not an official Google product.

What is it?

The Google Cloud Functions Emulator is a Node.js application that implements the Google Cloud Functions API, and includes a CLI for interacting with the application.

The Emulator allows you to deploy, run, and debug your Cloud Functions on your local machine before deploying them to the production Google Cloud Functions service.

How do I get started?

1. Sign up for the Google Cloud Functions Alpha and explore the Cloud Functions Documentation.

2. Write a function:

    mkdir helloworld
    cd helloworld
    touch index.js
    echo 'exports.helloWorld = (req, res) => res.send("Hello, World!");' > index.js
   

3. Install the Emulator:

   NPM:

    npm install -g @google-cloud/functions-emulator
   

   Yarn:

    yarn global add @google-cloud/functions-emulator
   

   Or read more in the detailed installation instructions.

4. Start the Emulator:

    functions start
   

5. Deploy your function:

    functions deploy helloWorld --trigger-http
   

6. Call your function:

    functions call helloWorld
   

   which should print:

    Hello, World!
   

7. View the logs:

    functions logs read