Cloud Build Client Libraries

This page shows how to get started with the Cloud Client Libraries for the Cloud Build API. However, we recommend using the older Google APIs Client Libraries if running on Google App Engine standard environment. Read more about the client libraries for Cloud APIs in Client Libraries Explained.

Installing the client library

Java

For more information, see Setting Up a Java Development Environment.

If you are using Maven, add this to your pom.xml file:

<dependency>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-build</artifactId>
    <version>2.2.2</version>
</dependency>

If you are using Gradle, add this to your dependencies:

compile group: 'com.google.cloud', name: 'google-cloud-build', version: '2.2.2'

Node.js

For more information, see Setting Up a Node.js Development Environment.

npm install --save @google-cloud/cloudbuild

Python

For more information, see Setting Up a Python Development Environment.

pip install --upgrade google-cloud-build

Setting up authentication

To run the client library, you must first set up authentication by creating a service account and setting an environment variable. Complete the following steps to set up authentication. For other ways to authenticate, see the GCP authentication documentation.

Cloud Console

Create a service account:

  1. In the Cloud Console, go to the Create service account page.

    Go to Create service account
  2. Select a project.
  3. In the Service account name field, enter a name. The Cloud Console fills in the Service account ID field based on this name.

    In the Service account description field, enter a description. For example, Service account for quickstart.

  4. Click Create.
  5. Click the Select a role field.

    Under Quick access, click Basic, then click Owner.

  6. Click Continue.
  7. Click Done to finish creating the service account.

    Do not close your browser window. You will use it in the next step.

Create a service account key:

  1. In the Cloud Console, click the email address for the service account that you created.
  2. Click Keys.
  3. Click Add key, then click Create new key.
  4. Click Create. A JSON key file is downloaded to your computer.
  5. Click Close.

Command line

You can run the following commands using the Cloud SDK on your local machine, or in Cloud Shell.

  1. Create the service account. Replace NAME with a name for the service account.

    gcloud iam service-accounts create NAME
  2. Grant permissions to the service account. Replace PROJECT_ID with your project ID.

    gcloud projects add-iam-policy-binding PROJECT_ID --member="serviceAccount:NAME@PROJECT_ID.iam.gserviceaccount.com" --role="roles/owner"
  3. Generate the key file. Replace FILE_NAME with a name for the key file.

    gcloud iam service-accounts keys create FILE_NAME.json --iam-account=NAME@PROJECT_ID.iam.gserviceaccount.com

Provide authentication credentials to your application code by setting the environment variable GOOGLE_APPLICATION_CREDENTIALS. This variable only applies to your current shell session, so if you open a new session, set the variable again.

Linux or macOS

export GOOGLE_APPLICATION_CREDENTIALS="KEY_PATH"

Replace KEY_PATH with the path of the JSON file that contains your service account key.

For example:

export GOOGLE_APPLICATION_CREDENTIALS="/home/user/Downloads/service-account-file.json"

Windows

For PowerShell:

$env:GOOGLE_APPLICATION_CREDENTIALS="KEY_PATH"

Replace KEY_PATH with the path of the JSON file that contains your service account key.

For example:

$env:GOOGLE_APPLICATION_CREDENTIALS="C:\Users\username\Downloads\service-account-file.json"

For command prompt:

set GOOGLE_APPLICATION_CREDENTIALS=KEY_PATH

Replace KEY_PATH with the path of the JSON file that contains your service account key.

Using the client library

The following example shows how to use the client library.

Node.js

async function quickstart(
  projectId = 'YOUR_PROJECT_ID', // Your Google Cloud Platform project ID
  triggerId = 'YOUR_TRIGGER_ID', // UUID for build trigger.
  branchName = 'BRANCH_TO_BUILD' // Branch to run build against.
) {
  // Imports the Google Cloud client library
  const {CloudBuildClient} = require('@google-cloud/cloudbuild');

  // Creates a client
  const cb = new CloudBuildClient();

  // Starts a build against the branch provided.
  const [resp] = await cb.runBuildTrigger({
    projectId,
    triggerId,
    source: {
      projectId,
      dir: './',
      branchName,
    },
  });
  console.info(`triggered build for ${triggerId}`);
  const [build] = await resp.promise();

  const STATUS_LOOKUP = [
    'UNKNOWN',
    'Queued',
    'Working',
    'Success',
    'Failure',
    'Error',
    'Timeout',
    'Cancelled',
  ];
  for (const step of build.steps) {
    console.info(
      `step:\n\tname: ${step.name}\n\tstatus: ${STATUS_LOOKUP[build.status]}`
    );
  }
}

Python

import google.auth
from google.cloud.devtools import cloudbuild_v1


def quickstart():
    """Create and execute a simple Google Cloud Build configuration,
    print the in-progress status and print the completed status."""

    # Authorize the client with Google defaults
    credentials, project_id = google.auth.default()
    client = cloudbuild_v1.services.cloud_build.CloudBuildClient()

    build = cloudbuild_v1.Build()

    # The following build steps will output "hello world"
    # For more information on build configuration, see
    # https://cloud.google.com/build/docs/configuring-builds/create-basic-configuration
    build.steps = [{"name": "ubuntu",
                    "entrypoint": "bash",
                    "args": ["-c", "echo hello world"]}]

    operation = client.create_build(project_id=project_id, build=build)
    # Print the in-progress operation
    print("IN PROGRESS:")
    print(operation.metadata)

    result = operation.result()
    # Print the completed status
    print("RESULT:", result.status)

Additional resources