Bitbucket Authentication Provider

The Backstage core-plugin-api package comes with a Bitbucket authentication provider that can authenticate users using Bitbucket Cloud. This does NOT work with Bitbucket Server.

Create an OAuth Consumer in Bitbucket

To add Bitbucket Cloud authentication, you must create an OAuth Consumer.

Go to https://bitbucket.org/<your-project-name>/workspace/settings/api .

Click Add Consumer.

Settings for local development:

• Application name: Backstage (or your custom app name)
• Callback URL: http://localhost:7007/api/auth/bitbucket
• Other are optional
• (IMPORTANT) Permissions: Account - Read, Workspace membership - Read

Configuration

The provider configuration can then be added to your app-config.yaml under the root auth configuration:

auth:
  environment: development
  providers:
    bitbucket:
      development:
        clientId: ${AUTH_BITBUCKET_CLIENT_ID}
        clientSecret: ${AUTH_BITBUCKET_CLIENT_SECRET}
        signIn:
          resolvers:
            # See https://backstage.io/docs/auth/bitbucket/provider#resolvers for more resolvers
            - resolver: userIdMatchingUserEntityAnnotation

The Bitbucket provider is a structure with two configuration keys:

• clientId: The Key that you generated in Bitbucket, e.g. b59241722e3c3b4816e2
• clientSecret: The Secret tied to the generated Key.

Resolvers

This provider includes several resolvers out of the box that you can use:

• emailMatchingUserEntityProfileEmail: Matches the email address from the auth provider with the User entity that has a matching spec.profile.email. If no match is found it will throw a NotFoundError.
• emailLocalPartMatchingUserEntityName: Matches the local part of the email address from the auth provider with the User entity that has a matching name. If no match is found it will throw a NotFoundError.
• userIdMatchingUserEntityAnnotation: Matches the userId from the auth provider with the User entity that has a matching bitbucket.org/user-id annotation. If no match is found it will throw a NotFoundError.
• usernameMatchingUserEntityAnnotation: Matches the username from the auth provider with the User entity that has a matching bitbucket.org/username annotation. If no match is found it will throw a NotFoundError.

Note

The resolvers will be tried in order, but will only be skipped if they throw a NotFoundError.

If these resolvers do not fit your needs you can build a custom resolver, this is covered in the Building Custom Resolvers section of the Sign-in Identities and Resolvers documentation.

Backend Installation

To add the provider to the backend we will first need to install the package by running this command:

from your Backstage root directory

yarn --cwd packages/backend add @backstage/plugin-auth-backend-module-bitbucket-provider

Then we will need to add this line:

in packages/backend/src/index.ts

backend.add(import('@backstage/plugin-auth-backend'));
backend.add(import('@backstage/plugin-auth-backend-module-bitbucket-provider'));

Adding the provider to the Backstage frontend

To add the provider to the frontend, add the bitbucketAuthApi reference and SignInPage component as shown in Adding the provider to the sign-in page.