CDK Github

Manage GitHub resources like repositories, teams, members, integrations and workflows with the AWS CDK as Custom Resources in CloudFormation with cdk-github.

You configure the endpoint, method and parameters documented by @octokit/rest and AWS CloudFormation runs them anytime you create, update (if you changed the custom resource), or delete stacks. When CloudFormation sends a lifecycle event notification, then your custom resource sends the request to the GitHub REST API.

Install

TypeScript

npm install @pepperize/cdk-github

or

yarn add @pepperize/cdk-github

Python

pip install pepperize.cdk-github

C#

dotnet add package Pepperize.CDK.Github

Java

<dependency>
  <groupId>com.pepperize</groupId>
  <artifactId>cdk-github</artifactId>
  <version>${cdkGithub.version}</version>
</dependency>

Contributing

Contributions of all kinds are welcome 🚀 Check out our contributor's guide.

For a quick start, fork and check out a development environment:

git clone git@github.com:pepperize/cdk-github
cd cdk-github
# install dependencies
yarn
# build with projen
yarn build

Getting Started

1. Creating a GitHub App

2. Installing GitHub Apps

3. Create an AWS Secrets Manager secret

   {
     "appId": "123456",
     "privateKey": "-----BEGIN RSA PRIVATE KEY-----\nExample==\n-----END RSA PRIVATE KEY-----",
     "installationId": "12345678"
   }

4. Add @pepperize/cdk-github to your project dependencies

   yarn add @pepperize/cdk-github

5. Add your main.ts

   const app = new App();
   const stack = new Stack(app, "GithubCustomResources");

   Just for simplicity, it's up to you how to organize your app 😉

6. Import your secret

   const secret = secrets_manager.Secret.fromSecretNameV2(stack, "Auth", "cdk-github/github-token");

7. Configure GitHub App authenticate as an installation

   const authOptions = AuthOptions.appAuth(secret);

8. Add your first GitHub Custom Resource with the AWS CDK

   new GithubCustomResource(stack, "GithubRepo", {
     onCreate: {
       // 👇The endpoint of the GitHub API.
       endpoint: "repos",
       // 👇The method of the GitHub API.
       method: "createInOrg",
       // https://octokit.github.io/rest.js/v19/#repos-create-in-org
       parameters: {
         // 👇The request parameters to send.
         org: "pepperize",
         name: "cdk-github",
       },
       // 👇The object keys from the GitHub API response to return to CFN.
       outputPaths: ["id", "full_name"],
       // 👇This becomes the CFN Physical ID visible in the Console.
       physicalResourceId: custom_resources.PhysicalResourceId.fromResponse("full_name"),
       // 👇Don't throw an error if message matching this regex.
       ignoreErrorCodesMatching: "name already exists on this account",
     },
     // 👇The implemented authentication strategy.
     authOptions: AuthOptions.appAuth(secret),
   });

9. Deploy your first GitHub Custom Resource

   npx cdk deploy

Authentication

GitHub App or installation authentication

Configure the AWS SecretsManager Secret with the AuthOptions that will be passed to octokit.auth. i.e. as an installation:

{
  "appId": "123456",
  "privateKey": "-----BEGIN RSA PRIVATE KEY-----\nExample==\n-----END RSA PRIVATE KEY-----",
  "installationId": "12345678"
}

Lookup the secret in your AWS CDK app:

// 👇Lookup your secret containing the AuthOptions
const secret = secrets_manager.Secret.fromSecretNameV2(stack, "Auth", "cdk-github/github-token");
// 👇This will send the secret arn to the custom resource handler
const authOptions = AuthOptions.appAuth(secret);

The custom resource handler will configure octokit.js with the createAppAuth:

const getSecretValueResponse = await SSM.getSecretValue({ SecretId: secret }).promise();
const octokitOptions: OctokitOptions = {
  authStrategy: createAppAuth,
  auth: (auth = JSON.parse(getSecretValueResponse.SecretString)),
};

Supported through @octokit/auth-app

Personal Access Token authentication

Just add your PAT to an SSM StringParameter

// 👇Lookup your parameter containing the TOKEN
const parameter = ssm.StringParameter.fromStringParameterName(stack, "Auth", "cdk-github/github-token");
// 👇This will send the parameter arn to the custom resource handler
const authOptions = AuthOptions.tokenAuth(parameter);

Supported through @octokit/auth-token

Unauthenticated

// 👇This will configure octokit without authentication
const authOptions = AuthOptions.unauthenticated();

Manage a GitHub Repository - Example

@octokit/plugin-rest-endpoint-methods

const auth = secrets_manager.Secret.fromSecretNameV2(stack, "Auth", "cdk-github/github-token");

const repo = new GithubCustomResource(stack, "GithubRepo", {
  onCreate: {
    // https://octokit.github.io/rest.js/v19/#repos-create-in-org
    endpoint: "repos",
    method: "createInOrg",
    parameters: {
      org: "pepperize",
      name: "cdk-github",
    },
    outputPaths: ["id", "full_name"],
    physicalResourceId: custom_resources.PhysicalResourceId.fromResponse("full_name"),
    ignoreErrorCodesMatching: "name already exists on this account",
  },
  onUpdate: {
    // https://octokit.github.io/rest.js/v19#repos-get
    endpoint: "repos",
    method: "get",
    parameters: {
      owner: "pepperize",
      repo: "cdk-github",
    },
    outputPaths: ["id", "full_name"],
    physicalResourceId: custom_resources.PhysicalResourceId.fromResponse("full_name"),
  },
  onDelete: {
    // https://octokit.github.io/rest.js/v19#repos-delete
    endpoint: "repos",
    method: "delete",
    parameters: {
      owner: "pepperize",
      repo: "cdk-github",
    },
    outputPaths: [],
  },
  authOptions: AuthOptions.appAuth(auth),
});

// 👇 This will return the created repository id as a CDK Token
repo.getAtt("id");

Manage GitHub Actions Secrets

Environment Secret

Manages an environment secret. Will fetch the source AWS SecretsManager secret and encrypt it to store in GitHub.

// 👇The GitHub API authentication secret
const auth = secrets_manager.Secret.fromSecretNameV2(scope, "Auth", "cdk-github/github-token");

// 👇The AWS SecretsManager Secret to configure as GitHub Action secret.
const secret = secrets_manager.Secret.fromSecretNameV2(scope, "Secret", "any-secret/example");

new GithubActionsSecretEnvironment(scope, "GithubRepo", {
  // 👇The repository id, which you may lookup from the page source or via a custom resource
  repositoryId: "558989134",
  environmentName: "production",
  // 👇The name of the created GitHub secret
  secretName: "example",
  // 👇The source AWS SecretsManager secret and JSON field to use
  source: GithubActionsSecret.fromSecretsManager(secret, "some-json-field"),
  authOptions: AuthOptions.appAuth(auth),
  // 👇Whether to delete or retain the GitHub secret on resource removal
  removalPolicy: RemovalPolicy.DESTROY,
});

You may retrieve the repository_id from the GitHub Repository page source's meta tag i.e. <meta name="octolytics-dimension-repository_id" content="558989134"> or from another GithubCustomResource via getAtt().

See GitHub Developer Guide, API Reference

Organization Secret

Manage an GitHib Actions organization secret. Will fetch the source AWS SecretsManager secret and encrypt it to store in GitHub.

// 👇The GitHub API authentication secret
const auth = secrets_manager.Secret.fromSecretNameV2(scope, "Auth", "cdk-github/github-token");

// 👇The AWS SecretsManager Secret to configure as GitHub Action secret.
const secret = secrets_manager.Secret.fromSecretNameV2(scope, "Secret", "any-secret/example");

new GithubActionsSecretOrganization(scope, "GithubRepo", {
  organizationName: "pepperize",
  // 👇The name of the created GitHub secret
  secretName: "example",
  // 👇The source AWS SecretsManager secret and JSON field to use
  source: GithubActionsSecret.fromSecretsManager(secret, "some-json-field"),
  visibility: Visibility.ALL,
  authOptions: AuthOptions.appAuth(auth),
  // 👇Whether to delete or retain the GitHub secret on resource removal
  removalPolicy: RemovalPolicy.DESTROY,
});

See GitHub Developer Guide, API Reference

Repository Secret

Manage an GitHib Actions Repository secret. Will fetch the source AWS SecretsManager secret and encrypt it to store in GitHub.

// 👇The GitHub API authentication secret
const auth = secrets_manager.Secret.fromSecretNameV2(scope, "Auth", "cdk-github/github-token");

// 👇The AWS SecretsManager Secret to configure as GitHub Action secret.
const secret = secrets_manager.Secret.fromSecretNameV2(scope, "Secret", "any-secret/example");

new GithubActionsSecretRepository(scope, "GithubRepo", {
  owner: "pepperize",
  repositoryName: "cdk-github",
  // 👇The name of the created GitHub secret
  secretName: "example",
  // 👇The source AWS SecretsManager secret and JSON field to use
  source: GithubActionsSecret.fromSecretsManager(secret, "some-json-field"),
  authOptions: AuthOptions.appAuth(auth),
  // 👇Whether to delete or retain the GitHub secret on resource removal
  removalPolicy: RemovalPolicy.DESTROY,
});

See GitHub Developer Guide, API Reference