cdk-app

The operator CLI for CDK apps. Experimental.

cdk-app lets you associate commands with CDK constructs so that you can quickly invoke functions, redrive queues, visit resources in the AWS console, and more by just referencing the construct name.

Examples:

• cdk-app MyLambda tail-logs - stream logs in real time from the Lambda's log group
• cdk-app TransactionTable visit-console - open the AWS console page for your table
• cdk-app OrderQueue redrive-queue - retry messages that failed to get processed

🚀 Getting Started

Create a CDK app with a Lambda function, and deploy it to your AWS account.

const fn = new lambda.Function(this, 'MyLambda', {
  code: lambda.Code.fromInline("exports.handler = async (event) => { console.log('event: ', event) };"),
  handler: 'index.handler',
  runtime: lambda.Runtime.NODEJS_14_X,
});

Next, npm install -g cdk-app-cli and view the available commands:

$ cdk-app MyLambda
Commands:
  describe
  invoke
  visit-console
  audit-console

Run a command to instantly access the construct in the AWS console:

$ cdk-app MyLambda visit-console

Or run a command to get information in your command line:

$ cdk-app MyLambda describe
> aws lambda get-function --function-name DemoAppStack-MyLambdaCCE802FB-lELPCJlktCim
{
    "Configuration": {
        "FunctionName": "DemoAppStack-MyLambdaCCE802FB-lELPCJlktCim",
        ...

Any extra arguments you pass will get automatically passed through to the underlying command.

You can add your own commands by defining a JSON or YAML file in your CDK app named construct-commmands. For example, here we define some commands that use the awslogs CLI:

# construct-commands.yml
aws-cdk-lib.aws_lambda.Function:
  logs:
    exec: awslogs get /aws/lambda/${PHYSICAL_RESOURCE_ID} --start='5m ago'
  tail-logs:
    exec: awslogs get /aws/lambda/${PHYSICAL_RESOURCE_ID} ALL --watch

Now these commands will be available to use:

$ cdk-app MyLambda
Commands:
  describe
  invoke
  visit-console
  audit-console
  logs
  tail-logs

Try using cdk-app in scripts as well!

#!/usr/bin/env bash

declare -a arr=("MyLambda" "MyTable" "MyQueue")

for construct in "${arr[@]}"; do
  cdk-app "$construct" visit-console
done

📖 Documentation

Command line options

cdk-app [construct] [subcommand]

Run an operator command on your CDK app's constructs.

Positionals:
  construct                                                  [string] [required]
  subcommand                                                            [string]

Options:
  --version  Show version number                                       [boolean]
  --help     Show help                                                 [boolean]

Extra configuration options available via environment variables:

- CDK_APP_DIR - Path to cdk.out.
- AWS_REGION - AWS region to run commands in.

construct-commands.json

Command types

Type	Description
open	Specify a URL or file to open.
exec	Specify a command to run in your shell.

Command substitutions

Syntax	Description
${AWS_REGION}	The AWS_REGION of the current shell environment (e.g. us-east-1).
${PHYSICAL_RESOURCE_ID}	The physical resource ID of construct's default resource. A construct named "Default" or "Resource" will automatically be assumed to be the default.
${URL_ENCODED_PHYSICAL_RESOURCE_ID}	The same as ${PHYSICAL_RESOURCE_ID}, except the value is URL encoded.

Security

See CONTRIBUTING for more information.

License

This project is licensed under the Apache-2.0 License.