cdk-from-cfn

cdk-from-cfn is a command-line tool that converts AWS CloudFormation templates into AWS CDK code. It supports multiple programming languages including TypeScript, Python, Java, Go, and C#.

Installation

$ cargo install cdk-from-cfn

Usage

$ cdk-from-cfn [INPUT] [OUTPUT] --language <LANGUAGE> --stack-name <STACK_NAME>

• INPUT is the input file path (STDIN by default).
• OUTPUT is the output file path; if not specified, output will be printed on your command line (STDOUT by default).

Node.js Module Usage

cdk-from-cfn leverages WebAssembly (WASM) bindings to provide a cross-platform npm module, which exposes apis to be used in Node.js projects. Simply take a dependency on cdk-from-cfn in your package.json and utilize it as you would a normal module. i.e.

import * as cdk_from_cfn from 'cdk-from-cfn';

// get supported languages
cdk_from_cfn.supported_languages();

// transmute cfn template into cdk app
cdk_from_cfn.transmute(template, language, stackName)

Language and Feature support

Name	Enabled by default	Description
typescript	✔️	Enables support for TypeScript output
golang	✔️	Enables support for Go output
java	✔️	Enables support for Java output
Python	✔️	Enables support for Python output
csharp	✔️	Enables support for C# output

You can enable experimental languages (not enabled by default) by enabling the relevant feature:

$ cargo build --release --features=<feature-name>
Finished release [optimized] target(s) in 0.17s

If you want to disable on-by-default languages, you can pass --no-default-features:

$ cargo build --release --no-default-features --features=golang
Finished release [optimized] target(s) in 0.17s

Implemented

• [x] Fn::FindInMap
• [x] Fn::Join
• [x] Fn::Sub
• [x] Ref
• [x] Fn::And
• [x] Fn::Equals
• [x] Fn::If
• [x] Fn::Not
• [x] Fn::Or
• [x] Fn::GetAtt
• [x] Fn::Base64 support
• [x] Fn::ImportValue support
• [x] Fn::Select support
• [x] Resource ordering based on dependencies
• [x] Conditions are emitted in ts but not attached to resource conditions
• [x] Metadata emission for updates to asgs / lambda functions.
• [x] Emission of outputs / exports
• [x] Fn::GetAZs support
• [x] Adding depends-on, and ordering based on it too.
• [x] Deletion policy
• [x] Fn::Cidr support

Remaining

There are known unsupported features. Working on them in priority order:

• [ ] Create policy
• [ ] ssm metadata references
• [ ] secretsmanager references