Tips on incorporating esbuild extensions in the template.yaml file of AWS SAM

Currently, my TypeScript Lambda functions are managed using the AWS Serverless Application Model (SAM), and I rely on esbuild for the build process.

I'm interested in incorporating esbuild plugins into my build process to enable support for TypeScript Project References, allowing me to share code across multiple Lambda functions. However, I'm unsure about how to include these plugins directly in the template.yaml or if it's even feasible. Below is a snippet from my existing template.yaml:

Resources:
  HelloWorldFunction:
    Type: AWS::Serverless::Function
    Metadata: 
      BuildMethod: esbuild
      BuildProperties:
        Minify: true
        Target: es2020
        # ... other properties

Is there a way to define esbuild plugins within the SAM template itself? If direct integration is not supported, what workarounds or best practices do you recommend for seamlessly integrating esbuild plugins with SAM?

typescriptaws-lambdaserverlessaws-samesbuild

Answer №1

As far as I know, it seems that finding information about sharing code among Lambdas can be tricky, but AWS suggests using layers for this purpose. Consider layers as plugins that can be linked to multiple Lambdas, enabling the code to be shared across Lambdas with the layer attached.

https://i.stack.imgur.com/tX6C6.png

To create layers in the YAML file, refer to https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/building-layers.html

For more detailed documentation on layers, visit https://docs.aws.amazon.com/lambda/latest/dg/chapter-layers.html

Answer №2

The esbuild bundler is a great choice for compiling TypeScript code and creating Lambda functions on AWS.

You can easily build and package Node.js AWS Lambda functions using the AWS SAM CLI in conjunction with the esbuild JavaScript bundler. This bundler fully supports Lambda functions written in TypeScript.

BuildProperties provides a variety of options for configuration. For more information, consult the official AWS documentation Building Node.js Lambda functions with esbuild

Make sure to verify EntryPoints and adjust settings such as target and sourcemap based on your requirements

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