Deno Lambda Adapter

A thin shim for the AWS Lambda layer awslabs/aws-lambda-adapter in Deno, re-wrapping events and context from into a Node.js compatible version.

You may read more about the story at #354.

Usage

1. Take a brief look at Deno's official guide for AWS Lambda.
2. Create a Dockerfile for your Lambda function, you may use our example below.
3. Create an entry point handler.ts using registerHandler from this package.
4. Build and push your Docker image to ECR.
5. Create a Lambda function using the image.

Dockerfile

# This Dockerfile is a modified version from the example provided at
# https://docs.deno.com/runtime/tutorials/aws_lambda/
#
# Modifications:
# 1. debian -> alpine
# 2. `timeout 10s deno run` -> `deno cache`

# Set up base images
FROM public.ecr.aws/awsguru/aws-lambda-adapter:0.8.4 AS aws-lambda-adapter
FROM alpine AS runtime

COPY --from=aws-lambda-adapter /lambda-adapter /opt/extensions/lambda-adapter

ENV PORT=8000
EXPOSE 8000

RUN mkdir /var/deno/
ENV DENO_DIR=/var/deno/

# Copy the function code
WORKDIR "/var/task"
COPY . /var/task

# Install deno
RUN apk add --no-cache deno

# Warmup caches
RUN deno cache handler.ts

CMD ["deno", "run", "-A", "handler.ts"]

handler.ts

import { registerHandler } from "jsr:@vicary/lambda-adapter";

registerHandler(async (event, context) => {
  return "Hello World!";
});