README

A simple command-line program that spells numbers from 0 to 1000.

A simple project meant to play around how modelling with Typescript compares with Haskell.

Build the code

$ yarn
$ cd app
$ yarn build

Run the code locally

Run yarn build from the root of the project. This compiles the typescript files and copies them in the folder with the Dockerfile. Now build the docker image either manually

$ docker build -t <image-tag> docker

or using pulumi (see below). To create a container and send requests simply run

# In one terminal
$ docker run -p 9000:8080 --rm <image>
# In another terminal
$ curl "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{"number": "99"}'

See also: https://hub.docker.com/r/amazon/aws-lambda-nodejs.

Deploy on AWS

• Setup AWS either with AWS CLI or by providing the necessary environment variables by renaming .envrc.template to .envrc and entering your credentials. By leveraging direnv those environment variables will be set up for you when you enter the folder.
• Setup pulumi to work with AWS

# In the root folder of the project
$ yarn build
$ pulumi up
>>> Please choose a stack, or create a new one: signal
>>> Previewing update (signal)
>>>
>>>      Type                       Name                                      Plan       Info
>>>      pulumi:pulumi:Stack        home-task-signal
>>>      ├─ awsx:ecr:Repository     signal-home-task                                     1 warning
>>>  +   ├─ aws:lambda:Function     aws_lambda_function.signal.translate      create
>>>  +   └─ aws:lambda:FunctionUrl  aws_lambda_function_url.signal.translate  create
>>> Outputs:
>>>   + funcArn  : output<string>
>>>   + invokeUrl: output<string>
>>>
>>> Do you want to perform this update?

# Look at the changes and all looks fine, select yes

>>> Outputs:
>>>   + funcArn  : "arn:aws:lambda:eu-west-1:000000000000:function:translate-bde4684"
>>>   + invokeUrl: "https://<some-random-subdomain>.lambda-url.eu-west-1.on.aws/"
>>>
>>> Resources:
>>>     + 9 created

# Test the lambda function
$ curl "https://<some-random-subdomain>.lambda-url.eu-west-1.on.aws" -d '{"number": "99"}'

Request

The API supports numbers

{ "number": 1000 }

or string

{ "number": "1000" }