Self hosted Turborepo Remote Cache Lambda

Using Turborepo preflight requests combined with Lambda and S3 to generate presigned URLs which allows files larger than 6MB.

Installation:

First create an private S3 Bucket then add some "Lifecycle rules" to delete old files after awhile to save storage.

git clone [email protected]:EloB/turborepo-remote-cache-lambda.git
cd turborepo-remote-cache-lambda/
npm --prefix=function install
sam build
zip -j app.zip .aws-sam/build/TurboRepoRemoteCacheFunction/*

Then create a Lambda function in AWS Console and upload this zip file. Give it permissions to the S3 bucket. Add a function url to it. Add JWT_SECRET and S3_BUCKET as environment variables.

Usage:

Create .turbo/config.json in your monorepo to enable remote caching.

{
  "teamid": "team_yourteamhere",
  "apiurl": "https://YOUR-LAMBDA-URL.lambda-url.eu-central-1.on.aws"
}

Generate a JWT token.

Simpliest way is going to https://jwt.io/ and create one. Enter you JWT_SECRET in the your-256-bit-secret field and set that payload from the image and define a name.

Executing turbo tasks

Don't forget to set the environment TURBO_TOKEN when running a turbo task. Important also that you apply the --preflight to the commands when executing for instance turbo build --preflight else it won't work. There should be an dedicated environment variable for that but hasn't able to work (see TURBO_PREFLIGHT at https://turbo.build/repo/docs/reference/system-variables#system-environment-variables).

Todo

• Simplify the deployment using sam deploy and parameter overrides. Accepting PRs for this!