Package Layered Lambdas 
Packages lambdas with intra-project dependencies using Webpack and a base layer
with the dependencies defined in package.json.
Checksums are created for dependencies per lambda so that rebuild only happens when files are changed.
Packaged lambdas are published to S3 so they can be picked up from CloudFormation and shared also cached for other developers.
Installation
npm i --save-dev --save-exact @nordicsemiconductor/package-layered-lambdas
Usage
More background information on this project and usage instructions can be found in this blog post.
Also, have a look at the test stack, which uses this
library to publish a lambda and especially the
cdk/prepareResources.ts which shows how to
package a lambda and a layer.
Use with Yarn
The lockfile name and the command used to install the dependencies of
packBaseLayer are configureable. For use with Yarn use these settings:
packBaseLayer({
lockFileName: "yarn.lock",
installCommand: [
"yarn",
"install",
"--frozen-lockfile",
"--ignore-scripts",
"--production",
],
});