@functionless/nodejs-closure-serializer NPM

Closure Serializer

This is a fork of the Pulumi Closure Serializer. @pulumi/pulumi.

Motivation

Functionless allows developers to write cloud applications (using aws-cdk) with pure typescript.

const sfn = new StepFunction(stack, "sfn", () => {
  /* something in the state machine */
  return "result";
});

new Function(stack, "func", async () => {
  return sfn();
});

More on Function in the doc: https://functionless.org/docs/concepts/function

Pulumi's closure serializer helped us bootstrap this experience by doing the heavy lifting of runtime data serialization.

However, Pulumi's serializer had a few short comings:

Coupled to the whole @pulumi/pulumi npm package
Limited extensibility
Makes use of Pulumi resources (Logging and Secrets) in the serializer

Changes from Pulumi

Bug Fix: Symbol Support
Removed: Pulumi Secret support
Removed: Pulumi Logging support
Change: serialize function support replacement of runtime data to be serialized on top of avoiding serialization
Change: Do not serialize functions and constructors that are not invoked
Change: Anonymous functions can be injected at runtime through the serialize callback.
Change: Allow for TypeScript TransformerFactory functions to be applied to serialized closures.
Change: Replace the with syntax with simple let statements.