[STAL-1886] JavaScript -> Rust Proof of Concept

[jasonforal]

NOTE: Despite CI failures: this is a fully working proof of concept, but kept as a draft

To run:

1. Create an empty directory to test this repo.
2. In this repo, create a TypeScript file with a variable assignment to the string "hello". For example: echo 'let foo = "hello"\nlet bar = "world"' > index.ts
3. Run the analyzer, pointing it to this directory: cargo run --bin datadog-static-analyzer -- --format sarif --output result.sarif --directory ~/sandbox
4. You'll see the result of the Rust function call printed in stdout:

What problem are you trying to solve?

Demonstrate that we can call into Rust from JavaScript to perform expensive tree-based operations.

What is your solution?

Quick and messy prototype that shows ability to pass tree_sitter::Tree into a Rust function that can be called from from the JavaScript runtime.

This function counts the number of named nodes in the file's tree.

Alternatives considered

What the reviewer should know

• Just a sketch, no consideration given to code organization.
• CI only fails because I circumvented standard operation to make the POC run without config

[datadog-datadog-prod-us1[bot]]

Datadog Software Composition Analysis

No vulnerabilities found.

[jasonforal]

Closing, as ddsa supplants this