darksingeD
Deno•4mo ago•
6 replies
darksinge

Deno compatibility with local Node/NPM package

Hey everyone, I'm hoping to get some configuration advice for a tricky scenario involving Deno compatibility with a local package that targets the npm ecosystem.

I’m using a framework called SST, which generates a sidecar package inside an .sst/ directory within my project. The .sst/ directory contains SST’s internal tooling, including its own package.json and node_modules.

My Deno code needs to import types from this generated directory. The problem seems rooted in .sst/ targetting the npm ecosystem, but Deno treats .sst/ like any other source code in the project, e.g., expects import foo from 'npm:bar' instead of … from ‘bar’, or import { add } from ‘./calc.ts’ instead of … from ‘./calc’.

How do I make Deno treat the sidecar package generated by SST as an npm module?

Things I’ve tried:
- Configuring the patch field in deno.json . Per the docs, patch is currently limited to JSR packages.
- I got type hints working by adding "unstable": ["sloppy-imports"] to deno.json. But, deno check fails with errors like:
error: Relative import path "@pulumi/pulumi" not prefixed with / or ./ or ../ and not in import map from "file:///path/to/project/.sst/platform/src/components/aws/analog.ts"
  hint: If you want to use a JSR or npm package, try running 'deno add jsr:@pulumi/pulumi' or 'deno add npm:@pulumi/pulumi'

The error message and hint are noted, but as explained above, I don’t believe it’s applicable here because I need Deno to treat .sst/ as an npm module.

Note sure if this is relevant, but SST uses Bun as their runtime — not sure if there's an extra compatibility layer to worry about there or not.

For a minimal repro, you can run these commands:

deno init sst-deno
cd sst-deno
deno add npm:sst
deno sst init --yes
deno check sst.config.ts


Thanks for any help you can provide!
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