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Deno's module hooks report no `format` for an ES module, so the orchestrion transform treated it as CommonJS and injected a `require()` that throws when the module loads. This broke `@sentry/node` on Deno for the ESM builds of libraries it instruments, such as the AI SDKs and `postgres`. The Deno load hook now restores the format of `.mjs` files and of `.js` files in a `"type": "module"` package, the same way it already did for JSON. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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This is straightforwardly correct. Closes the loop that we started with the JSON fix. TBH, I'm not sure why we didn't do that then. Oh well, probably thought we could get away without the added overhead.
Definitely add a comment to remove it in v12 (or 13 or whenever Deno ages out of needing it).
| * `'json'` or `'module'`. Without the format, Deno's CJS loader compiles JSON as JavaScript | ||
| * (`SyntaxError: Unexpected token ':'`), and the transform treats an ES module as CommonJS and | ||
| * injects a `require()` into it (`ReferenceError: require is not defined`). The format is restored | ||
| * on the `nextLoad` result, so the transform sees it too. Only Deno needs this. |
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Worth adding a comment here and in the PR description as well, that it's only needed as long as we support Deno versions that do not have the fix in denoland/deno#36849.
We're already gating on the presence/lack of a format, so we don't need any version sniffing, I don't think. But it'd be nice to know when we can cut the fix out entirely, certainly not before v12.
Actually, come to think of it, could also add a // todo(v12): evaluate if this is still needed for supported Deno versions so we know to circle back.
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With
deno run --preload=npm:@sentry/deno/import, an instrumented library that ships an ES module build crashed on import withReferenceError: require is not defined. Deno's module hooks report noformatfor an ES module, so the orchestrion transform treated it as CommonJS and injected arequire()into it. This hit the ESM builds of the AI SDKs andpostgres, among others.The Deno load hook now restores the format of
.mjsfiles and of.jsfiles in a"type": "module"package, the same way it already did for JSON (#24412). It restores it on thenextLoadresult, because the transform reads the format there.Running the shared Node integration suites on Deno found this. The next PR in the stack runs them in CI; the Deno-only orchestrion suites did not catch it because they publish fake channel messages instead of loading the real libraries.
Part of #24052 and #23897.
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