Stream: wit-bindgen

Topic: ✔ Error generating Python bindings

Christoph Brewing (Jun 30 2023 at 13:26):

After having upgraded to wit-bindgen = "0.7.0" for guest generation, the Python bindings are not generated anymore:

$python -m wasmtime.bindgen ./component.wasm --out-dir decoder/

RuntimeError: failed to extract interface information from component

Caused by:
    unknown component version: 0xd (at offset 0x0)

Python uses wasmtime-9.0.0.

The component is working as expected when bound to Rust.

Can anyone confirm that generating Python bindings produces an error? Is there a workaround?

Ramon Klass (Jun 30 2023 at 13:37):

I think the new wit-bindgen expects the wasmtime 10 wit format, wit has changed quite a bit unfortunately, a version of componentize-py that supports wasmtime 10 is next on the list as far as I understand

Ramon Klass (Jun 30 2023 at 13:38):

but in general, that error (unknown component version) means your toolchain has diverged and some expect an older format of components while some expect a newer one

Joel Dice (Jun 30 2023 at 14:02):

Ramon Klass said:

I think the new wit-bindgen expects the wasmtime 10 wit format, wit has changed quite a bit unfortunately, a version of componentize-py that supports wasmtime 10 is next on the list as far as I understand

I think you meant wasmtime-py based on the error Christoph shared. But yeah, componentize-py needs an update, too. The snapshot branch of the componentize-py repo is compatible with the latest component format, but it also relies on toolchain patches to support shared-everything linking, so it's not ready for general use yet.

Ramon Klass (Jun 30 2023 at 14:07):

thank you for elaborating, and yes I need to familiarize myself more with all the parts involved in the wasi toolchain, some are "something something wasmtime" to me still

Ralph (Jun 30 2023 at 14:27):

you aren't the only one! Because there's a lot of movement at the moment prepping for the changes coming a lot of people are "something version 3.1 something version 8.4 something version 23 wasmtime-klsk392" :-) moving targets are hard.....

Christoph Brewing (Jul 07 2023 at 10:11):

(probably last) update: meanwhile wasmtime-py has been updated to match wasmtime 10.0.0 . With this version, the bindings are generated flawlessly.

Notification Bot (Jul 07 2023 at 10:12):

Christoph Brewing has marked this topic as resolved.

Last updated: Nov 22 2024 at 16:03 UTC