wasi-nn: only support components #8530
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abrown
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From a technical perspective this all looks fine to me, thanks! For a "is this the time to do this or not" I'd defer to the wasi-nn subgroup, which I know you're intimately tied into as well and likely have a consensus before making this PR |
The wasi-nn specification has moved forward, adopting component model features such as resources. These cannot be specified and implemented using WITX, so the WITX implementation is removed, leaving the WIT implementation intact. In the future, preview1-ABI support could be re-added with a component adapter, as other WASI proposals have done.
With WITX support removed, these files no longer are needed in-tree.
The `build.rs` script was only telling Wiggle where the WITX files
lived. We do need to retain it, though, for `env!("OUT_DIR")` to still
work.
prtest:full
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This PR removes preview1 support for wasi-nn in Wasmtime; let's discuss the ramifications. [#8530]: bytecodealliance/wasmtime#8530
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This PR removes preview1 support for wasi-nn in Wasmtime; let's discuss the ramifications. [#8530]: bytecodealliance/wasmtime#8530
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This is a relatively drastic change to remove all the preview1, WITX-based support from Wasmtime's wasi-nn implementation. This has ramifications:
bench-apilearns how to handle componentswasi-nnbindings crate is no longer usable with Wasmtime (it only understands the preview1 ABI)examplesare left for a later refactor)Why this change, then? The WebAssembly specification has pushed ahead, defining new functionality that depends on component model features (e.g., resources). So far, the
wasmtime-wasi-nnhas had its preview1- and preview2-ABI implementations coexisting side by side,wit.rsandwitx.rs. This was only possible because the WIT and WITX definitions were roughly similar. But I plan to update the Wasmtime implementation to support the new spec changes, which means the older preview1-ABI WITX code would immediately be out of date. And the differences between the updated WIT code and the old WITX code would only grow over time.