Vendor WASI WITs in this repository #722
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I've been trying to dance around doing this and only download WITs at compile time as necessary, but given current integration problems into wasi-sdk I think it's time to just go ahead and vendor the WITs in this repository. The current problem is that the WIT vendoring tool, `wkg`, does not run in the very-old-Linux-container used to build wasi-sdk. The reason WITs are needed are for the `wasm-tools component embed` command to embed type information in startup object files. With this PR the dependency between this embedding and the WIT download process is severed and no longer needed. WITs are vendored much the same way generated bindings are done where the files are present in repo but are checked in CI that they are up-to-date. This means that the files are continuously checked to represent their pristine copies.
pchickey
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Jan 29, 2026
alexcrichton
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Forgotten from WebAssembly#722
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I've been trying to dance around doing this and only download WITs at compile time as necessary, but given current integration problems into wasi-sdk I think it's time to just go ahead and vendor the WITs in this repository. The current problem is that the WIT vendoring tool,
wkg, does not run in the very-old-Linux-container used to build wasi-sdk. The reason WITs are needed are for thewasm-tools component embedcommand to embed type information in startup object files.With this PR the dependency between this embedding and the WIT download process is severed and no longer needed. WITs are vendored much the same way generated bindings are done where the files are present in repo but are checked in CI that they are up-to-date. This means that the files are continuously checked to represent their pristine copies.