feat: Download WASI-SDK during build#188
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dicej merged 1 commit intobytecodealliance:mainfrom Jan 2, 2026
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Thanks for doing this, @WhiteAbeLincoln! LGTM; just one suggestion inline below.
build.rs
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| // how it's given in the github release build pipeline | ||
| let version = match env::var("WASI_SDK_VERSION").ok() { | ||
| Some(v) => v, | ||
| None => bail!("wasi-sdk not found and WASI_SDK_VERSION not set, cannot download"), |
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Currently, WASI-SDK 27 is the only version known to work with componentize-py, so we should probably default to that if WASI_SDK_VERSION is not set. I'm hoping we can support newer versions in the future, but even then we'll be able to pick a reasonable default.
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Sounds good, I've defaulted to 27 if the var isn't set. Sorry for the slow response, holidays have been busy 😅
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Similar to the
build_zlibstep, it downloads the wasi-sdk to the out directory. This download is performed if the path given by $WASI_SDK_PATH or/opt/wasi-sdkdoes not exist.If $NO_DOWNLOAD_WASI_SDK is set, then we skip the automatic download even if the above path didn't exist when checked.
The download can be controlled using $WASI_SDK_URL to give the full download url, or $WASI_SDK_SOURCE (the github organization) and $WASI_SDK_VERSION (the major version number). $WASI_SDK_VERSION must be provided.
fixes #180