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Add support for wasm32-wasip1 and wasm32-wasip2, remove support for wasm32-wasi #499

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The wasm32-wasi target will be removed in Rust 1.84 and existing users are encouraged to migrate to either wasm32-wasip1, or wasm32-wasip2.

Strictly speaking, this is a breaking change despite affecting only deprecated target, so it's probably better to release it in getrandom v0.3.

Closes #492

@newpavlov newpavlov added this to the Next Release milestone Sep 5, 2024
let mut chunks = dest.chunks_exact_mut(size_of::<u64>());
for chunk in &mut chunks {
let dst: *mut u64 = chunk.as_mut_ptr().cast();
let val = get_random_u64();
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get_random_u64 is used instead of get_random_bytes because the latter uses an allocation due to the Wit IDL restrictions. This should be fine since the main use case of getrandom is seed generation.

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Hi there; WASI contributor here. I reviewed this and left some minor remarks about terminology - but overall this looks really good, and I'm excited for this to land!

src/lib.rs Outdated Show resolved Hide resolved
runs-on: ubuntu-22.04
steps:
- uses: actions/checkout@v4
- uses: dtolnay/rust-toolchain@nightly

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The WASI 0.2 target should already be available on the beta channel, and will be available on stable come Rust 1.82.

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Consider updating to wasi v0.13.1+wasi-0.2.0
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