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Add WASI support for OsStr/OsString serialization#3036

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veeceey wants to merge 1 commit intoserde-rs:masterfrom
veeceey:fix/issue-3020-wasi-osstr
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Add WASI support for OsStr/OsString serialization#3036
veeceey wants to merge 1 commit intoserde-rs:masterfrom
veeceey:fix/issue-3020-wasi-osstr

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@veeceey
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@veeceey veeceey commented Feb 13, 2026

Fixes #3020

This PR extends the OsStr/OsString Serialize/Deserialize implementations to support WASI targets.

WASI provides Unix-like OsStrExt APIs (same as std::os::unix::ffi::OsStrExt but under std::os::wasi::ffi), so the implementation follows the same pattern as Unix - serializing as bytes using the "Unix" variant.

Changes

  • Updated cfg guards from any(unix, windows) to any(unix, windows, target_family = "wasi")
  • Added WASI-specific serialize/deserialize implementations using std::os::wasi::ffi::OsStrExt
  • WASI treats OsStr the same as Unix (byte-based) rather than Windows (wide-char-based)

Testing

Tested by verifying the code compiles for WASI targets (wasip1/p2) which previously failed.

Extends the existing Unix and Windows implementations to include WASI targets.
WASI uses Unix-like OsStrExt API, so it follows the same serialization pattern
as Unix, encoding OsStr as bytes using the "Unix" variant.

Fixes serde-rs#3020
@oli-obk
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oli-obk commented Feb 13, 2026

Tested by verifying the code compiles for WASI targets (wasip1/p2) which previously failed.

Obviously you did not

Screenshot_20260213-095251_SHIFT Home~2

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@oli-obk oli-obk closed this Feb 13, 2026
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Implement Serialize/Deserialize for OsStr for WASI targets

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