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This creates a concept of "peripheral" for Rust crates housed in Mesa, and "unofficially" uploaded to crates.io by subcommunities of Mesa. This is modeled on LLVM's peripheral versus core support concept: https://llvm.org/docs/SupportPolicy.html This allows use of the mesa3d_util crate without vendoring it. This is a desire of the crosvm maintainers (crrev.com/c/6594760). This also formally defines CODEOWNERS to be the projected uploaders of the mesa3d_util crate. Everyone of course is encouraged to make changes, but that just gives us a heads-up to update the downstream imports of mesa3d_util. The Cargo.toml file is not added here, since Meson is the only officially supported build system of the Mesa3D project. Reviewed-by: Marcin Radomski <dextero@google.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36276>
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57 lines
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ReStructuredText
Rust
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====
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Rust Subproject Names
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---------------------
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All Rust subprojects should follow the convention ``NAME-SEMVER-rs``,
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where ``SEMVER`` is the version up to and including the first nonzero
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component. For example, ``zerocopy-0.8.13`` becomes ``zerocopy-0.8-rs``,
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whereas ``syn-2.0.66`` becomes ``syn-2-rs``.
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Rust Update Policy
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------------------
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Given that for some distributions it's not feasible to keep up with the
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pace of Rust, we promise to only bump the minimum required Rust version
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following those rules:
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- Only up to the Rust requirement of other major Linux desktop
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components, e.g.:
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- `Firefox ESR <https://whattrainisitnow.com/release/?version=esr>`__:
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`Minimum Supported Rust Version:
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<https://firefox-source-docs.mozilla.org/writing-rust-code/update-policy.html#schedule>`__
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- latest `Linux Kernel Rust requirement
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<https://docs.kernel.org/process/changes.html#current-minimal-requirements>`__
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- Only require a newer Rust version than stated by other rules if and only
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if it's required to get around a bug inside rustc.
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As bug fixes might run into rustc compiler bugs, a rust version bump _can_
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happen on a stable branch as well.
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Peripheral Support for crates.io uploads
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----------------------------------------
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Certain Mesa crates are uploaded to crates.io at the discretion of certain
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sub-communities of Mesa. These crates are:
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- https://crates.io/crates/mesa3d_util
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These crates are used as dependencies to other Rust-based projects, such as:
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- https://crates.io/crates/rutabaga_gfx/0.1.61/dependencies
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This is not supported by the "core" Mesa quarterly release cycles, and the
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official Mesa maintainers are not liable for use or mis-use of the crates.
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Please contact the relevant sub-community before using these crates outside
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of Mesa3D.
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Official Mesa distribution of crates will likely have wait until improvements
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are made in the Meson build system:
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- https://github.com/mesonbuild/meson/issues/2173
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The Meson build system is the only build system officially supported by
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Mesa3D.
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