target-spec

Added

• Support for parsing rustc --print=cfg output, under a new custom-cfg feature. (The existing custom feature now implicitly includes custom-cfg.)

Changed

• CustomTripleCreateError::Unavailable is now deprecated, and replaced with CustomJsonUnavailable/CustomCfgUnavailable.

Other improvements

• The crates.io config for target-spec now enforces GitHub Trusted Publishing.

Added

• Support for parsing rustc --print=cfg output, under a new custom-cfg feature. (The existing custom feature now implicitly includes custom-cfg.)

Changed

• CustomTripleCreateError::Unavailable is now deprecated, and replaced with CustomJsonUnavailable/CustomCfgUnavailable.

Other improvements

• The crates.io config for target-spec now enforces GitHub Trusted Publishing.

Changed

• Updated cfg-expr to version 0.20.6, updating builtin targets to Rust 1.93.

Changed

• Updated cfg-expr to version 0.20.6, updating builtin targets to Rust 1.93.

Fixed

• In custom targets, support arbitrary strings such as "immediate-abort" for panic-strategy.

Fixed

• In custom targets, support arbitrary strings such as "immediate-abort" for panic-strategy.

Changed

• Updated cfg-expr to version 0.20.5, updating builtin targets to Rust 1.92.

Changed

• Updated cfg-expr to version 0.20.5, updating builtin targets to Rust 1.92.

Fixed

• For custom targets, updated the deserializer to handle target-pointer-width becoming an integer in the newest Rust nightlies.

Changed

• Updated cfg-expr to version 0.20.3, updating builtin targets to Rust 1.90.

Fixed

Replaced obsolete doc_auto_cfg with doc_cfg, to fix Rust nightly builds with the doc_cfg flag enabled.

Changed

• Updated cfg-expr to version 0.20.2, updating builtin targets to Rust 1.89.

Changed

• Internal dependency cfg-expr updated to 0.20.2, updating builtin targets to Rust 1.88.
• MSRV updated to Rust 1.86, as required by dependencies. (Apologies for not fulfilling the 6 month support promise for this version series.)

Changed

Internal dependency cfg-expr updated to 0.18.0, updating builtin targets to Rust 1.85.

Fixed

• Removed unused direct dependency on unicode-ident. Thanks hanna-kruppe for your contribution!

Added

• Added Triple::from_rustc_version_verbose and Platform::from_rustc_version_verbose to parse rustc -vV output and obtain a triple.

Changed

• Renamed Platform::current to Platform::build_target to indicate that it is determined at build time, not at runtime. The old method is still available but has been marked deprecated.

Changed

• Improved error message for CustomTripleCreateError::Unavailable.

Added

• CustomTripleCreateError now has input, input_string, line_and_column, and label methods. These methods aid in implementing target-spec-miette, and also allow dependencies to be oblivious to whether the custom feature is enabled.

Fixed

• Custom platforms now deserialize the target-family and target-endian fields correctly. Previously, these fields were ignored and always treated as empty.

Deprecated

• Error::CustomTripleCreate is now deprecated. This error was never actually created, and will be removed in the future.
• CustomTripleCreateError::Deserialize is now deprecated. target-spec now creates a different DeserializeJson variant when deserialization fails. This variant also contains the original input being deserialized.

Changed

• MSRV updated to Rust 1.82.
• Internal dependency cfg-expr updated to 0.17.2, updating builtin targets to Rust 1.83.

Changed

• Internal dependency cfg-expr updated to 0.17.0, updating builtin targets to Rust 1.81.

Fixed

• Update minimum version of target-lexicon dependency to 0.12.16, to ensure that minimal-version builds work.

Changed

• MSRV updated to Rust 1.75.
• Internal dependency cfg-expr updated to 0.16.0, updating builtin targets to Rust 1.80.

Changed

• MSRV updated to Rust 1.73.
• Internal dependency cfg-expr updated to 0.15.6, updating builtin targets to Rust 1.75.

Changed

• Internal dependency cfg-expr updated to 0.15.4, updating builtin targets to Rust 1.71.

Changed

• TargetSpec now stores plain strings rather than parsed triples. This matches what Cargo does.
• TargetExpression has been renamed renamed to TargetSpecExpression.
• Error::UnknownTargetTriple has been renamed to Error::InvalidTargetSpecString, and returns a new PlainStringParseError type.

Added

• TargetSpec, TargetSpecExpression and TargetSpecPlainString now implement std::fmt::Display.

Fixed

• Triple's Eq, PartialEq, Ord, PartialOrd and Hash now take into account custom platforms.

Added

Custom platforms

Added support for custom triples and platforms via JSON specifications:

• Added support for custom triples and platforms, under the optional custom feature.
• New methods on Platform and Triple:
  • is_standard: returns true if this is a standard platform (builtin or heuristic).
  • is_custom: returns true if this is a custom platform.
  • is_builtin: returns true if this is a builtin platform.
  • is_heuristic: returns true if this platform was determined heuristically.

Other additions

• Added new_strict methods to Platform and Triple, to disable heuristic target parsing.

Fixed

• target_os = "none" is now correctly handled.

Changed

• Internal dependency cfg-expr updated to 0.15.3, updating builtin targets to Rust 1.70.
• PlatformSummary is now non-exhaustive.
• PlatformSummary::new now creates a new PlatformSummary from a triple string. (The old PlatformSummary::new has been renamed to PlatformSummary::from_platform).

Removed

• Removed deprecated Error::UnknownPredicate variant.
• Error no longer implements Eq or PartialEq due to one of its variants now containing serde_json::Error.

Changed

• Internal dependency cfg-expr updated to 0.15.0, updating builtin targets to Rust 1.68.
• MSRV updated to Rust 1.66.

Added

Added note to readme about MSRV for target-spec 1.3.x.

Changed

• Internal dependency cfg-expr updated to 0.13.0, updating builtin targets to Rust 1.66.
• MSRV updated to Rust 1.62.

Updated

Internal dependency cfg-expr updated to 0.12.0, enabling parsing of target_abi.

Added

• ExpressionParseError now carries information about the reason a target expression couldn't be parsed. This has been done to support pretty-printing via the new target-spec-miette crate.

Changed

• Repository location update.
• Internal dependency updates.
• MSRV updated to Rust 1.58.

Thanks to Carol Nichols for her contributions to this release!

Fixed

• Unknown predicates now evaluate to false, matching Cargo's behavior.
  • As a result, Error::UnknownPredicate is no longer in use and has been deprecated.

Changed

• Internal dependency updates.
• MSRV updated to Rust 1.56.

Added

• Update badges in README.
• Add doc_cfg to the docs.rs build.

No breaking changes in this release compared to version 0.9.

Changed

• Internal dependency version bump: cfg-expr updated to 0.10.0.

[0.9.0] - 2021-10-01

Added

• Triple represents a target triple, uniquely identified by a triple string.
• TargetExpression represents a target expression beginning with cfg(.

Changed

• target-spec now uses target-lexicon to parse triples, while continuing to use cfg-expr for expressions and evaluation.
  • Updated supported builtin targets to Rust 1.55.
  • target-spec is now more forward compatible, since new targets in future versions of Rust can be supported with non-breaking updates to target-lexicon.
• TargetSpec is now an enum with Triple and TargetExpression variants.
• Platform no longer has a lifetime parameter.
• Updated supported builtin targets to Rust 1.55.
• cfg-expr is now a private dependency again (target-lexicon is also a private dependency).
• MSRV updated to Rust 1.51.

Changed

• Public dependency version bumps:
  • cfg-expr updated to 0.7.1.
  • proptest updated to version 1 and the corresponding feature renamed to proptest1.

Changed

• cfg-expr version requirement relaxed: 0.6 through 0.7 are now supported. There are no API changes between the two versions.

Added

• Platform now implements Hash + Eq + Ord.

Changed

• TargetFeatures and Platform::add_flags now accept Cow<'static, str>, simplifying lifetime management in many cases.
• cfg-expr updated to 0.6.0.

Changed

• Updated cfg-expr dependency to 0.5.0.

Fixed

• Fixed compilation on platforms without target features (#175).

Added

• New, optional feature summaries to provide serialization and deserialization for Platform and TargetFeatures.
• Platform::is_custom returns true if the platform was created with the custom constructor.

Changed

• The error types have been unified into a single Error type.
• Platform::new and Platform::current now return errors instead of None.

Added

• Platform::custom creates platforms that are unknown to rustc.
  • This is supported through cfg-expr, which is now a public dependency.
  • Custom platforms are often found in embedded Rust.

Changed

• In order to support custom platforms, Platform::triple now returns a &'a str instead of a &'static str.

Added

• New feature proptest010 to generate random platforms for property testing.

Fixed

• Better handling of unknown flags.
  • Unknown flags now evaluate to false instead of erroring out.
  • Added Platform::add_flags to allow setting flags that evaluate to true.

These changes were prompted by how cargo-web sets the cargo_web flag to true for cargo web build.

This was mistakenly published and was yanked.

Changed

• Updated repository links.

Added

• Added support for parsing specs and platforms separately from evaluating them, making error-less evaluation possible.
• Added support for target features, including situations when target features are unknown.

Changed

• Switched to cfg-expr as the backend for cfg() expressions.

• Initial release.

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