4e56741c65
# 0.3.0 (Oct 22, 2021) This is a breaking release of `tracing-subscriber`. The primary breaking change in this release is the removal of the dependency on the [`chrono` crate], due to [RUSTSEC-2020-0159]. To replace `chrono`, support is added for formatting timestamps using the [`time` crate] instead. In addition, this release includes a number of other breaking API changes, such as adding (limited) support for `#![no_std]` targets, removing previously deprecated APIs, and more. ### Breaking Changes - Removed APIs deprecated in the v0.2.x release series. - Renamed `Layer::new_span` to `Layer::on_new_span` ([#1674]) - Removed `Layer` impl for `Arc<L: Layer<S>>` and `Arc<dyn Layer<S> + ...>` ([#1649]) - Replaced the [`chrono` crate] with the [`time` crate] for timestamp formatting, to resolve [RUSTSEC-2020-0159] ([#1646]) - Removed `json` and `env-filter` from default features. They must now be enabled explictly ([#1647]) - Changed `FormatEvent::format_event` and `FormatFields::format_fields` trait methods to take a `Writer` type, rather than a `&mut dyn fmt::Write` trait object ([#1661]) - Changed the signature of the `MakeWriter` trait by adding a lifetime parameter ([#781]) ### Changed - **layer**: Renamed `Layer::new_span` to `Layer::on_new_span` ([#1674]) - **fmt**: Changed `FormatEvent::format_event` and `FormatFields::format_fields` trait methods to take a `Writer` type, rather than a `&mut dyn fmt::Write` trait object ([#1661]) - **json**, **env-filter**: `json` and `env-filter` feature flags are no longer enabled by default ([#1647]) ### Removed - Removed deprecated `CurrentSpan` type ([#1320]) - **registry**: Removed deprecated `SpanRef::parents` iterator, replaced by `SpanRef::scope` in [#1431] ([#1648)]) - **layer**: Removed deprecated `Context::scope` iterator, replaced by `Context::span_scope` and `Context::event_scope` in [#1431] and [#1434] ([#1648)]) - **layer**: Removed `Layer` impl for `Arc<L: Layer<S>>` and `Arc<dyn Layer<S> + ...>`. These interfere with per-layer filtering. ([#1649]) - **fmt**: Removed deprecated `LayerBuilder` type ([#1673]) - **fmt**: Removed `fmt::Layer::on_event` (renamed to `fmt::Layer::fmt_event`) ([#1673]) - **fmt**, **chrono**: Removed the `chrono` feature flag and APIs for using the [`chrono` crate] for timestamp formatting ([#1646]) ### Added - **fmt**, **time**: `LocalTime` and `UtcTime` types for formatting timestamps using the [`time` crate] ([#1646]) - **fmt**: Added a lifetime parameter to the `MakeWriter` trait, allowing it to return a borrowed writer. This enables implementations of `MakeWriter` for types such as `Mutex<T: io::Write>` and `std::fs::File`. ([#781]) - **env-filter**: Documentation improvements ([#1637]) - Support for some APIs on `#![no_std]` targets, by disabling the `std` feature flag ([#1660]) Thanks to @Folyd and @nmathewson for contributing to this release! [#1320]: https://github.com/tokio-rs/tracing/pull/1320 [#1673]: https://github.com/tokio-rs/tracing/pull/1673 [#1674]: https://github.com/tokio-rs/tracing/pull/1674 [#1646]: https://github.com/tokio-rs/tracing/pull/1646 [#1647]: https://github.com/tokio-rs/tracing/pull/1647 [#1648]: https://github.com/tokio-rs/tracing/pull/1648 [#1649]: https://github.com/tokio-rs/tracing/pull/1649 [#1660]: https://github.com/tokio-rs/tracing/pull/1660 [#1661]: https://github.com/tokio-rs/tracing/pull/1661 [#1431]: https://github.com/tokio-rs/tracing/pull/1431 [#1434]: https://github.com/tokio-rs/tracing/pull/1434 [#781]: https://github.com/tokio-rs/tracing/pull/781 [`chrono` crate]: https://crates.io/crates/chrono [`time` crate]: https://crates.io/crates/time [RUSTSEC-2020-0159]: https://rustsec.org/advisories/RUSTSEC-2020-0159.html Signed-off-by: Eliza Weisman <eliza@buoyant.io>
2.6 KiB
tracing-subscriber
Utilities for implementing and composing tracing subscribers.
Compiler support: requires rustc 1.42+
Supported Rust Versions
Tracing is built against the latest stable release. The minimum supported version is 1.42. The current Tracing version is not guaranteed to build on Rust versions earlier than the minimum supported version.
Tracing follows the same compiler support policies as the rest of the Tokio project. The current stable Rust compiler and the three most recent minor versions before it will always be supported. For example, if the current stable compiler version is 1.45, the minimum supported version will not be increased past 1.42, three minor versions prior. Increasing the minimum supported compiler version is not considered a semver breaking change as long as doing so complies with this policy.
License
This project is licensed under the MIT license.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Tracing by you, shall be licensed as MIT, without any additional terms or conditions.