Vendor things

third-party/vendor/tracing-attributes/README.md

@@ -0,0 +1,91 @@
+![Tracing — Structured, application-level diagnostics][splash]
+
+[splash]: https://raw.githubusercontent.com/tokio-rs/tracing/master/assets/splash.svg
+
+# tracing-attributes
+
+Macro attributes for application-level tracing.
+
+[![Crates.io][crates-badge]][crates-url]
+[![Documentation][docs-badge]][docs-url]
+[![Documentation (master)][docs-master-badge]][docs-master-url]
+[![MIT licensed][mit-badge]][mit-url]
+[![Build Status][actions-badge]][actions-url]
+[![Discord chat][discord-badge]][discord-url]
+
+[Documentation][docs-url] | [Chat][discord-url]
+
+[crates-badge]: https://img.shields.io/crates/v/tracing-attributes.svg
+[crates-url]: https://crates.io/crates/tracing-attributes
+[docs-badge]: https://docs.rs/tracing-attributes/badge.svg
+[docs-url]: https://docs.rs/tracing-attributes/0.1.26
+[docs-master-badge]: https://img.shields.io/badge/docs-master-blue
+[docs-master-url]: https://tracing-rs.netlify.com/tracing_attributes
+[mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg
+[mit-url]: LICENSE
+[actions-badge]: https://github.com/tokio-rs/tracing/workflows/CI/badge.svg
+[actions-url]:https://github.com/tokio-rs/tracing/actions?query=workflow%3ACI
+[discord-badge]: https://img.shields.io/discord/500028886025895936?logo=discord&label=discord&logoColor=white
+[discord-url]: https://discord.gg/EeF3cQw
+
+## Overview
+
+[`tracing`] is a framework for instrumenting Rust programs to collect
+structured, event-based diagnostic information. This crate provides the
+`#[instrument]` attribute for automatically instrumenting functions using
+`tracing`.
+
+Note that this macro is also re-exported by the main `tracing` crate.
+
+*Compiler support: [requires `rustc` 1.56+][msrv]*
+
+[msrv]: #supported-rust-versions
+
+## Usage
+
+First, add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+tracing-attributes = "0.1.26"
+```
+
+
+This crate provides the `#[instrument]` attribute for instrumenting a function
+with a `tracing` [span]. For example:
+
+```rust
+use tracing_attributes::instrument;
+
+#[instrument]
+pub fn my_function(my_arg: usize) {
+    // ...
+}
+```
+
+[`tracing`]: https://crates.io/crates/tracing
+[span]: https://docs.rs/tracing/latest/tracing/span/index.html
+
+## Supported Rust Versions
+
+Tracing is built against the latest stable release. The minimum supported
+version is 1.56. 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 1.69, the minimum supported version will not be increased
+past 1.66, 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](LICENSE).
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in Tokio by you, shall be licensed as MIT, without any additional
+terms or conditions.