bfd6802570
This branch introduces support for `valuable` in `tracing-subscriber`'s
JSON formatter, and in `tracing-serde`, using the `valuable-serde`
bridge.
This allows the `fmt::Json` subscriber to actually record `valuable`
values as structured JSON. Here's an example, where a field is first
recorded using `fmt::Debug`, and then again using `field::valuable`:
```
:; RUSTFLAGS="--cfg tracing_unstable" cargo run --example valuable_json | jq
Finished dev [unoptimized + debuginfo] target(s) in 0.09s
Running `target/debug/examples/valuable_json`
{
"timestamp": "2022-01-25T21:36:30.729658Z",
"level": "INFO",
"fields": {
"valuable": false,
"user": "User { name: \"Arwen Undomiel\", age: 3000, address: Address { country: \"Middle Earth\", city: \"Rivendell\", street: \"leafy lane\" } }"
},
"target": "valuable_json"
}
{
"timestamp": "2022-01-25T21:36:30.729720Z",
"level": "INFO",
"fields": {
"valuable": true,
"user": {
"name": "Arwen Undomiel",
"age": 3000,
"address": {
"country": "Middle Earth",
"city": "Rivendell",
"street": "leafy lane"
}
}
},
"target": "valuable_json"
}
```
As a side note, this branch also nicely validates that recording `Valuable`
values from a subscriber is actually possible, which the previous valuable PR
didn't have an example of.
Signed-off-by: Eliza Weisman <eliza@buoyant.io>
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.