Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

feat: mark builders as must_use #2239

Merged
merged 2 commits into from Jul 21, 2022

Conversation

DesmondWillowbrook
Copy link
Contributor

Motivation

Builders not marked #[must_use] can not be initialized sometimes, causing silent failures.
Eg.

fn main() {
    tracing_subscriber::fmt();
    tracing::info!("hello");
}

won't print anything.

Solution

Added #[must_use] to builder types in the tracing-subscriber crate.

Copy link
Member

@hawkw hawkw left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

thanks! i'd been meaning to do this myself for a while but hadn't gotten around to it, so thank you for doing it!

as a follow-up, we probably also want to stick #[must_use] attributes on basically any new() or similar constructors, as well...

@hawkw hawkw enabled auto-merge (squash) July 21, 2022 18:12
@hawkw hawkw merged commit c341c7f into tokio-rs:master Jul 21, 2022
hawkw pushed a commit that referenced this pull request Jul 29, 2022
## Motivation

Builders not marked `#[must_use]` can not be initialized sometimes,
causing silent failures.
Eg.
```rust
fn main() {
    tracing_subscriber::fmt();
    tracing::info!("hello");
}
```
won't print anything.

## Solution

Added `#[must_use]` to builder types in the tracing-subscriber crate.
@hawkw hawkw mentioned this pull request Jul 29, 2022
hawkw pushed a commit that referenced this pull request Jul 29, 2022
## Motivation

Builders not marked `#[must_use]` can not be initialized sometimes,
causing silent failures.
Eg.
```rust
fn main() {
    tracing_subscriber::fmt();
    tracing::info!("hello");
}
```
won't print anything.

## Solution

Added `#[must_use]` to builder types in the tracing-subscriber crate.
hawkw pushed a commit that referenced this pull request Aug 10, 2022
## Motivation

Follow up to #2239.

Discovered that

```rust
    tracing_subscriber::fmt().with_ansi(false).finish();
    tracing::info!("hello");
```
doesn't actually do anything, because `finish` returns a `Collector` and
`init` is the thing that actually installs the collector.

## Solution

Added `#[must_use]` which suggests using `try_init` instead.
hawkw added a commit that referenced this pull request Oct 6, 2022
# 0.3.16 (October 6, 2022)

This release of `tracing-subscriber` fixes a regression introduced in
[v0.3.15][subscriber-0.3.15] where `Option::None`'s `Layer`
implementation would set the max level hint to `OFF`. In addition, it
adds several new APIs, including the `Filter::event_enabled` method for
filtering events based on fields values, and the ability to log internal
errors that occur when writing a log line.

This release also replaces the dependency on the unmaintained
[`ansi-term`] crate with the [`nu-ansi-term`] crate, resolving an
*informational* security advisory ([RUSTSEC-2021-0139] for
[`ansi-term`]'s maintainance status. This increases the minimum
supported Rust version (MSRV) to Rust 1.50+, although the crate should
still compile for the previous MSRV of Rust 1.49+ when the `ansi`
feature is not enabled.

### Fixed

- **layer**: `Option::None`'s `Layer` impl always setting the
  `max_level_hint` to `LevelFilter::OFF` (#2321)
- Compilation with `-Z minimal versions` (#2246)
- **env-filter**: Clarify that disabled level warnings are emitted by
  `tracing-subscriber` (#2285)

### Added

- **fmt**: Log internal errors to `stderr` if writing a log line fails
  (#2102)
- **fmt**: `FmtLayer::log_internal_errors` and
  `FmtSubscriber::log_internal_errors` methods for configuring whether
  internal writer errors are printed to `stderr` (#2102)
- **fmt**: `#[must_use]` attributes on builders to warn if a
  `Subscriber` is configured but not set as the default subscriber
  (#2239)
- **filter**: `Filter::event_enabled` method for filtering an event
  based on its fields (#2245, #2251)
- **filter**: `Targets::default_level` accessor (#2242)

### Changed

- **ansi**: Replaced dependency on unmaintained `ansi-term` crate with
  `nu-ansi-term` ((#2287, fixes informational advisory
  [RUSTSEC-2021-0139])
- `tracing-core`: updated to [0.1.30][core-0.1.30]
- Minimum Supported Rust Version (MSRV) increased to Rust 1.50+ (when
  the `ansi`) feature flag is enabled (#2287)

### Documented

- **fmt**: Correct inaccuracies in `fmt::init` documentation (#2224)
- **filter**: Fix incorrect doc link in `filter::Not` combinator
  (#2249)

Thanks to new contributors @cgbur, @DesmondWillowbrook, @RalfJung, and
@poliorcetics, as well as returning contributors @CAD97, @connec,
@jswrenn, @guswynn, and @bryangarza, for contributing to this release!

[nu-ansi-term]: https://github.com/nushell/nu-ansi-term
[ansi_term]: https://github.com/ogham/rust-ansi-term
[RUSTSEC-2021-0139]: https://rustsec.org/advisories/RUSTSEC-2021-0139.html
[core-0.1.30]: https://github.com/tokio-rs/tracing/releases/tag/tracing-core-0.1.30
[subscriber-0.3.15]: https://github.com/tokio-rs/tracing/releases/tag/tracing-subscriber-0.3.15
hawkw added a commit that referenced this pull request Oct 6, 2022
# 0.3.16 (October 6, 2022)

This release of `tracing-subscriber` fixes a regression introduced in
[v0.3.15][subscriber-0.3.15] where `Option::None`'s `Layer`
implementation would set the max level hint to `OFF`. In addition, it
adds several new APIs, including the `Filter::event_enabled` method for
filtering events based on fields values, and the ability to log internal
errors that occur when writing a log line.

This release also replaces the dependency on the unmaintained
[`ansi-term`] crate with the [`nu-ansi-term`] crate, resolving an
*informational* security advisory ([RUSTSEC-2021-0139] for
[`ansi-term`]'s maintainance status. This increases the minimum
supported Rust version (MSRV) to Rust 1.50+, although the crate should
still compile for the previous MSRV of Rust 1.49+ when the `ansi`
feature is not enabled.

### Fixed

- **layer**: `Option::None`'s `Layer` impl always setting the
  `max_level_hint` to `LevelFilter::OFF` (#2321)
- Compilation with `-Z minimal versions` (#2246)
- **env-filter**: Clarify that disabled level warnings are emitted by
  `tracing-subscriber` (#2285)

### Added

- **fmt**: Log internal errors to `stderr` if writing a log line fails
  (#2102)
- **fmt**: `FmtLayer::log_internal_errors` and
  `FmtSubscriber::log_internal_errors` methods for configuring whether
  internal writer errors are printed to `stderr` (#2102)
- **fmt**: `#[must_use]` attributes on builders to warn if a
  `Subscriber` is configured but not set as the default subscriber
  (#2239)
- **filter**: `Filter::event_enabled` method for filtering an event
  based on its fields (#2245, #2251)
- **filter**: `Targets::default_level` accessor (#2242)

### Changed

- **ansi**: Replaced dependency on unmaintained `ansi-term` crate with
  `nu-ansi-term` ((#2287, fixes informational advisory
  [RUSTSEC-2021-0139])
- `tracing-core`: updated to [0.1.30][core-0.1.30]
- Minimum Supported Rust Version (MSRV) increased to Rust 1.50+ (when
  the `ansi`) feature flag is enabled (#2287)

### Documented

- **fmt**: Correct inaccuracies in `fmt::init` documentation (#2224)
- **filter**: Fix incorrect doc link in `filter::Not` combinator
  (#2249)

Thanks to new contributors @cgbur, @DesmondWillowbrook, @RalfJung, and
@poliorcetics, as well as returning contributors @CAD97, @connec,
@jswrenn, @guswynn, and @bryangarza, for contributing to this release!

[nu-ansi-term]: https://github.com/nushell/nu-ansi-term
[ansi_term]: https://github.com/ogham/rust-ansi-term
[RUSTSEC-2021-0139]: https://rustsec.org/advisories/RUSTSEC-2021-0139.html
[core-0.1.30]: https://github.com/tokio-rs/tracing/releases/tag/tracing-core-0.1.30
[subscriber-0.3.15]: https://github.com/tokio-rs/tracing/releases/tag/tracing-subscriber-0.3.15
hawkw added a commit that referenced this pull request Oct 6, 2022
# 0.3.16 (October 6, 2022)

This release of `tracing-subscriber` fixes a regression introduced in
[v0.3.15][subscriber-0.3.15] where `Option::None`'s `Layer`
implementation would set the max level hint to `OFF`. In addition, it
adds several new APIs, including the `Filter::event_enabled` method for
filtering events based on fields values, and the ability to log internal
errors that occur when writing a log line.

This release also replaces the dependency on the unmaintained
[`ansi-term`] crate with the [`nu-ansi-term`] crate, resolving an
*informational* security advisory ([RUSTSEC-2021-0139] for
[`ansi-term`]'s maintainance status. This increases the minimum
supported Rust version (MSRV) to Rust 1.50+, although the crate should
still compile for the previous MSRV of Rust 1.49+ when the `ansi`
feature is not enabled.

### Fixed

- **layer**: `Option::None`'s `Layer` impl always setting the
  `max_level_hint` to `LevelFilter::OFF` (#2321)
- Compilation with `-Z minimal versions` (#2246)
- **env-filter**: Clarify that disabled level warnings are emitted by
  `tracing-subscriber` (#2285)

### Added

- **fmt**: Log internal errors to `stderr` if writing a log line fails
  (#2102)
- **fmt**: `FmtLayer::log_internal_errors` and
  `FmtSubscriber::log_internal_errors` methods for configuring whether
  internal writer errors are printed to `stderr` (#2102)
- **fmt**: `#[must_use]` attributes on builders to warn if a
  `Subscriber` is configured but not set as the default subscriber
  (#2239)
- **filter**: `Filter::event_enabled` method for filtering an event
  based on its fields (#2245, #2251)
- **filter**: `Targets::default_level` accessor (#2242)

### Changed

- **ansi**: Replaced dependency on unmaintained `ansi-term` crate with
  `nu-ansi-term` ((#2287, fixes informational advisory
  [RUSTSEC-2021-0139])
- `tracing-core`: updated to [0.1.30][core-0.1.30]
- Minimum Supported Rust Version (MSRV) increased to Rust 1.50+ (when
  the `ansi`) feature flag is enabled (#2287)

### Documented

- **fmt**: Correct inaccuracies in `fmt::init` documentation (#2224)
- **filter**: Fix incorrect doc link in `filter::Not` combinator
  (#2249)

Thanks to new contributors @cgbur, @DesmondWillowbrook, @RalfJung, and
@poliorcetics, as well as returning contributors @CAD97, @connec,
@jswrenn, @guswynn, and @bryangarza, for contributing to this release!

[nu-ansi-term]: https://github.com/nushell/nu-ansi-term
[ansi_term]: https://github.com/ogham/rust-ansi-term
[RUSTSEC-2021-0139]: https://rustsec.org/advisories/RUSTSEC-2021-0139.html
[core-0.1.30]: https://github.com/tokio-rs/tracing/releases/tag/tracing-core-0.1.30
[subscriber-0.3.15]: https://github.com/tokio-rs/tracing/releases/tag/tracing-subscriber-0.3.15
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

Successfully merging this pull request may close these issues.

None yet

2 participants