feat(log): switch to tracing for logging

[woshilapin]

resolves #161

Description

Only changing env_logger into tracing-subscriber. It should support the same configuration with RUST_LOG (and more, if we convert from log to tracing later).

Motivation and Context

See #161.

How Has This Been Tested?

Logging are usually not tested. If any test would be needed, could you give some pointers?

Changelog Entry

### Changed

- Changes the logger formatter to `tracing-subscriber`

-->

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have formatted the code with rustfmt.
• I checked the lints with clippy.
• I have added tests to cover my changes.
• All new and existing tests passed.

[orhun]

Looks great! We only need one change, see #161 (comment)

[woshilapin]

Looks great! We only need one change, see #161 (comment)

@orhun Sure thing, here it is in a404dfc.

[codecov-commenter]

Codecov Report

Attention: 20 lines in your changes are missing coverage. Please review.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Files	Coverage Δ
src/auth.rs	90.90% <100.00%> (ø)
src/middleware.rs	72.00% <100.00%> (ø)
src/config.rs	82.85% <25.00%> (ø)
src/server.rs	82.87% <66.66%> (ø)
src/main.rs	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

📢 Thoughts on this report? Let us know!.

[orhun]

LGTM, just one thing, can you configure tracing subscriber so that the default log level will be INFO? Because now if you run rustypaste then you get no output. We should somehow use INFO as default to not break CLI backwards compatibility.

[woshilapin]

LGTM, just one thing, can you configure tracing subscriber so that the default log level will be INFO? Because now if you run rustypaste then you get no output. We should somehow use INFO as default to not break CLI backwards compatibility.

@orhun Good point. Done in b18610c thanks to https://docs.rs/tracing-subscriber/latest/tracing_subscriber/filter/struct.EnvFilter.html#method.from_default_env.

[orhun]

Super awesome!