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new 0.0.3 Oct 31, 2024
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0.0.1 Oct 31, 2024
0.0.0 Oct 31, 2024

#553 in Debugging

Download history 324/week @ 2024-10-28

324 downloads per month

MIT/Apache

9KB
64 lines

tracing-print

Crates.io Version docs.rs CI

A simple println-like format for tracing-subscriber.

Prints the message field of an event and no others. Formats the message according to log level:

  • ERROR: red
  • WARN: yellow
  • INFO: no formatting
  • DEBUG: blue
  • TRACE: dim

Usage

let layer = tracing_subscriber::fmt::layer()
    .event_format(tracing_print::Print::default());

Example

Run this example: cargo run --example simple

tracing::error!("error");
tracing::warn!("warn");
tracing::info!("info");
tracing::debug!("debug");
tracing::trace!("trace");

// Functions as a newline
tracing::info!("");

// Other keys than message won't be displayed
tracing::info!(key = "unseen", "only message will be seen");

// Format macros work like normal
tracing::info!(
    "newlines and formatting work\nsee? display={}, debug={:#?}",
    1337,
    Dummy::default()
);

// Extra ANSI colors can also be applied
tracing::info!(
    "{} {} {}",
    "extra".bold(),
    "ansi".underline(),
    "formatting".italic()
);
tracing::error!("{}", "applies before level".underline())

Looks like this:

error
warn
info
debug
trace

only message will be seen
newlines and formatting work
see? display=1337, debug=Dummy {
    _field: (),
}
extra ansi formatting
applies before level

Dependencies

~1.5MB
~27K SLoC