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mxxntype/eyre_spantrace_usage.rs

Last active January 25, 2025 18:51
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A snippet of using eyre::Report
Raw
eyre_spantrace_usage.rs
use color_eyre::eyre::Report;
fn main() -> Result<(), Report> {
color_eyre::install()?;
install_tracing()?;
let int = 512;
let string = "sample";
tracing::info!(?int, ?string, "Sample log message");
Ok(())
}
fn install_tracing() -> Result<(), Report> {
use tracing_error::ErrorLayer;
use tracing_subscriber::prelude::*;
use tracing_subscriber::{fmt, EnvFilter};
let filter_layer = EnvFilter::try_from_default_env().or_else(|_| EnvFilter::try_new("info"))?;
let format_layer = fmt::layer()
.with_target(false)
.without_time()
.with_writer(std::io::stderr);
tracing_subscriber::registry()
.with(filter_layer)
.with(format_layer)
.with(ErrorLayer::default())
.try_init()?;
Ok(())
}
@mxxntype
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mxxntype commented Sep 26, 2024

User-facing errors look like this:

2024-09-26T23:01:12.769132Z  INFO read_file: Attempting to read file PATH="/does/not/exist"
Error:
   0: Unable to read config
   1: No such file or directory (os error 2)

Location:
   color-eyre/examples/usage.rs:38

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SPANTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

   0: color_eyre_usage::read_file
      at color-eyre/examples/usage.rs:32

Suggestion: try using a file that exists next time

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.

@mxxntype
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mxxntype commented Sep 26, 2024

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