using tui-logger with tracing

[kdheepak]

Thanks for putting together this package.

I'm not able to get this to work with tracing unfortunately. Do you have any idea what might be going on?

I have the following code in the main.rs:

use tracing_subscriber::{
  self, filter::EnvFilter, prelude::__tracing_subscriber_SubscriberExt, util::SubscriberInitExt, Layer,
};

fn main() {
  let directory = ...;
  let log_path = directory.join("debug.log");
  let log_file = std::fs::File::create(&log_path)?;
  let file_subscriber = tracing_subscriber::fmt::layer()
    .with_file(true)
    .with_line_number(true)
    .with_writer(log_file)
    .with_target(false)
    .with_ansi(false)
    .with_filter(EnvFilter::from_default_env());
  tracing_subscriber::registry().with(file_subscriber).with(tui_logger::tracing_subscriber_layer()).init();
  ...
}

And I'm using the following render function:

  fn render(f: &mut super::Frame<'_>, rect: tui::layout::Rect) {
    let state = TuiWidgetState::new().set_default_display_level(LevelFilter::Trace);
    let w = TuiLoggerWidget::default()
      .style_error(Style::default().fg(Color::Red))
      .style_debug(Style::default().fg(Color::Green))
      .style_warn(Style::default().fg(Color::Yellow))
      .style_trace(Style::default().fg(Color::Magenta))
      .style_info(Style::default().fg(Color::Cyan))
      .state(&state);
    f.render_widget(w, rect);
  }

I'm not getting any log output if I do this. If I use the SmartWidget, I get the borders but no logs. I'm getting logs in my file from tracing, just not in the TuiLoggerWidget.

Any idea what might be going on here?

[gin66]

The tracing feature is implemented by #31. If I read the code correctly, then the tracing messages are fed into the log system. So tui_logger needs to be initialized as normal. This means something along the lines of:

    // Set max_log_level to Trace
    tui_logger::init_logger(log::LevelFilter::Trace).unwrap();

    // Set default level for unknown targets to Trace
    tui_logger::set_default_level(log::LevelFilter::Trace);

@ahadnagy Could you please help?

Anyone can provide an example ?

[kdheepak]

Using this in the code throws an exception on unwrap():

    // Set max_log_level to Trace
    tui_logger::init_logger(log::LevelFilter::Trace).unwrap();

Here's the error:

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: SetLoggerError(())', src\logging.rs:31:52        
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

However, if I only add this:

tui_logger::set_default_level(log::LevelFilter::Trace);

it seems to be working! Thanks!