Formatting help

[mr-entropia]

Hi guys. I've succesfully set up flexi_logger in my project and can write stuff to a log. Great! I'm using the built in with_thread formatter and my log entries look like this:

[2023-06-14 21:46:55.756994 +03:00] T["main"] DEBUG [src\main.rs:73] Uptime: 1188390 ms

I'm happy with the format for now, during development phase. However, when I finish development and build a release binary, I would like to have a formatter that omits the source file and line number. Everything else can stay. How can I write a formatter to accomplish this? I've tried reading the documentation but maybe I'm too stupid to understand it, so a little help is much appreciated.

[emabee]

You can create your own function, anywhere in your codebase, similar to those that are defined in flexi_logger.

Here's a modified copy of with_threads (which is in src/formats.rs).

pub fn with_thread_no_codeline(
    w: &mut dyn std::io::Write,
    now: &mut DeferredNow,
    record: &Record,
) -> Result<(), std::io::Error> {
    write!(
        w,
        "[{}] T[{}] {} {}",
        now.format(TS_DASHES_BLANK_COLONS_DOT_BLANK),
        thread::current().name().unwrap_or("<unnamed>"),
        record.level(),
        &record.args()
    )
}

Use it the same way as the predefined methods, as described in the code example.

[mr-entropia]

Thanks emabee! I will try this out. To be honest, I'm pretty new to Rust and probably would have never figured this out myself... Perhaps a similar example could be added to the documentation?