env_logger 0.11.3

A logging implementation for `log` which is configured via an environment variable.
Documentation 
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/*!
Using `env_logger::Logger` and the `log::Log` trait directly.

This example doesn't rely on environment variables, or having a static logger installed.
*/

use env_logger::{Builder, WriteStyle};

use log::{Level, LevelFilter, Log, MetadataBuilder, Record};

#[cfg(feature = "unstable-kv")]
static KVS: (&str, &str) = ("test", "something");

fn record() -> Record<'static> {
    let error_metadata = MetadataBuilder::new()
        .target("myApp")
        .level(Level::Error)
        .build();

    let mut builder = Record::builder();
    builder
        .metadata(error_metadata)
        .args(format_args!("Error!"))
        .line(Some(433))
        .file(Some("app.rs"))
        .module_path(Some("server"));
    #[cfg(feature = "unstable-kv")]
    {
        builder.key_values(&KVS);
    }
    builder.build()
}

fn main() {
    let stylish_logger = Builder::new()
        .filter(None, LevelFilter::Error)
        .write_style(WriteStyle::Always)
        .build();

    let unstylish_logger = Builder::new()
        .filter(None, LevelFilter::Error)
        .write_style(WriteStyle::Never)
        .build();

    stylish_logger.log(&record());
    unstylish_logger.log(&record());
}