vendor/env_logger-0.5.13/examples/direct_logger.rs

   1 /*!
   2 Using `env_logger::Logger` and the `log::Log` trait directly.
   3
   4 This example doesn't rely on environment variables, or having a static logger installed.
   5 */
   6
   7 extern crate log;
   8 extern crate env_logger;
   9
  10 fn record() -> log::Record<'static> {
  11     let error_metadata = log::MetadataBuilder::new()
  12         .target("myApp")
  13         .level(log::Level::Error)
  14         .build();
  15
  16     log::Record::builder()
  17         .metadata(error_metadata)
  18         .args(format_args!("Error!"))
  19         .line(Some(433))
  20         .file(Some("app.rs"))
  21         .module_path(Some("server"))
  22         .build()
  23 }
  24
  25 fn main() {
  26     use log::Log;
  27
  28     let stylish_logger = env_logger::Builder::new()
  29         .filter(None, log::LevelFilter::Error)
  30         .write_style(env_logger::WriteStyle::Always)
  31         .build();
  32
  33     let unstylish_logger = env_logger::Builder::new()
  34         .filter(None, log::LevelFilter::Error)
  35         .write_style(env_logger::WriteStyle::Never)
  36         .build();
  37
  38     stylish_logger.log(&record());
  39     unstylish_logger.log(&record());
  40 }