Vendor things

third-party/vendor/env_logger/examples/custom_format.rs

@@ -0,0 +1,54 @@
+/*!
+Changing the default logging format.
+
+Before running this example, try setting the `MY_LOG_LEVEL` environment variable to `info`:
+
+```no_run,shell
+$ export MY_LOG_LEVEL='info'
+```
+
+Also try setting the `MY_LOG_STYLE` environment variable to `never` to disable colors
+or `auto` to enable them:
+
+```no_run,shell
+$ export MY_LOG_STYLE=never
+```
+
+If you want to control the logging output completely, see the `custom_logger` example.
+*/
+
+#[cfg(all(feature = "color", feature = "humantime"))]
+fn main() {
+    use env_logger::{fmt::Color, Builder, Env};
+
+    use std::io::Write;
+
+    fn init_logger() {
+        let env = Env::default()
+            .filter("MY_LOG_LEVEL")
+            .write_style("MY_LOG_STYLE");
+
+        Builder::from_env(env)
+            .format(|buf, record| {
+                let mut style = buf.style();
+                style.set_bg(Color::Yellow).set_bold(true);
+
+                let timestamp = buf.timestamp();
+
+                writeln!(
+                    buf,
+                    "My formatted log ({}): {}",
+                    timestamp,
+                    style.value(record.args())
+                )
+            })
+            .init();
+    }
+
+    init_logger();
+
+    log::info!("a log from `MyLogger`");
+}
+
+#[cfg(not(all(feature = "color", feature = "humantime")))]
+fn main() {}