Vendor things

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

@@ -0,0 +1,37 @@
+/*!
+Using `env_logger`.
+
+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
+```
+*/
+
+use log::{debug, error, info, trace, warn};
+
+use env_logger::Env;
+
+fn main() {
+    // The `Env` lets us tweak what the environment
+    // variables to read are and what the default
+    // value is if they're missing
+    let env = Env::default()
+        .filter_or("MY_LOG_LEVEL", "trace")
+        .write_style_or("MY_LOG_STYLE", "always");
+
+    env_logger::init_from_env(env);
+
+    trace!("some trace log");
+    debug!("some debug log");
+    info!("some information log");
+    warn!("some warning log");
+    error!("some error log");
+}