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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:03 +0000
commit64d98f8ee037282c35007b64c2649055c56af1db (patch)
tree5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /vendor/env_logger/examples/default.rs
parentAdding debian version 1.67.1+dfsg1-1. (diff)
downloadrustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz
rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/*!
+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
+```
+*/
+
+#[macro_use]
+extern crate log;
+
+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");
+}