pub fn init()Expand description
Install the process logger, reading log.format (text | json |
compact, default text) and log.level (default info; RUST_LOG env
wins) from the application configuration. -Dkey=value runtime arguments
(the JVM -D analog) are loaded into the override registry first, so
hello_world -- -Dlog.format=json switches format at launch. Idempotent —
a second call is a no-op (the log crate accepts one logger per process).