pub fn init_command_logging(level: Option<LogLevel>) -> Result<(), String>Expand description
The --log-level flag and the per-invocation decision it feeds. Re-exported
for main.rs, which is where the subscriber is installed.
Installs the diagnostic subscriber a one-shot admin command asked for.
level is None when a non-empty RUST_LOG is what asked, in which case
it supplies the filter through [build_env_filter]’s second layer — see
plan_logging, which is what decides this function is called at all.