74 lines
2.2 KiB
Rust
74 lines
2.2 KiB
Rust
//! The `logger` module configures `env_logger`
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use {
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lazy_static::lazy_static,
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std::sync::{Arc, RwLock},
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};
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lazy_static! {
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static ref LOGGER: Arc<RwLock<env_logger::Logger>> =
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Arc::new(RwLock::new(env_logger::Logger::from_default_env()));
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}
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struct LoggerShim {}
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impl log::Log for LoggerShim {
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fn enabled(&self, metadata: &log::Metadata) -> bool {
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LOGGER.read().unwrap().enabled(metadata)
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}
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fn log(&self, record: &log::Record) {
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LOGGER.read().unwrap().log(record);
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}
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fn flush(&self) {}
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}
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fn replace_logger(logger: env_logger::Logger) {
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log::set_max_level(logger.filter());
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*LOGGER.write().unwrap() = logger;
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let _ = log::set_boxed_logger(Box::new(LoggerShim {}));
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}
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// Configures logging with a specific filter overriding RUST_LOG. _RUST_LOG is used instead
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// so if set it takes precedence.
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// May be called at any time to re-configure the log filter
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pub fn setup_with(filter: &str) {
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let logger =
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env_logger::Builder::from_env(env_logger::Env::new().filter_or("_RUST_LOG", filter))
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.format_timestamp_nanos()
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.build();
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replace_logger(logger);
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}
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// Configures logging with a default filter if RUST_LOG is not set
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pub fn setup_with_default(filter: &str) {
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let logger = env_logger::Builder::from_env(env_logger::Env::new().default_filter_or(filter))
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.format_timestamp_nanos()
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.build();
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replace_logger(logger);
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}
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// Configures logging with the default filter "error" if RUST_LOG is not set
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pub fn setup() {
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setup_with_default("error");
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}
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// Configures file logging with a default filter if RUST_LOG is not set
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//
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// NOTE: This does not work at the moment, pending the resolution of https://github.com/env-logger-rs/env_logger/issues/208
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pub fn setup_file_with_default(logfile: &str, filter: &str) {
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use std::fs::OpenOptions;
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let file = OpenOptions::new()
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.write(true)
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.create(true)
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.append(true)
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.open(logfile)
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.unwrap();
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let logger = env_logger::Builder::from_env(env_logger::Env::new().default_filter_or(filter))
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.format_timestamp_nanos()
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.target(env_logger::Target::Pipe(Box::new(file)))
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.build();
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replace_logger(logger);
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}
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