// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license. use std::io::Write; use super::draw_thread::DrawThread; struct CliLogger(env_logger::Logger); impl CliLogger { pub fn new(logger: env_logger::Logger) -> Self { Self(logger) } pub fn filter(&self) -> log::LevelFilter { self.0.filter() } } impl log::Log for CliLogger { fn enabled(&self, metadata: &log::Metadata) -> bool { self.0.enabled(metadata) } fn log(&self, record: &log::Record) { if self.enabled(record.metadata()) { // it was considered to hold the draw thread's internal lock // across logging, but if outputting to stderr blocks then that // could potentially block other threads that access the draw // thread's state DrawThread::hide(); self.0.log(record); deno_telemetry::handle_log(record); DrawThread::show(); } } fn flush(&self) { self.0.flush(); } } pub fn init(maybe_level: Option<log::Level>) { let log_level = maybe_level.unwrap_or(log::Level::Info); let logger = env_logger::Builder::from_env( env_logger::Env::new() // Use `DENO_LOG` and `DENO_LOG_STYLE` instead of `RUST_` prefix .filter_or("DENO_LOG", log_level.to_level_filter().to_string()) .write_style("DENO_LOG_STYLE"), ) // https://github.com/denoland/deno/issues/6641 .filter_module("rustyline", log::LevelFilter::Off) // wgpu crates (gfx_backend), have a lot of useless INFO and WARN logs .filter_module("wgpu", log::LevelFilter::Error) .filter_module("gfx", log::LevelFilter::Error) .filter_module("globset", log::LevelFilter::Error) // used to make available the lsp_debug which is then filtered out at runtime // in the cli logger .filter_module("deno::lsp::performance", log::LevelFilter::Debug) .filter_module("rustls", log::LevelFilter::Off) // swc_ecma_codegen's `srcmap!` macro emits error-level spans only on debug // build: // https://github.com/swc-project/swc/blob/74d6478be1eb8cdf1df096c360c159db64b64d8a/crates/swc_ecma_codegen/src/macros.rs#L112 // We suppress them here to avoid flooding our CI logs in integration tests. .filter_module("swc_ecma_codegen", log::LevelFilter::Off) .filter_module("swc_ecma_transforms_optimization", log::LevelFilter::Off) .filter_module("swc_ecma_parser", log::LevelFilter::Error) // Suppress span lifecycle logs since they are too verbose .filter_module("tracing::span", log::LevelFilter::Off) // for deno_compile, this is too verbose .filter_module("editpe", log::LevelFilter::Error) .format(|buf, record| { let mut target = record.target().to_string(); if let Some(line_no) = record.line() { target.push(':'); target.push_str(&line_no.to_string()); } if record.level() <= log::Level::Info || (record.target() == "deno::lsp::performance" && record.level() == log::Level::Debug) { // Print ERROR, WARN, INFO and lsp_debug logs as they are writeln!(buf, "{}", record.args()) } else { // Add prefix to DEBUG or TRACE logs writeln!( buf, "{} RS - {} - {}", record.level(), target, record.args() ) } }) .build(); let cli_logger = CliLogger::new(logger); let max_level = cli_logger.filter(); let r = log::set_boxed_logger(Box::new(cli_logger)); if r.is_ok() { log::set_max_level(max_level); } r.expect("Could not install logger."); }