chore: enable log feature for tracing crate (#25078)

This commit enables the `log` feature for the `tracing` crate.

This allows us to examine additional detailed logs emitted by third party crates
that use `tracing` crate for logging by setting `RUST_LOG` env var or passing
`-L` option in command line.

Closes #25045

Cargo.lock

@@ -1245,6 +1245,7 @@ dependencies = [
  "tokio",
  "tokio-util",
  "tower-lsp",
+ "tracing",
  "twox-hash",
  "typed-arena",
  "uuid",
@@ -7580,6 +7581,7 @@ version = "0.1.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3523ab5a71916ccf420eebdf5521fcef02141234bbc0b8a49f2fdc4544364ef"
 dependencies = [
+ "log",
  "pin-project-lite",
  "tracing-attributes",
  "tracing-core",

cli/Cargo.toml

@@ -156,6 +156,7 @@ thiserror.workspace = true
 tokio.workspace = true
 tokio-util.workspace = true
 tower-lsp.workspace = true
+tracing = { version = "0.1", features = ["log", "default"] }
 twox-hash.workspace = true
 typed-arena = "=2.0.2"
 uuid = { workspace = true, features = ["serde"] }

cli/util/logger.rs

@@ -46,6 +46,15 @@ pub fn init(maybe_level: Option<log::Level>) {
   // 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)
   .format(|buf, record| {
     let mut target = record.target().to_string();
     if let Some(line_no) = record.line() {

tests/specs/npm/npmrc_not_next_to_package_json/main.out

@@ -2,5 +2,8 @@
 [# that serves the same packages. The important bit is the message below.]
 [WILDCARD] No .npmrc file found
 [WILDCARD]
+Download http://localhost:4260/@denotest/esm-basic
+[WILDCARD]
 Download http://localhost:4260/@denotest/esm-basic/1.0.0.tgz
+[WILDCARD]
 Initialize @denotest/esm-basic@1.0.0