feat: OpenTelemetry Tracing API and Exporting (#26710)

Initial import of OTEL code supporting tracing. Metrics soon to come.
Implements APIs for https://jsr.io/@deno/otel so that code using
OpenTelemetry.js just works tm.

There is still a lot of work to do with configuration and adding
built-in tracing to core APIs, which will come in followup PRs.

---------

Co-authored-by: Luca Casonato <hello@lcas.dev>

1 files changed, 18 insertions, 0 deletions

diff --git a/cli/args/mod.rs b/cli/args/mod.rs
index e19025f8b..3aaf2bd43 100644
--- a/cli/args/mod.rs
+++ b/cli/args/mod.rs
@@ -27,6 +27,7 @@ use deno_npm::npm_rc::ResolvedNpmRc;
 use deno_npm::resolution::ValidSerializedNpmResolutionSnapshot;
 use deno_npm::NpmSystemInfo;
 use deno_path_util::normalize_path;
+use deno_runtime::ops::otel::OtelConfig;
 use deno_semver::npm::NpmPackageReqReference;
 use import_map::resolve_import_map_value_from_specifier;
 
@@ -1129,6 +1130,23 @@ impl CliOptions {
     }
   }
 
+  pub fn otel_config(&self) -> Option<OtelConfig> {
+    if self
+      .flags
+      .unstable_config
+      .features
+      .contains(&String::from("otel"))
+    {
+      Some(OtelConfig {
+        runtime_name: Cow::Borrowed("deno"),
+        runtime_version: Cow::Borrowed(crate::version::DENO_VERSION_INFO.deno),
+        ..Default::default()
+      })
+    } else {
+      None
+    }
+  }
+
   pub fn env_file_name(&self) -> Option<&String> {
     self.flags.env_file.as_ref()
   }