feat: mark @rspack/tracing as peer dependency

packages/rspack-cli/package.json

@@ -35,7 +35,6 @@
   "dependencies": {
     "@discoveryjs/json-ext": "^0.5.7",
     "@rspack/dev-server": "1.0.10",
-    "@rspack/tracing": "workspace:*",
     "colorette": "2.0.19",
     "exit-hook": "^4.0.0",
     "interpret": "^3.1.1",
@@ -46,6 +45,7 @@
   "devDependencies": {
     "@rslib/core": "0.2.2",
     "@rspack/core": "workspace:*",
+    "@rspack/tracing": "workspace:*",
     "@types/interpret": "^1.1.3",
     "@types/rechoir": "^0.6.1",
     "@types/webpack-bundle-analyzer": "^4.6.0",
@@ -57,7 +57,13 @@
     "typescript": "^5.7.2"
   },
   "peerDependencies": {
-    "@rspack/core": "^1.0.0-alpha || ^1.x"
+    "@rspack/core": "^1.0.0-alpha || ^1.x",
+    "@rspack/tracing": "^1.x"
+  },
+  "peerDependenciesMeta": {
+    "@rspack/tracing": {
+      "optional": true
+    }
   },
   "publishConfig": {
     "access": "public",

packages/rspack-tracing/package.json

@@ -1,7 +1,6 @@
 {
   "name": "@rspack/tracing",
-  "version": "1.0.12",
-  "private": true,
+  "version": "1.2.0-beta.0",
   "type": "module",
   "description": "Internal tracing package for rspack",
   "homepage": "https://rspack.dev",
@@ -11,6 +10,10 @@
     "url": "https://github.com/web-infra-dev/rspack",
     "directory": "packages/rspack-tracing"
   },
+  "publishConfig": {
+    "access": "public",
+    "provenance": true
+  },
   "license": "MIT",
   "main": "./index.js",
   "types": "./index.d.ts",

packages/rspack/package.json

@@ -68,21 +68,25 @@
     "webpack-dev-server": "5.0.4",
     "webpack-sources": "3.2.3",
     "zod": "^3.23.8",
-    "zod-validation-error": "3.4.0"
+    "zod-validation-error": "3.4.0",
+    "@rspack/tracing": "workspace:*"
   },
   "dependencies": {
     "@module-federation/runtime-tools": "0.8.4",
     "@rspack/binding": "workspace:*",
-    "@rspack/tracing": "workspace:*",
     "@rspack/lite-tapable": "1.0.1",
     "caniuse-lite": "^1.0.30001616"
   },
   "peerDependencies": {
-    "@swc/helpers": ">=0.5.1"
+    "@swc/helpers": ">=0.5.1",
+    "@rspack/tracing": "^1.x"
   },
   "peerDependenciesMeta": {
     "@swc/helpers": {
       "optional": true
+    },
+    "@rspack/tracing": {
+      "optional": true
     }
   }
 }

packages/rspack/src/exports.ts

@@ -308,14 +308,25 @@ export const experiments: Experiments = {
 		async register(filter, layer, output) {
 			registerGlobalTrace(filter, layer, output);
 			if (layer === "otel") {
-				const { initOpenTelemetry } = await import("@rspack/tracing");
-				await initOpenTelemetry();
+				try {
+					const { initOpenTelemetry } = await import("@rspack/tracing");
+					await initOpenTelemetry();
+				} catch (error) {
+					console.error(
+						"Failed to import `@rspack/tracing` package. Please install `@rspack/tracing` to enable OpenTelemetry tracing.",
+						error
+					);
+				}
 			}
 		},
 		async cleanup() {
 			cleanupGlobalTrace();
-			const { shutdownOpenTelemetry } = await import("@rspack/tracing");
-			await shutdownOpenTelemetry();
+			try {
+				const { shutdownOpenTelemetry } = await import("@rspack/tracing");
+				await shutdownOpenTelemetry();
+			} catch (error) {
+				// ignore cleanup tracing error
+			}
 		}
 	},
 	RemoveDuplicateModulesPlugin

packages/rspack/src/loader-runner/index.ts

@@ -340,20 +340,29 @@ function getCurrentLoader(
 	return null;
 }
 
+async function tryTrace(context: JsLoaderContext) {
+	try {
+		const {
+			trace,
+			propagation,
+			context: tracingContext
+		} = await import("@rspack/tracing");
+		const tracer = trace.getTracer("rspack-loader-runner");
+		const activeContext = propagation.extract(
+			tracingContext.active(),
+			context.__internal__tracingCarrier
+		);
+		return { tracer, activeContext };
+	} catch (error) {
+		return { tracer: null, activeContext: null };
+	}
+}
+
 export async function runLoaders(
 	compiler: Compiler,
 	context: JsLoaderContext
 ): Promise<JsLoaderContext> {
-	const {
-		trace,
-		propagation,
-		context: tracingContext
-	} = await import("@rspack/tracing");
-	const tracer = trace.getTracer("rspack-loader-runner");
-	const activeContext = propagation.extract(
-		tracingContext.active(),
-		context.__internal__tracingCarrier
-	);
+	const { tracer, activeContext } = await tryTrace(context);
 
 	const loaderState = context.loaderState;
 
@@ -822,7 +831,7 @@ export async function runLoaders(
 					currentLoaderObject.pitchExecuted = true;
 					if (!fn) continue;
 
-					const span = tracer.startSpan(
+					const span = tracer?.startSpan(
 						"LoaderRunner:pitch",
 						{
 							attributes: {
@@ -837,7 +846,7 @@ export async function runLoaders(
 							loaderContext.previousRequest,
 							currentLoaderObject.data
 						])) || [];
-					span.end();
+					span?.end();
 
 					const hasArg = args.some(value => value !== undefined);
 
@@ -874,7 +883,7 @@ export async function runLoaders(
 					const args = [content, sourceMap, additionalData];
 					convertArgs(args, !!currentLoaderObject.raw);
 
-					const span = tracer.startSpan(
+					const span = tracer?.startSpan(
 						"LoaderRunner:normal",
 						{
 							attributes: {
@@ -885,7 +894,7 @@ export async function runLoaders(
 					);
 					[content, sourceMap, additionalData] =
 						(await runSyncOrAsync(fn, loaderContext, args)) || [];
-					span.end();
+					span?.end();
 				}
 
 				context.content = isNil(content) ? null : toBuffer(content);