eng, sync 7745 for JFR profiling (#3152)

* core on latest main

* script and package

* changelog

Author: weidongxu-microsoft

Build-TypeSpec.ps1

@@ -19,8 +19,9 @@ if ($LASTEXITCODE -ne 0) {
 
 Write-Host "Copy JAR and TypeSpec code to './typespec-extension' directory"
 # Copy JAR
-New-Item -ItemType File -Path ./typespec-extension/generator/http-client-generator/target/emitter.jar -Force
+New-Item -ItemType Directory -Path ./typespec-extension/generator/http-client-generator/target/classes -Force
 Copy-Item ./core/packages/http-client-java/generator/http-client-generator/target/emitter.jar ./typespec-extension/generator/http-client-generator/target/emitter.jar -Force
+Copy-Item ./core/packages/http-client-java/generator/http-client-generator/target/classes/PerfAutomation.jfc ./typespec-extension/generator/http-client-generator/target/classes/PerfAutomation.jfc -Force
 # Copy TypeScript code
 Copy-Item -Path ./core/packages/http-client-java/emitter/src -Destination ./typespec-extension/ -Exclude "options.ts" -Recurse -Force
 Copy-Item -Path ./core/packages/http-client-java/emitter/test -Destination ./typespec-extension/ -Recurse -Force

core

@@ -1,9 +1,11 @@
 # Release History
 
-## 0.31.5 (2025-06-25)
+## 0.31.5 (2025-06-26)
 
 Compatible with compiler 1.1.0.
 
+- Supported `dev-options.profile` emitter option, to enable Java Flight Recorder (JFR) profiling.
+
 ## 0.31.4 (2025-06-17)
 
 Compatible with compiler 1.1.0.

typespec-extension/changelog.md

@@ -43,7 +43,8 @@
     "lib/*.tsp",
     "dist/**",
     "!dist/test/**",
-    "generator/http-client-generator/target/emitter.jar"
+    "generator/http-client-generator/target/emitter.jar",
+    "generator/http-client-generator/target/classes/PerfAutomation.jfc"
   ],
   "peerDependencies": {
     "@azure-tools/typespec-autorest": ">=0.57.0 <1.0.0",

typespec-extension/package.json

@@ -180,6 +180,11 @@ export const EmitterOptionsSchema: JSONSchemaType<EmitterOptions> = {
           description: "Temporary working directory for Java code generator.",
           nullable: true,
         },
+        profile: {
+          type: "boolean",
+          description: "Enable performance profiling.",
+          nullable: true,
+        },
       },
       nullable: true,
       additionalProperties: false,

typespec-extension/src/options.ts

@@ -11,3 +11,4 @@ options:
       generate-code-model: true
       loglevel: info
       debug: false
+      profile: false