fix(java): find mvnw in parent dirs and respect --no-pr in tracer path

- Walk up parent directories when looking for mvnw wrapper, fixing
  multi-module projects where mvnw is in the root but optimizer runs
  from a submodule
- Respect user's --no-pr flag in Java tracer path instead of hardcoding
  no_pr=True, allowing PR creation from tracer-based optimizations
- Add --no-pr to e2e tracer test script

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 2 people

codeflash/languages/java/maven_strategy.py

@@ -647,12 +647,16 @@ def get_text(xpath: str, default: str | None = None) -> str | None:
             return None
 
     def find_executable(self, build_root: Path) -> str | None:
-        mvnw_path = build_root / "mvnw"
-        if mvnw_path.exists():
-            return str(mvnw_path)
-        mvnw_cmd_path = build_root / "mvnw.cmd"
-        if mvnw_cmd_path.exists():
-            return str(mvnw_cmd_path)
+        # Walk up parent directories to find mvnw (multi-module projects keep it in the root)
+        search = build_root.resolve()
+        while search != search.parent:
+            mvnw_path = search / "mvnw"
+            if mvnw_path.exists():
+                return str(mvnw_path)
+            mvnw_cmd_path = search / "mvnw.cmd"
+            if mvnw_cmd_path.exists():
+                return str(mvnw_cmd_path)
+            search = search.parent
         if Path("mvnw").exists():
             return "./mvnw"
         if Path("mvnw.cmd").exists():

codeflash/tracer.py

@@ -419,7 +419,7 @@ def _run_java_tracer(existing_args: Namespace | None = None) -> ArgumentParser:
         config.replay_test = replay_test_paths
         config.previous_checkpoint_functions = None
         config.effort = EffortLevel.HIGH.value
-        config.no_pr = True
+        config.no_pr = getattr(config, "no_pr", False)
         config.file = None
         config.function = None
         config.test_project_root = project_root

tests/scripts/end_to_end_test_java_tracer.py

@@ -52,6 +52,7 @@ def run_test(expected_improvement_pct: int) -> bool:
         "codeflash.main",
         "optimize",
         "java",
+        "--no-pr",
         "-cp",
         str(classes_dir),
         "com.example.Workload",