fix: open only the produced output folder, not the whole build/ root

scripts/ubs.py

@@ -1238,19 +1238,26 @@ def pattern_static_prefix(pattern: str) -> Optional[str]:
     return "/".join(segments) if segments else None
 
 
-def preferred_output_roots(project: Project) -> List[Path]:
+def preferred_output_roots(project: Project, artifacts: Sequence[Path]) -> List[Path]:
     """Derive common output roots per project type straight from ARTIFACT_PATTERNS.
 
-    Prefixes sharing the same top-level path segment are collapsed to their
-    common ancestor (e.g. flutter's four patterns all live under "build" and
-    become one root), while prefixes under different top-level segments stay
-    separate (e.g. tauri's "src-tauri/..." and "signing/build").
+    Only prefixes that actually produced an artifact this build are considered,
+    so a single-output build (e.g. just an .aab) opens its own specific folder
+    instead of the noisy shared "build" root. Prefixes sharing the same
+    top-level path segment are collapsed to their common ancestor only when
+    more than one of them has real output (e.g. flutter producing both an
+    .aab and build/web), while prefixes under different top-level segments
+    stay separate (e.g. tauri's "src-tauri/..." and "signing/build").
     """
     groups: Dict[str, List[str]] = {}
     for pattern in ARTIFACT_PATTERNS.get(project.type, []):
         prefix = pattern_static_prefix(pattern)
-        if prefix:
-            groups.setdefault(prefix.split("/", 1)[0], []).append(prefix)
+        if not prefix:
+            continue
+        resolved = (project.path / prefix).resolve()
+        if not any(artifact == resolved or resolved in artifact.parents for artifact in artifacts):
+            continue
+        groups.setdefault(prefix.split("/", 1)[0], []).append(prefix)
     return [project.path / os.path.commonpath(prefixes) for prefixes in groups.values()]
 
 
@@ -1263,7 +1270,7 @@ def artifact_output_directories(project: Project) -> List[Path]:
 
     selected: Set[Path] = set()
     covered: Set[Path] = set()
-    for root in preferred_output_roots(project):
+    for root in preferred_output_roots(project, artifacts):
         resolved_root = root.resolve()
         matches = {
             artifact for artifact in artifacts

scripts/update-manifest.txt

@@ -3,7 +3,7 @@ version 3.7.0
 file 84746b20a3a72f6ff85a629706e50507c1bd200907456b76dd808a2a5ca0efba VERSION
 file 62d7189d00ccadbdeae9647a37b80db6ed9e179bfcf5b2f1d4d1c487dbc815bf build.sh
 file d9672f7bb74551de59fb3d27e1cdf2a5c7c96d41f40135372552c2798a04d7c5 install.sh
-file 76e4cfe7cd7301018a5cae450a6b6dcfbf18bc029759b1bc5da2eea046603b00 scripts/ubs.py
+file 1c4d89ae31cf4ec50c4a908d8ef913525a3410a1017644ff91949d43713e50d7 scripts/ubs.py
 file df0231e3cc0e584be7ae3ade3f1c0a7f92afb2124ec8a15bdb51c76737bbe1e0 scripts/ubs_mcp.py
 file 0a3b9d28fbe62bc55c073f5337954ae92ffca7482fca5d1f681dc99333363416 scripts/bootstrap-update.sh
 file 7b9a21a0854e0ca0476ae6ee38f2b7fc552446c97448ee655995f91e5c6f23d5 scripts/build-rust-helper.sh

tests/test_python_core.py

@@ -46,6 +46,21 @@ def test_flutter_artifacts_open_the_common_build_root(self) -> None:
                 [root / "build"],
             )
 
+    def test_flutter_single_output_opens_its_own_folder_not_whole_build(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary).resolve()
+            output = root / "build/app/outputs/bundle/release"
+            output.mkdir(parents=True)
+            (output / "app-release.aab").write_bytes(b"bundle")
+            # Unrelated plugin build caches that Flutter always leaves under
+            # build/ regardless of which output was actually produced — these
+            # must not cause the whole build/ root to be opened.
+            (root / "build/mobile_scanner").mkdir(parents=True)
+            self.assertEqual(
+                ubs.artifact_output_directories(ubs.Project("flutter", root)),
+                [output],
+            )
+
     def test_output_directories_cover_tauri_gradle_and_xcode(self) -> None:
         with tempfile.TemporaryDirectory() as temporary:
             root = Path(temporary).resolve()