fix: count core data trees apart from baseline

scripts/generate_pack.py

@@ -608,6 +608,7 @@ def _report_pack_counts(
     core_count: int,
     source: str,
     verification_mode: str,
+    tree_count: int = 0,
 ) -> None:
     """Print the line the pipeline's consistency check reads.
 
@@ -639,10 +640,11 @@ def _report_pack_counts(
             f"{core_count} from emulator profiles [{verification_mode}]"
         )
     else:
-        baseline = total_files - core_count
+        baseline = total_files - core_count - tree_count
+        trees = f"{tree_count} in core data trees + " if tree_count else ""
         print(
             f"  {zip_path}: {total_files} files packed ({baseline} baseline + "
-            f"{core_count} from cores), {', '.join(parts)} [{verification_mode}]"
+            f"{trees}{core_count} from cores), {', '.join(parts)} [{verification_mode}]"
         )
 
 def _select_variants(
@@ -1314,11 +1316,19 @@ def generate_pack(
           core_trees = [t for t in core_trees if not _extras_for_systems([t], owned)]
       elif system_filter:
           core_trees = _extras_for_systems(core_trees, system_filter)
+      # Counted apart: the trees a core reads are not on the platform's
+      # list. MyMinUI declares nothing and its line read "6944 baseline".
       total_files += _pack_data_directories(
           zf, pack_systems, data_registry, platform_name, base_dest,
           flatten, case_insensitive, seen_destinations, seen_lower,
+          seen_parents, required_only=required_only,
+      )
+      tree_count = _pack_data_directories(
+          zf, {}, data_registry, platform_name, base_dest,
+          flatten, case_insensitive, seen_destinations, seen_lower,
           seen_parents, required_only=required_only, core_trees=core_trees,
       )
+      total_files += tree_count
 
       # README.txt for users: personalized step-by-step per platform
       num_systems = len(pack_systems)
@@ -1357,7 +1367,7 @@ def generate_pack(
 
     _report_pack_counts(
         zip_path, file_status, total_files, core_count, source,
-        verification_mode,
+        verification_mode, tree_count=tree_count,
     )
     if cut is not None:
         _report_left_out(

tests/test_core_data_trees.py

@@ -165,5 +165,30 @@ class AmberelecCarriesTheMachines(unittest.TestCase):
         )
 
 
+class TheCountLineKeepsTreesOutOfTheBaseline(unittest.TestCase):
+    """MyMinUI declares no file, and its pack line read "6944 baseline": the
+    fbneo trees its cores read were counted as the platform's list."""
+
+    def test_a_platform_declaring_nothing_has_no_baseline(self) -> None:
+        import contextlib
+        import io
+
+        previous = os.getcwd()
+        os.chdir(REPO_ROOT)
+        self.addCleanup(os.chdir, previous)
+        db = common.load_database("database.json")
+        record = builder.PackRecord()
+        out = io.StringIO()
+        with contextlib.redirect_stdout(out):
+            builder.generate_pack(
+                "myminui", "platforms", db, "bios", "tmp", offline=True, record=record,
+                data_registry=common.load_data_dir_registry("platforms"),
+            )
+        line = next(l for l in out.getvalue().splitlines() if "files packed" in l)
+        self.assertIn("(0 baseline + ", line)
+        if record.trees:
+            self.assertIn(f"+ {len(record.trees)} in core data trees + ", line)
+
+
 if __name__ == "__main__":
     unittest.main()