fix: report ground truth as the site does

scripts/verify.py

@@ -1478,13 +1478,20 @@ def print_platform_result(
         print(f"  No external files: {len(exclusions)} cores (--verbose lists them)")
 
     gt_cov = result.get("ground_truth_coverage")
-    if gt_cov and gt_cov["total"] > 0:
-        pct = gt_cov["with_validation"] * 100 // gt_cov["total"]
+    if gt_cov and not gt_cov.get("applicable", True):
+        # MiSTer declares no core by design: its BiosDB is the answer, and
+        # the site shows "-" for it rather than a 0% gap.
+        print("  Ground truth: not applicable, the platform runs no profiled core")
+    elif gt_cov and gt_cov["total"] > 0:
+        # Rounded, as the site rounds: truncated, RetroArch read 20% here
+        # and 21% there for one measure.
+        pct = round(gt_cov["with_validation"] * 100 / gt_cov["total"])
         print(
             f"  Ground truth: {gt_cov['with_validation']}/{gt_cov['total']} files have emulator validation ({pct}%)"
         )
-        if gt_cov["platform_only"]:
-            print(f"    {gt_cov['platform_only']} platform-only (no emulator profile)")
+        no_profile = gt_cov["total"] - gt_cov.get("with_profile", gt_cov["with_validation"])
+        if no_profile:
+            print(f"    {no_profile} platform-only (no emulator profile)")
 
 
 # Emulator/system mode verification
@@ -2077,7 +2084,7 @@ def print_emulator_result(result: dict, verbose: bool = False) -> None:
     # Ground truth coverage footer
     gt_cov = result.get("ground_truth_coverage")
     if gt_cov and gt_cov["total"] > 0:
-        pct = gt_cov["with_validation"] * 100 // gt_cov["total"]
+        pct = round(gt_cov["with_validation"] * 100 / gt_cov["total"])
         print(
             f"  Ground truth: {gt_cov['with_validation']}/{gt_cov['total']} files have emulator validation ({pct}%)"
         )

tests/test_audit_regressions.py

@@ -5001,5 +5001,40 @@ class AFailedVerificationIsAnError(unittest.TestCase):
         self.assertIn('print(f"ERROR: packs failed verification: {\', \'.join(failing)}", file=sys.stderr)', source)
 
 
+
+class TheGroundTruthFooterSaysWhatItCounts(unittest.TestCase):
+    """"417 platform-only (no emulator profile)" where 369 of 526 files had
+    a profile; 20% here for 21% on the site; and "0/81 (0%)" for MiSTer,
+    which declares no core by design."""
+
+    def _footer(self, coverage):
+        import io as _io
+        from contextlib import redirect_stdout
+
+        from scripts.verify import Severity, print_platform_result
+
+        out = _io.StringIO()
+        counts = {Severity.OK: 1, Severity.INFO: 0, Severity.WARNING: 0, Severity.CRITICAL: 0}
+        result = {"platform": "X", "verification_mode": "existence", "total_files": 1,
+                  "severity_counts": counts, "status_counts": {"ok": 1},
+                  "undeclared_files": [], "exclusion_notes": [], "details": [],
+                  "ground_truth_coverage": coverage}
+        with redirect_stdout(out):
+            print_platform_result(result, ["X"])
+        return out.getvalue()
+
+    def test_counts_and_rounding(self):
+        text = self._footer({"with_validation": 109, "with_profile": 369,
+                             "platform_only": 417, "total": 526, "applicable": True})
+        self.assertIn("(21%)", text)
+        self.assertIn("157 platform-only", text)
+
+    def test_not_applicable(self):
+        text = self._footer({"with_validation": 0, "with_profile": 0,
+                             "platform_only": 81, "total": 81, "applicable": False})
+        self.assertIn("not applicable", text)
+        self.assertNotIn("0/81", text)
+
+
 if __name__ == "__main__":
     unittest.main()