[FIX] Uge session of debugging and code coverage.

api/coverage-report.php

@@ -0,0 +1,64 @@
+<?php
+// Dev-only: merges the Xdebug dumps produced by coverage-prepend.php and
+// prints per-file line coverage. Usage (from the repo root):
+//
+//   SHOW_MISSING=1 php api/coverage-report.php \
+//       api/index.php api/router.php api/lib/Auth.php api/lib/ScoreScanner.php
+
+$dir = sys_get_temp_dir() . '/ohmj_cov';
+$files = glob($dir . '/cov_*.ser') ?: [];
+$merged = [];
+
+foreach ($files as $f) {
+    $data = @unserialize(file_get_contents($f));
+    if (!is_array($data)) {
+        continue;
+    }
+    foreach ($data as $file => $lines) {
+        foreach ($lines as $line => $status) {
+            if (!isset($merged[$file][$line]) || $status === 1) {
+                $merged[$file][$line] = ($status === 1 || ($merged[$file][$line] ?? -1) === 1) ? 1 : $status;
+            }
+        }
+    }
+}
+
+$targets = array_slice($argv, 1);
+if (!$targets) {
+    $targets = array_keys($merged);
+}
+
+$grandTotal = 0;
+$grandHit = 0;
+
+foreach ($targets as $target) {
+    $target = realpath($target) ?: $target;
+    $lines = $merged[$target] ?? [];
+    $exec = [];
+    $hit = [];
+    foreach ($lines as $line => $status) {
+        if ($status === -2) {
+            continue; // dead code
+        }
+        $exec[$line] = true;
+        if ($status === 1) {
+            $hit[$line] = true;
+        }
+    }
+    $total = count($exec);
+    $covered = count($hit);
+    $grandTotal += $total;
+    $grandHit += $covered;
+    $pct = $total > 0 ? round($covered * 100 / $total, 1) : 0.0;
+    $missing = array_diff(array_keys($exec), array_keys($hit));
+    sort($missing);
+    printf("%6.1f%%  %3d/%-3d  %s\n", $pct, $covered, $total, str_replace(getcwd() . '/', '', $target));
+    if ($missing && getenv('SHOW_MISSING')) {
+        echo '        manquantes: ' . implode(', ', $missing) . "\n";
+    }
+}
+
+if ($grandTotal > 0) {
+    printf("\nTOTAL: %d/%d (%.1f%%)\n", $grandHit, $grandTotal, $grandHit * 100 / $grandTotal);
+}
+echo 'dumps: ' . count($files) . "\n";