Fix code coverage script by using the root-level package_config.json

pkg/code_coverage/bin/code_coverage.dart

@@ -53,7 +53,7 @@ Future<void> main() async {
         'run',
         'coverage:format_coverage',
         '--packages',
-        p.join(pkgDir, '.dart_tool', 'package_config.json'),
+        p.join(projectDir.path, '.dart_tool', 'package_config.json'),
         '-i',
         rawOutputDir,
         '--base-directory',

pkg/code_coverage/build.sh

@@ -61,7 +61,7 @@ rm ${APP_ALL_TEST_PATH}
 echo "Exporting to LCOV"
 cd "${APP_DIR}"
 dart run coverage:format_coverage \
-  --packages "${APP_DIR}/.dart_tool/package_config.json" \
+  --packages "${PROJECT_DIR}/.dart_tool/package_config.json" \
   -i "${OUTPUT_DIR}/raw/app_unit.json" \
   --base-directory "${PROJECT_DIR}" \
   --lcov \

pkg/code_coverage/lib/format_lcov.dart

@@ -56,8 +56,8 @@ Future main() async {
             !e.key.startsWith('pkg/pub_integration/'))
   ].nonNulls;
   final pubDevEntry = Entry('pub-dev')
-    ..covered = libEntries.map((e) => e.covered).reduce((a, b) => a + b)
-    ..total = libEntries.map((e) => e.total).reduce((a, b) => a + b);
+    ..covered = libEntries.map((e) => e.covered).fold(0, (a, b) => a + b)
+    ..total = libEntries.map((e) => e.total).fold(0, (a, b) => a + b);
   output.writeln([
     pubDevEntry.formatted('pub-dev'),
     _tree['app/lib']?.formatted('app'),

pkg/code_coverage/lib/test_runner.dart

@@ -118,18 +118,20 @@ Future<void> _convertToLcov(
   final out = File(outputFile);
   if (await out.exists()) return;
   await out.parent.create(recursive: true);
+  final baseDir =
+      Directory(packageDir.contains('/app') ? '../' : '../../').absolute.path;
   await Process.run(
     'dart',
     [
       'pub',
       'run',
       'coverage:format_coverage',
       '--packages',
-      '$packageDir/.dart_tool/package_config.json',
+      '$baseDir/.dart_tool/package_config.json',
       '-i',
       inputFile,
       '--base-directory',
-      packageDir.contains('/app') ? '../' : '../../',
+      baseDir,
       '--lcov',
       '--out',
       outputFile,