fix: resolve pub cache fallback by discovering versioned package directory

.github/workflows/ci.yml

@@ -133,6 +133,37 @@ jobs:
       - run: dart pub get
       - run: dart test
 
+      - name: Test pub cache fallback (AOT compiled binary)
+        run: |
+          ARCH=$(uname -m)
+          if [ "$ARCH" = "arm64" ]; then LIB_ARCH="arm64"; else LIB_ARCH="x86_64"; fi
+          LIB_NAME="libsysres-darwin-${LIB_ARCH}.dylib"
+
+          # Create a minimal Dart script that uses the library
+          cat > /tmp/test_pub_cache.dart << 'SCRIPT'
+          import 'package:system_resources_2/system_resources_2.dart';
+          void main() {
+            SystemResources.init();
+            final mem = SystemResources.memUsage();
+            assert(mem > 0, 'Expected positive memory usage');
+            print('SUCCESS: memUsage=$mem');
+          }
+          SCRIPT
+
+          # Set up a fake pub cache with the versioned directory structure
+          FAKE_CACHE="/tmp/fake-pub-cache"
+          PKG_DIR="$FAKE_CACHE/hosted/pub.dev/system_resources_2-2.2.1/lib/build"
+          mkdir -p "$PKG_DIR"
+          cp "lib/build/$LIB_NAME" "$PKG_DIR/"
+
+          # Compile to a native executable
+          dart compile exe /tmp/test_pub_cache.dart --packages=.dart_tool/package_config.json -o /tmp/test_pub_cache
+
+          # Run from /tmp with only the fake pub cache available
+          # HOME=/nonexistent ensures no real ~/.pub-cache is found
+          cd /tmp
+          HOME=/nonexistent PUB_CACHE="$FAKE_CACHE" ./test_pub_cache
+
   test-container:
     name: test-container (${{ matrix.arch }})
     strategy:

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.2.2
+
+- Fix pub cache fallback path missing version suffix for macOS native library loading in AOT-compiled binaries
+
 ## 2.2.1
 
 - Log warning to stderr when running on Windows or other unsupported platforms

lib/src/macos_native.dart

@@ -120,8 +120,31 @@ class MacOsNative {
     if (homeDir.isNotEmpty) {
       final pubCachePath =
           Platform.environment['PUB_CACHE'] ?? '$homeDir/.pub-cache';
-      locations.add(
-          '$pubCachePath/hosted/pub.dev/system_resources_2/lib/build/$libName');
+      try {
+        final hostedDir = Directory('$pubCachePath/hosted/pub.dev');
+        if (hostedDir.existsSync()) {
+          final matches = hostedDir
+              .listSync()
+              .whereType<Directory>()
+              .where((d) {
+                final name = d.uri.pathSegments
+                    .lastWhere((s) => s.isNotEmpty, orElse: () => '');
+                return name.startsWith('system_resources_2-');
+              })
+              .toList()
+            ..sort((a, b) => _compareVersionedDirs(
+                  b.uri.pathSegments
+                      .lastWhere((s) => s.isNotEmpty, orElse: () => ''),
+                  a.uri.pathSegments
+                      .lastWhere((s) => s.isNotEmpty, orElse: () => ''),
+                ));
+          for (final dir in matches) {
+            locations.add('${dir.path}/lib/build/$libName');
+          }
+        }
+      } catch (_) {
+        // Ignore errors from directory listing (e.g. permission issues)
+      }
     }
 
     // Try each location
@@ -177,6 +200,24 @@ class MacOsNative {
     return _getMemoryUsedBytes!();
   }
 
+  /// Compare two versioned directory names for sorting.
+  ///
+  /// Expects names like `system_resources_2-2.2.1`. Extracts the version
+  /// suffix and compares numerically by major.minor.patch.
+  static int _compareVersionedDirs(String a, String b) {
+    final aVerStr = a.split('system_resources_2-').last;
+    final bVerStr = b.split('system_resources_2-').last;
+    final aParts = aVerStr.split('.').map((s) => int.tryParse(s) ?? 0).toList();
+    final bParts = bVerStr.split('.').map((s) => int.tryParse(s) ?? 0).toList();
+    final len = aParts.length > bParts.length ? aParts.length : bParts.length;
+    for (var i = 0; i < len; i++) {
+      final av = i < aParts.length ? aParts[i] : 0;
+      final bv = i < bParts.length ? bParts[i] : 0;
+      if (av != bv) return av.compareTo(bv);
+    }
+    return 0;
+  }
+
   static void _ensureInitialized() {
     if (!_initialized) {
       throw StateError(

pubspec.yaml

@@ -1,6 +1,6 @@
 name: system_resources_2
 description: Provides easy access to system resources (CPU load, memory usage).
-version: 2.2.1
+version: 2.2.2
 repository: https://github.com/serverpod/system_resources_2
 homepage: https://github.com/serverpod/system_resources_2#readme