supply prebuilt library for macos

bin/setup.dart

@@ -36,9 +36,13 @@ Future<void> download(String platform) async {
       logger.stdout('${ansi.green}libgit2 for $platform is already available.');
     } else {
       logger.stdout(
-        '${ansi.red}libgit2 for $platform is outdated. Run: \n'
+        '${ansi.red}libgit2 for $platform is outdated.\n'
+        'If it is dart application run: \n'
+        'dart run libgit2dart:setup clean\n'
+        'dart run libgit2dart:setup\n\n'
+        'If it is flutter application run: \n'
         'flutter pub run libgit2dart:setup clean\n'
-        'flutter pub run libgit2dart:setup',
+        'flutter pub run libgit2dart:setup\n\n',
       );
     }
   } else {

lib/src/util.dart

@@ -67,7 +67,15 @@ DynamicLibrary loadLibrary(String name) {
       'To download the library, please run the following command from the '
       'root of your project:',
     );
-    logger.stdout('${ansi.yellow}dart run libgit2dart:setup${ansi.none}');
+    logger.stdout(
+      '${ansi.yellow}dart run libgit2dart:setup${ansi.none} for '
+      'dart application',
+    );
+    logger.stdout(ansi.none);
+    logger.stdout(
+      '${ansi.yellow}flutter pub run libgit2dart:setup${ansi.none} for '
+      'flutter application',
+    );
     logger.stdout(ansi.none);
     rethrow;
   }

macos/libgit2dart.podspec

@@ -15,7 +15,7 @@ Dart bindings to libgit2.
   s.source           = { :path => '.' }
   s.source_files     = 'Classes/**/*'
   s.dependency 'FlutterMacOS'
-  s.vendored_libraries = '../.dart_tool/libgit2/macos/libgit2-1.3.0.dylib'
+  s.vendored_libraries = 'libgit2-1.3.0.dylib'
 
   s.platform = :osx, '10.11'
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES' }