Expose rugged exception handling.

ext/rugged/rugged.c

@@ -346,6 +346,12 @@ void rugged_exception_raise(void)
 	rb_exc_raise(err_obj);
 }
 
+VALUE rb_git_raise_exception(VALUE self)
+{
+	rugged_exception_raise();
+	return Qnil;
+}
+
 VALUE rugged__block_yield_splat(VALUE args) {
 	VALUE block = rb_ary_shift(args);
 	int n = RARRAY_LENINT(args);
@@ -451,6 +457,8 @@ void Init_rugged(void)
 	rb_define_module_function(rb_mRugged, "prettify_message", rb_git_prettify_message, -1);
 	rb_define_module_function(rb_mRugged, "__cache_usage__", rb_git_cache_usage, 0);
 
+	rb_define_private_method(rb_singleton_class(rb_mRugged), "__raise_exception__", rb_git_raise_exception, 0);
+
 	Init_rugged_reference();
 	Init_rugged_reference_collection();
 

test/lib_test.rb

@@ -18,6 +18,14 @@ def test_libgit2_version
     end
   end
 
+  def test_raise_exception
+    # Ensure libgit2 error state is cleared
+    Rugged.send(:__raise_exception__) rescue nil
+
+    err = assert_raises(RuntimeError) { Rugged.send(:__raise_exception__) }
+    assert_equal "Rugged operation failed", err.message
+  end
+
   def test_options
     Rugged::Settings['mwindow_size'] = 8 * 1024 * 1024
     Rugged::Settings['mwindow_mapped_limit'] = 8 * 1024 * 1024
@@ -141,4 +149,3 @@ def test_prettify_commit_messages
     assert_equal clean_message, Rugged::prettify_message(message, true)
   end
 end
-