1 files changed, 68 insertions, 0 deletions
diff --git a/storage/mroonga/vendor/groonga/lib/mrb/scripts/require.rb b/storage/mroonga/vendor/groonga/lib/mrb/scripts/require.rb
new file mode 100644
index 00000000000..a824e92fa51
--- /dev/null
+++ b/storage/mroonga/vendor/groonga/lib/mrb/scripts/require.rb
@@ -0,0 +1,68 @@
+$" = [__FILE__]
+
+class ScriptLoader
+  @@loading_paths = {}
+
+  def initialize(path)
+    @base_path = path
+  end
+
+  def load_once
+    if absolete_path?(@base_path)
+      loaded = load_once_path(@base_path)
+      if loaded.nil?
+        raise LoadError, error_message
+      else
+        loaded
+      end
+    else
+      $LOAD_PATH.each do |load_path|
+        unless absolete_path?(load_path)
+          load_path = File.expand_path(load_path)
+        end
+        loaded = load_once_path(File.join(load_path, @base_path))
+        return loaded unless loaded.nil?
+      end
+      raise LoadError, error_message
+    end
+  end
+
+  private
+  def error_message
+    "cannot load such file -- #{@base_path}"
+  end
+
+  def absolete_path?(path)
+    path.start_with?("/")
+  end
+
+  def load_once_path(path)
+    loaded = load_once_absolete_path(path)
+    return loaded unless loaded.nil?
+
+    return nil unless File.extname(path).empty?
+
+    load_once_absolete_path("#{path}.rb")
+  end
+
+  def load_once_absolete_path(path)
+    return false if $".include?(path)
+    return false if @@loading_paths.key?(path)
+
+    return nil unless File.file?(path)
+
+    @@loading_paths[path] = true
+    load(path)
+    $" << path
+    @@loading_paths.delete(path)
+
+    true
+  end
+end
+
+module Kernel
+  def require(path)
+    loader = ScriptLoader.new(path)
+    loader.load_once
+  end
+end