add File.path

1 files changed, 10 insertions, 0 deletions

diff --git a/mrblib/file.rb b/mrblib/file.rb
index aa0981930..f644ff691 100644
--- a/mrblib/file.rb
+++ b/mrblib/file.rb
@@ -170,4 +170,14 @@ class File < IO
     ext = fname.split('.').last
     ext.empty? ? '' : ".#{ext}"
   end
+
+  def self.path(filename)
+    if filename.kind_of?(String)
+      filename
+    elsif filename.respond_to?(:to_path)
+      filename.to_path
+    else
+      raise TypeError, "no implicit conversion of #{filename.class} into String"
+    end
+  end
 end