From: Alex Young <alex@...>
Date: 2011-03-16T05:29:26+09:00
Subject: Proposal: require to return path to loaded file

If you're doing anything at all involved with $LOAD_PATH, it can be a
right pain trying to track down which file was actually loaded. It would
*really* help debugging if require returned the full path to the file.

Would this break anything? Alternatively, is there any other way to get
at this information?

While I admit that I haven't exactly tested it extensively, it's about
as simple a patch as you can get. In 1.8.7-p302, it's:


diff --git a/eval.c b/eval.c
index 7156c06..ca4d99b 100644
--- a/eval.c
+++ b/eval.c
@@ -7455,7 +7455,7 @@ rb_require_safe(fname, safe)
                    break;
                }
                rb_provide_feature(feature);
-               result = Qtrue;
+               result = path;
            }
        }
     }

Running this gives (obviously):

$ ruby -e 'p require "socket"'
"/home/alex/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/i686-linux/socket.so"


From a cursory inspection, it looks like the same idea ought to apply to
load.c in 1.9.2. Thoughts, anyone? Given that it's this simple and I
can't be the first person to have thought of it, is there a reason it's
the way it is?

--
Alex

-- 
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