From: Stefano Crocco <stefano.crocco@...>
Date: 2007-05-17T00:02:03+09:00
Subject: Re: Why doesn't a renamed file adhere to an original variable?

Alle mercoled狸 16 maggio 2007, Peter Bailey ha scritto:
> I need to send some graphics file over to UNIX land, but, without an
> extension. So, I rename the files and try to send them, and, Ruby
> complains that the file isn't there. Why is it that a file rename
> doesn't continue to be legitimate with the original variable name? When
> it's time to "put" the file, Ruby says that the file doesn't exist, I
> guess because it still think that the variable is pointing to the file
> with the extension. What's the point of File.rename if the files can't
> stick with the variable names?
>
> Thanks a lot,
> Peter
>
>
> require 'net/ftp'
> ...
>
> Dir.glob("*.100").each do |arborfile|
>   File.rename(arborfile, File.basename(arborfile, ".100"))
>   ftp.putbinaryfile(arborfile.downcase)
> ...

arborfire is simply a string, it's not related with a file at all. File.rename 
changes the name of the file on the filesystem. When you use 
ftp.putbinaryfile, you pass it the old filename, which doesn't refer to a 
file anymore, since you renamed it. What you want is this:

Dir.glob("*.100").each do |arborfile|
  new_name = File.basename(arborfile, ".100")
  File.rename arborfile, new_name
  ftp.putbinaryfile(new_name.downcase)
...

I hope this helps

Stefano