# Rake + FileUtils == warining **URL:** \ **Category:** Ruby\ **Created:** [August 29, 2007, 2:59pm UTC](https://www.ruby-forum.com/t/rake-fileutils-warining/113281 "2007-08-29T14:59:37Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![ronaldfischer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/67e7ee/32.png) [@ronaldfischer](https://www.ruby-forum.com/u/ronaldfischer)\ **Post date:** [August 29, 2007, 2:59pm UTC](https://www.ruby-forum.com/t/rake-fileutils-warining/113281/1 "2007-08-29T14:59:37Z")
When I require both rake and FileUtils, i.e. require ‘rake’ # for String#ext require ‘FileUtils’ I get the following warnings: c:/ruby186/lib/ruby/1.8/FileUtils.rb:93: warning: already initialized constant OPT\_TABLE c:/ruby186/lib/ruby/1.8/FileUtils.rb:1163: warning: already initialized constant S\_IF\_DOOR c:/ruby186/lib/ruby/1.8/FileUtils.rb:1513: warning: already initialized constant METHODS Who is to blame? FileUtils, rake, or me (because I’m not supposed to require both)? What can I do to avoid the warnings? Please do not suggest simply omitting FileUtils when I’m using rake (I guess the warning results from rake also including FileUtils). I don’t require them _directly_ in the same module. Instead I have require ‘rake’ require ‘SomeOtherModule’ in one file, and SomeOtherModule.rb happens to use FileUtils, and this causes the warnings in the end. Ronald ---
**Author:** ![ronaldfischer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/67e7ee/32.png) [@ronaldfischer](https://www.ruby-forum.com/u/ronaldfischer)\ **Post date:** [August 29, 2007, 3:03pm UTC](https://www.ruby-forum.com/t/rake-fileutils-warining/113281/2 "2007-08-29T15:03:37Z")
Ronald F. wrote: > constant S\_IF\_DOOR > I don’t require them _directly_ in the same module. Instead I have > > require ‘rake’ > require ‘SomeOtherModule’ > > in one file, and SomeOtherModule.rb happens to use FileUtils, and this > causes the > warnings in the end. > > Ronald Are you sure you don’t want to require ‘fileutils’ rather than ‘FileUtils’? The latter gives me errors while the former does not. Actually, it looks to me like rake (or possibly rubygems) requires fileutils anyway… ---
**Author:** ![ronaldfischer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/67e7ee/32.png) [@ronaldfischer](https://www.ruby-forum.com/u/ronaldfischer)\ **Post date:** [August 29, 2007, 3:22pm UTC](https://www.ruby-forum.com/t/rake-fileutils-warining/113281/3 "2007-08-29T15:22:40Z")
> > constant OPT\_TABLE > > [snip] > Are you sure you don’t want to require ‘fileutils’ rather than > ‘FileUtils’? Indeed, I needed to write it as ‘fileutils’ and the error disappears. Now I wonder why I never got an error before in my application (I had always required ‘FileUtils’ before, but got an error only when I also started to use rake. It seems that Ruby had at least included _something_ when I asked for FileUtils… ---
**Author:** ![ronaldfischer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/67e7ee/32.png) [@ronaldfischer](https://www.ruby-forum.com/u/ronaldfischer)\ **Post date:** [August 29, 2007, 11:56pm UTC](https://www.ruby-forum.com/t/rake-fileutils-warining/113281/4 "2007-08-29T23:56:38Z")
Ronald F. wrote: > > > constant OPT\_TABLE > > > when I also started to use rake. It seems that Ruby had at least > > > included _something_ when I asked for FileUtils… I think what’s happening here is a conflict between Ruby’s require mechanism being case sensitive, and Windows’ pathnames not being case sensitive. When you say ‘require “fileutils”’, Ruby remembers that it has seen something called “fileutils” so that it can avoid loading the same file twice. When you then ‘require “FileUtils”’ later, Ruby doesn’t think it has seen it before, because it’s in a different case, so it queries the filesystem. Because Windows doesn’t distinguish between upper and lower case, it returns the same file as before, which Ruby then tries to reload. The errors are thus from the same file being loaded twice, but via two different names that resolve to the same file. ---
**Author:** ![ronaldfischer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/67e7ee/32.png) [@ronaldfischer](https://www.ruby-forum.com/u/ronaldfischer)\ **Post date:** [August 29, 2007, 9:12pm UTC](https://www.ruby-forum.com/t/rake-fileutils-warining/113281/5 "2007-08-29T21:12:47Z")
Ronald F. wrote: > > > constant OPT\_TABLE > > > when I also started to use rake. It seems that Ruby had at least > > > included _something_ when I asked for FileUtils… > > – > Ronald F. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > Phone: +49-89-452133-162 The file to be required is /lib/ruby/1.8/fileutils.rb which implements the module FileUtils. require ‘filetuils’ =\> correct, embeds fileutils.rb into current file include FileUtils =\> correct, mixes in methods from FileUtils module into current class/module. At least, thats how I learned it… I’m no Ruby professional so don’t quote me. TerryP. ---
**Author:** ![ronaldfischer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/67e7ee/32.png) [@ronaldfischer](https://www.ruby-forum.com/u/ronaldfischer)\ **Post date:** [August 31, 2007, 9:24am UTC](https://www.ruby-forum.com/t/rake-fileutils-warining/113281/6 "2007-08-31T09:24:43Z")
> sensitive. > You are right! I’m pretty sure that was it! Thanks for the clarification. Ronald