Fix for mail unable to load in a non-rubygems environment

[cldwalker]

When trying to use mail in a non-rubygems environment i.e. with Rip:
$ ruby -r mail -e ''

 No such file or directory - /Users/bozo/.rip/irb/lib/mail/../../VERSION.yml (Errno::ENOENT)
 from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml.rb:143:in `open'
 from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml.rb:143:in `load_file'
 from /Users/bozo/.rip/irb/lib/mail/version.rb:6:in `version'

This happens because other non-rubygems environments can't find a VERSION.yml that exists in a project's top level directory. As explained in the ruby packaging standard, libraries must place all of their runtime code in its namespace under lib/. In the case of mail, all runtime code should be in mail.rb or lib/mail/.

My suggestion is to simply keep the versioning in lib/mail/version.rb and get rid of VERSION.yml. Here's a sample branch you could pull from to fix this: http://github.com/cldwalker/mail/tree/version I kept the versioning exactly how you like i.e. Mail::VERSION.version. To make it simpler, I would suggest just making it Mail::VERSION as I do with my projects.

I realize you have a number of tickets to look through but remember that until this gets fixed, mail won't work outside of rubygems and I'll have to maintain a functional fork for myself and others. Feel free to ask me to update the patch as you'd like and send a pull request.

Thanks for this gem,
Gabriel

[mikel]

I think you will find this is fixed in 2.2.5.2

Please check and reopen if still a problem.

[cldwalker]

Thanks for making the change. Works in rip now! I'd suggest in the future putting versioning within your namespace i.e. lib/mail/, as suggested by the ruby packaging standard. Rip follows this standard closely and thus unpacks gems in the same lib/. If two gems have a lib/VERSION, one gem ends up overwriting the other's.

[pboling]

This has been reopened by the (non)fix to #566

/VERSION needs to go here => lib/mail/VERSION