Re: [gentoo-web-user] Java Script Libraries

[Adam Sroka <asroka@covad.net>]

Stuart Herbert wrote:
> Hrm ... all the code I've seen uses:
>
> 	require_gem "<package-name>"
>
> with no sign of version requirements passed around.  How does Gems
> handle the versioning in the background?
>
> Best regards,
> Stu
>   
That code is implicitly saying "use the latest version of 
<package-name>". However, Gems also lets you say:

require_gem '<package-name>', '>= 1.1.5'

One of the most useful things you can do is say: '~> 1.1'

This means, use the version closest to 1.1, but I don't care which minor 
revision you use. This will allow you to pick up new minor revisions 
that contain, for instance, a security patch, but not major revisions 
that might change the API.

For more info see here: http://docs.rubygems.org/read/chapter/16

Another thing that is great about Gems is that you can stand up a gem 
server and serve your own versions of any required libraries. All a user 
would have to do is point at your gem server, and they could use your 
version. This is analogous to having your own rsync server.
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