[Wtr-general] [OT] - Gem upgrade?

[Dave Burt]

Raghu Venkataramana wrote:
> Dave Burt wrote:
>> Use this command to remove all old versions of gems you have installed:
>>
>> gem cleanup
>>
>> However, as Bret said, there's no harm in leaving them there. 
>>
> Nope. With two versions(and as time goes by it could be more than two) 
> of  a gem library, the
> script sometimes pickups the API from the wrong gem and fails.

A normal require should get the most recent version. Often people use
require_gem to demand a version of a library that works with that program.

 require_gem "something", "<=0.6"

> The trouble is that every script will have to be changed whenever the 
> version is changed.

The point is that you _don't_ need to change your script, the script
just uses the old version of the library.

> As of now, I am first doing a gem uninstall <lib_old> -a and then do a 
> gem install <lib_new>

Why not just use "gem cleanup"?

Cheers,
Dave