Notes about Rubygems, the Ruby package manager.
View installed gems
gem list
gem list [package]
View available updates
gem outdated
View gem versions available
To show the most recent version:
gem list --remote --versions
gem list [package] --remote --versions
To show all versions, add the –all flag:
gem list --remote --versions --all
gem list [package] --remote --versions --all
Install a particular gem version
gem install [package] -v [version]
E.g. gem install radiant -v 0.9.0
Gem is not installed
If you have a gem installed and it won’t uninstall, as follows…
bpc steph # gem list vlad
*** LOCAL GEMS ***
vlad (2.0.0)
vlad-git (2.1.0)
bpc steph # gem uninstall vlad
INFO: gem "vlad" is not installed
…then try updating it first and then uninstalling:
bpc steph # gem update vlad
Updating installed gems
Updating vlad
Fetching: rake-remote_task-2.1.0.gem (100%)
Fetching: vlad-2.3.0.gem (100%)
Successfully installed rake-remote_task-2.1.0
Successfully installed vlad-2.3.0
Updating vlad-git
Fetching: vlad-git-2.2.0.gem (100%)
Successfully installed vlad-git-2.2.0
Gems updated: rake-remote_task, vlad, vlad-git
Installing ri documentation for rake-remote_task-2.1.0...
Installing ri documentation for vlad-2.3.0...
Installing ri documentation for vlad-git-2.2.0...
Installing RDoc documentation for rake-remote_task-2.1.0...
Installing RDoc documentation for vlad-2.3.0...
Installing RDoc documentation for vlad-git-2.2.0...
bpc steph # gem list vlad
*** LOCAL GEMS ***
vlad (2.3.0, 2.0.0)
vlad-git (2.2.0, 2.1.0)
bpc steph # gem uninstall vlad
You have requested to uninstall the gem:
vlad-2.3.0
vlad-git-2.2.0 depends on [vlad (>= 2.1.0)]
If you remove this gems, one or more dependencies will not be met.
Continue with Uninstall? [Yn] Y
Successfully uninstalled vlad-2.3.0
However, this didn’t seem to work for all gems.
Instead, I had to uninstall rubygems, manually remove the gem directories then reinstall rubygems and all gems. Annoying.
I removed the following directories after uninstalling rubygems (on my 64 bit gentoo box):
/usr/lib64/ruby/gems/1.8
/usr/local/lib64/ruby/gems/1.8
~/.gem
