How to “re-install” a gem?

Question

Question is pretty simple so instead of writting two commands is there one substitute? eg

gem uninstall subexec

gem install subexec

Is there just re-install, or something similar?

Answer 1

Depending on what you're trying to achieve, the following restores the gem to the contents of the .gem file:

gem pristine <gem name here>

You can also run that with --all if you want to clean your entire set of installed gems.

Answer 2

No, there's no such command. You can, however, fit them on one line, if that's what you seek.

gem uninstall subexec && gem install subexec

Answer 3

Nope, you have to do an uninstall and install.

http://docs.rubygems.org/read/book/2

Answer 4

如果您使用bundler进行gem安装，那么您需要做的就是编辑gemfile然后运行bundle install。

Answer 5

gem update <gem-name>

would update to latest available version. or

gem update

would update all gems to latest versions.