AddGem

Command-line tool to append new gems to your Gemfile with pessimistic version constrain.

When adding a new gem to my Gemfile I found myself visiting http://rubygems.org/gems/GEM_NAME and checking the latest version.

I like to use pessimistic version constrain to avoid headaches. I have seen projects getting broken because major version updates, and people wasting their time trying to figure it out what it was.

I built this tool which receives the name of the gem and then adds a new entry to your Gemfile including the version with the pessimistic operator (~>).

$ cat Gemfile
source 'https://rubygems.org'

$ add_gem rails
$ Added gem "rails", "~> 3.2.8" to your Gemfile.

$ cat Gemfile
source 'https://rubygems.org'
gem "rails", "~> 3.2.8"

What's wrong with gem search rails -r you might be thinking? the answer is nothing, but why do something in more than one step when it can be done in one. :)

Install with rubygems:

gem install add_gem

And then execute on your working directory:

$ add_gem rails
$ Added gem "rails", "~> 3.2.8" to your Gemfile.

• Take as parameter a group and then add the gem under the given group.