Installing a Gem from Github with Bundler

How to install gem from GitHub source?

In case you are using bundler, you need to add something like this to your Gemfile:

gem 'redcarpet', :git => 'git://github.com/tanoku/redcarpet.git'

And in case there is .gemspec file, it should be able to fetch and install the gem when running bundle install.

UPD. As indicated in comments, for Bundler to function properly you also need to add the following to config.ru:

require "bundler" 
Bundler.setup(:default)

Install Gem from Github Branch?

You don't need to build the gem locally. In your gemfile you can specify a github source with a ref, branch or tag.

gem 'rails', git: 'git://github.com/rails/rails.git', ref: '4aded'
gem 'rails', git: 'git://github.com/rails/rails.git', branch: '2-3-stable'
gem 'rails', git: 'git://github.com/rails/rails.git', tag: 'v2.3.5'

Then you run bundle install or the short form is just bundle.

Read more about it here: http://bundler.io/man/gemfile.5.html#GIT

Update: There's a github source identifier.

gem 'country_select', github: 'stefanpenner/country_select'

However, they warn against using it: NOTE: This shorthand should be avoided until Bundler 2.0, since it currently expands to an insecure git:// URL. This allows a man-in-the-middle attacker to compromise your system.

After Bundler 2.0, you can get around the above issue with this statement near the top of the Gemfile:

git_source(:github) { |repo| "https://github.com/#{repo}.git" }

Bundle : Install gem from private github repository

Use the "SSH" or "HTTP" URLs to your private repo. For example:

# HTTP (I've found this to be more reliable)
gem 'test', :git => 'https://my_account@github.com/my_account/test.git'
# SSH
gem 'test', :git => 'git@github.com:my_account/test.git'

Don't guess them, though. You can get them by going to your github repo page... there are three options at the top.

It's normal to enter a password if it asks.

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