Install Gem from Github Branch?

In my gemfile I have this:

gem "authlogic", :git => "git://github.com/odorcicd/authlogic.git", :branch => "rails3"

How do I install that as a gem so I can test it?

Solution 1:

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" }

Solution 2:

Clone the Git repository.

$ git clone git://github.com/odorcicd/authlogic.git

Change to the new directory.
```
cd authlogic
```

Checkout branch

$ git checkout -b rails3 remotes/origin/rails3

Build the gem.
```
$ rake build gem
```
Install the gem.
```
$ gem install pkg/gemname-1.23.gem
```

Solution 3:

I have to modify @janic_'s answer to make it work. Hope it will help other ruby noobs like myself.