Undefined local variable or method `git_source' for Gemfile

Question

Cloned a rails application from github, works on the original dev's machine using the same version of rails (5.0.1).

Any rails command run from the app directory fails with:

Undefined local variable or method `git_source' for Gemfile

Relevant Gemfile section:

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end

Answer 1

git_source was introduced in Bundler 1.6.0.

To update bundler run:

$ gem update bundler

Answer 2

In your console, run…

gem update bundler
bundle install