pre-commit

#!/usr/bin/env ruby
# A pre-commit hook script to ensure that no local gem dependencies (gem 'asdf', path: '~/local')
#  exist in your Gemfile before commiting.`
# Allows gems to be loaded from source within the current project, but not from outside.
puts 'Checking for local dependencies in your Gemfile.'
ROOT_PATH = File.expand_path('../../..', __FILE__)
begin
  require 'rubygems'
  gemfile = ENV['BUNDLE_GEMFILE'] || File.join(ROOT_PATH, 'Gemfile')
  require 'bundler/setup' if File.exists?(gemfile)
rescue => e
  puts 'There was an issue loading Bundler in the pre-commit git hook that ensures your Gemfile is not dependent on locally sourced gems.'
  puts 'Either the script is screwy, or your environment is misconfigured for Bundler.'
  raise e
else
  local_gems = Gem.loaded_specs.values.select do |g|
    local = g.source.instance_of? Bundler::Source::Path
    nested = Dir["#{ROOT_PATH}/**/*.gemspec"].any? do |filename|
      filename.include?(g.name)
    end
    local && !nested
  end
  unless local_gems.empty?
    raise SyntaxError,
      "You have local dependencies in your Gemfile:" \
      " #{local_gems.map{|g| g.name + ' is loading from ' + g.source.path.to_s}.join(', ')}." \
      " Remove the :path parameter from this/these gems in your Gemfile before commiting."
  else
    puts 'No local Gemfile dependencies detected. You\'re good to commit!'
  end
end