basic.rb

# Lightweight environment configuration.
#
# This file is useful when you want to load a small portion of the whole
# github environment for daemons that want to keep their resident memory
# usage low or commands that need to boot fast.
#
# Determine RAILS_ROOT from this file's location
if !defined?(RAILS_ROOT)
  ENV['RAILS_ROOT'] ||= File.expand_path('../..', __FILE__)
  RAILS_ROOT = ENV['RAILS_ROOT'].dup
end

# Determine RAILS_ENV from the environment or current hostname
if !defined?(RAILS_ENV)
  ENV['RAILS_ENV'] ||=
    if RAILS_ROOT == '/data/github/current'
      if `hostname`.include?('stg.github.com')
        'staging'
      else
        'production'
      end
    else
      'development'
    end
  RAILS_ENV = ENV['RAILS_ENV'].dup
end

# Disallow use of system gems by default in staging and production environments
# or when the GEM_STRICT environment variable is set. This ensures the gem
# environment is totally isolated to only stuff specified in the Gemfile.
if %w(staging production).include?(RAILS_ENV) || ENV['GEM_STRICT']
  ENV['GEM_PATH'] = "#{RAILS_ROOT}/vendor/gems"
  ENV['GEM_HOME'] = "#{RAILS_ROOT}/vendor/gems"
elsif !ENV['GEM_PATH'].to_s.include?("#{RAILS_ROOT}/vendor/gems")
  ENV['GEM_PATH'] =
    ["#{RAILS_ROOT}/vendor/gems", ENV['GEM_PATH']].compact.join(':')
end

# put RAILS_ROOT/bin on PATH
binpath = "#{RAILS_ROOT}/bin"
ENV['PATH'] = "#{binpath}:#{ENV['PATH']}" if !ENV['PATH'].include?(binpath)

# Setup bundled gem load path.
paths = File.read("#{RAILS_ROOT}/.bundle/loadpath").split("\n")
paths.each do |path|
  next if path =~ /^[ \t]*(?:#|$)/
  path = File.join(RAILS_ROOT, path)
  next if !File.directory?(path) || $:.include?(path)
  $:.unshift path
end

# Add RAILS_ROOT to load path so you can require config/initializers/file
# and stuff like that.
$:.unshift RAILS_ROOT

# Add RAILS_ROOT/lib to load path if it isn't already there
$:.unshift "#{RAILS_ROOT}/lib" if !$:.include?("#{RAILS_ROOT}/lib")

gistfile2.txt

startup

github git:(master) irb
>> require "bundler"
=> true
>> require "bundler/setup"
=> true
>> File.open(".bundle/loadpath", "w") { |fp| $:.each { |path| fp.puts(path) } }