class Bundler::RubygemsIntegration

def replace_bin_path(specs)
  gem_class = (class << Gem; self; end)
  redefine_method(gem_class, :bin_path) do |name, *args|
    exec_name = args.first
    return ENV["BUNDLE_BIN_PATH"] if exec_name == "bundle"
    spec = nil
    if exec_name
      spec = specs.find {|s| s.executables.include?(exec_name) }
      raise(Gem::Exception, "can't find executable #{exec_name}") unless spec
      unless spec.name == name
        warn "Bundler is using a binstub that was created for a different gem.\n" \
          "This is deprecated, in future versions you may need to `bundle binstub #{name}` " \
          "to work around a system/bundle conflict."
      end
    else
      spec = specs.find {|s| s.name == name }
      raise Gem::Exception, "no default executable for #{spec.full_name}" unless exec_name = spec.default_executable
    end
    gem_bin = File.join(spec.full_gem_path, spec.bindir, exec_name)
    gem_from_path_bin = File.join(File.dirname(spec.loaded_from), spec.bindir, exec_name)
    File.exist?(gem_bin) ? gem_bin : gem_from_path_bin
  end
end