Class: Bundler::Standalone

# File 'lib/bundler/installer/standalone.rb', line 46

def gem_path(path, spec)
  full_path = Pathname.new(path).absolute? ? path : File.join(spec.full_gem_path, path)
  if spec.source.instance_of?(Source::Path)
    full_path
  else
    Pathname.new(full_path).relative_path_from(Bundler.root.join(bundler_path)).to_s
  end
rescue TypeError
  error_message = "#{spec.name} #{spec.version} has an invalid gemspec"
  raise Gem::InvalidSpecificationException.new(error_message)
end

# File 'lib/bundler/installer/standalone.rb', line 9

def generate
  SharedHelpers.filesystem_access(bundler_path) do |p|
    FileUtils.mkdir_p(p)
  end
  File.open File.join(bundler_path, "setup.rb"), "w" do |file|
    file.puts "require 'rbconfig'"
    file.puts reverse_rubygems_kernel_mixin
    paths.each do |path|
      if Pathname.new(path).absolute?
        file.puts %($:.unshift "#{path}")
      else
        file.puts %($:.unshift File.expand_path("\#{__dir__}/#{path}"))
      end
    end
  end
end

# File 'lib/bundler/installer/standalone.rb', line 28

def paths
  @specs.map do |spec|
    next if spec.name == "bundler"
    Array(spec.require_paths).map do |path|
      gem_path(path, spec).sub(version_dir, '#{RUBY_ENGINE}/#{RbConfig::CONFIG["ruby_version"]}')
      # This is a static string intentionally. It's interpolated at a later time.
    end
  end.flatten.compact
end

# File 'lib/bundler/installer/standalone.rb', line 58

def reverse_rubygems_kernel_mixin
  <<~END
  kernel = (class << ::Kernel; self; end)
  [kernel, ::Kernel].each do |k|
    if k.private_method_defined?(:gem_original_require)
      private_require = k.private_method_defined?(:require)
      k.send(:remove_method, :require)
      k.send(:define_method, :require, k.instance_method(:gem_original_require))
      k.send(:private, :require) if private_require
    end
  end
  END
end

# File 'lib/bundler/installer/standalone.rb', line 38

def version_dir
  "#{RUBY_ENGINE}/#{RbConfig::CONFIG["ruby_version"]}"
end