# frozen_string_literal: true
module Bundler
class Standalone
def initialize(groups, definition)
@specs = definition.specs_for(groups)
end
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 prevent_gem_activation
file.puts define_path_helpers
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
private
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}/#{Gem.ruby_api_version}').
sub(extensions_dir, 'extensions/\k<platform>/#{Gem.extension_api_version}')
# This is a static string intentionally. It's interpolated at a later time.
end
end.flatten.compact
end
def version_dir
"#{RUBY_ENGINE}/#{Gem.ruby_api_version}"
end
def extensions_dir
%r{extensions/(?<platform>[^/]+)/#{Regexp.escape(Gem.extension_api_version)}}
end
def bundler_path
Bundler.root.join(Bundler.settings[:path].to_s, "bundler")
end
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) && spec.source.path.absolute?
full_path
else
SharedHelpers.relative_path_to(full_path, from: Bundler.root.join(bundler_path))
end
end
def prevent_gem_activation
<<~'END'
module Kernel
remove_method(:gem) if private_method_defined?(:gem)
def gem(*)
end
private :gem
end
END
end
def define_path_helpers
<<~'END'
unless defined?(Gem)
module Gem
def self.ruby_api_version
RbConfig::CONFIG["ruby_version"]
end
def self.extension_api_version
if 'no' == RbConfig::CONFIG['ENABLE_SHARED']
"#{ruby_api_version}-static"
else
ruby_api_version
end
end
end
end
END
end
def reverse_rubygems_kernel_mixin
<<~END
if Gem.respond_to?(:discover_gems_on_require=)
Gem.discover_gems_on_require = false
else
[::Kernel.singleton_class, ::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
end
end
end
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