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|
# frozen_string_literal: true
require "pathname"
require_relative "helpers"
require_relative "path"
class RubygemsVersionManager
include Spec::Helpers
include Spec::Path
def initialize(source)
@source = source
end
def switch
return if use_system?
assert_system_features_not_loaded!
switch_local_copy_if_needed
reexec_if_needed
end
def assert_system_features_not_loaded!
at_exit do
rubylibdir = RbConfig::CONFIG["rubylibdir"]
rubygems_path = rubylibdir + "/rubygems"
rubygems_default_path = rubygems_path + "/defaults"
bundler_path = rubylibdir + "/bundler"
bundler_exemptions = Gem.rubygems_version < Gem::Version.new("3.2.0") ? [bundler_path + "/errors.rb"] : []
bad_loaded_features = $LOADED_FEATURES.select do |loaded_feature|
(loaded_feature.start_with?(rubygems_path) && !loaded_feature.start_with?(rubygems_default_path)) ||
(loaded_feature.start_with?(bundler_path) && !bundler_exemptions.any? {|bundler_exemption| loaded_feature.start_with?(bundler_exemption) })
end
if bad_loaded_features.any?
raise "the following features were incorrectly loaded:\n#{bad_loaded_features.join("\n")}"
end
end
end
private
def use_system?
@source.nil?
end
def reexec_if_needed
return unless rubygems_unrequire_needed?
require "rbconfig"
ruby = File.join(RbConfig::CONFIG["bindir"], RbConfig::CONFIG["ruby_install_name"])
ruby << RbConfig::CONFIG["EXEEXT"]
cmd = [ruby, $0, *ARGV].compact
ENV["RUBYOPT"] = opt_add("-I#{local_copy_path.join("lib")}", opt_remove("--disable-gems", ENV["RUBYOPT"]))
exec(ENV, *cmd)
end
def switch_local_copy_if_needed
return unless local_copy_switch_needed?
sys_exec!("git remote update", :dir => local_copy_path)
sys_exec!("git checkout #{target_tag} --quiet", :dir => local_copy_path)
ENV["RGV"] = local_copy_path.to_s
end
def rubygems_unrequire_needed?
!$LOADED_FEATURES.include?(local_copy_path.join("lib/rubygems.rb").to_s)
end
def local_copy_switch_needed?
!source_is_path? && target_tag != local_copy_tag
end
def target_tag
@target_tag ||= resolve_target_tag
end
def local_copy_tag
sys_exec!("git rev-parse --abbrev-ref HEAD", :dir => local_copy_path)
end
def local_copy_path
@local_copy_path ||= resolve_local_copy_path
end
def resolve_local_copy_path
return expanded_source if source_is_path?
rubygems_path = root.join("tmp/rubygems")
unless rubygems_path.directory?
rubygems_path.parent.mkpath
sys_exec!("git clone https://github.com/rubygems/rubygems.git #{rubygems_path}")
end
rubygems_path
end
def source_is_path?
expanded_source.directory?
end
def expanded_source
@expanded_source ||= Pathname.new(@source).expand_path(root)
end
def resolve_target_tag
return "v#{@source}" if @source.match(/^\d/)
@source
end
end
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