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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?
switch_local_copy_if_needed
reexec_if_needed
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, $0, *ARGV].compact
ENV["RUBYOPT"] = "-I#{local_copy_path.join("lib")} #{ENV["RUBYOPT"]}"
exec(ENV, *cmd)
end
def switch_local_copy_if_needed
return unless local_copy_switch_needed?
Dir.chdir(local_copy_path) do
sys_exec!("git remote update")
sys_exec!("git checkout #{target_tag} --quiet")
end
ENV["RGV"] = local_copy_path.to_s
end
def rubygems_unrequire_needed?
!$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
Dir.chdir(local_copy_path) do
sys_exec!("git rev-parse --abbrev-ref HEAD")
end
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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