# frozen_string_literal: true
require "rbconfig"
##
# A TargetConfig is a wrapper around an RbConfig object that provides a
# consistent interface for querying configuration for *deployment target
# platform*, where the gem being installed is intended to run on.
#
# The TargetConfig is typically created from the RbConfig of the running Ruby
# process, but can also be created from an RbConfig file on disk for cross-
# compiling gems.
class Gem::TargetRbConfig
attr_reader :path
def initialize(rbconfig, path)
@rbconfig = rbconfig
@path = path
end
##
# Creates a TargetRbConfig for the platform that RubyGems is running on.
def self.for_running_ruby
new(::RbConfig, nil)
end
##
# Creates a TargetRbConfig from the RbConfig file at the given path.
# Typically used for cross-compiling gems.
def self.from_path(rbconfig_path)
namespace = Module.new do |m|
# Load the rbconfig.rb file within a new anonymous module to avoid
# conflicts with the rbconfig for the running platform.
Kernel.load rbconfig_path, m
end
rbconfig = namespace.const_get(:RbConfig)
new(rbconfig, rbconfig_path)
end
##
# Queries the configuration for the given key.
def [](key)
@rbconfig::CONFIG[key]
end
end
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