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Direktori : /proc/self/root/opt/alt/ruby25/lib64/ruby/2.5.0/rubygems/ |
Current File : //proc/self/root/opt/alt/ruby25/lib64/ruby/2.5.0/rubygems/util.rb |
# frozen_string_literal: true ## # This module contains various utility methods as module methods. module Gem::Util @silent_mutex = nil ## # Zlib::GzipReader wrapper that unzips +data+. def self.gunzip(data) require 'zlib' require 'stringio' data = StringIO.new(data, 'r') unzipped = Zlib::GzipReader.new(data).read unzipped.force_encoding Encoding::BINARY if Object.const_defined? :Encoding unzipped end ## # Zlib::GzipWriter wrapper that zips +data+. def self.gzip(data) require 'zlib' require 'stringio' zipped = StringIO.new(String.new, 'w') zipped.set_encoding Encoding::BINARY if Object.const_defined? :Encoding Zlib::GzipWriter.wrap zipped do |io| io.write data end zipped.string end ## # A Zlib::Inflate#inflate wrapper def self.inflate(data) require 'zlib' Zlib::Inflate.inflate data end ## # This calls IO.popen where it accepts an array for a +command+ (Ruby 1.9+) # and implements an IO.popen-like behavior where it does not accept an array # for a command. def self.popen *command IO.popen command, &:read rescue TypeError # ruby 1.8 only supports string command r, w = IO.pipe pid = fork do STDIN.close STDOUT.reopen w exec(*command) end w.close begin return r.read ensure Process.wait pid end end NULL_DEVICE = defined?(IO::NULL) ? IO::NULL : Gem.win_platform? ? 'NUL' : '/dev/null' ## # Invokes system, but silences all output. def self.silent_system *command opt = {:out => NULL_DEVICE, :err => [:child, :out]} if Hash === command.last opt.update(command.last) cmds = command[0...-1] else cmds = command.dup end return system(*(cmds << opt)) rescue TypeError require 'thread' @silent_mutex ||= Mutex.new null_device = NULL_DEVICE @silent_mutex.synchronize do begin stdout = STDOUT.dup stderr = STDERR.dup STDOUT.reopen null_device, 'w' STDERR.reopen null_device, 'w' return system(*command) ensure STDOUT.reopen stdout STDERR.reopen stderr stdout.close stderr.close end end end ## # Enumerates the parents of +directory+. def self.traverse_parents directory, &block return enum_for __method__, directory unless block_given? here = File.expand_path directory loop do Dir.chdir here, &block rescue Errno::EACCES new_here = File.expand_path('..', here) return if new_here == here # toplevel here = new_here end end end