module Gem::Util

This module contains various utility methods as module methods.

Public Class Methods

correct_for_windows_path(path) click to toggle source

Corrects path (usually returned by `URI.parse().path` on Windows), that comes with a leading slash.

# File lib/rubygems/util.rb, line 99
def self.correct_for_windows_path(path)
  if path[0].chr == '/' && path[1].chr =~ /[a-z]/i && path[2].chr == ':'
    path[1..-1]
  else
    path
  end
end
glob_files_in_dir(glob, base_path) click to toggle source

Globs for files matching pattern inside of directory, returning absolute paths to the matching files.

# File lib/rubygems/util.rb, line 87
def self.glob_files_in_dir(glob, base_path)
  if RUBY_VERSION >= "2.5"
    Dir.glob(glob, base: base_path).map! {|f| File.expand_path(f, base_path) }
  else
    Dir.glob(File.expand_path(glob, base_path))
  end
end
gunzip(data) click to toggle source

Zlib::GzipReader wrapper that unzips data.

# File lib/rubygems/util.rb, line 12
def self.gunzip(data)
  require 'zlib'
  require 'stringio'
  data = StringIO.new(data, 'r')

  unzipped = Zlib::GzipReader.new(data).read
  unzipped.force_encoding Encoding::BINARY
  unzipped
end
gzip(data) click to toggle source

Zlib::GzipWriter wrapper that zips data.

# File lib/rubygems/util.rb, line 25
def self.gzip(data)
  require 'zlib'
  require 'stringio'
  zipped = StringIO.new(String.new, 'w')
  zipped.set_encoding Encoding::BINARY

  Zlib::GzipWriter.wrap zipped do |io|
    io.write data
  end

  zipped.string
end
inflate(data) click to toggle source

A Zlib::Inflate#inflate wrapper

# File lib/rubygems/util.rb, line 41
def self.inflate(data)
  require 'zlib'
  Zlib::Inflate.inflate data
end
popen(*command) click to toggle source

This calls IO.popen and reads the result

# File lib/rubygems/util.rb, line 49
def self.popen(*command)
  IO.popen command, &:read
end
silent_system(*command) click to toggle source

Invokes system, but silences all output.

# File lib/rubygems/util.rb, line 56
def self.silent_system(*command)
  opt = {:out => IO::NULL, :err => [:child, :out]}
  if Hash === command.last
    opt.update(command.last)
    cmds = command[0...-1]
  else
    cmds = command.dup
  end
  system(*(cmds << opt))
end
traverse_parents(directory, &block) click to toggle source

Enumerates the parents of directory.

# File lib/rubygems/util.rb, line 70
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