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Module: Gem::Util

Relationships & Source Files
Defined in: lib/rubygems/util.rb

Overview

This module contains various utility methods as module methods.

Class Method Summary

Class Method Details

.correct_for_windows_path(path)

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

[ GitHub ] 

  


# File 'lib/rubygems/util.rb', line 105



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)  
  



  

    

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


  



  [ GitHub ]


  

  


# File 'lib/rubygems/util.rb', line 93



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)  
  



  

    

Zlib::GzipReader wrapper that unzips data.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/util.rb', line 12



def self.gunzip(data)
  require 'zlib'
  require 'stringio'
  data = StringIO.new(data, 'r')

  gzip_reader = begin
                  Zlib::GzipReader.new(data)
                rescue Zlib::GzipFile::Error => e
                  raise e.class, e.inspect, e.backtrace
                end

  unzipped = gzip_reader.read
  unzipped.force_encoding Encoding::BINARY
  unzipped
end


  








  

    .gzip(data)  
  



  

    

Zlib::GzipWriter wrapper that zips data.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/util.rb', line 31



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)  
  



  

    

A Zlib::Inflate#inflate wrapper


  



  [ GitHub ]


  

  


# File 'lib/rubygems/util.rb', line 47



def self.inflate(data)
  require 'zlib'
  Zlib::Inflate.inflate data
end


  








  

    .popen(*command)  
  



  

    

This calls IO.popen and reads the result


  



  [ GitHub ]


  

  


# File 'lib/rubygems/util.rb', line 55



def self.popen(*command)
  IO.popen command, &:read
end


  








  

    .silent_system(*command)  
  



  

    

Invokes system, but silences all output.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/util.rb', line 62



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)  
  



  

    

Enumerates the parents of directory.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/util.rb', line 76



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