Module: ChildProcess

Defined in:
lib/childprocess.rb,
lib/childprocess/unix.rb,
lib/childprocess/errors.rb,
lib/childprocess/unix/io.rb,
lib/childprocess/version.rb,
lib/childprocess/windows.rb,
lib/childprocess/windows/io.rb,
lib/childprocess/abstract_io.rb,
lib/childprocess/unix/process.rb,
lib/childprocess/windows/process.rb,
lib/childprocess/abstract_process.rb,
lib/childprocess/process_spawn_process.rb

Defined Under Namespace

Modules: Unix, Windows Classes: AbstractIO, AbstractProcess, Error, InvalidEnvironmentVariable, LaunchError, ProcessSpawnProcess, SubclassResponsibility, TimeoutError

Constant Summary collapse

VERSION = 
'5.1.0'

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.logger ⇒ Object 



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# File 'lib/childprocess.rb', line 28

def logger
  return @logger if defined?(@logger) and @logger

  @logger = Logger.new($stderr)
  @logger.level = $DEBUG ? Logger::DEBUG : Logger::INFO

  @logger
end

Class Method Details

.arch ⇒ Object 



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# File 'lib/childprocess.rb', line 105

def arch
  @arch ||= (
    host_cpu = RbConfig::CONFIG['host_cpu'].downcase
    case host_cpu
    when /i[3456]86/
      if workaround_older_macosx_misreported_cpu?
        # Workaround case: older 64-bit Darwin Rubies misreported as i686
        "x86_64"
      else
        "i386"
      end
    when /amd64|x86_64/
      "x86_64"
    when /ppc|powerpc/
      "powerpc"
    else
      host_cpu
    end
  )
end

.close_on_exec(file) ⇒ Object

By default, a child process will inherit open file descriptors from the parent process. This helper provides a cross-platform way of making sure that doesn’t happen for the given file/io.



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# File 'lib/childprocess.rb', line 132

def close_on_exec(file)
  if file.respond_to?(:close_on_exec=)
    file.close_on_exec = true
  else
    raise Error, "not sure how to set close-on-exec for #{file.inspect} on #{platform_name.inspect}"
  end
end

.jruby? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/childprocess.rb', line 53

def jruby?
  RUBY_ENGINE == 'jruby'
end

.linux? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/childprocess.rb', line 49

def linux?
  os == :linux
end

.new(*args) ⇒ Object Also known as: build 



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# File 'lib/childprocess.rb', line 16

def new(*args)
  case os
  when :macosx, :linux, :solaris, :bsd, :cygwin, :aix
    Unix::Process.new(*args)
  when :windows
    Windows::Process.new(*args)
  else
    raise Error, "unsupported platform #{platform_name.inspect}"
  end
end

.os ⇒ Object 



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# File 'lib/childprocess.rb', line 77

def os
  return :windows if ENV['FAKE_WINDOWS'] == 'true'

  @os ||= (
    require "rbconfig"
    host_os = RbConfig::CONFIG['host_os'].downcase

    case host_os
    when /linux/
      :linux
    when /darwin|mac os/
      :macosx
    when /mswin|msys|mingw32/
      :windows
    when /cygwin/
      :cygwin
    when /solaris|sunos/
      :solaris
    when /bsd|dragonfly/
      :bsd
    when /aix/
      :aix
    else
      raise Error, "unknown os: #{host_os.inspect}"
    end
  )
end

.platform ⇒ Object 



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# File 'lib/childprocess.rb', line 37

def platform
  os
end

.platform_name ⇒ Object 



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# File 'lib/childprocess.rb', line 41

def platform_name
  @platform_name ||= "#{arch}-#{os}"
end

.posix_spawn=(bool) ⇒ Object

Set this to true to enable experimental use of posix_spawn.



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# File 'lib/childprocess.rb', line 73

def posix_spawn=(bool)
  @posix_spawn = bool
end

.posix_spawn? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/childprocess.rb', line 65

def posix_spawn?
  false
end

.posix_spawn_chosen_explicitly? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/childprocess.rb', line 61

def posix_spawn_chosen_explicitly?
  @posix_spawn || %w[1 true].include?(ENV['CHILDPROCESS_POSIX_SPAWN'])
end

.unix? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/childprocess.rb', line 45

def unix?
  !windows?
end

.windows? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/childprocess.rb', line 57

def windows?
  os == :windows
end