Module: IRB::IrbLoader

Included in:
ExtendCommand::Load, ExtendCommand::Require, ExtendCommand::Source
Defined in:
lib/irb/ext/loader.rb

Overview

Provides a few commands for loading files within an irb session.

See ExtendCommandBundle for more information.

Instance Method Summary collapse

Instance Method Details

#irb_load(fn, priv = nil) ⇒ Object

Loads the given file similarly to Kernel#load

Raises:

  • (LoadError)

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# File 'lib/irb/ext/loader.rb', line 27

def irb_load(fn, priv = nil)
  path = search_file_from_ruby_path(fn)
  raise LoadError, "No such file to load -- #{fn}" unless path

  load_file(path, priv)
end

#load_file(path, priv = nil) ⇒ Object

Loads the given file in the current session's context and evaluates it.

See Irb#suspend_input_method for more information.


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# File 'lib/irb/ext/loader.rb', line 73

def load_file(path, priv = nil)
  irb.suspend_name(path, File.basename(path)) do

    if priv
      ws = WorkSpace.new(Module.new)
    else
      ws = WorkSpace.new
    end
    irb.suspend_workspace(ws) do
      irb.suspend_input_method(FileInputMethod.new(path)) do
        |back_io|
        irb.signal_status(:IN_LOAD) do
          if back_io.kind_of?(FileInputMethod)
            irb.eval_input
          else
            begin
              irb.eval_input
            rescue LoadAbort
              print "load abort!!\n"
            end
          end
        end
      end
    end
  end
end

#oldObject

:nodoc:


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# File 'lib/irb/ext/loader.rb', line 100

def old # :nodoc:
  back_io = @io
  back_path = @irb_path
  back_name = @irb_name
  back_scanner = @irb.scanner
  begin
    @io = FileInputMethod.new(path)
    @irb_name = File.basename(path)
    @irb_path = path
    @irb.signal_status(:IN_LOAD) do
      if back_io.kind_of?(FileInputMethod)
        @irb.eval_input
      else
        begin
          @irb.eval_input
        rescue LoadAbort
          print "load abort!!\n"
        end
      end
    end
  ensure
    @io = back_io
    @irb_name = back_name
    @irb_path = back_path
    @irb.scanner = back_scanner
  end
end

#search_file_from_ruby_path(fn) ⇒ Object

:nodoc:


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# File 'lib/irb/ext/loader.rb', line 34

def search_file_from_ruby_path(fn) # :nodoc:
  if /^#{Regexp.quote(File::Separator)}/ =~ fn
    return fn if File.exist?(fn)
    return nil
  end

  for path in $:
    if File.exist?(f = File.join(path, fn))
      return f
    end
  end
  return nil
end

#source_file(path) ⇒ Object

Loads a given file in the current session and displays the source lines

See Irb#suspend_input_method for more information.


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# File 'lib/irb/ext/loader.rb', line 51

def source_file(path)
  irb.suspend_name(path, File.basename(path)) do
    irb.suspend_input_method(FileInputMethod.new(path)) do
      |back_io|
      irb.signal_status(:IN_LOAD) do
        if back_io.kind_of?(FileInputMethod)
          irb.eval_input
        else
          begin
            irb.eval_input
          rescue LoadAbort
            print "load abort!!\n"
          end
        end
      end
    end
  end
end