Module: Bond::Readline

Defined in:
lib/bond/readline.rb

Overview

This is the default readline plugin for Bond. A valid plugin must define methods setup() and line_buffer(). setup() should load the readline-like library and set the completion_proc. line_buffer() should give access to the full line of what the user has typed.

Constant Summary collapse

DefaultBreakCharacters = 
" \t\n\"\\'`><=;|&{("

Instance Method Summary collapse

Instance Method Details

#line_buffer ⇒ Object 



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# File 'lib/bond/readline.rb', line 43

def line_buffer
  ::Readline.line_buffer
end

#setup ⇒ Object 



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# File 'lib/bond/readline.rb', line 9

def setup
  require 'readline'
  begin
    require 'readline_line_buffer'
  rescue LoadError
    $stderr.puts "Failed to load readline_line_buffer extension. Falling back on RubyInline extension."
    require 'inline'
    eval %[
      module ::Readline
        inline do |builder|
          %w(<errno.h> <stdio.h> <readline/readline.h>).each{|h| builder.include h }
          builder.c_raw_singleton <<-EOC
      static VALUE line_buffer(VALUE self)
      {
        rb_secure(4);
        if (rl_line_buffer == NULL)
      return Qnil;
        return rb_tainted_str_new2(rl_line_buffer);
      }
      EOC
        end
      end
    ]
  end

  # Reinforcing irb defaults
  ::Readline.completion_append_character = nil
  if ::Readline.respond_to?("basic_word_break_characters=")
    ::Readline.basic_word_break_characters = DefaultBreakCharacters
  end

  ::Readline.completion_proc = self
end