Class: Rbkb::Cli::Hexify

Inherits:
Executable show all
Defined in:
lib/rbkb/cli/hexify.rb

Overview

Copyright 2009 emonti at matasano.com See README.rdoc for license information

The hexify command converts a string or raw data to hex characters. Input can be supplied via stdin, a string argument, or a file (with -f).

Instance Attribute Summary

Attributes inherited from Executable

#argv, #exit_status, #oparse, #opts, #stderr, #stdin, #stdout

Instance Method Summary collapse

Methods inherited from Executable

#bail, #bail_args, #exit, #initialize, run

Constructor Details

This class inherits a constructor from Rbkb::Cli::Executable

Instance Method Details

#go(*args) ⇒ Object 



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# File 'lib/rbkb/cli/hexify.rb', line 47

def go(*args)
  super(*args)

  # Default to standard input
  @opts[:indat] ||= @stdin.read

  indat = @opts.delete(:indat)
  len = @opts.delete(:len) || indat.length

  bail('Length must be greater than zero') unless len > 0

  until (m = indat.slice!(0..len - 1)).empty?
    @stdout << m.hexify(@opts)
    @stdout.puts((opts[:delim] and !indat.empty?) ? opts[:delim] : "\n")
  end
  self.exit(0)
end

#make_parser ⇒ Object 



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# File 'lib/rbkb/cli/hexify.rb', line 9

def make_parser
  super()
  add_std_file_opt(:indat)
  arg = @oparse

  # Add local options
  arg.banner += ' <data | blank for stdin>'

  arg.on('-l', '--length LEN', Numeric, 'Output lines of LEN bytes') do |l|
    @opts[:len] = l
  end

  arg.on('-d', '--delim=DELIMITER', 'DELIMITER between each byte') do |d|
    @opts[:delim] = d
  end

  arg.on('-p', '--prefix=PREFIX', 'PREFIX before each byte') do |p|
    @opts[:prefix] = p
  end

  arg.on('-s', '--suffix=SUFFIX', 'SUFFIX after each byte') do |s|
    @opts[:suffix] = s
  end
end

#parse(*args) ⇒ Object 



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# File 'lib/rbkb/cli/hexify.rb', line 34

def parse(*args)
  super(*args)

  # blackbag-style space delimiter compatability
  if @argv[0] == '+' and @opts[:delim].nil?
    @opts[:delim] = ' '
    @argv.shift
  end

  parse_string_argument(:indat)
  parse_catchall
end