Generate ANSI escape sequences.

ansicolor

#!/usr/bin/env ruby -w
# Usage: ansicolor attr... [-- string...]
# Generate ANSI escape sequences.
# With string arguments, print them on stdout,
# followed by a `clear' escape sequence.

begin
  require 'term/ansicolor'
rescue LoadError
  require 'rubygems'
  require 'term/ansicolor'
end

def run(attrs, echos = nil)
  begin
    out = attrs.collect { |a| Term::ANSIColor.send a.to_sym }
    out << echos.join(" ") << Term::ANSIColor.clear << "\n" if echos
    print out
  rescue NoMethodError => err
    puts "#{File.basename($PROGRAM_NAME)}: undefined attribute '#{err.name}'"
  end
end

idx = ARGV.index '--'
if idx
  ARGV.delete_at idx
  run(ARGV[0...idx], ARGV[idx..-1])
else
  run(ARGV.to_a)
end