a converter from LTSV to JSON.

ltsv2json.rb

#!/usr/bin/env ruby

require 'optparse'
require 'json'

options = {}
OptionParser.new do |opts|
  opts.banner = "Usage: ltsv2json.rb [options]"

  opts.on("-f", "--format FORMAT", "Select format.") do |v|
    options[:format] = v
  end
end.parse!

while gets
  record = Hash[$_.split("\t").map{|f| f.split(":", 2)}]
  case options[:format]
  when 'ltsv'
    puts $_
  when 'ssv'
    puts record.values.join(' ')
  else
    puts record.to_json
  end
end