JSON pretty-printer. Not sophisticated.

jsonpp

#! /usr/bin/env ruby

require 'json'
require 'pp'

mode = :ruby

ARGV.each_with_index { |arg, i|
	next unless arg.start_with? ?-

	ARGV.delete_at i
	case arg
	when '-j'
		mode = :json
	when '-r'
		mode = :ruby
	when '--'
		break
	else
		$stderr.puts "Un-understood option:  #{arg}"
		break
	end
}

content = ARGF.read

parsed =
	begin
		JSON.parse content
	rescue JSON::ParserError => e
		$stderr.puts e.inspect
		mode = :nop
		content
	end

case mode
when :nop
	print parsed
when :ruby
	pp parsed
when :json
	puts JSON.pretty_unparse(parsed)
end