Pretty Print JSON

pjson

#!/usr/bin/env ruby

# Pretty print json
#
# Reads JSON from file(s) or from STDIN
#
# Usage:
#
#     cat my_json.json | pjson
#     pjson my_json.json
#     pjson file1.json file2.json
#

require 'json'

jsons = ARGV.map do |file|
  begin
    File.read(file)
  rescue
    puts "Cannot read file: #{file}"
  end
end

jsons << STDIN.read unless STDIN.tty?
jsons.compact!

jsons.each do |json|
  begin
    puts JSON.pretty_generate JSON.parse(json)
  rescue JSON::ParserError => e
    puts "Not valid JSON"
  end
end