yml_to_json.rake

# run:
# rake file:convert:to_json[path/to/file.yml]

namespace :file do
  namespace :convert do
    desc "convert yml file to json"
    task :to_json, [:file_path] do |task, args|
      puts 'File path:'
      file_path = args[:file_path]
      puts file_path
      puts '='*10

      puts 'Check file present...'
      raise 'File not exist' unless File.file?(file_path)
      puts 'Success'

      file_name, ext = file_path.split('/').last.split('.')
      puts 'Check extension...'
      raise 'Only *.yml file supported' unless is_yml?(ext)
      puts 'Success'

      puts "Convert file to json..."
      hash = YAML.load_file(file_path)
      File.open("#{file_name}.json", 'w') { |f| f << JSON.pretty_generate(hash) }
      puts 'Done!'
    end

    def is_yml?(ext)
      ['yml', 'yaml'].include? ext
    end
  end
end