A script that converts a YAML skills file into a TSV file. Take two parameters from command line: the name of input and output file(optional). Prints the output in the command-line if output filename is not provided.

yml_to_tsv.rb

require 'yaml'

data_filename = ARGV[0]
output_filename = ARGV[1]

def yml_to_tsv(data)
  headers = data[0].keys
  header_line = ''
  new_data = []

  headers.map! { |header| header_line.concat(header, "\t") }
  new_data.push(header_line).push("\n")

  data.each do |set|
    set.each_value { |val| new_data.push(val + "\t") }
    new_data.push("\n")
  end

  new_data
end

yaml_data = YAML.safe_load(File.read(data_filename))
tsv_data = yml_to_tsv(yaml_data)

if output_filename
  File.open(output_filename, 'w') { |file| file.puts tsv_data.join('') }
end

print tsv_data.join('') unless output_filename