tsv_to_yml.rb

require 'yaml'

lines = File.read(ARGV[0]).split("\n")
header = lines[0].split("\t")
lines.delete(lines[0])

hashes = []
lines.each do |line|
  values = line.split("\t")
  hash = Hash.new {}
  header.each_index do |index|
    hash[header[index]] = values[index]
  end
  hashes << hash
end

hashes = hashes.to_yaml

File.write(ARGV[1], hashes, mode: 'w')