Adding comment to YAML programmatically

Question

Given the simple YAML file for localisation:

root:
  label: \'Test\'
  account: \'Account\'
  add: \'Add\'
  local_folder: \'Local folder\'
  remote_folder: \'Re         


        

Answer 1

require 'yaml'

str = <<-eol
root:
  label: 'Test'
  account: 'Account'
  add: 'Add'
  local_folder: 'Local folder'
  remote_folder: 'Remote folder'
  status: 'Status'
  subkey: 'Some value'
eol

h = YAML.load(str)
h["root"]["local_folder"] = h["root"]["local_folder"] + " !Test comment"
h["root"]["subkey"] = h["root"]["subkey"] + " !Test comment"

puts h.to_yaml 

# >> ---
# >> root:
# >>   label: Test
# >>   account: Account
# >>   add: Add
# >>   local_folder: Local folder !Test comment
# >>   remote_folder: Remote folder
# >>   status: Status
# >>   subkey: Some value !Test comment

EDIT

more programmatically:

require 'yaml'

str = <<-eol
root:
  label: 'Test'
  account: 'Account'
  add: 'Add'
  local_folder: 'Local folder'
  remote_folder: 'Remote folder'
  status: 'Status'
  subkey: 'Some value'
eol

h = YAML.load(str)
%w(local_folder subkey).each {|i| h["root"][i] = h["root"][i] + " !Test comment" }

puts h.to_yaml 

# >> ---
# >> root:
# >>   label: Test
# >>   account: Account
# >>   add: Add
# >>   local_folder: Local folder !Test comment
# >>   remote_folder: Remote folder
# >>   status: Status
# >>   subkey: Some value !Test comment