Outputs the full key of the current line in a Rails I18n YAML file and copies it to the clipboard. 🎉

full_key_from_rails_i18n_yaml.rb

#!/usr/bin/env ruby18 -wKU

def key_part(line)
  match = line.match(/^\s*([^:]+)/)
  return unless match
  match.captures.first
end

def leading_spaces(line)
  line.match(/^(\s*)\S?/).captures.first.length
end

cursor_line = ENV['TM_LINE_NUMBER'].to_i

content = File.read(ENV['TM_FILEPATH'])
lines = content.split("\n")

i = cursor_line
spaces = leading_spaces(lines[i])
key_parts = [key_part(lines[i])]

while spaces > 0
  new_spaces = spaces - 2
  
  while i >= 0 && leading_spaces(lines[i]) > new_spaces
    i -= 1
  end
  key_parts.unshift(key_part(lines[i]))
  spaces = new_spaces
end

full_key = key_parts.compact.join('.')

`echo '#{full_key}' | pbcopy`

puts full_key