module Gem::YAMLSerializer - Documentation for Ruby 4.0
Description: module Gem::YAMLSerializer: A stub yaml serializer that can handle only hashes and strings (as of now).
Keywords: ruby,module,Gem::YAMLSerializer

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# module Gem::YAMLSerializer

A stub yaml serializer that can handle only hashes and strings (as of now).

### Constants

ARRAY_REGEX
HASH_REGEX

### Public Instance Methods

dump (hash)
Source

    # File lib/rubygems/yaml_serializer.rb, line 8
    def dump(hash)
      yaml = String.new("---")
      yaml << dump_hash(hash)
    end

dump_hash (hash)
Source

    # File lib/rubygems/yaml_serializer.rb, line 13
    def dump_hash(hash)
      yaml = String.new("\n")
      hash.each do |k, v|
        yaml << k << ":"
        if v.is_a?(Hash)
          yaml << dump_hash(v).gsub(/^(?!$)/, "  ") # indent all non-empty lines
        elsif v.is_a?(Array) # Expected to be array of strings
          if v.empty?
            yaml << " []\n"
          else
            yaml << "\n- " << v.map {|s| s.to_s.gsub(/\s+/, " ").inspect }.join("\n- ") << "\n"
          end
        else
          yaml << " " << v.to_s.gsub(/\s+/, " ").inspect << "\n"
        end
      end
      yaml
    end

load (str)
Source

    # File lib/rubygems/yaml_serializer.rb, line 53
    def load(str)
      res = {}
      stack = [res]
      last_hash = nil
      last_empty_key = nil
      str.split(/\r?\n/) do |line|
        if match = HASH_REGEX.match(line)
          indent, key, quote, val = match.captures
          val = strip_comment(val)

          depth = indent.size / 2
          if quote.empty? && val.empty?
            new_hash = {}
            stack[depth][key] = new_hash
            stack[depth + 1] = new_hash
            last_empty_key = key
            last_hash = stack[depth]
          else
            val = [] if val == "[]" # empty array
            stack[depth][key] = val
          end
        elsif match = ARRAY_REGEX.match(line)
          _, val = match.captures
          val = strip_comment(val)

          last_hash[last_empty_key] = [] unless last_hash[last_empty_key].is_a?(Array)

          last_hash[last_empty_key].push(val)
        end
      end
      res
    end

strip_comment (val)
Source

    # File lib/rubygems/yaml_serializer.rb, line 86
    def strip_comment(val)
      if val.include?("#") && !val.start_with?("#")
        val.split("#", 2).first.strip
      else
        val
      end
    end