class Jekyll::GitHubMetadata::Value

def call_or_value

or returns the raw value if it's a literal
Calls the value Proc with the appropriate number of arguments 
def call_or_value
  return value unless value.respond_to?(:call)
  case value.arity
  when 0
    value.call
  when 1
    value.call(GitHubMetadata.client)
  when 2
    value.call(GitHubMetadata.client, GitHubMetadata.repository)
  else
    raise ArgumentError, "Whoa, arity of 0, 1, or 2 please in your procs."
  end
end

def initialize(*args) 

def initialize(*args)
  case args.size
  when 1
    @key = "{anonymous}"
    @value = args.first
  when 2
    @key = args.first.to_s
    @value = args.last
  else
    raise ArgumentError, "#{args.size} args given but expected 1 or 2"
  end
end

def render 

def render
  return @rendered if defined? @rendered
  @rendered = @value = Sanitizer.sanitize(call_or_value)
rescue RuntimeError, NameError => e
  Jekyll::GitHubMetadata.log :error, "Error processing value '#{key}':"
  raise e
end

def to_liquid 

def to_liquid
  case render
  when nil, true, false, Hash, String, Numeric, Array
    value
  else
    to_json
  end
end