Sha256: 40474ea501ca70aa0ae96d640ed01ad1968bdc55c69e38f3df658916c705251f
Contents?: true
Size: 1.56 KB
Versions: 16
Compression:
Stored size: 1.56 KB
Contents
module JsDuck
module Options
# Stores values of command line options.
#
# All options are initially defined with an #attribute method, which
# ensures that accessing an unexisting option will result in an
# error.
class Record
def initialize
@validators = {}
end
# Defines accessor for an option,
# and assigns a default value for it.
def attribute(name, default=nil)
instance_variable_set("@#{name}", default)
# Use `send` to invoke private attr_accessor method. As we only
# expect a single OptionsRecord to exist for the lifetime of the
# app, it should be safe to define a method on a class.
self.class.send(:attr_accessor, name)
end
# Defines a validator function that gets run after all the
# options have been parsed. When validation fails, the function
# should return an error message string (or an array of string
# for multi-line error message) otherwise nil, to signify
# success.
def validator(name, &block)
@validators[name] = block
end
# Runs all the validators. Returns an error message string from
# the first failed validation or nil when everything is OK.
#
# Alternatively runs just one validator by name. Used in testing.
def validate!(name=nil)
validators = name ? [@validators[name]] : @validators.values
validators.each do |block|
if err = block.call()
return err
end
end
return nil
end
end
end
end
Version data entries
16 entries across 16 versions & 3 rubygems