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Contents
module Sprout
module Executable
##
# Concrete Sprout::Executable::Param object for File values.
#
# This class is used in Sprout::Excecutable s with:
#
# add_param :some_name, File
#
# This parameter is truly special in that whatever values
# are sent to the File parameter will be added to the underlying
# Rake task as prerequisites and must exist before +Sprout::Executable.execute+
# is called - _unless_ the parameter value
# matches the Sprout::Executable instance's +output+ value.
#
# Of course this will only be the case if there is a Rake
# task wrapper for the Executable, if the Sprout::Executable
# is being used to create a Ruby executable, then these File
# parameters will only be validated before execution.
#
# @see Sprout::Executable::Param
#
class FileParam < Param
attr_accessor :file_task_name
def initialize
super
@option_parser_type_name = 'FILE'
end
def shell_value
clean_path value
end
def prepare_prerequisites
if file_task_name
self.value ||= belongs_to.rake_task_name
return
end
if prerequisite?(value)
file value
belongs_to.prerequisites << value
end
end
def validate
super
if(!file_task_name && !value.nil? && !File.exists?(value))
raise Sprout::Errors::InvalidArgumentError.new "No such file or directory - #{value}"
end
end
private
def prerequisite?(file)
file && !file_is_output?(file)
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems