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Contents
module Ridley::Mixin
module FromFile
module ClassMethods
def from_file(filename, *args)
new(*args).from_file(filename)
end
def class_from_file(filename, *args)
new(*args).class_from_file(filename)
end
end
class << self
def included(base)
base.extend(ClassMethods)
end
end
# Loads the contents of a file within the context of the current object
#
# @param [#to_s] filename
# path to the file to load
#
# @raise [IOError] if the file does not exist or cannot be read
def from_file(filename)
filename = filename.to_s
ensure_presence!(filename)
with_error_handling(filename) do
self.instance_eval(IO.read(filename), filename, 1)
self
end
end
# Loads the contents of a file within the context of the current object's class
#
# @param [#to_s] filename
# path to the file to load
#
# @raise [IOError] if the file does not exist or cannot be read
def class_from_file(filename)
filename = filename.to_s
ensure_presence!(filename)
with_error_handling(filename) do
self.class_eval(IO.read(filename), filename, 1)
self
end
end
private
# Ensure the given filename and path is readable
#
# @param [String] filename
#
# @raise [IOError]
# if the target file does not exist or is not readable
def ensure_presence!(filename)
unless File.exists?(filename) && File.readable?(filename)
raise IOError, "Could not open or read: '#{filename}'"
end
end
# Execute the given block, handling any exceptions that occur
#
# @param [String] filename
#
# @raise [Ridley::Errors::FromFileParserError]
# if any exceptions if raised
def with_error_handling(filename)
yield
rescue => e
raise Ridley::Errors::FromFileParserError.new(filename, e)
end
end
end
Version data entries
22 entries across 22 versions & 1 rubygems