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Contents
# frozen_string_literal: true
module EacRubyUtils
class FilesystemCache
CONTENT_FILE_NAME = '__content__'
attr_reader :path
def initialize(*path_parts)
raise ArgumentError, "\"#{path_parts}\" is empty" if path_parts.empty?
@path = ::File.expand_path(::File.join(*path_parts.map(&:to_s)))
end
def clear
return unless cached?
::File.unlink(content_path)
end
def read
return nil unless cached?
::File.read(content_path)
end
def read_or_cache
write(yield) unless cached?
read
end
def write(value)
assert_directory_on_path
::File.write(content_path, value)
value
end
def child(*child_path_parts)
self.class.new(path, *child_path_parts)
end
def cached?
::File.exist?(content_path)
end
def content_path
::File.join(path, CONTENT_FILE_NAME)
end
private
def assert_directory_on_path
raise "#{path} is a file" if ::File.file?(path)
::FileUtils.mkdir_p(path)
end
end
end
Version data entries
40 entries across 40 versions & 3 rubygems