lib/io_streams/utils.rb in iostreams-0.20.3 vs lib/io_streams/utils.rb in iostreams-1.0.0.beta

@@ -1,14 +1,36 @@
 module IOStreams
   module Utils
+    # Lazy load dependent gem so that it remains a soft dependency.
+    def self.load_dependency(gem_name, stream_type, require_name = gem_name)
+      require require_name
+    rescue LoadError => e
+      raise(LoadError, "Please install the gem '#{gem_name}' to support #{stream_type}. #{e.message}")
+    end
+
     # Helper method: Returns [true|false] if a value is blank?
     def self.blank?(value)
       if value.nil?
         true
       elsif value.is_a?(String)
         value !~ /\S/
       else
         value.respond_to?(:empty?) ? value.empty? : !value
       end
+    end
+
+    # Yields the path to a temporary file_name.
+    #
+    # File is deleted upon completion if present.
+    def self.temp_file_name(basename, extension = '')
+      result = nil
+      ::Dir::Tmpname.create([basename, extension]) do |tmpname|
+        begin
+          result = yield(tmpname)
+        ensure
+          ::File.unlink(tmpname) if ::File.exist?(tmpname)
+        end
+      end
+      result
     end
   end
 end