Add bin and edit workflow

bin/gems/fiber-annotation-0.2.0/lib/fiber/annotation.rb

@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+# Released under the MIT License.
+# Copyright, 2023, by Samuel Williams.
+
+require 'fiber'
+
+class Fiber
+	# A mechanism for annotating fibers.
+	module Annotation
+		# Annotate the current fiber with the given annotation.
+		# @parameter annotation [Object] The annotation to set.
+		def initialize(annotation: nil, **options, &block)
+			@annotation = annotation
+			super(**options, &block)
+		end
+		
+		# Get the current annotation.
+		# @returns [Object] The current annotation.
+		attr_accessor :annotation
+		
+		# Annotate the current fiber with the given annotation.
+		#
+		# If a block is given, the annotation is set for the duration of the block and then restored to the previous value.
+		#
+		# The block form of this method should only be invoked on the current fiber.
+		#
+		# @parameter annotation [Object] The annotation to set.
+		# @yields {} The block to execute with the given annotation.
+		# @returns [Object] The return value of the block.
+		def annotate(annotation)
+			if block_given?
+				raise "Cannot annotation a different fiber!" unless Fiber.current == self
+				
+				begin
+					current_annotation = @annotation
+					@annotation = annotation
+					return yield
+				ensure
+					@annotation = current_annotation
+				end
+			else
+				@annotation = annotation
+			end
+		end
+	end
+end
+
+unless Fiber.method_defined?(:annotation)
+	Fiber.prepend(Fiber::Annotation)
+	
+	# @scope Fiber
+	# @name self.annotate
+	# Annotate the current fiber with the given annotation.
+	def Fiber.annotate(...)
+		Fiber.current.annotate(...)
+	end
+end