Rakefile in metatron-0.4.2 vs Rakefile in metatron-0.5.0

@@ -14,6 +14,38 @@
 desc "allows running a demo controller"
 task :demo do
   system("rackup --host 0.0.0.0 -P #{File.expand_path(".")}/tmp/daemon.pid")
 end
 
+desc "automatically bump the gem's version"
+task :bump, [:type] do |_t, args|
+  type = args[:type] || ENV["TYPE"] || "patch"
+  current_version = Metatron::VERSION
+  new_version = calculate_new_version(type)
+  puts "Bumping gem version from #{current_version} to #{new_version}"
+  update_version(new_version)
+end
+
 task default: %i[spec rubocop yard]
+
+def calculate_new_version(type)
+  version = Metatron::VERSION.split(".").map(&:to_i)
+  case type
+  when "patch"
+    version[2] += 1
+  when "minor"
+    version[1] += 1
+    version[2] = 0
+  when "major"
+    version[0] += 1
+    version[1] = 0
+    version[2] = 0
+  end
+
+  version.join(".")
+end
+
+def update_version(new_version)
+  file = File.read("lib/metatron/version.rb")
+  new_contents = file.gsub(/VERSION = "(.+)"/, %(VERSION = "#{new_version}"))
+  File.write("lib/metatron/version.rb", new_contents)
+end