Merge pull request #29 from evanthegrayt/task-for-bumping-version

Add rake tasks for bumping gem version

Rakefile

@@ -19,3 +19,48 @@ RDoc::Task.new do |rdoc|
 end
 
 task default: :test
+
+namespace :version do
+  desc "Print the current version from the version.rb file"
+  task :current do
+    puts Attribool::VERSION
+  end
+
+  namespace :increment do
+    desc "Increment the version's PATCH level"
+    task :patch do
+      File.join(__dir__, "lib", "attribool", "version.rb").then do |version_file|
+        File.write(
+          version_file,
+          File.read(version_file).sub(/(PATCH\s=\s)(\d+)/) { "#{$1}#{$2.next}" }
+        )
+      end
+      system("bundle lock")
+    end
+    desc "Increment the version's MINOR level"
+    task :minor do
+      File.join(__dir__, "lib", "attribool", "version.rb").then do |version_file|
+        File.write(
+          version_file,
+          File.read(version_file)
+            .sub(/(PATCH\s=\s)(\d+)/) { "#{$1}0" }
+            .sub(/(MINOR\s=\s)(\d+)/) { "#{$1}#{$2.next}" }
+        )
+      end
+      system("bundle lock")
+    end
+    desc "Increment the version's MAJOR level"
+    task :major do
+      File.join(__dir__, "lib", "attribool", "version.rb").then do |version_file|
+        File.write(
+          version_file,
+          File.read(version_file)
+            .sub(/(PATCH\s=\s)(\d+)/) { "#{$1}0" }
+            .sub(/(MINOR\s=\s)(\d+)/) { "#{$1}0" }
+            .sub(/(MAJOR\s=\s)(\d+)/) { "#{$1}#{$2.next}" }
+        )
+      end
+      system("bundle lock")
+    end
+  end
+end