Add version:update task

Author: kou

Rakefile

@@ -8,3 +8,27 @@ task :tag do
   sh("git", "tag", "-a", version, "-m", "#{version} has been released!!!")
   sh("git", "push", "--tags")
 end
+
+namespace :version do
+  desc "Update version"
+  task :update do
+    new_version = ENV["VERSION"]
+    if new_version.nil?
+      raise "Specify new version as VERSION environment variable value"
+    end
+
+    xmlua_lua_content = File.read("xmlua.lua").gsub(/xmlua\.VERSION = ".+?"/) do
+      "xmlua.VERSION = \"#{new_version}\""
+    end
+    File.open("xmlua.lua", "w") do |xmlua_lua|
+      xmlua_lua.print(xmlua_lua_content)
+    end
+
+    rockspec_content = File.read("xmlua.rockspec").gsub(/package_version = ".+?"/) do
+      "package_version = \"#{new_version}\""
+    end
+    File.open("xmlua.rockspec", "w") do |rockspec|
+      rockspec.print(rockspec_content)
+    end
+  end
+end