prettyprint.gemspec in prettyprint-0.1.1 vs prettyprint.gemspec in prettyprint-0.2.0

@@ -1,7 +1,14 @@
+name = File.basename(__FILE__, ".gemspec")
+version = ["lib", Array.new(name.count("-")+1).join("/")].find do |dir|
+  break File.foreach(File.join(__dir__, dir, "#{name.tr('-', '/')}.rb")) do |line|
+    /^\s*VERSION\s*=\s*"(.*)"/ =~ line and break $1
+  end rescue nil
+end
+
 Gem::Specification.new do |spec|
-  spec.name          = "prettyprint"
-  spec.version       = "0.1.1"
+  spec.name          = name
+  spec.version       = version
   spec.authors       = ["Tanaka Akira"]
   spec.email         = ["[e-mail]"]
 
   spec.summary       = %q{Implements a pretty printing algorithm for readable structure.}
   spec.description   = %q{Implements a pretty printing algorithm for readable structure.}