[ruby/resolv] Expose Resolv::VERSION

https://github.com/ruby/resolv/commit/6ab2385e89

lib/resolv.gemspec

@@ -1,6 +1,13 @@
+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          = "resolv"
-  spec.version       = "0.2.2"
+  spec.name          = name
+  spec.version       = version
   spec.authors       = ["Tanaka Akira"]
   spec.email         = ["akr@fsij.org"]
 

lib/resolv.rb

@@ -37,6 +37,8 @@ end
 
 class Resolv
 
+  VERSION = "0.2.2"
+
   ##
   # Looks up the first IP address for +name+.