zlib: fix Zlib::VERSION

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/zlib/zlib.c

@@ -25,7 +25,7 @@
 # define VALGRIND_MAKE_MEM_UNDEFINED(p, n) 0
 #endif
 
-#define RUBY_ZLIB_VERSION  "0.6.0"
+#define RUBY_ZLIB_VERSION "1.0.0"
 
 #ifndef GZIP_SUPPORT
 #define GZIP_SUPPORT  1

ext/zlib/zlib.gemspec

@@ -1,8 +1,12 @@
 # coding: utf-8
 # frozen_string_literal: true
+source_version = File.open(File.join(__dir__, "zlib.c")) {|f|
+  f.gets("\n#define RUBY_ZLIB_VERSION ")
+  f.gets[/\s*(".+")/, 1].undump
+}
 Gem::Specification.new do |spec|
   spec.name          = "zlib"
-  spec.version       = "1.0.0"
+  spec.version       = source_version
   spec.authors       = ["Yukihiro Matsumoto", "UENO Katsuhiro"]
   spec.email         = ["matz@ruby-lang.org", nil]