1 files changed, 23 insertions, 22 deletions
diff --git a/ext/digest/digest.gemspec b/ext/digest/digest.gemspec
index 8665e42e0f..4a01c5fde1 100644
--- a/ext/digest/digest.gemspec
+++ b/ext/digest/digest.gemspec
@@ -2,8 +2,13 @@
 # frozen_string_literal: true
 
 Gem::Specification.new do |spec|
+  version_module = Module.new do
+    version_rb = File.join(__dir__, "lib/digest/version.rb")
+    module_eval(File.read(version_rb), version_rb)
+  end
+
   spec.name          = "digest"
-  spec.version       = "3.0.1.pre"
+  spec.version       = version_module::Digest::VERSION
   spec.authors       = ["Akinori MUSHA"]
   spec.email         = ["knu@idaemons.org"]
 
@@ -12,32 +17,28 @@ Gem::Specification.new do |spec|
   spec.homepage      = "https://github.com/ruby/digest"
   spec.licenses      = ["Ruby", "BSD-2-Clause"]
 
-  spec.files         = [
-    "LICENSE.txt", "README.md",
-    "ext/digest/bubblebabble/bubblebabble.c", "ext/digest/bubblebabble/extconf.rb", "ext/digest/defs.h",
-    "ext/digest/digest.c", "ext/digest/digest.h", "ext/digest/digest_conf.rb", "ext/digest/extconf.rb",
-    "ext/digest/md5/extconf.rb", "ext/digest/md5/md5.c", "ext/digest/md5/md5.h", "ext/digest/md5/md5cc.h",
-    "ext/digest/md5/md5init.c", "ext/digest/rmd160/extconf.rb", "ext/digest/rmd160/rmd160.c",
-    "ext/digest/rmd160/rmd160.h", "ext/digest/rmd160/rmd160init.c", "ext/digest/sha1/extconf.rb",
-    "ext/digest/sha1/sha1.c", "ext/digest/sha1/sha1.h", "ext/digest/sha1/sha1cc.h",
-    "ext/digest/sha1/sha1init.c", "ext/digest/sha2/extconf.rb", "ext/digest/sha2/lib/sha2.rb",
-    "ext/digest/sha2/sha2.c", "ext/digest/sha2/sha2.h", "ext/digest/sha2/sha2cc.h",
-    "ext/digest/sha2/sha2init.c", "ext/digest/test.sh", "ext/openssl/deprecation.rb",
-    "lib/digest.rb"
+  spec.files = [
+    "LICENSE.txt",
+    "README.md",
+    *Dir["lib/digest{.rb,/**/*.rb}"],
   ]
 
   spec.required_ruby_version = ">= 2.5.0"
 
   spec.bindir        = "exe"
   spec.executables   = []
-  spec.require_paths = ["lib"]
-  spec.extensions    = %w[
-    ext/digest/extconf.rb
-    ext/digest/bubblebabble/extconf.rb
-    ext/digest/md5/extconf.rb
-    ext/digest/rmd160/extconf.rb
-    ext/digest/sha1/extconf.rb
-    ext/digest/sha2/extconf.rb
-  ]
+
+  if Gem::Platform === spec.platform and spec.platform =~ 'java' or RUBY_ENGINE == 'jruby'
+    spec.platform = 'java'
+
+    spec.files += Dir["ext/java/**/*.{rb,java}", "lib/digest.jar"]
+    spec.require_paths = %w[lib ext/java/org/jruby/ext/digest/lib]
+  else
+    spec.extensions = Dir["ext/digest/**/extconf.rb"]
+
+    spec.files += Dir["ext/digest/**/{*.{rb,c,h,sh},depend}"]
+    spec.require_paths = %w[lib]
+  end
+
   spec.metadata["msys2_mingw_dependencies"] = "openssl"
 end