Add initial gemspec for building rdoc

Author: Zachary Scott

rdoc.gemspec

@@ -0,0 +1,64 @@
+# -*- encoding: utf-8 -*-
+require_relative 'lib/rdoc'
+
+Gem::Specification.new do |s|
+  s.name = "rdoc"
+  s.version = RDoc::VERSION
+
+  s.required_rubygems_version = Gem::Requirement.new(">= 1.3") if
+    s.respond_to? :required_rubygems_version=
+
+  s.require_paths = ["lib"]
+  s.authors = [
+    "Eric Hodel",
+    "Dave Thomas",
+    "Phil Hagelberg",
+    "Tony Strauss",
+    "Zachary Scott"
+  ]
+
+  s.description = <<-DESCRIPTION
+RDoc produces HTML and command-line documentation for Ruby projects.
+RDoc includes the +rdoc+ and +ri+ tools for generating and displaying documentation from the command-line.
+  DESCRIPTION
+
+  s.email = ["[email protected]", "[email protected]"]
+
+  s.executables = ["rdoc", "ri"]
+
+  s.extra_rdoc_files += %w[
+    CVE-2013-0256.rdoc
+    CONTRIBUTING.rdoc
+    ExampleMarkdown.md
+    ExampleRDoc.rdoc
+    History.rdoc
+    LEGAL.rdoc
+    LICENSE.rdoc
+    README.rdoc
+    RI.rdoc
+    TODO.rdoc
+  ]
+
+  s.files = File.readlines("Manifest.txt").map { |l| l.gsub("\n",'') }
+
+  s.homepage = "http://docs.seattlerb.org/rdoc"
+  s.licenses = ["Ruby"]
+  s.post_install_message = <<-MESSAGE
+Depending on your version of ruby, you may need to install ruby rdoc/ri data:
+
+<= 1.8.6 : unsupported
+ = 1.8.7 : gem install rdoc-data; rdoc-data --install
+ = 1.9.1 : gem install rdoc-data; rdoc-data --install
+>= 1.9.2 : nothing to do! Yay!
+  MESSAGE
+
+  s.rdoc_options = ["--main", "README.rdoc"]
+  s.required_ruby_version = Gem::Requirement.new(">= 1.8.7")
+  s.rubygems_version = "2.5.2"
+  s.summary = "RDoc produces HTML and command-line documentation for Ruby projects"
+
+  s.add_runtime_dependency("json", "~> 1.4")
+  s.add_development_dependency("racc", "~> 1.4", "> 1.4.10")
+  s.add_development_dependency("kpeg", "~> 0.9")
+  s.add_development_dependency("minitest", "~> 4")
+end