Use the new pure-Ruby gemspec from Ore 0.8.0.

open_namespace.gemspec

@@ -1,15 +1,127 @@
-# -*- encoding: utf-8 -*-
-
-begin
-  Ore::Specification.new do |gemspec|
-    # custom logic here
-  end
-rescue NameError
-  begin
-    require 'ore/specification'
-    retry
-  rescue LoadError
-    STDERR.puts "The 'open_namespace.gemspec' file requires Ore."
-    STDERR.puts "Run `gem install ore-core` to install Ore."
+# encoding: utf-8
+
+require 'yaml'
+
+Gem::Specification.new do |gemspec|
+  files = if File.directory?('.git')
+            `git ls-files`.split($/)
+          elsif File.directory?('.hg')
+            `hg manifest`.split($/)
+          elsif File.directory?('.svn')
+            `svn ls -R`.split($/).select { |path| File.file?(path) }
+          else
+            Dir['{**/}{.*,*}'].select { |path| File.file?(path) }
+          end
+
+  filter_files = lambda { |paths|
+    case paths
+    when Array
+      (files & paths)
+    when String
+      (files & Dir[paths])
+    end
+  }
+
+  version = {
+    :file => 'lib/open_namespace/version.rb',
+    :constant => 'OpenNamespace::VERSION'
+  }
+
+  defaults = {
+    'name' => File.basename(File.dirname(__FILE__)),
+    'files' => files,
+    'executables' => filter_files['bin/*'].map { |path| File.basename(path) },
+    'test_files' => filter_files['{test/{**/}*_test.rb,spec/{**/}*_spec.rb}'],
+    'extra_doc_files' => filter_files['*.{txt,rdoc,md,markdown,tt,textile}'],
+  }
+
+  metadata = defaults.merge(YAML.load_file('gemspec.yml'))
+
+  gemspec.name = metadata.fetch('name',defaults[:name])
+  gemspec.version = if metadata['version']
+                      metadata['version']
+                    elsif File.file?(version[:file])
+                      require File.join('.',version[:file])
+                      eval(version[:constant])
+                    end
+
+  gemspec.summary = metadata.fetch('summary',metadata['description'])
+  gemspec.description = metadata.fetch('description',metadata['summary'])
+
+  case metadata['license']
+  when Array
+    gemspec.licenses = metadata['license']
+  when String
+    gemspec.license = metadata['license']
+  end
+
+  case metadata['authors']
+  when Array
+    gemspec.authors = metadata['authors']
+  when String
+    gemspec.author = metadata['authors']
+  end
+
+  gemspec.email = metadata['email']
+  gemspec.homepage = metadata['homepage']
+
+  case metadata['require_paths']
+  when Array
+    gemspec.require_paths = metadata['require_paths']
+  when String
+    gemspec.require_path = metadata['require_paths']
+  end
+
+  gemspec.files = filter_files[metadata['files']]
+
+  gemspec.executables = metadata['executables']
+  gemspec.extensions = metadata['extensions']
+
+  if Gem::VERSION < '1.7.'
+    gemspec.default_executable = gemspec.executables.first
+  end
+
+  gemspec.test_files = filter_files[metadata['test_files']]
+
+  unless gemspec.files.include?('.document')
+    gemspec.extra_rdoc_files = metadata['extra_doc_files']
+  end
+
+  gemspec.post_install_message = metadata['post_install_message']
+  gemspec.requirements = metadata['requirements']
+
+  if gemspec.respond_to?(:required_ruby_version=)
+    gemspec.required_ruby_version = metadata['required_ruby_version']
+  end
+
+  if gemspec.respond_to?(:required_rubygems_version=)
+    gemspec.required_rubygems_version = metadata['required_ruby_version']
+  end
+
+  parse_versions = lambda { |versions|
+    case versions
+    when Array
+      versions.map { |v| v.to_s }
+    when String
+      versions.split(/,\s*/)
+    end
+  }
+
+  if metadata['dependencies']
+    metadata['dependencies'].each do |name,versions|
+      gemspec.add_dependency(name,parse_versions[versions])  
+    end
+  end
+
+  if metadata['runtime_dependencies']
+    metadata['runtime_dependencies'].each do |name,versions|
+      gemspec.add_runtime_dependency(name,parse_versions[versions])  
+    end
+  end
+
+  if metadata['development_dependencies']
+    metadata['development_dependencies'].each do |name,versions|
+      gemspec.add_development_dependency(name,parse_versions[versions])  
+    end
   end
 end