Merge pull request #945 from krororo/remove-test-files

Remove unused files from package

Author: y-yagi

draper.gemspec

@@ -10,8 +10,15 @@ Gem::Specification.new do |s|
   s.description = "Draper adds an object-oriented layer of presentation logic to your Rails apps."
   s.license     = "MIT"
 
-  s.files         = `git ls-files`.split("\n")
-  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  # Specify which files should be added to the gem when it is released.
+  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  gemspec = File.basename(__FILE__)
+  s.files = IO.popen(%w[git ls-files -z], chdir: __dir__, err: IO::NULL) do |ls|
+    ls.readlines("\x0", chomp: true).reject do |f|
+      (f == gemspec) ||
+        f.start_with?(*%w[bin/ test/ spec/ features/ .git appveyor Gemfile])
+    end
+  end
   s.require_paths = ["lib"]
 
   s.required_ruby_version = '>= 2.2.2'