Aggressively prune files from the gems we install

See what we can do about our overall file size and counnt by removing
non-library files from the package.

Signed-off-by: Tim Smith <tsmith@chef.io>

omnibus/config/projects/chef-workstation.rb

@@ -91,6 +91,9 @@
 dependency "uninstall-scripts"
 dependency "ruby-cleanup"
 
+# further gem cleanup other projects might not yet want to use
+dependency "more-ruby-cleanup"
+
 dependency "go"
 dependency "main-chef-wrapper"
 dependency "chef-analyze"

omnibus/config/software/more-ruby-cleanup.rb

@@ -0,0 +1,104 @@
+#
+# Copyright:: 2019 Chef Software, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require "fileutils"
+
+name "more-ruby-cleanup"
+
+skip_transitive_dependency_licensing true
+license :project_license
+
+source path: "#{project.files_path}/#{name}"
+
+dependency "ruby"
+dependency "rubygems"
+
+build do
+  block "Removing additional non-code files from installed gems" do
+    # find the embedded ruby gems dir and clean it up for globbing
+    target_dir = "#{install_dir}/embedded/lib/ruby/gems/*/gems".tr('\\', "/")
+    files = %w{
+      .github
+      examples
+      example
+      docs
+      doc
+      doc-api
+      sample
+      samples
+      test
+      tests
+      benchmark
+      benchmarks
+      rakelib
+      CHANGELOG.md
+      CONTRIBUTORS.md
+      README.md
+      README.markdown
+      HISTORY.md
+      TODO.md
+      CONTRIBUTING.md
+      ISSUE_TEMPLATE.md
+      UPGRADING.md
+      CODE_OF_CONDUCT.md
+      Code-of-Conduct.md
+      ARCHITECTURE.md
+      CHANGES.md
+      README.YARD.md
+      GUIDE.md
+      MIGRATING.md
+      README.txt
+      HISTORY.txt
+      Manifest.txt
+      Manifest
+      CHANGES.txt
+      CHANGELOG.txt
+      warning.txt
+      FAQ.txt
+      release-script.txt
+      TODO
+      HISTORY
+      CHANGES
+      CHANGELOG
+      README
+      Gemfile
+      Gemfile.travis
+      Gemfile.lock
+      Gemfile.devtools
+      README.rdoc
+      CHANGELOG.rdoc
+      History.rdoc
+      CONTRIBUTING.rdoc
+      README_INDEX.rdoc
+      logo.png
+      donate.png
+      Appraisals
+      website
+      *.gemspec
+    }
+
+    Dir.glob(Dir.glob("#{target_dir}/*/{#{files.join(",")}}")).each do |f|
+      puts "Deleting #{f}"
+      if File.directory?(f)
+        # recursively removes files and the dir
+        FileUtils.remove_dir(f)
+      else
+        File.delete(f)
+      end
+    end
+  end
+end