If it's in .gitignore, it shouldn't be part of the gem.

Rakefile

@@ -23,11 +23,15 @@ The Google API Ruby Client makes it trivial to discover and access supported
 APIs.
 TEXT
 
-PKG_FILES = FileList[
+list = FileList[
     'lib/**/*', 'spec/**/*', 'vendor/**/*',
     'tasks/**/*', 'website/**/*',
     '[A-Z]*', 'Rakefile'
-].exclude(/database\.yml/).exclude(/[_\.]git$/)
+]
+(open(".gitignore") { |file| file.read }).split("\n").each do |pattern|
+  list.exclude(pattern)
+end
+PKG_FILES = list
 
 RCOV_ENABLED = !!(RUBY_PLATFORM != 'java' && RUBY_VERSION =~ /^1\.8/)
 if RCOV_ENABLED

google-api-client.gemspec

@@ -6,16 +6,16 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Bob Aman", "Steve Bazyl"]
-  s.date = "2012-10-25"
+  s.date = "2012-11-19"
   s.description = "The Google API Ruby Client makes it trivial to discover and access supported\nAPIs.\n"
   s.email = "[email protected]"
   s.executables = ["google-api"]
   s.extra_rdoc_files = ["README.md"]
-  s.files = ["lib/compat", "lib/compat/multi_json.rb", "lib/google", "lib/google/api_client", "lib/google/api_client/auth", "lib/google/api_client/auth/jwt_asserter.rb", "lib/google/api_client/auth/pkcs12.rb", "lib/google/api_client/batch.rb", "lib/google/api_client/client_secrets.rb", "lib/google/api_client/discovery", "lib/google/api_client/discovery/api.rb", "lib/google/api_client/discovery/media.rb", "lib/google/api_client/discovery/method.rb", "lib/google/api_client/discovery/resource.rb", "lib/google/api_client/discovery/schema.rb", "lib/google/api_client/discovery.rb", "lib/google/api_client/environment.rb", "lib/google/api_client/errors.rb", "lib/google/api_client/media.rb", "lib/google/api_client/reference.rb", "lib/google/api_client/request.rb", "lib/google/api_client/result.rb", "lib/google/api_client/service_account.rb", "lib/google/api_client/version.rb", "lib/google/api_client.rb", "lib/google/inflection.rb", "spec/fixtures", "spec/fixtures/files", "spec/fixtures/files/sample.txt", "spec/google", "spec/google/api_client", "spec/google/api_client/batch_spec.rb", "spec/google/api_client/discovery_spec.rb", "spec/google/api_client/media_spec.rb", "spec/google/api_client/result_spec.rb", "spec/google/api_client/service_account_spec.rb", "spec/google/api_client_spec.rb", "spec/spec_helper.rb", "tasks/gem.rake", "tasks/git.rake", "tasks/metrics.rake", "tasks/spec.rake", "tasks/wiki.rake", "tasks/yard.rake", "CHANGELOG.md", "Gemfile", "Gemfile.lock", "LICENSE", "Rakefile", "README.md", "bin/google-api"]
+  s.files = ["lib/compat", "lib/compat/multi_json.rb", "lib/google", "lib/google/api_client", "lib/google/api_client.rb", "lib/google/api_client/auth", "lib/google/api_client/auth/jwt_asserter.rb", "lib/google/api_client/auth/key_utils.rb", "lib/google/api_client/auth/pkcs12.rb", "lib/google/api_client/batch.rb", "lib/google/api_client/client_secrets.rb", "lib/google/api_client/discovery", "lib/google/api_client/discovery.rb", "lib/google/api_client/discovery/api.rb", "lib/google/api_client/discovery/media.rb", "lib/google/api_client/discovery/method.rb", "lib/google/api_client/discovery/resource.rb", "lib/google/api_client/discovery/schema.rb", "lib/google/api_client/environment.rb", "lib/google/api_client/errors.rb", "lib/google/api_client/media.rb", "lib/google/api_client/reference.rb", "lib/google/api_client/request.rb", "lib/google/api_client/result.rb", "lib/google/api_client/service_account.rb", "lib/google/api_client/version.rb", "lib/google/inflection.rb", "spec/fixtures", "spec/fixtures/files", "spec/fixtures/files/privatekey.p12", "spec/fixtures/files/sample.txt", "spec/fixtures/files/secret.pem", "spec/google", "spec/google/api_client", "spec/google/api_client/batch_spec.rb", "spec/google/api_client/discovery_spec.rb", "spec/google/api_client/media_spec.rb", "spec/google/api_client/result_spec.rb", "spec/google/api_client/service_account_spec.rb", "spec/google/api_client_spec.rb", "spec/spec_helper.rb", "tasks/gem.rake", "tasks/git.rake", "tasks/metrics.rake", "tasks/spec.rake", "tasks/wiki.rake", "tasks/yard.rake", "CHANGELOG.md", "Gemfile", "LICENSE", "README.md", "Rakefile", "bin/google-api"]
   s.homepage = "http://code.google.com/p/google-api-ruby-client/"
   s.rdoc_options = ["--main", "README.md"]
   s.require_paths = ["lib"]
-  s.rubygems_version = "1.8.10"
+  s.rubygems_version = "1.8.24"
   s.summary = "Package Summary"
 
   if s.respond_to? :specification_version then