newgem.gemspec.tt in bundler-2.5.7

- old
+ new

@@ -25,12 +25,13 @@
   spec.metadata["source_code_uri"] = "TODO: Put your gem's public repo URL here."
   spec.metadata["changelog_uri"] = "TODO: Put your gem's CHANGELOG.md URL here."
 
   # 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.
-  spec.files = Dir.chdir(__dir__) do
-    `git ls-files -z`.split("\x0").reject do |f|
-      (File.expand_path(f) == __FILE__) ||
+  gemspec = File.basename(__FILE__)
+  spec.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 <%= config[:ci_config_path] %>appveyor Gemfile])
     end
   end
   spec.bindir = "exe"
   spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }