sorbet: set utils/user.rb to true

Library/Homebrew/sorbet/files.yaml

@@ -456,7 +456,6 @@ false:
   - ./utils/git.rb
   - ./utils/github.rb
   - ./utils/popen.rb
-  - ./utils/user.rb
 
 false:
   - ./PATH.rb
@@ -895,6 +894,7 @@ true:
   - ./utils/shell.rb
   - ./utils/svn.rb
   - ./utils/tty.rb
+  - ./utils/user.rb
   - ./version/null.rb
 
 strict:

Library/Homebrew/sorbet/rbi/utils/user.rbi

@@ -0,0 +1,9 @@
+# typed: strict
+
+class User < String
+  def gui?
+  end
+
+  def self.current
+  end
+end

Library/Homebrew/utils/user.rb

@@ -16,6 +16,11 @@ def gui?
   end
 
   def self.current
-    @current ||= new(Etc.getpwuid(Process.euid).name)
+    return @current if defined?(@current)
+
+    pwuid = Etc.getpwuid(Process.euid)
+    return if pwuid.nil?
+
+    @current = new(pwuid.name)
   end
 end