From caf7df5840d9507ff99fcf8385ffa1f42ada6e2d Mon Sep 17 00:00:00 2001
From: "L. E. Segovia" <13498015+amyspark@users.noreply.github.com>
Date: Tue, 1 Oct 2019 11:17:27 +0000
Subject: [PATCH] Cask: add doctor check for xattr

CC: Homebrew/homebrew-cask#69660
---
 Library/Homebrew/cask/cmd/doctor.rb | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Library/Homebrew/cask/cmd/doctor.rb b/Library/Homebrew/cask/cmd/doctor.rb
index 0a6a015bba..48d432453d 100644
--- a/Library/Homebrew/cask/cmd/doctor.rb
+++ b/Library/Homebrew/cask/cmd/doctor.rb
@@ -25,6 +25,7 @@ module Cask
 
       def run
         check_software_versions
+        check_xattr
         check_quarantine_support
         check_install_location
         check_staging_location
@@ -121,6 +122,29 @@ module Cask
         (locale_variables + environment_variables).sort.each(&method(:render_env_var))
       end
 
+      def check_xattr
+        ohai "xattr issues"
+        result = system_command "/usr/bin/xattr"
+
+        if result.status.success?
+          puts none_string
+        elsif result.stderr.match? "ImportError: No module named pkg_resources"
+          result = system_command "/usr/bin/python", "--version"
+
+          if result.stdout.match? "Python 2.7"
+            add_error "Your Python installation has a broken version of setuptools."
+            add_error "To fix, reinstall macOS or run 'sudo /usr/bin/python -m pip install -I setuptools'."
+          else
+            add_error "The system Python version is wrong."
+            add_error "To fix, run 'defaults write com.apple.versioner.python Version 2.7'."
+          end
+        elsif result.stderr.match? "pkg_resources.DistributionNotFound"
+          add_error "Your Python installation is unable to find xattr."
+        else
+          add_error "unknown xattr error: #{result.stderr.first}"
+        end
+      end
+
       def check_quarantine_support
         ohai "Gatekeeper support"