Use `XDG_CACHE_HOME` for RuboCop.

1 files changed, 4 insertions, 3 deletions

diff --git a/Library/Homebrew/cmd/style.rb b/Library/Homebrew/cmd/style.rb
index 687ee36b8..228aa360e 100644
--- a/Library/Homebrew/cmd/style.rb
+++ b/Library/Homebrew/cmd/style.rb
@@ -19,6 +19,7 @@
 
 require "utils"
 require "json"
+require "open3"
 
 module Homebrew
   module_function
@@ -104,16 +105,16 @@ module Homebrew
     when :print
       args << "--display-cop-names" if ARGV.include? "--display-cop-names"
       args << "--format" << "simple" if files
-      system "rubocop", *args
+      system({ "XDG_CACHE_HOME" => HOMEBREW_CACHE }, "rubocop", *args)
       !$?.success?
     when :json
-      json = Utils.popen_read_text("rubocop", "--format", "json", *args)
+      json, _, status = Open3.capture3({ "XDG_CACHE_HOME" => HOMEBREW_CACHE }, "rubocop", "--format", "json", *args)
       # exit status of 1 just means violations were found; other numbers mean
       # execution errors.
       # exitstatus can also be nil if RuboCop process crashes, e.g. due to
       # native extension problems.
       # JSON needs to be at least 2 characters.
-      if $?.exitstatus.nil? || $?.exitstatus > 1 || json.to_s.length < 2
+      if !status.success? || json.to_s.length < 2
         raise "Error running `rubocop --format json #{args.join " "}`"
       end
       RubocopResults.new(JSON.parse(json))