1 files changed, 25 insertions, 20 deletions
diff --git a/Library/Homebrew/cmd/style.rb b/Library/Homebrew/cmd/style.rb
index db61116be..e666eb200 100644
--- a/Library/Homebrew/cmd/style.rb
+++ b/Library/Homebrew/cmd/style.rb
@@ -19,7 +19,7 @@ require "utils/json"
 module Homebrew
   def style
     target = if ARGV.named.empty?
-      [HOMEBREW_LIBRARY_PATH]
+      nil
     elsif ARGV.named.any? { |file| File.exist? file }
       ARGV.named
     elsif ARGV.named.any? { |tap| tap.count("/") == 1 }
@@ -49,27 +49,32 @@ module Homebrew
 
     args = %W[
       --force-exclusion
-      --config #{HOMEBREW_LIBRARY}/.rubocop.yml
     ]
     args << "--auto-correct" if fix
-    args += files
-
-    HOMEBREW_LIBRARY.cd do
-      case output_type
-      when :print
-        args << "--display-cop-names" if ARGV.include? "--display-cop-names"
-        system "rubocop", "--format", "simple", *args
-        !$?.success?
-      when :json
-        json = Utils.popen_read_text("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
-        raise "Error while running RuboCop" if $?.exitstatus.nil? || $?.exitstatus > 1
-        RubocopResults.new(Utils::JSON.load(json))
-      else
-        raise "Invalid output_type for check_style_impl: #{output_type}"
-      end
+
+    if files.nil?
+      args << "--config" << HOMEBREW_LIBRARY_PATH/".rubocop.yml"
+      args += [HOMEBREW_LIBRARY_PATH]
+    else
+      args << "--config" << HOMEBREW_LIBRARY/".rubocop.yml"
+      args += files
+    end
+
+    case output_type
+    when :print
+      args << "--display-cop-names" if ARGV.include? "--display-cop-names"
+      args << "--format" << "simple" if files
+      system "rubocop", *args
+      !$?.success?
+    when :json
+      json = Utils.popen_read_text("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
+      raise "Error while running RuboCop" if $?.exitstatus.nil? || $?.exitstatus > 1
+      RubocopResults.new(Utils::JSON.load(json))
+    else
+      raise "Invalid output_type for check_style_impl: #{output_type}"
     end
   end