From c0b7aa00e44239085b406c24cc22c84f0af11435 Mon Sep 17 00:00:00 2001
From: Andrew Janke <andrew@apjanke.net>
Date: Mon, 11 Jun 2018 15:10:59 -0400
Subject: [PATCH] brew style: assume files under Library are no-formulae

---
 Library/Homebrew/style.rb               | 18 +++++++++++++++---
 Library/Homebrew/test/cmd/style_spec.rb | 14 ++++++++++++++
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/Library/Homebrew/style.rb b/Library/Homebrew/style.rb
index 71d291b262..c17239b3f0 100644
--- a/Library/Homebrew/style.rb
+++ b/Library/Homebrew/style.rb
@@ -57,12 +57,24 @@ module Homebrew
         args << "--only" << cops_to_include.join(",")
       end
 
+      has_non_formula = Array(files).any? do |file|
+        File.expand_path(file).start_with? HOMEBREW_LIBRARY_PATH
+      end
+      config_file = if files.nil? || has_non_formula
+        if ARGV.include?("--rspec")
+          HOMEBREW_LIBRARY_PATH/".rubocop-rspec.yml"
+        else
+          HOMEBREW_LIBRARY_PATH/".rubocop.yml"
+        end
+      else
+        HOMEBREW_LIBRARY/".rubocop_audit.yml"
+      end
+
+      args << "--config" << config_file
+
       if files.nil?
-        config_file = ARGV.include?("--rspec") ? ".rubocop-rspec.yml" : ".rubocop.yml"
-        args << "--config" << HOMEBREW_LIBRARY_PATH/config_file
         args << HOMEBREW_LIBRARY_PATH
       else
-        args << "--config" << HOMEBREW_LIBRARY/".rubocop_audit.yml"
         args += files
       end
 
diff --git a/Library/Homebrew/test/cmd/style_spec.rb b/Library/Homebrew/test/cmd/style_spec.rb
index c8ccbfbac8..64f1bb594d 100644
--- a/Library/Homebrew/test/cmd/style_spec.rb
+++ b/Library/Homebrew/test/cmd/style_spec.rb
@@ -31,4 +31,18 @@ describe "brew style" do
         .to include("Extra empty line detected at class body beginning.")
     end
   end
+
+  describe "Homebrew::check_style_and_print" do
+    let(:dir) { mktmpdir }
+
+    it "returns false for conforming file with only audit-level violations" do
+      # This file is known to use non-rocket hashes and other things that trigger audit,
+      # but not regular, cop violations
+      target_file = HOMEBREW_LIBRARY_PATH/"utils.rb"
+
+      rubocop_result = Homebrew::Style.check_style_and_print([target_file])
+
+      expect(rubocop_result).to eq false
+    end
+  end
 end