From 74a8e5bb235cfdc476b84863e2eb1847fc3eec3e Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Thu, 11 Aug 2022 10:57:19 +0100
Subject: [PATCH] dev-cmd/rubocop: use bundle check.

It's not reliable enough to just check for the binary.
---
 Library/Homebrew/dev-cmd/rubocop.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/dev-cmd/rubocop.sh b/Library/Homebrew/dev-cmd/rubocop.sh
index bc1b8ca769..28e9df7a42 100644
--- a/Library/Homebrew/dev-cmd/rubocop.sh
+++ b/Library/Homebrew/dev-cmd/rubocop.sh
@@ -13,13 +13,16 @@ homebrew-rubocop() {
 
   GEM_VERSION="$("${HOMEBREW_RUBY_PATH}" "${RUBY_DISABLE_OPTIONS}" -rrbconfig -e 'puts RbConfig::CONFIG["ruby_version"]')"
   GEM_HOME="${HOMEBREW_LIBRARY}/Homebrew/vendor/bundle/ruby/${GEM_VERSION}"
+  BUNDLE_GEMFILE="${HOMEBREW_LIBRARY}/Homebrew/Gemfile"
 
-  if ! [[ -f "${GEM_HOME}/bin/rubocop" ]]
+  export GEM_HOME
+  export BUNDLE_GEMFILE
+
+  if ! bundle check &>/dev/null
   then
     "${HOMEBREW_BREW_FILE}" install-bundler-gems
   fi
 
-  export GEM_HOME
   export PATH="${GEM_HOME}/bin:${PATH}"
 
   RUBOCOP="${HOMEBREW_LIBRARY}/Homebrew/utils/rubocop.rb"