fix: make sure homebrew-core is up to date

Author: jsjoeio

ci/steps/brew-bump.sh

@@ -5,9 +5,36 @@ main() {
   cd "$(dirname "$0")/../.."
   # Only sourcing this so we get access to $VERSION
   source ./ci/lib.sh
+
+  # NOTE: we need to make sure cdrci/homebrew-core
+  # is up-to-date
+  # otherwise, brew bump-formula-pr will use an
+  # outdated base
+  echo "Cloning cdrci/homebrew-core"
+  git clone https://github.com/cdrci/homebrew-core.git
+
+  echo "Changing into homebrew-core directory"
+  cd homebrew-core && pwd
+
+  echo "Adding Homebrew/homebrew-core as `upstream`"
+  git remote add upstream https://github.com/Homebrew/homebrew-core.git
+
+  echo "Fetching upstream commits..."
+  git fetch upstream
+
+  echo "Merging in latest changes"
+  git merge upstream/master
+
+  echo "Pushing changes to cdrci/homebrew-core fork on GitHub"
+  git push origin master
+
   # Find the docs for bump-formula-pr here
   # https://github.com/Homebrew/brew/blob/master/Library/Homebrew/dev-cmd/bump-formula-pr.rb#L18
   brew bump-formula-pr --force --version="${VERSION}" code-server --no-browse --no-audit
+
+  # Clean up and remove homebrew-core
+  cd ..
+  rm -rf homebrew-core
 }
 
 main "$@"