Enhance install_brew_deps.sh with Brewfile support check and error handling

This commit adds a check for the availability of `brew bundle` in the `install_brew_deps.sh` script, ensuring that users are informed to update Homebrew if the command is missing. Additionally, the `macdeploycheck` formula is updated to correct the path for the script installation, aligning it with the tapped repository structure. These changes improve the robustness and user experience during the installation of Homebrew dependencies.

Formula/macdeploycheck.rb

@@ -4,7 +4,7 @@ class Macdeploycheck < Formula
   version "0.1.0"
   # Homebrew requires a URL stanza. Use the script shipped in this tap (file://),
   # so installs always match the tapped revision.
-  url "file://#{File.expand_path("../../dist/macos/macdeploycheck.sh", __dir__)}"
+  url "file://#{File.expand_path("../dist/macos/macdeploycheck.sh", __dir__)}"
   sha256 :no_check
   license "MIT"
 

build_tools/macos/install_brew_deps.sh

@@ -56,6 +56,18 @@ if ! command -v brew >/dev/null 2>&1; then
   exit 1
 fi
 
+# Brewfile support (`brew bundle`) is built into modern Homebrew. The historical
+# tap `homebrew/bundle` has been deprecated and may be empty on newer Homebrew.
+# If `brew bundle` is missing, the fix is to update Homebrew itself.
+if ! brew bundle --help >/dev/null 2>&1; then
+  run_with_heartbeat "Updating Homebrew (required for 'brew bundle')" bash -lc "brew update"
+  if ! brew bundle --help >/dev/null 2>&1; then
+    echo "Error: This Homebrew installation does not provide 'brew bundle'." >&2
+    echo "Update Homebrew (e.g. 'brew update') or reinstall Homebrew, then re-run this script." >&2
+    exit 1
+  fi
+fi
+
 # Homebrew taps are git clones; local formula changes must be committed to be visible.
 if command -v git >/dev/null 2>&1 && git -C "$repo_root" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   if git -C "$repo_root" status --porcelain Formula/ | grep -q .; then