Refactor macdeploycheck formula to use direct script installation and improve error handling in install_brew_deps.sh

This commit updates the `macdeploycheck` formula to install the script directly from the tapped repository, ensuring consistency with the tapped revision. Additionally, the `install_brew_deps.sh` script is modified to provide clearer error messages when loading formulae fails, enhancing the overall user experience during dependency checks.

Formula/macdeploycheck.rb

@@ -2,16 +2,16 @@ class Macdeploycheck < Formula
   desc "Sanity checks a macOS .app bundle for accidental Homebrew runtime dependencies"
   homepage "https://github.com/strawberrymusicplayer/strawberry"
   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__)}"
   sha256 :no_check
   license "MIT"
 
   depends_on :macos
 
   def install
-    # Install the script from the tapped repo working tree.
-    # (__dir__ is .../Formula, so ../.. is the tap root)
-    script = File.expand_path("../../dist/macos/macdeploycheck.sh", __dir__)
-    bin.install script => "macdeploycheck"
+    bin.install "macdeploycheck.sh" => "macdeploycheck"
   end
 
   test do

build_tools/macos/install_brew_deps.sh

@@ -94,10 +94,10 @@ run_with_heartbeat "Refreshing strawberry/local tap clone" bash -lc '
 '
 
 for f in kdsingleapplication-qt6 qtsparkle-qt6 sparkle-framework libgpod macdeploycheck; do
-  if ! brew info "strawberry/local/${f}" >/dev/null 2>&1; then
-    echo "Error: Missing formula strawberry/local/${f} in the tapped repo." >&2
+  if ! info_out="$(brew info "strawberry/local/${f}" 2>&1 >/dev/null)"; then
+    echo "Error: Unable to load formula strawberry/local/${f} from the tapped repo (brew info failed)." >&2
     echo "Details (brew info):" >&2
-    brew info "strawberry/local/${f}" >&2 || true
+    echo "$info_out" >&2
     echo "If you recently added/changed formulae, ensure they are committed, then refresh the tap:" >&2
     echo "  git -C \"$(brew --repo strawberry/local)\" pull --ff-only" >&2
     exit 1