Fixes#20374
When using HOMEBREW_DOWNLOAD_CONCURRENCY, cask binaries were being
downloaded before checking if the cask could actually be installed
(e.g., disabled casks or conflict checks). This resulted in unnecessary
downloads for casks that would ultimately fail to install.
This change adds a `prelude` method to Cask::Installer that performs
early validation checks (deprecation/disable status and conflicts)
similar to Formula#prelude_fetch. The prelude method is called before
enqueueing downloads in all download queue scenarios (install, reinstall,
and upgrade commands), ensuring that validation failures occur before
the "Fetching downloads for:" message is displayed.
Key changes:
- Add Cask::Installer#prelude method with @ran_prelude tracking
- Call prelude before enqueueing downloads in install/reinstall/upgrade
- Refactor to avoid creating installer objects multiple times
- Maintain backward compatibility for non-download-queue scenarios
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
