- Allow specifying user through `/var/tmp/.homebrew_pkg_user.plist`
- Improve permission handling
- Correctly write API cache
- Add `preinstall` script to fail if we can't get a valid user
Co-authored-by: Mike McQuaid <mike@mikemcquaid.com>
- don't include GitHub Actions credentials
- generate and include RTF version of Homebrew BSD license
- create nicer installer with `productbuild`
- customise welcome/conclusion messages
- add Homebrew logo as a background image
- remove unnecessary `preinstall` script
- cleanup `postinstall` script to pass `brew doctor`
- use `Distribution.xml` for a nicer installer
- require CLT or Xcode rather than using our hacks to try and install
CLT during installation
