This assumes that all should be downloaded (at least once) on `brew`
commands being run.
Requires a certain amount of cleanup and refactoring around our API
handling and Tap migration methods (which were both weirdly placed and
in some cases broken).
Behaviour without `HOMEBREW_DOWNLOAD_CONCURRENCY` set should
be unchanged.
Allowing using `HOMEBREW_DOWNLOAD_CONCURRENCY` to use the
`DownloadQueue` for `brew install` by downloading and extracting
bottles in parallel.
This requires some fixes in e.g. `Dependency` and `FormulaInstaller`
to be able to front-load all downloads and handle parallelisation of
bottle pouring.
Behaviour without `HOMEBREW_DOWNLOAD_CONCURRENCY` set should be
unchanged.
Attestations are not handled for now and the UI should be improved
before we roll this out to users.
Post-install upgrades are not yet parallelised.
Co-authored-by: Carlo Cabrera <github@carlo.cab>
- Use undocumented (for now) `HOMEBREW_DOWNLOAD_CONCURRENCY` instead
of `--concurrency` flag and avoid passing around `concurrency`
- Create and use `Formula#enqueue_resources_and_patches` helper method
- Rename some method calls to be more obvious
- Use `Downloadable` type to simplify type checks
- General refactoring
This is the first step towards using the download queue for all
download operations e.g. `brew install`, `brew upgrade`,
`brew reinstall` etc.
While we're here, do some API cleanup and Sorbet type improvements.
