Xcode >=10.2 is required to build all Swift formulae on macOS >=10.14.4.
Rather than requiring per-formula workarounds
(e.g. Homebrew/homebrew-core#39446) this provides a more stable platform
Homebrew can rely on for building Swift formulae.
Some SDKs return a number higher than the hard-coded `latest_version`
in this file. With the current `==` check, those higher version numbers
are treated as "not the latest". This prevents machines with
higher-versioned SDKs from being able to use Homebrew.
To resolve that problem, this PR changes the check to `>=`, which allows
machines with higher-versioned SDKs to also use Homebrew to install
packages.
The version of CLT package that comes with Xcode 10.1 is 1000.10.44.4,
which could be bumped at a later date since the Software Update is not
reliable at this moment.
Rather than having to manually keep track of what version each thing in
here is and copy files around by hand on update let's use Bundler's
standalone mode and careful use of `.gitignore` to help us do it.
This means a `bundle update --standalone` will allow us to update all
gems in vendor.
We could consider vendoring other gems this way in future but I'd
suggest only doing this for gems with no dependencies or at least gems
with no native extensions. The only gem this applies to that we
currently use is `ruby-prof` and I'm not convinced it's widely used
enough to warrant vendoring for everyone. Perhaps that's another
criteria: it should be functionality that's used by non-developer
commands and/or normal Homebrew usage.
Adjust the rules based on the current codebase. Remove various enable,
disables and default values that are unnecessary. Add more comments
explaining why. Make minor changes needed to enable a few more rules.
Use 124 max line length everywhere. Also, reduce tap max line length to
189 as Homebrew/homebrew-core has that as a maximum now. In future
Homebrew/homebrew-core will also be reduced to 124 maximum line length.
