When installing android sdk using home-brew I get this message
android-sdk has been officially discontinued upstream.
But I can't find an alternative package to use. Is there a different one I should be using?
If you don't want the full android-studio development app (Intellij IDE, etc) and just want the new command line tools...
Per the discontinuation notice for android-sdk...
This SDK Tools package is deprecated and no longer receiving updates. Instead, please use the new command-line tools package.
A quick search reveals that in homebrew land, this new "command-line tools" package is called android-commandlinetools.
$ brew remove android-sdk
$ brew install --cask android-commandlinetools
If you are looking for adb and such, these are "SDK Platform Tools" and can be installed using sdkmanager (which was installed by the new android-commandlinetools package)...
$ sdkmanager --install platform-tools
Depending on where sdkmanager installs platform-tools you might need to update your $PATH or add symlinks in order to run adb and other platform-tools without an absolute path.
...or if you just want adb/etc you can skip the full commandlinetools and install platform-tools directly with homebrew. This has the side benefit of ensuring the newly installed adb is within your $PATH and is probably the best option for people that aren't doing android development and just want the latest adb, fastboot, etc.
$ brew install --cask android-platform-tools