buildroot macOS SDK finder script fails on new Xcode cipd package: SDK "macosx10.15" cannot be located #94513
Description
The buildroot SDK finder script is checking directory names.
https://github.com/flutter/buildroot/blob/42be4395efc85e455bbdd555ef2791615338dbea/build/mac/find_sdk.py#L64
xcodebuild: error: SDK "macosx10.15" cannot be located.
Traceback (most recent call last):
File "/opt/s/w/ir/cache/builder/src/build/mac/find_sdk.py", line 102, in <module>
print((main()))
File "/opt/s/w/ir/cache/builder/src/build/mac/find_sdk.py", line 86, in main
sdk_output = subprocess.check_output(['xcodebuild', '-version', '-sdk',
File "/opt/s/w/ir/cipd_bin_packages/cpython3/lib/python3.8/subprocess.py", line 415, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
File "/opt/s/w/ir/cipd_bin_packages/cpython3/lib/python3.8/subprocess.py", line 516, in run
raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['xcodebuild', '-version', '-sdk', 'macosx10.15', 'Path']' returned non-zero exit status 64.
Due to an unfortunate Ruby header issue, there is a macosx10.15 SDK directory, but Xcode doesn't think it's actually installed. It would be better to check with Xcode for which SDKs are actually installed instead of path parsing.