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#!/usr/bin/env python3
# Logic copied from compiler_swift.py in the waf build. This checks for the sdk
# path, the sdk version, and the sdk build version. The sdk path is returned
# along with what is selected as the sdk version.
import re
import os
import string
import sys
from distutils.version import StrictVersion
from shutil import which
from subprocess import check_output
def find_macos_sdk():
sdk = os.environ.get('MACOS_SDK', '')
sdk_version = os.environ.get('MACOS_SDK_VERSION', '0.0')
xcrun = which('xcrun')
if not xcrun:
return sdk,sdk_version
if not sdk:
sdk = check_output([xcrun, '--sdk', 'macosx', '--show-sdk-path'],
encoding="UTF-8")
# find macOS SDK paths and version
if sdk_version == '0.0':
# show-sdk-build-version: is not available on older command line tools, but returns a build version (eg 17A360)
# show-sdk-version: is always available, but on older dev tools it's only the major version
sdk_build_version = check_output([xcrun, '--sdk', 'macosx',
'--show-sdk-build-version'], encoding="UTF-8")
sdk_version = check_output([xcrun, '--sdk', 'macosx', '--show-sdk-version'],
encoding="UTF-8")
if sdk:
build_version = '10.10.0'
# convert build version to a version string
# first 2 two digits are the major version, starting with 15 which is 10.11 (offset of 4)
# 1 char is the minor version, A => 0, B => 1 and ongoing
# last digits are bugfix version, which are not relevant for us
# eg 16E185 => 10.12.4, 17A360 => 10.13, 18B71 => 10.14.1
if sdk_build_version and isinstance(sdk_build_version, str):
verRe = re.compile("(\d+)(\D+)(\d+)")
version_parts = verRe.search(sdk_build_version)
major = int(version_parts.group(1)) - 4
minor = string.ascii_lowercase.index(version_parts.group(2).lower())
build_version = '10.' + str(major) + '.' + str(minor)
# from 20 onwards macOS 11.0 starts
if int(version_parts.group(1)) >= 20:
build_version = '11.' + str(minor)
if not isinstance(sdk_version, str):
sdk_version = '10.10.0'
# pick the higher version, always pick sdk over build if newer
if StrictVersion(build_version) > StrictVersion(sdk_version):
return sdk,build_version
else:
return sdk,sdk_version
return sdk,sdk_version
if __name__ == "__main__":
sdk_info = find_macos_sdk()
sys.stdout.write(','.join(sdk_info))
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