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#!/usr/bin/env python3
# Finds the macos swift library directory and prints the full path to stdout.
# First argument is the path to the swift executable.
import os
import sys
from shutil import which
from subprocess import check_output
def find_swift_lib():
swift_lib_dir = os.environ.get('SWIFT_LIB_DYNAMIC', '')
if swift_lib_dir:
return swift_lib_dir
# first check for lib dir relative to swift executable
xcode_dir = os.path.dirname(os.path.dirname(sys.argv[1]))
swift_lib_dir = os.path.join(xcode_dir, "lib", "swift", "macosx")
if os.path.isdir(swift_lib_dir):
return swift_lib_dir
# fallback to xcode-select path
xcode_select = which("xcode-select")
if not xcode_select:
sys.exit(1)
xcode_path = check_output([xcode_select, "-p"], encoding="UTF-8")
swift_lib_dir = os.path.join(xcode_path, "Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx")
if os.path.isdir(swift_lib_dir):
return swift_lib_dir
# last resort if we still haven't found a path
swift_lib_dir = os.path.join(xcode_path, "usr/lib/swift/macosx")
if not os.path.isdir(swift_lib_dir):
sys.exit(1)
return swift_lib_dir
if __name__ == "__main__":
swift_lib_dir = find_swift_lib()
sys.stdout.write(swift_lib_dir)
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