swift code coverage

codecov.py

import json
import subprocess
from pathlib import Path 

def shell(cmd, stdout=None) -> str:
    return subprocess.run(cmd.split(' '), stdout=stdout, check=True, text=True).stdout

def get_package() -> dict:
    return json.loads(shell('swift package describe --type json', stdout=subprocess.PIPE))

def get_codecov_path(configuration: str) -> Path:
    # .build/x86_64-apple-macosx/{configuration}/codecov/XCAudit.json
    return Path(shell(f'swift test --show-codecov-path --configuration {configuration}', stdout=subprocess.PIPE)).parent

def code_coverage(configuration: str):
    package_name = get_package()['name']
    codecov_path = get_codecov_path(configuration=configuration)

    # .build/x86_64-apple-macosx/{configuration}/{package_name}PackageTests.xctest/Contents/MacOS/{package_name}PackageTests
    binary_path = codecov_path.parent / f'{package_name}PackageTests.xctest/Contents/MacOS/{package_name}PackageTests'
    # .build/x86_64-apple-macosx/{configuration}/codecov/default.profdata
    prof_data_path = codecov_path / 'default.profdata'

    shell(f'xcrun llvm-cov report {binary_path} --format=text -instr-profile={prof_data_path} -ignore-filename-regex=Tests')

if __name__ == "__main__":
    import argparse
    parser = argparse.ArgumentParser(description='Code coverage for swift packages')
    parser.add_argument('-c', '--configuration', type=str, default='debug', help='Swift package build configuration (debug|release) [default: debug]')
    args = parser.parse_args()
    code_coverage(**vars(args))