import hashlib
import json
import os
import subprocess

def write(path, value):
    tmp = path.with_suffix(path.suffix + '.tmp')
    with tmp.open('w') as f:
        json.dump(value, f, indent=2, sort_keys=True); f.write('\n'); f.flush(); os.fsync(f.fileno())
    tmp.replace(path)

def run(argv, target, timeout=180, check=True):
    p = subprocess.run(argv, capture_output=True, timeout=timeout)
    target.with_suffix('.stdout.log').write_bytes(p.stdout)
    target.with_suffix('.stderr.log').write_bytes(p.stderr)
    record = {'argv': argv, 'returncode': p.returncode,
              'stdout_sha256': hashlib.sha256(p.stdout).hexdigest(),
              'stderr_sha256': hashlib.sha256(p.stderr).hexdigest()}
    write(target.with_suffix('.execution.json'), record)
    if check and p.returncode:
        raise RuntimeError(f'{target.name}: exit {p.returncode}')
    return record