#!/usr/bin/env python3
"""pure-run, recorded: runs the real one (PURE_RUN) with the same
arguments and input, passes its output and exit on, and appends a JSON line
to PURE_RUN_LOG: the module's bytes, the arguments, the input, the output
and the errors, each as a SHA-256 with the check's temporary directory
written as $W, and the exit code. Given to aup's check as --pure-run."""
import hashlib
import json
import os
import re
import subprocess
import sys

TEMP = re.compile(rb'/[^\s"\'\\]*?/(?:aup-check|pure-check)-[A-Za-z0-9_]+')


def digest(data):
    return hashlib.sha256(TEMP.sub(b'$W', data)).hexdigest()[:24]


given = sys.stdin.buffer.read()
args = sys.argv[1:]
done = subprocess.run([os.environ['PURE_RUN'], *args], input=given, capture_output=True)
sys.stdout.buffer.write(done.stdout)
sys.stderr.buffer.write(done.stderr)
module = next((a for a in args if a.endswith('.pmod') and os.path.exists(a)), None)
line = {'module': hashlib.sha256(open(module, 'rb').read()).hexdigest()[:24] if module else None,
        'args': digest('\0'.join(args).encode()), 'input': digest(given), 'output': digest(done.stdout),
        'errors': digest(done.stderr), 'exit': done.returncode}
with open(os.environ['PURE_RUN_LOG'], 'a') as log:
    log.write(json.dumps(line) + '\n')
sys.exit(done.returncode)