#!/usr/bin/env python3

#
# This file is distributed under the MIT License. See LICENSE.md for details.
#

# This script is a wrapper around `llvm-symbolizer`, which allows providing
# a JSON stack trace (easy to parse) together with a traditional stacktrace
# (easier to read for programmers).
# The JSON stack trace is saved to the path specified by
# `SYMBOLIZER_WRAPPER_OUTPUT` whereas the traditional stacktrace is written to
# stdout, as the unwrapped symbolizer would do.

import os
import sys
from subprocess import PIPE, Popen


def main():
    args = sys.argv[1:]
    json_args = [*args, "--output-style=JSON", "--relativenames"]

    symbolizer_bin = os.environ["SYMBOLIZER_WRAPPER_SYMBOLIZER_PATH"]
    output_path = os.environ["SYMBOLIZER_WRAPPER_OUTPUT"]

    with open(output_path, "wb") as json_file:
        json_symbolizer = Popen(
            ("llvm-symbolizer", *json_args),
            executable=symbolizer_bin,
            stdin=PIPE,
            stdout=json_file,
            text=False,
        )
        regular_symbolizer = Popen(
            ("llvm-symbolizer", *args),
            executable=symbolizer_bin,
            stdin=PIPE,
            stdout=sys.stdout,
            text=False,
        )

        for line in sys.stdin.buffer:
            json_symbolizer.stdin.write(line)
            regular_symbolizer.stdin.write(line)

        json_symbolizer.stdin.close()
        regular_symbolizer.stdin.close()

        json_symbolizer.wait()
        regular_symbolizer.wait()

        return regular_symbolizer.returncode


if __name__ == "__main__":
    sys.exit(main())