Patch a Qt install on macOS to fix https://github.com/miurahr/aqtinstall/issues/100

patchqt

#!/usr/bin/env python3
"""
Change the installation prefix of a Qt install
"""
import argparse
import os
import sys

from pathlib import Path


PREFIX_VAR = b"qt_prfxpath="


def find_qtcore_files(prefix):
    framework_dir = prefix.joinpath("lib", "QtCore.framework")
    assert framework_dir.exists(), "Invalid installation prefix"
    return framework_dir.joinpath("QtCore").resolve(), \
        framework_dir.joinpath("QtCore_debug").resolve()


def patch_qtcore(qtcore_path, prefix):
    data = qtcore_path.read_bytes()
    old_len = len(data)

    idx = data.find(PREFIX_VAR)
    assert idx > 0, f"Could not find {PREFIX_VAR} in {qtcore_path}"
    value = PREFIX_VAR + bytes(prefix, "ascii")
    data = data[:idx] + value + data[idx + len(value):]

    assert len(data) == old_len

    qtcore_path.rename(str(qtcore_path) + ".old")
    qtcore_path.write_bytes(data)


def main():
    parser = argparse.ArgumentParser()
    parser.description = __doc__

    parser.add_argument("prefix", help="Qt Installation prefix")

    args = parser.parse_args()

    prefix = Path(args.prefix)
    qtcore_paths = find_qtcore_files(prefix)

    for qtcore_path in qtcore_paths:
        print(f"Patching {qtcore_path}")
        patch_qtcore(qtcore_path, args.prefix)

    return 0


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