Function start_embedded_repl

src/python/runner.cpp:876–988

    }

    void start_embedded_repl(int read_fd, int write_fd) {
        stop_embedded_repl();
        ensure_initialized();

        auto& pm = PackageManager::instance();
        if (!pm.is_installed("ptpython")) {
            LOG_INFO("Installing ptpython...");
            const auto result = pm.install("ptpython");
            if (!result.success) {
                LOG_WARN("Failed to install ptpython: {} (falling back to code.interact)", result.error);
            } else {
                update_python_path();
            }
        }

        g_repl_read_fd = read_fd;
        g_repl_write_fd = write_fd;
        g_repl_running = true;

        g_repl_thread = std::thread([read_fd, write_fd]() {
            {
                const GilAcquire gil;
                install_output_redirect();

                SceneContextGuard ctx(get_application_scene());

                const std::string setup = std::format(R"(
import sys, os, atexit

_repl_read_fd = {}
_repl_write_fd = {}
_repl_in  = os.fdopen(os.dup(_repl_read_fd), 'r', buffering=1)
_repl_out = os.fdopen(os.dup(_repl_write_fd), 'w', buffering=1)

_saved_stdin  = sys.stdin
_saved_stdout = sys.stdout
_saved_stderr = sys.stderr
sys.stdin  = _repl_in
sys.stdout = _repl_out
sys.stderr = _repl_out

import lichtfeld as lf
_repl_locals = {{"lf": lf, "__name__": "__console__", "__doc__": None}}

_histfile = os.path.join(os.path.expanduser("~"), ".lichtfeld", "repl_history")
os.makedirs(os.path.dirname(_histfile), exist_ok=True)

_used_ptpython = False
try:
    from ptpython.repl import embed as _pt_embed
    from prompt_toolkit.output.vt100 import Vt100_Output
    from prompt_toolkit.data_structures import Size
    from prompt_toolkit.application import create_app_session

    _pt_output = Vt100_Output(_repl_out, get_size=lambda: Size(rows=24, columns=80), enable_cpr=False)
    _pt_input = None
    if not _repl_in.isatty():
        from prompt_toolkit.input.vt100 import Vt100Input