"""SSH 密码：环境变量 FL_SSH_PASS，否则读 gps 目录下 fl_ssh_pass.txt / .fl_ssh_pass（单行）。"""

import os


def ssh_password(gps_root: str) -> str:
    p = os.environ.get("FL_SSH_PASS", "").strip()
    if p:
        return p
    for name in ("fl_ssh_pass.txt", ".fl_ssh_pass"):
        path = os.path.join(gps_root, name)
        if os.path.isfile(path):
            with open(path, encoding="utf-8", errors="replace") as f:
                return f.read().strip()
    return ""