#!/usr/bin/env python3
# SPDX-License-Identifier: MPL-2.0
"""Small helpers for keeping inherited Android boot flags out of Vulpes."""


def remove_parameters(cmdline, names):
    """Return (cleaned_cmdline, removed_tokens) for exact kernel parameter names."""
    names = set(names)
    kept = []
    removed = []
    for token in cmdline.split():
        if token.split('=', 1)[0] in names:
            removed.append(token)
        else:
            kept.append(token)
    return ' '.join(kept), removed


def vulpes_cmdline(cmdline):
    # This Qualcomm cpuidle parameter disables every selectable low-power
    # level. It is inherited from Android and must not disable Vulpes CPU idle.
    return remove_parameters(cmdline, {'lpm_levels.sleep_disabled'})