mirror of
https://gitlab.com/kupfer/kupferbootstrap.git
synced 2025-02-23 05:35:44 -05:00
562 lines
22 KiB
Python
562 lines
22 KiB
Python
import click
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import logging
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import subprocess
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import os
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import atexit
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from glob import glob
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from shutil import rmtree
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from config import config
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from distro import get_base_distro, RepoInfo
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from shlex import quote as shell_quote
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from utils import mount, umount, check_findmnt, log_or_exception
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from distro import get_kupfer_local
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from wrapper import enforce_wrap
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from constants import Arch, GCC_HOSTSPECS, CROSSDIRECT_PKGS, BASE_PACKAGES
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from generator import generate_makepkg_conf
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BIND_BUILD_DIRS = 'BINDBUILDDIRS'
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BASE_CHROOT_PREFIX = 'base_'
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BUILD_CHROOT_PREFIX = 'build_'
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# inspired by arch-chroot
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# order of these matters!
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BASIC_MOUNTS = {
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'/proc': {
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'src': 'proc',
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'type': 'proc',
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'options': ['nosuid,noexec,nodev']
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},
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'/sys': {
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'src': 'sys',
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'type': 'sysfs',
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'options': ['nosuid,noexec,nodev,ro'],
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},
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'/dev': {
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'src': 'udev',
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'type': 'devtmpfs',
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'options': ['mode=0755,nosuid'],
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},
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'/dev/pts': {
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'src': 'devpts',
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'type': 'devpts',
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'options': ['mode=0620,gid=5,nosuid,noexec'],
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},
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'/dev/shm': {
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'src': 'shm',
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'type': 'tmpfs',
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'options': ['mode=1777,nosuid,nodev'],
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},
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'/run': {
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'src': '/run',
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'type': 'tmpfs',
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'options': ['bind'],
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},
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'/etc/resolv.conf': {
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'src': os.path.realpath('/etc/resolv.conf'),
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'type': None,
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'options': ['bind'],
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},
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}
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Chroot = None
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chroots: dict[str, Chroot] = {}
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def make_abs_path(path: str) -> str:
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"""Simply ensures the path string starts with a '/'. Does no disk modifications!"""
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return '/' + path.lstrip('/')
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def get_chroot_path(chroot_name, override_basepath: str = None) -> str:
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base_path = config.get_path('chroots') if not override_basepath else override_basepath
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return os.path.join(base_path, chroot_name)
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def base_chroot_name(arch: Arch):
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return BASE_CHROOT_PREFIX + arch
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def build_chroot_name(arch: Arch):
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return BUILD_CHROOT_PREFIX + arch
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def get_chroot(
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name: str,
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initialize: bool = False,
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activate: bool = False,
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fail_if_exists: bool = False,
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default: Chroot = None,
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) -> Chroot:
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global chroots
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if default and name not in chroots:
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logging.debug(f'Adding chroot {name} to chroot map')
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chroots[name] = default
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elif fail_if_exists:
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raise Exception(f'chroot {name} already exists')
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chroot = chroots[name]
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if initialize:
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chroot.initialize()
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if activate:
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chroot.activate(fail_if_active=False)
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return chroot
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def get_base_chroot(arch: Arch, **kwargs) -> Chroot:
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name = base_chroot_name(arch)
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default = Chroot(name, arch, initialize=False, copy_base=False)
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if kwargs.pop('initialize', False):
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logging.debug('get_base_chroot: Had to remove "initialize" from args. This indicates a bug.')
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return get_chroot(name, **kwargs, initialize=False, default=default)
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def get_build_chroot(arch: Arch, add_kupfer_repos: bool = True, **kwargs) -> Chroot:
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name = build_chroot_name(arch)
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if 'extra_repos' in kwargs:
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raise Exception('extra_repos!')
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repos = get_kupfer_local(arch).repos if add_kupfer_repos else {}
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default = Chroot(name, arch, initialize=False, copy_base=True, extra_repos=repos)
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chroot = get_chroot(name, **kwargs, default=default)
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chroot.extra_repos = repos
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return chroot
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def get_device_chroot(device: str, flavour: str, arch: Arch, packages: list[str] = BASE_PACKAGES, extra_repos={}, **kwargs) -> Chroot:
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name = f'rootfs_{device}-{flavour}'
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default = Chroot(name, arch, initialize=False, copy_base=False, base_packages=packages, extra_repos=extra_repos)
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return get_chroot(name, **kwargs, default=default)
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class Chroot:
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"""Do not instantiate directly, use get_chroot() externally!"""
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name: str
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full_path: str
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arch: Arch
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initialized: bool = False
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active: bool = False
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active_mounts: list[str] = []
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copy_base: bool = True
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extra_repos: dict[str, RepoInfo] = {}
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base_packages: list[str] = ['base']
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def __repr__(self):
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return f'Chroot({self.name})'
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def __init__(
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self,
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name: str,
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arch: Arch,
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copy_base: bool = None,
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initialize: bool = False,
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extra_repos: dict[str, RepoInfo] = {},
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base_packages: list[str] = ['base', 'base-devel', 'git'],
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path_override: str = None,
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):
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if copy_base is None:
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logging.debug(f'{name}: copy_base is none!')
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copy_base = (name == base_chroot_name(arch))
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self.name = name
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self.arch = arch
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self.path = os.path.join(config.get_path('chroots'), name) if not path_override else path_override
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self.copy_base = copy_base
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self.extra_repos |= extra_repos
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self.base_packages = base_packages
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if initialize:
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self.initialize()
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# TODO: when we go multithreaded, activate() and initialize() probably need a reader-writer lock
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def get_path(self, *joins) -> str:
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if joins:
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joins = (joins[0].lstrip('/'),) + joins[1:]
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return os.path.join(self.path, *joins)
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def initialize(
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self,
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reset: bool = False,
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fail_if_initialized: bool = False,
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):
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pacman_conf_target = self.get_path('etc/pacman.conf')
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if self.initialized and not reset:
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# chroot must have been initialized already!
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if fail_if_initialized:
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raise Exception(f"Chroot {self.name} is already initialized, this seems like a bug")
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return
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active_previously = self.active
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self.deactivate_core()
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if self.copy_base:
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if reset or not os.path.exists(self.get_path('usr/bin')):
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base_chroot = get_base_chroot(self.arch)
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if base_chroot == self:
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raise Exception('base_chroot == self, bailing out. this is a bug')
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base_chroot.initialize()
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logging.info(f'Copying {base_chroot.name} chroot to {self.name}')
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result = subprocess.run([
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'rsync',
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'-a',
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'--delete',
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'-q',
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'-W',
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'-x',
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'--exclude',
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'pkgbuilds',
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'--exclude',
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'prebuilts',
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f'{base_chroot.path}/',
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f'{self.path}/',
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])
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if result.returncode != 0:
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raise Exception(f'Failed to copy {base_chroot.name} to {self.name}')
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else:
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logging.debug(f'{self.name}: Reusing existing installation')
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if set(get_kupfer_local(self.arch).repos).intersection(set(self.extra_repos)):
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self.mount_packages()
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self.mount_pacman_cache()
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self.write_pacman_conf()
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self.initialized = True
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self.activate()
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self.try_install_packages(self.base_packages, refresh=True, allow_fail=False)
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self.deactivate_core()
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# patch makepkg
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with open(self.get_path('/usr/bin/makepkg'), 'r') as file:
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data = file.read()
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data = data.replace('EUID == 0', 'EUID == -1')
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with open(self.get_path('/usr/bin/makepkg'), 'w') as file:
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file.write(data)
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# configure makepkg
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self.write_makepkg_conf(self.arch, cross_chroot_relative=None, cross=False)
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if active_previously:
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self.activate()
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else:
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# base chroot
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if reset:
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logging.info(f'Resetting {self.name}')
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for dir in glob(os.join(self.path, '*')):
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rmtree(dir)
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self.write_pacman_conf()
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self.mount_pacman_cache()
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logging.info(f'Pacstrapping chroot {self.name}: {", ".join(self.base_packages)}')
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result = subprocess.run([
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'pacstrap',
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'-C',
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pacman_conf_target,
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'-c',
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'-G',
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self.path,
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] + self.base_packages + [
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'--needed',
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'--overwrite=*',
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'-yyuu',
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])
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if result.returncode != 0:
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raise Exception(f'Failed to initialize chroot "{self.name}"')
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self.initialized = True
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def mount(
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self,
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absolute_source: str,
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relative_destination: str,
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options=['bind'],
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fs_type: str = None,
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fail_if_mounted: bool = True,
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makedir: bool = True,
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strict_cache_consistency: bool = False,
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):
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"""returns the absolute path `relative_target` was mounted at"""
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def log_or_exc(msg):
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log_or_exception(strict_cache_consistency, msg, log_level=logging.ERROR)
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relative_destination = relative_destination.lstrip('/')
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absolute_destination = self.get_path(relative_destination)
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pseudo_absolute = make_abs_path(relative_destination)
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if check_findmnt(absolute_destination):
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if pseudo_absolute not in self.active_mounts:
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raise Exception(f'{self.name}: We leaked the mount for {pseudo_absolute} ({absolute_destination}).')
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elif fail_if_mounted:
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raise Exception(f'{self.name}: {absolute_destination} is already mounted')
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logging.debug(f'{self.name}: {absolute_destination} already mounted. Skipping.')
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else:
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if pseudo_absolute in self.active_mounts:
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log_or_exc(f'{self.name}: Mount {pseudo_absolute} was in active_mounts but not actually mounted. ({absolute_destination})')
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if makedir and os.path.isdir(absolute_source):
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os.makedirs(absolute_destination, exist_ok=True)
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result = mount(absolute_source, absolute_destination, options=options, fs_type=fs_type, register_unmount=False)
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if result.returncode != 0:
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raise Exception(f'{self.name}: failed to mount {absolute_source} to {absolute_destination}')
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logging.debug(f'{self.name}: {absolute_source} successfully mounted to {absolute_destination}.')
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self.active_mounts += [pseudo_absolute]
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atexit.register(self.deactivate)
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return absolute_destination
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def umount(self, relative_path: str):
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if not self:
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return
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path = self.get_path(relative_path)
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result = umount(path)
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if result.returncode == 0 and make_abs_path(relative_path) in self.active_mounts:
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self.active_mounts.remove(relative_path)
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return result
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def umount_many(self, relative_paths: list[str]):
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# make sure paths start with '/'. Important: also copies the collection and casts to list, which will be sorted!
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mounts = [make_abs_path(path) for path in relative_paths]
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mounts.sort(reverse=True)
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for mount in mounts:
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if mount == '/proc':
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continue
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self.umount(mount)
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if '/proc' in mounts:
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self.umount('/proc')
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def activate(self, fail_if_active: bool = False):
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"""mount /dev, /sys and /proc"""
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if self.active and fail_if_active:
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raise Exception(f'chroot {self.name} already active!')
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if not self.initialized:
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self.initialize(fail_if_initialized=False)
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for dst, opts in BASIC_MOUNTS.items():
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self.mount(opts['src'], dst, fs_type=opts['type'], options=opts['options'], fail_if_mounted=fail_if_active)
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self.active = True
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def deactivate_core(self):
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self.umount_many(BASIC_MOUNTS.keys())
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# TODO: so this is a weird one. while the basic bind-mounts get unmounted
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# additional mounts like crossdirect are intentionally left intact. Is such a chroot still `active` afterwards?
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self.active = False
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def deactivate(self, fail_if_inactive: bool = False):
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if not self.active:
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if fail_if_inactive:
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raise Exception(f"Chroot {self.name} not activated, can't deactivate!")
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self.umount_many(self.active_mounts)
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self.active = False
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def run_cmd(self,
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script: str,
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inner_env: dict[str, str] = {},
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outer_env: dict[str, str] = os.environ.copy() | {'QEMU_LD_PREFIX': '/usr/aarch64-linux-gnu'},
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attach_tty: str = False,
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capture_output: str = False,
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cwd: str = None,
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fail_inactive: bool = True,
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stdout=None) -> subprocess.CompletedProcess:
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if not self.active and fail_inactive:
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raise Exception(f'Chroot {self.name} is inactive, not running command! Hint: pass `fail_inactive=False`')
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if outer_env is None:
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outer_env = os.environ.copy()
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env_cmd = ['/usr/bin/env'] + [f'{shell_quote(key)}={shell_quote(value)}' for key, value in inner_env.items()]
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run_func = subprocess.call if attach_tty else subprocess.run
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kwargs = {
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'env': outer_env,
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}
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if not attach_tty:
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kwargs |= {'stdout': stdout} if stdout else {'capture_output': capture_output}
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if not isinstance(script, str) and isinstance(script, list):
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script = ' '.join(script)
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if cwd:
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script = f"cd {shell_quote(cwd)} && ( {script} )"
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cmd = ['chroot', self.path] + env_cmd + [
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'/bin/bash',
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'-c',
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script,
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]
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logging.debug(f'{self.name}: Running cmd: "{cmd}"')
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result = run_func(cmd, **kwargs)
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return result
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def create_user(
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self,
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user='kupfer',
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password='123456',
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groups=['network', 'video', 'audio', 'optical', 'storage', 'input', 'scanner', 'games', 'lp', 'rfkill', 'wheel'],
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):
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install_script = f'''
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set -e
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if ! id -u "{user}" >/dev/null 2>&1; then
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useradd -m {user}
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fi
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usermod -a -G {",".join(groups)} {user}
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chown {user}:{user} /home/{user} -R
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'''
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if password:
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install_script += f'echo "{user}:{password}" | chpasswd'
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else:
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install_script += 'echo "Set user password:" && passwd'
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result = self.run_cmd(install_script)
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if result.returncode != 0:
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raise Exception('Failed to setup user')
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def try_install_packages(self, packages: list[str], refresh: bool = False, allow_fail: bool = True) -> dict[str, subprocess.CompletedProcess]:
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"""Try installing packages, fall back to installing one by one"""
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results = {}
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if refresh:
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results['refresh'] = self.run_cmd('pacman -Syy --noconfirm')
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cmd = 'pacman -S --noconfirm --needed'
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result = self.run_cmd(f'{cmd} -y {" ".join(packages)}')
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results |= {package: result for package in packages}
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if result.returncode != 0 and allow_fail:
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results = {}
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logging.debug('Falling back to serial installation')
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for pkg in set(packages):
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# Don't check for errors here because there might be packages that are listed as dependencies but are not available on x86_64
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results[pkg] = self.run_cmd(f'{cmd} {pkg}')
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return results
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def mount_rootfs(self, source_path: str, fs_type: str = None, options: list[str] = ['loop'], allow_overlay: bool = False):
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if self.active:
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raise Exception(f'{self.name}: Chroot is marked as active, not mounting a rootfs over it.')
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if not os.path.exists(source_path):
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raise Exception('Source does not exist')
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if not allow_overlay:
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if self.active_mounts:
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raise Exception(f'{self.name}: Chroot has submounts active: {self.active_mounts}')
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if os.path.ismount(self.path):
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raise Exception(f'{self.name}: There is already something mounted at {self.path}, not mounting over it.')
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if os.path.exists(os.path.join(self.path, 'usr/bin')):
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raise Exception(f'{self.name}: {self.path}/usr/bin exists, not mounting over existing rootfs.')
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os.makedirs(self.path, exist_ok=True)
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atexit.register(self.deactivate)
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self.mount(source_path, '/', fs_type=fs_type, options=options)
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def mount_crossdirect(self, native_chroot: Chroot = None, fail_if_mounted: bool = False):
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"""
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mount `native_chroot` at `target_chroot`/native
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returns the absolute path that `native_chroot` has been mounted at.
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"""
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target_arch = self.arch
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if not native_chroot:
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native_chroot = get_build_chroot(config.runtime['arch'])
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host_arch = native_chroot.arch
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hostspec = GCC_HOSTSPECS[host_arch][target_arch]
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cc = f'{hostspec}-cc'
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gcc = f'{hostspec}-gcc'
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native_mount = os.path.join(self.path, 'native')
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logging.debug(f'Activating crossdirect in {native_mount}')
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results = native_chroot.try_install_packages(CROSSDIRECT_PKGS + [gcc], refresh=True, allow_fail=False)
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if results[gcc].returncode != 0:
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logging.debug('Failed to install cross-compiler package {gcc}')
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if results['crossdirect'].returncode != 0:
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raise Exception('Failed to install crossdirect')
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cc_path = os.path.join(native_chroot.path, 'usr', 'bin', cc)
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target_lib_dir = os.path.join(self.path, 'lib64')
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# TODO: crosscompiler weirdness, find proper fix for /include instead of /usr/include
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target_include_dir = os.path.join(self.path, 'include')
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for target, source in {cc_path: gcc, target_lib_dir: 'lib', target_include_dir: 'usr/include'}.items():
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if not os.path.exists(target):
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logging.debug(f'Symlinking {source} at {target}')
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os.symlink(source, target)
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ld_so = os.path.basename(glob(f"{os.path.join(native_chroot.path, 'usr', 'lib', 'ld-linux-')}*")[0])
|
|
ld_so_target = os.path.join(target_lib_dir, ld_so)
|
|
if not os.path.islink(ld_so_target):
|
|
os.symlink(os.path.join('/native', 'usr', 'lib', ld_so), ld_so_target)
|
|
else:
|
|
logging.debug(f'ld-linux.so symlink already exists, skipping for {self.name}')
|
|
|
|
# TODO: find proper fix
|
|
rustc = os.path.join(native_chroot.path, 'usr/lib/crossdirect', target_arch, 'rustc')
|
|
if os.path.exists(rustc):
|
|
logging.debug('Disabling crossdirect rustc')
|
|
os.unlink(rustc)
|
|
|
|
os.makedirs(native_mount, exist_ok=True)
|
|
logging.debug(f'Mounting {native_chroot.name} to {native_mount}')
|
|
self.mount(native_chroot.path, 'native', fail_if_mounted=fail_if_mounted)
|
|
return native_mount
|
|
|
|
def mount_pkgbuilds(self, fail_if_mounted: bool = False) -> str:
|
|
pkgbuilds = config.get_path('pkgbuilds')
|
|
return self.mount(absolute_source=pkgbuilds, relative_destination=pkgbuilds.lstrip('/'), fail_if_mounted=fail_if_mounted)
|
|
|
|
def mount_pacman_cache(self, fail_if_mounted: bool = False) -> str:
|
|
arch_cache = os.path.join(config.get_path('pacman'), self.arch)
|
|
rel_target = os.path.join('var/cache/pacman', self.arch)
|
|
for dir in [arch_cache, self.get_path(rel_target)]:
|
|
os.makedirs(dir, exist_ok=True)
|
|
return self.mount(arch_cache, rel_target, fail_if_mounted=fail_if_mounted)
|
|
|
|
def mount_packages(self, fail_if_mounted: bool = False) -> str:
|
|
packages = config.get_path('packages')
|
|
return self.mount(absolute_source=packages, relative_destination=packages.lstrip('/'), fail_if_mounted=fail_if_mounted)
|
|
|
|
def mount_crosscompile(self, foreign_chroot: Chroot):
|
|
mount_dest = os.path.join('chroot', os.path.basename(foreign_chroot.path))
|
|
os.makedirs(os.path.join(self.path, mount_dest), exist_ok=True)
|
|
return self.mount(absolute_source=foreign_chroot.path, relative_destination=mount_dest)
|
|
|
|
def write_makepkg_conf(self, target_arch: Arch, cross_chroot_relative: str, cross: bool = True) -> str:
|
|
"""
|
|
Generate a `makepkg.conf` or `makepkg_cross_$arch.conf` file in /etc.
|
|
If `cross` is set makepkg will be configured to crosscompile for the foreign chroot at `cross_chroot_relative`
|
|
Returns the relative (to `self.path`) path to the written file, e.g. `etc/makepkg_cross_aarch64.conf`.
|
|
"""
|
|
makepkg_cross_conf = generate_makepkg_conf(target_arch, cross=cross, chroot=cross_chroot_relative)
|
|
filename = 'makepkg' + (f'_cross_{target_arch}' if cross else '') + '.conf'
|
|
makepkg_conf_path_relative = os.path.join('etc', filename)
|
|
makepkg_conf_path = os.path.join(self.path, makepkg_conf_path_relative)
|
|
with open(makepkg_conf_path, 'w') as f:
|
|
f.write(makepkg_cross_conf)
|
|
return makepkg_conf_path_relative
|
|
|
|
def write_pacman_conf(self):
|
|
os.makedirs(self.get_path('/etc'), exist_ok=True)
|
|
conf_text = get_base_distro(self.arch).get_pacman_conf(self.extra_repos)
|
|
with open(self.get_path('etc/pacman.conf'), 'w') as file:
|
|
file.write(conf_text)
|
|
|
|
|
|
@click.command('chroot')
|
|
@click.argument('type', required=False, default='build')
|
|
@click.argument('arch', required=False, default=None)
|
|
def cmd_chroot(type: str = 'build', arch: str = None, enable_crossdirect=True):
|
|
chroot_path = ''
|
|
if type not in ['base', 'build', 'rootfs']:
|
|
raise Exception('Unknown chroot type: ' + type)
|
|
|
|
enforce_wrap()
|
|
if type == 'rootfs':
|
|
if arch:
|
|
name = 'rootfs_' + arch
|
|
else:
|
|
raise Exception('"rootfs" without args not yet implemented, sorry!')
|
|
# TODO: name = config.get_profile()[...]
|
|
chroot_path = os.path.join(config.get_path('chroots'), name)
|
|
if not os.path.exists(chroot_path):
|
|
raise Exception(f"rootfs {name} doesn't exist")
|
|
else:
|
|
if not arch:
|
|
#TODO: arch = config.get_profile()[...]
|
|
arch = 'aarch64'
|
|
if type == 'base':
|
|
chroot = get_build_chroot(arch)
|
|
if not os.path.exists(os.path.join(chroot.path, 'bin')):
|
|
chroot.init()
|
|
chroot.initialized = True
|
|
elif type == 'build':
|
|
chroot = get_build_chroot(arch)
|
|
if not os.path.exists(os.path.join(chroot.path, 'bin')):
|
|
chroot.init()
|
|
chroot.initialized = True
|
|
if config.file['build']['crossdirect'] and enable_crossdirect:
|
|
chroot.mount_crossdirect()
|
|
else:
|
|
raise Exception('Really weird bug')
|
|
|
|
logging.debug(f'Starting shell in {chroot.name}:')
|
|
chroot.run_cmd('bash', attach_tty=True)
|