mirror of
https://gitlab.com/kupfer/kupferbootstrap.git
synced 2025-02-23 21:55:43 -05:00
2ece1f288c
with check_space=True, build chroots fail to pacman -S anything, because their rootfs is not a mountpoint, hence pacman's space calculations will fail and return not enough free space. We do want these space checks when pacstrapping device rootfilesystems though.
590 lines
23 KiB
Python
590 lines
23 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, get_kupfer_local, 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 wrapper import enforce_wrap
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from constants import Arch, GCC_HOSTSPECS, CROSSDIRECT_PKGS, BASE_PACKAGES, CHROOT_PATHS
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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 = path_override or os.path.join(config.get_path('chroots'), name)
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self.copy_base = copy_base
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self.extra_repos = extra_repos.copy()
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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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if self.name.startswith(BASE_CHROOT_PREFIX) and set(get_kupfer_local(self.arch).repos).intersection(set(self.extra_repos)):
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raise Exception(f'Base chroot {self.name} had local repos specified: {self.extra_repos}')
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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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CHROOT_PATHS['pkgbuilds'].strip('/'),
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'--exclude',
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CHROOT_PATHS['packages'].strip('/'),
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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.path.join(self.path, '*')):
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rmtree(dir)
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self.write_pacman_conf(check_space=True)
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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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user = user or 'kupfer'
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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 += f'echo "Set user password:" && passwd {user}'
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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 --overwrite='/*'"
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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] = [], 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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really_active = []
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for mnt in self.active_mounts:
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if check_findmnt(self.get_path(mnt)):
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really_active.append(mnt)
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if really_active:
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raise Exception(f'{self.name}: Chroot has submounts active: {really_active}')
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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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native_chroot.initialize()
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native_chroot.mount_pacman_cache()
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native_chroot.mount_packages()
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native_chroot.activate()
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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:
|
|
logging.debug('Failed to install cross-compiler package {gcc}')
|
|
if results['crossdirect'].returncode != 0:
|
|
raise Exception('Failed to install crossdirect')
|
|
|
|
cc_path = os.path.join(native_chroot.path, 'usr', 'bin', cc)
|
|
target_lib_dir = os.path.join(self.path, 'lib64')
|
|
# TODO: crosscompiler weirdness, find proper fix for /include instead of /usr/include
|
|
target_include_dir = os.path.join(self.path, 'include')
|
|
|
|
for target, source in {cc_path: gcc, target_lib_dir: 'lib', target_include_dir: 'usr/include'}.items():
|
|
if not os.path.exists(target):
|
|
logging.debug(f'Symlinking {source} at {target}')
|
|
os.symlink(source, target)
|
|
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:
|
|
return self.mount(
|
|
absolute_source=config.get_path('pkgbuilds'),
|
|
relative_destination=CHROOT_PATHS['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(CHROOT_PATHS['pacman'].lstrip('/'), 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:
|
|
return self.mount(
|
|
absolute_source=config.get_path('packages'),
|
|
relative_destination=CHROOT_PATHS['packages'].lstrip('/'),
|
|
fail_if_mounted=fail_if_mounted,
|
|
)
|
|
|
|
def mount_crosscompile(self, foreign_chroot: Chroot, fail_if_mounted: bool = False):
|
|
mount_dest = os.path.join(CHROOT_PATHS['chroots'].lstrip('/'), os.path.basename(foreign_chroot.path))
|
|
return self.mount(
|
|
absolute_source=foreign_chroot.path,
|
|
relative_destination=mount_dest,
|
|
fail_if_mounted=fail_if_mounted,
|
|
)
|
|
|
|
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, check_space: bool = False):
|
|
os.makedirs(self.get_path('/etc'), exist_ok=True)
|
|
conf_text = get_base_distro(self.arch).get_pacman_conf(self.extra_repos, check_space=check_space)
|
|
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):
|
|
"""Open a shell in a chroot"""
|
|
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_base_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, activate=True)
|
|
if not os.path.exists(os.path.join(chroot.path, 'bin')):
|
|
chroot.init()
|
|
chroot.initialized = True
|
|
chroot.mount_pkgbuilds()
|
|
if config.file['build']['crossdirect'] and enable_crossdirect:
|
|
chroot.mount_crossdirect()
|
|
else:
|
|
raise Exception('Really weird bug')
|
|
|
|
chroot.activate()
|
|
logging.debug(f'Starting shell in {chroot.name}:')
|
|
chroot.run_cmd('bash', attach_tty=True)
|