mirror of
https://gitlab.postmarketos.org/postmarketOS/pmbootstrap.git
synced 2025-07-13 11:29:46 +03:00
9f8edf539d
Introduce a new "cache" subdirectory in the pmbootstrap workdir, all the cache and config bits go in here, anything that needs to be accessible from inside a chroot. The whole dir is then bind-mounted into the chroot as /cache with appropriate symlinks. This dir is in the config as config.cache. In addition, all the cache_* and other config dirs are renamed to be closer to the names of the equivalent dirs in the chroot (e.g. abuild-config) and to avoid redundant naming since they are now under a "cache" dir. Signed-off-by: Casey Connolly <kcxt@postmarketos.org>
105 lines
3.5 KiB
Python
105 lines
3.5 KiB
Python
# Copyright 2023 Oliver Smith
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# SPDX-License-Identifier: GPL-3.0-or-later
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from pmb.core.pkgrepo import pkgrepo_default_path
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from pmb.helpers import logging
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import os
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from pathlib import Path
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import pmb.chroot.binfmt
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import pmb.config
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import pmb.helpers.run
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import pmb.helpers.mount
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from pmb.core import Chroot
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from pmb.core.context import get_context
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from pmb.init import sandbox
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def mount_dev_tmpfs(chroot: Chroot = Chroot.native()) -> None:
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"""
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Mount tmpfs inside the chroot's dev folder to make sure we can create
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device nodes, even if the filesystem of the work folder does not support
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it.
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"""
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# Do nothing when it is already mounted
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# dev = chroot / "dev"
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# if pmb.helpers.mount.ismount(dev):
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# return
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logging.info(f"mount_dev_tmpfs({chroot})")
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# Use sandbox to set up /dev inside the chroot
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ttyname = os.ttyname(2) if os.isatty(2) else ""
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devop = sandbox.DevOperation(ttyname, "/dev")
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devop.execute("/", str(chroot.path))
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def mount(chroot: Chroot):
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# Mount tmpfs as the chroot's /dev
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chroot.path.mkdir(exist_ok=True)
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mount_dev_tmpfs(chroot)
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# Get all mountpoints
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arch = chroot.arch
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channel = pmb.config.pmaports.read_config(pkgrepo_default_path())["channel"]
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mountpoints: dict[Path, Path] = {}
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for src_template, target_template in pmb.config.chroot_mount_bind.items():
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src_template = src_template.replace("$CACHE", os.fspath(get_context().config.cache))
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src_template = src_template.replace("$ARCH", str(arch))
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src_template = src_template.replace("$CHANNEL", channel)
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mountpoints[Path(src_template).resolve()] = Path(target_template)
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# Mount if necessary
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for source, target in mountpoints.items():
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target_outer = chroot / target
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if not pmb.helpers.mount.ismount(target_outer):
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pmb.helpers.mount.bind(source, target_outer)
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# Set up binfmt
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if not arch.cpu_emulation_required():
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return
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arch_qemu = arch.qemu()
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# mount --bind the qemu-user binary
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pmb.chroot.binfmt.register(arch)
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pmb.helpers.mount.bind_file(
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Chroot.native() / f"usr/bin/qemu-{arch_qemu}",
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chroot / f"usr/bin/qemu-{arch_qemu}-static",
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create_folders=True,
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)
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def mount_native_into_foreign(chroot: Chroot) -> None:
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source = Chroot.native().path
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target = chroot / "native"
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pmb.helpers.mount.bind(source, target)
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musl = next(source.glob("lib/ld-musl-*.so.1")).name
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musl_link = chroot / "lib" / musl
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if not musl_link.is_symlink():
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pmb.helpers.run.root(["ln", "-s", "/native/lib/" + musl, musl_link])
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# pmb.helpers.run.root(["ln", "-sf", "/native/usr/bin/pigz", "/usr/local/bin/pigz"])
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def remove_mnt_pmbootstrap(chroot: Chroot) -> None:
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"""Safely remove /cache directories from the chroot, without
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running rm -r as root and potentially removing data inside the
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mountpoint in case it was still mounted (bug in pmbootstrap, or user
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ran pmbootstrap 2x in parallel). This is similar to running 'rm -r -d',
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but we don't assume that the host's rm has the -d flag (busybox does
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not)."""
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mnt_dir = chroot / "work"
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if not mnt_dir.exists():
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return
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for path in [*mnt_dir.glob("*"), mnt_dir]:
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path.rmdir()
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if mnt_dir.exists():
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raise RuntimeError("Failed to remove /cache!")
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def umount(chroot: Chroot) -> None:
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"""Unmount all bind mounts inside a chroot."""
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if chroot.path.exists():
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pmb.helpers.mount.umount_all(chroot.path)
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