forked from Mirror/pmbootstrap
9b7feadca6
Move code to install Alpine and postmarketOS keys into its own function, so it can be called outside of pmb.chroot.init too (next patch). Describe why this is needed in the first place and, while at it, tweak the function to only copy the key if it does not exist in the target directory.
129 lines
4.8 KiB
Python
129 lines
4.8 KiB
Python
# Copyright 2021 Oliver Smith
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# SPDX-License-Identifier: GPL-3.0-or-later
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import logging
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import os
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import glob
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import filecmp
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import pmb.chroot
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import pmb.chroot.apk_static
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import pmb.config
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import pmb.config.workdir
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import pmb.helpers.repo
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import pmb.helpers.run
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import pmb.parse.arch
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def copy_resolv_conf(args, suffix="native"):
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"""
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Use pythons super fast file compare function (due to caching)
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and copy the /etc/resolv.conf to the chroot, in case it is
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different from the host.
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If the file doesn't exist, create an empty file with 'touch'.
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"""
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host = "/etc/resolv.conf"
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chroot = f"{args.work}/chroot_{suffix}{host}"
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if os.path.exists(host):
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if not os.path.exists(chroot) or not filecmp.cmp(host, chroot):
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pmb.helpers.run.root(args, ["cp", host, chroot])
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else:
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pmb.helpers.run.root(args, ["touch", chroot])
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def mark_in_chroot(args, suffix="native"):
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"""
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Touch a flag so we can know when we're running in chroot (and
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don't accidentally flash partitions on our host). This marker
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gets removed in pmb.chroot.shutdown (pmbootstrap shutdown).
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"""
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in_chroot_file = f"{args.work}/chroot_{suffix}/in-pmbootstrap"
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if not os.path.exists(in_chroot_file):
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pmb.helpers.run.root(args, ["touch", in_chroot_file])
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def setup_qemu_emulation(args, suffix):
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arch = pmb.parse.arch.from_chroot_suffix(args, suffix)
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if not pmb.parse.arch.cpu_emulation_required(args, arch):
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return
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chroot = f"{args.work}/chroot_{suffix}"
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arch_qemu = pmb.parse.arch.alpine_to_qemu(arch)
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# mount --bind the qemu-user binary
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pmb.chroot.binfmt.register(args, arch)
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pmb.helpers.mount.bind_file(args, f"{args.work}/chroot_native"
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f"/usr/bin/qemu-{arch_qemu}",
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f"{chroot}/usr/bin/qemu-{arch_qemu}-static",
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create_folders=True)
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def init_keys(args):
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"""
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All Alpine and postmarketOS repository keys are shipped with pmbootstrap.
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Copy them into $WORK/config_apk_keys, which gets mounted inside the various
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chroots as /etc/apk/keys.
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This is done before installing any package, so apk can verify APKINDEX
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files of binary repositories even though alpine-keys/postmarketos-keys are
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not installed yet.
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"""
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for key in glob.glob(f"{pmb.config.apk_keys_path}/*.pub"):
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target = f"{args.work}/config_apk_keys/{os.path.basename(key)}"
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if not os.path.exists(target):
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# Copy as root, so the resulting files in chroots are owned by root
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pmb.helpers.run.root(args, ["cp", key, target])
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def init(args, suffix="native"):
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# When already initialized: just prepare the chroot
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chroot = f"{args.work}/chroot_{suffix}"
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arch = pmb.parse.arch.from_chroot_suffix(args, suffix)
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pmb.chroot.mount(args, suffix)
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setup_qemu_emulation(args, suffix)
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mark_in_chroot(args, suffix)
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if os.path.islink(f"{chroot}/bin/sh"):
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pmb.config.workdir.chroot_check_channel(args, suffix)
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copy_resolv_conf(args, suffix)
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pmb.chroot.apk.update_repository_list(args, suffix)
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return
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# Require apk-tools-static
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pmb.chroot.apk_static.init(args)
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logging.info(f"({suffix}) install alpine-base")
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# Initialize cache
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apk_cache = f"{args.work}/cache_apk_{arch}"
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pmb.helpers.run.root(args, ["ln", "-s", "-f", "/var/cache/apk",
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f"{chroot}/etc/apk/cache"])
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# Initialize /etc/apk/keys/, resolv.conf, repositories
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init_keys(args)
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copy_resolv_conf(args, suffix)
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pmb.chroot.apk.update_repository_list(args, suffix)
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pmb.config.workdir.chroot_save_init(args, suffix)
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# Install alpine-base
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pmb.helpers.repo.update(args, arch)
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pmb.chroot.apk_static.run(args, ["--root", chroot,
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"--cache-dir", apk_cache,
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"--initdb", "--arch", arch,
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"add", "alpine-base"])
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# Building chroots: create "pmos" user, add symlinks to /home/pmos
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if not suffix.startswith("rootfs_"):
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pmb.chroot.root(args, ["adduser", "-D", "pmos", "-u",
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pmb.config.chroot_uid_user],
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suffix, auto_init=False)
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# Create the links (with subfolders if necessary)
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for target, link_name in pmb.config.chroot_home_symlinks.items():
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link_dir = os.path.dirname(link_name)
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if not os.path.exists(f"{chroot}{link_dir}"):
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pmb.chroot.user(args, ["mkdir", "-p", link_dir], suffix)
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if not os.path.exists(f"{chroot}{target}"):
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pmb.chroot.root(args, ["mkdir", "-p", target], suffix)
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pmb.chroot.user(args, ["ln", "-s", target, link_name], suffix)
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pmb.chroot.root(args, ["chown", "pmos:pmos", target], suffix)
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