forked from Mirror/pmbootstrap
0f371e426f
* New "pmbootstrap build --src=/local/source/path hello-world" syntax * The local source path gets mounted inside the chroot * From there, a copy of the source code gets created with rsync (so we can write into the source folder if necessary, for better compatibility with all kinds of APKBUILDs) * After the aport gets copied into the chroot before building (as usually), we extend the APKBUILD with overrides to make it use mountpoint's source instead of downloading the package's source from the web as usually * The package built with the local source gets _pYYYYMMDDHHMMSS appended to the pkgver * linux-postmarketos-mainline: use $builddir, fix patch checksum
119 lines
3.8 KiB
Python
119 lines
3.8 KiB
Python
"""
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Copyright 2018 Oliver Smith
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This file is part of pmbootstrap.
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pmbootstrap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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pmbootstrap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with pmbootstrap. If not, see <http://www.gnu.org/licenses/>.
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"""
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import os
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import pmb.helpers.run
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def ismount(folder):
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"""
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Ismount() implementation, that works for mount --bind.
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Workaround for: https://bugs.python.org/issue29707
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"""
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folder = os.path.realpath(os.path.realpath(folder))
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with open("/proc/mounts", "r") as handle:
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for line in handle:
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words = line.split()
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if len(words) >= 2 and words[1] == folder:
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return True
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if words[0] == folder:
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return True
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return False
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def bind(args, source, destination, create_folders=True, umount=False):
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"""
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Mount --bind a folder and create necessary directory structure.
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:param umount: when destination is already a mount point, umount it first.
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"""
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# Check/umount destination
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if ismount(destination):
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if umount:
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umount_all(args, destination)
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else:
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return
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# Check/create folders
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for path in [source, destination]:
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if os.path.exists(path):
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continue
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if create_folders:
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pmb.helpers.run.root(args, ["mkdir", "-p", path])
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else:
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raise RuntimeError("Mount failed, folder does not exist: " +
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path)
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# Actually mount the folder
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pmb.helpers.run.root(args, ["mount", "--bind", source, destination])
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# Verify, that it has worked
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if not ismount(destination):
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raise RuntimeError("Mount failed: " + source + " -> " + destination)
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def bind_blockdevice(args, source, destination):
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"""
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Mount a blockdevice with the --bind option, and create the destination
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file, if necessary.
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"""
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# Skip existing mountpoint
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if ismount(destination):
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return
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# Create empty file
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if not os.path.exists(destination):
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pmb.helpers.run.root(args, ["touch", destination])
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# Mount
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pmb.helpers.run.root(args, ["mount", "--bind", source,
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destination])
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def umount_all_list(prefix, source="/proc/mounts"):
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"""
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Parses `/proc/mounts` for all folders beginning with a prefix.
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:source: can be changed for testcases
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:returns: a list of folders, that need to be umounted
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"""
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ret = []
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prefix = os.path.realpath(prefix)
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with open(source, "r") as handle:
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for line in handle:
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words = line.split()
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if len(words) < 2:
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raise RuntimeError("Failed to parse line in " + source + ": " +
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line)
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mountpoint = words[1]
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if mountpoint.startswith(prefix):
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# Remove "\040(deleted)" suffix (#545)
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deleted_str = r"\040(deleted)"
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if mountpoint.endswith(deleted_str):
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mountpoint = mountpoint[:-len(deleted_str)]
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ret.append(mountpoint)
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ret.sort(reverse=True)
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return ret
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def umount_all(args, folder):
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"""
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Umount all folders, that are mounted inside a given folder.
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"""
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for mountpoint in umount_all_list(folder):
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pmb.helpers.run.root(args, ["umount", mountpoint])
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if ismount(mountpoint):
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raise RuntimeError("Failed to umount: " + mountpoint)
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