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310 lines
10 KiB
310 lines
10 KiB
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Copyright 2010 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Script to enter the ChromeOS chroot with mounted sources.
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This script enters the chroot with mounted sources.
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"""
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from __future__ import print_function
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__author__ = 'asharif@google.com (Ahmad Sharif)'
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import argparse
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import getpass
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import os
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import pwd
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import sys
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from cros_utils import command_executer
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from cros_utils import logger
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from cros_utils import misc
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class MountPoint(object):
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"""Mount point class"""
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def __init__(self, external_dir, mount_dir, owner, options=None):
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self.external_dir = os.path.realpath(external_dir)
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self.mount_dir = os.path.realpath(mount_dir)
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self.owner = owner
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self.options = options
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def CreateAndOwnDir(self, dir_name):
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retv = 0
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if not os.path.exists(dir_name):
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command = 'mkdir -p ' + dir_name
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command += ' || sudo mkdir -p ' + dir_name
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retv = command_executer.GetCommandExecuter().RunCommand(command)
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if retv != 0:
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return retv
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pw = pwd.getpwnam(self.owner)
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if os.stat(dir_name).st_uid != pw.pw_uid:
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command = 'sudo chown -f ' + self.owner + ' ' + dir_name
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retv = command_executer.GetCommandExecuter().RunCommand(command)
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return retv
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def DoMount(self):
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ce = command_executer.GetCommandExecuter()
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mount_signature = '%s on %s' % (self.external_dir, self.mount_dir)
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command = 'mount'
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retv, out, _ = ce.RunCommandWOutput(command)
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if mount_signature not in out:
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retv = self.CreateAndOwnDir(self.mount_dir)
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logger.GetLogger().LogFatalIf(retv, 'Cannot create mount_dir!')
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retv = self.CreateAndOwnDir(self.external_dir)
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logger.GetLogger().LogFatalIf(retv, 'Cannot create external_dir!')
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retv = self.MountDir()
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logger.GetLogger().LogFatalIf(retv, 'Cannot mount!')
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return retv
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else:
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return 0
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def UnMount(self):
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ce = command_executer.GetCommandExecuter()
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return ce.RunCommand('sudo umount %s' % self.mount_dir)
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def MountDir(self):
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command = 'sudo mount --bind ' + self.external_dir + ' ' + self.mount_dir
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if self.options == 'ro':
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command += ' && sudo mount --bind -oremount,ro ' + self.mount_dir
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retv = command_executer.GetCommandExecuter().RunCommand(command)
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return retv
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def __str__(self):
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ret = ''
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ret += self.external_dir + '\n'
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ret += self.mount_dir + '\n'
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if self.owner:
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ret += self.owner + '\n'
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if self.options:
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ret += self.options + '\n'
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return ret
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def Main(argv, return_output=False):
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"""The main function."""
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parser = argparse.ArgumentParser()
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parser.add_argument(
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'-c',
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'--chromeos_root',
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dest='chromeos_root',
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default='../..',
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help='ChromeOS root checkout directory.')
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parser.add_argument(
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'-t',
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'--toolchain_root',
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dest='toolchain_root',
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help='Toolchain root directory.')
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parser.add_argument(
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'-o', '--output', dest='output', help='Toolchain output directory')
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parser.add_argument(
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'--sudo',
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dest='sudo',
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action='store_true',
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default=False,
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help='Run the command with sudo.')
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parser.add_argument(
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'-r',
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'--third_party',
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dest='third_party',
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help='The third_party directory to mount.')
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parser.add_argument(
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'-m',
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'--other_mounts',
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dest='other_mounts',
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help='Other mount points in the form: '
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'dir:mounted_dir:options')
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parser.add_argument(
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'-s',
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'--mount-scripts-only',
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dest='mount_scripts_only',
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action='store_true',
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default=False,
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help='Mount only the scripts dir, and not the sources.')
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parser.add_argument(
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'passthrough_argv',
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nargs='*',
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help='Command to be executed inside the chroot.')
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options = parser.parse_args(argv)
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chromeos_root = options.chromeos_root
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chromeos_root = os.path.expanduser(chromeos_root)
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if options.toolchain_root:
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options.toolchain_root = os.path.expanduser(options.toolchain_root)
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chromeos_root = os.path.abspath(chromeos_root)
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tc_dirs = []
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if options.toolchain_root is None or options.mount_scripts_only:
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m = 'toolchain_root not specified. Will not mount toolchain dirs.'
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logger.GetLogger().LogWarning(m)
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else:
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tc_dirs = [
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options.toolchain_root + '/google_vendor_src_branch/gcc',
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options.toolchain_root + '/google_vendor_src_branch/binutils'
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]
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for tc_dir in tc_dirs:
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if not os.path.exists(tc_dir):
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logger.GetLogger().LogError('toolchain path ' + tc_dir +
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' does not exist!')
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parser.print_help()
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sys.exit(1)
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if not os.path.exists(chromeos_root):
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logger.GetLogger().LogError('chromeos_root ' + options.chromeos_root +
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' does not exist!')
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parser.print_help()
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sys.exit(1)
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if not os.path.exists(chromeos_root + '/src/scripts/build_packages'):
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logger.GetLogger().LogError(options.chromeos_root +
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'/src/scripts/build_packages'
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' not found!')
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parser.print_help()
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sys.exit(1)
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version_dir = os.path.realpath(os.path.expanduser(os.path.dirname(__file__)))
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mounted_tc_root = '/usr/local/toolchain_root'
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full_mounted_tc_root = chromeos_root + '/chroot/' + mounted_tc_root
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full_mounted_tc_root = os.path.abspath(full_mounted_tc_root)
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mount_points = []
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for tc_dir in tc_dirs:
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last_dir = misc.GetRoot(tc_dir)[1]
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mount_point = MountPoint(tc_dir, full_mounted_tc_root + '/' + last_dir,
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getpass.getuser(), 'ro')
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mount_points.append(mount_point)
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# Add the third_party mount point if it exists
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if options.third_party:
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third_party_dir = options.third_party
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logger.GetLogger().LogFatalIf(not os.path.isdir(third_party_dir),
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'--third_party option is not a valid dir.')
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else:
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third_party_dir = os.path.abspath(
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'%s/../../../third_party' % os.path.dirname(__file__))
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if os.path.isdir(third_party_dir):
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mount_point = MountPoint(
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third_party_dir,
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('%s/%s' % (full_mounted_tc_root, os.path.basename(third_party_dir))),
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getpass.getuser())
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mount_points.append(mount_point)
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output = options.output
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if output is None and options.toolchain_root:
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# Mount the output directory at /usr/local/toolchain_root/output
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output = options.toolchain_root + '/output'
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if output:
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mount_points.append(
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MountPoint(output, full_mounted_tc_root + '/output', getpass.getuser()))
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# Mount the other mount points
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mount_points += CreateMountPointsFromString(options.other_mounts,
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chromeos_root + '/chroot/')
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last_dir = misc.GetRoot(version_dir)[1]
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# Mount the version dir (v14) at /usr/local/toolchain_root/v14
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mount_point = MountPoint(version_dir, full_mounted_tc_root + '/' + last_dir,
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getpass.getuser())
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mount_points.append(mount_point)
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for mount_point in mount_points:
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retv = mount_point.DoMount()
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if retv != 0:
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return retv
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# Finally, create the symlink to build-gcc.
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command = 'sudo chown ' + getpass.getuser() + ' ' + full_mounted_tc_root
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retv = command_executer.GetCommandExecuter().RunCommand(command)
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try:
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CreateSymlink(last_dir + '/build-gcc', full_mounted_tc_root + '/build-gcc')
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CreateSymlink(last_dir + '/build-binutils',
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full_mounted_tc_root + '/build-binutils')
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except Exception as e:
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logger.GetLogger().LogError(str(e))
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# Now call cros_sdk --enter with the rest of the arguments.
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command = 'cd %s/src/scripts && cros_sdk --enter' % chromeos_root
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if len(options.passthrough_argv) > 1:
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inner_command = ' '.join(options.passthrough_argv[1:])
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inner_command = inner_command.strip()
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if inner_command.startswith('-- '):
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inner_command = inner_command[3:]
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command_file = 'tc_enter_chroot.cmd'
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command_file_path = chromeos_root + '/src/scripts/' + command_file
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retv = command_executer.GetCommandExecuter().RunCommand('sudo rm -f ' +
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command_file_path)
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if retv != 0:
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return retv
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with open(command_file_path, 'w', encoding='utf-8') as f:
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f.write(inner_command)
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logger.GetLogger().LogCmd(inner_command)
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retv = command_executer.GetCommandExecuter().RunCommand('chmod +x ' +
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command_file_path)
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if retv != 0:
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return retv
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if options.sudo:
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command += ' sudo ./' + command_file
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else:
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command += ' ./' + command_file
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retv = command_executer.GetCommandExecuter().RunCommandGeneric(
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command, return_output)
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return retv
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else:
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os.chdir('%s/src/scripts' % chromeos_root)
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ce = command_executer.GetCommandExecuter()
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_, out, _ = ce.RunCommandWOutput('which cros_sdk')
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cros_sdk_binary = out.split()[0]
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return os.execv(cros_sdk_binary, ['', '--enter'])
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def CreateMountPointsFromString(mount_strings, chroot_dir):
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# String has options in the form dir:mount:options
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mount_points = []
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if not mount_strings:
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return mount_points
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mount_list = mount_strings.split()
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for mount_string in mount_list:
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mount_values = mount_string.split(':')
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external_dir = mount_values[0]
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mount_dir = mount_values[1]
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if len(mount_values) > 2:
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options = mount_values[2]
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else:
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options = None
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mount_point = MountPoint(external_dir, chroot_dir + '/' + mount_dir,
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getpass.getuser(), options)
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mount_points.append(mount_point)
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return mount_points
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def CreateSymlink(target, link_name):
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logger.GetLogger().LogFatalIf(
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target.startswith('/'), "Can't create symlink to absolute path!")
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real_from_file = misc.GetRoot(link_name)[0] + '/' + target
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if os.path.realpath(real_from_file) != os.path.realpath(link_name):
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if os.path.exists(link_name):
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command = 'rm -rf ' + link_name
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command_executer.GetCommandExecuter().RunCommand(command)
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os.symlink(target, link_name)
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if __name__ == '__main__':
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retval = Main(sys.argv)
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sys.exit(retval)
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