608 lines
26 KiB
Python
608 lines
26 KiB
Python
#
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# argument_parsing.py: option parsing for anaconda (CLI and boot args)
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#
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# Copyright (C) 2012 Red Hat, Inc. All rights reserved.
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#
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# This program 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 2 of the License, or
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# (at your option) any later version.
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#
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# This program 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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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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DESCRIPTION = "Anaconda is the installation program used by Fedora, " \
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"Red Hat Enterprise Linux and some other distributions."
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import itertools
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import os
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import sys
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import fcntl
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import termios
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import struct
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from argparse import ArgumentParser, ArgumentError, HelpFormatter, Namespace, Action
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from pyanaconda.flags import flags as flags_instance
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from pyanaconda.core.kernel import KernelArguments
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from pyanaconda.core.constants import DisplayModes, X_TIMEOUT, VIRTIO_PORT
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from pyanaconda.anaconda_loggers import get_module_logger
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log = get_module_logger(__name__)
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# Help text formatting constants
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LEFT_PADDING = 8 # the help text will start after 8 spaces
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RIGHT_PADDING = 8 # there will be 8 spaces left on the right
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DEFAULT_HELP_WIDTH = 80
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def get_help_width():
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"""
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Try to detect the terminal window width size and use it to
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compute optimal help text width. If it can't be detected
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a default values is returned.
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:returns: optimal help text width in number of characters
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:rtype: int
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"""
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# don't do terminal size detection on s390, it is not supported
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# by its arcane TTY system and only results in cryptic error messages
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# ending on the standard output
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# (we do the s390 detection here directly to avoid
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# the delay caused by importing the Blivet module
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# just for this single call)
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is_s390 = os.uname()[4].startswith('s390')
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if is_s390:
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return DEFAULT_HELP_WIDTH
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try:
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data = fcntl.ioctl(sys.stdout, termios.TIOCGWINSZ, '1234')
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columns = int(struct.unpack('hh', data)[1])
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except (IOError, ValueError) as e:
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log.info("Unable to determine terminal width: %s", e)
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print("terminal size detection failed, using default width")
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return DEFAULT_HELP_WIDTH
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log.debug("detected window size of %s", columns)
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# apply the right padding
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columns = columns - RIGHT_PADDING
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if columns > 0:
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help_width = columns
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else:
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help_width = DEFAULT_HELP_WIDTH
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return help_width
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class AnacondaArgumentParser(ArgumentParser):
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"""
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Subclass of ArgumentParser that also examines boot arguments.
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"""
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def __init__(self, *args, **kwargs):
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"""
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If the "bootarg_prefix" keyword argument is set, it's assumed that all
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bootargs will start with that prefix.
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"require_prefix" is a bool:
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False: accept the argument with or without the prefix.
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True: ignore the argument without the prefix. (default)
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"""
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help_width = get_help_width()
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self._boot_arg = dict()
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self.removed_no_inst_bootargs = []
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self.bootarg_prefix = kwargs.pop("bootarg_prefix", "")
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self.require_prefix = kwargs.pop("require_prefix", True)
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# List of boot options which are correct with and without the inst. prefix
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# Please add here options which are processed by us but also by someone
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# else during the boot.
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# NOTE: Adding this to add_argument() directly could be problematic because just specific
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# long option variants could be allowed from multiple, so it would have to be list which
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# somehow kills the benefit.
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self._require_prefix_ignore_list = ["proxy"]
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ArgumentParser.__init__(self, description=DESCRIPTION,
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formatter_class=lambda prog: HelpFormatter(
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prog, max_help_position=LEFT_PADDING, width=help_width),
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*args, **kwargs)
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def add_argument(self, *args, **kwargs):
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"""
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Add a new option - like ArgumentParser.add_argument.
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The long options will be added to the list of boot args, unless
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the keyword argument 'bootarg' is set to False.
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Positional arguments that don't start with '-' are considered extra
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boot args to look for.
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NOTE: conflict_handler is currently ignored for boot args - they will
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always raise ArgumentError if they conflict.
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"""
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# TODO: add kwargs to make an option commandline-only or boot-arg-only
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flags = [a for a in args if a.startswith('-')]
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bootargs = [a for a in args if not a.startswith('-')]
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do_bootarg = kwargs.pop("bootarg", True)
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option = super().add_argument(*flags, **kwargs)
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# make a generator that returns only the long opts without the -- prefix
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long_opts = (o[2:] for o in option.option_strings if o.startswith("--"))
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bootargs += (flag for flag in long_opts)
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if do_bootarg:
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for b in bootargs:
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if b in self._boot_arg:
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raise ArgumentError(
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"conflicting bootopt string: %s" % b, option)
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else:
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self._boot_arg[b] = option
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return option
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def _get_bootarg_option(self, arg):
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"""
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Find the correct Option for a given bootarg (if one exists)
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:param string arg: boot option
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:returns: argparse option object or None if no suitable option is found
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:rtype argparse option or None
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"""
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prefixed_option = False
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if self.bootarg_prefix and arg.startswith(self.bootarg_prefix):
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prefixed_option = True
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arg = arg[len(self.bootarg_prefix):]
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option = self._boot_arg.get(arg)
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if option and self.bootarg_prefix and not prefixed_option:
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if arg not in self._require_prefix_ignore_list:
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self.removed_no_inst_bootargs.append(arg)
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# From Fedora 34 this prefix is required. However, leave the code here for some time to
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# tell users that we are ignoring the old variants.
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if self.require_prefix and not prefixed_option:
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return None
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return option
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def parse_boot_cmdline(self, boot_cmdline):
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"""
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Parse the boot cmdline and create an appropriate Namespace instance
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according to the option definitions set by add_argument.
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boot_cmdline can be given as a string (to be parsed by KernelArguments), or a
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dict (or any object with .items()) of {bootarg:value} pairs.
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If boot_cmdline is None, the boot_cmdline data will be whatever KernelArguments reads
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by default (/proc/cmdline, /run/initramfs/etc/cmdline, /etc/cmdline).
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If an option requires a value but the boot arg doesn't provide one,
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we'll quietly not set anything in the Namespace. We also skip any boot options
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that were not specified by add_argument as we don't care about them
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(there will usually be quite a lot of them (rd.*, etc.).
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:param boot_cmdline: the Anaconda boot command line arguments
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:type boot_cmdline: string, dict or None
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:returns: an argparse Namespace instance
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:rtype: Namespace
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"""
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namespace = Namespace()
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if boot_cmdline is None:
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bootargs = KernelArguments.from_defaults()
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elif isinstance(boot_cmdline, str):
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bootargs = KernelArguments.from_string(boot_cmdline)
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else:
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bootargs = boot_cmdline
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self.removed_no_inst_bootargs = []
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# go over all options corresponding to current boot cmdline
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# and do any modifications necessary
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# NOTE: program cmdline overrides boot cmdline
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for arg, val in bootargs.items_raw():
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option = self._get_bootarg_option(arg)
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if option is None:
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# this boot option is unknown to Anaconda, skip it
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continue
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if option.nargs != 0 and val is None:
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# nargs == 0 -> the option expects one or more arguments but the
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# boot option was not given any, so we skip it
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log.warning("boot option specified without expected number of "
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"arguments and will be ignored: %s", arg)
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continue
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elif option.nargs == 0 and option.const is not None:
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# nargs == 0 & constr == True -> store_true
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# (we could also check the class, but it begins with an
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# underscore, so it would be ugly)
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# special case: "mpath=0" would otherwise set mpath to True
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if option.const is True and val in ("0", "no", "off"):
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setattr(namespace, option.dest, False)
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# Set all other set_const cases to the const specified
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else:
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setattr(namespace, option.dest, option.const)
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# anaconda considers cases such as noselinux=off to be a negative
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# concord, which is to say that selinux will be set to False and
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# we hate you.
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continue
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elif type(val) is list:
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for item in val:
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option(self, namespace, item)
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continue
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option(self, namespace, val)
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return namespace
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# pylint: disable=arguments-differ
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def parse_args(self, args=None, boot_cmdline=None):
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"""
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Like ArgumentParser.parse_args(), but also parses the boot cmdline.
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(see parse_boot_cmdline for details on that process.)
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Program cmdline arguments will override boot cmdline arguments.
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:param args: program command line arguments
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:type args: string or None
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:param boot_cmdline: the Anaconda boot command line arguments
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:type boot_cmdline: string, dict or None
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:returns: an argparse Namespace instance
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:rtype: Namespace
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"""
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# parse boot options first
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namespace = self.parse_boot_cmdline(boot_cmdline)
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# parse CLI arguments (if any) and add them to the namespace
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# created from parsing boot options, overriding any options
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# with the same destination already present in the namespace
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# NOTE: this means that CLI options override boot options
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namespace = super().parse_args(args, namespace)
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return namespace
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def name_path_pairs(image_specs):
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"""Processes and verifies image file specifications. Generates pairs
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of names and paths.
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:param image_specs: a list of image specifications
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:type image_specs: list of str
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Each image spec in image_specs has format <path>[:<name>] where
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<path> is the path to a local file and <name> is an optional
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name used to identify the disk in UI. <name> may not contain colons
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or slashes.
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If no name given in specification, synthesizes name from basename
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of path. Since two distinct paths may have the same basename, handles
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name collisions by synthesizing a different name for the colliding
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name.
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Raises an exception if:
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* A path is empty
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* A path specifies a non-existant file
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* A path specifies a directory
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* Duplicate paths are specified
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* A name contains a "/"
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"""
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image_specs = (spec.rsplit(":", 1) for spec in image_specs)
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path_name_pairs = ((image_spec[0], image_spec[1].strip() if len(image_spec) == 2 else None) for image_spec in image_specs)
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paths_seen = []
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names_seen = []
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for (path, name) in path_name_pairs:
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if path == "":
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raise ValueError("empty path specified for image file")
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path = os.path.abspath(path)
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if not os.path.exists(path):
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raise ValueError("non-existant path %s specified for image file" % path)
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if os.path.isdir(path):
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raise ValueError("directory path %s specified for image file" % path)
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if path in paths_seen:
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raise ValueError("path %s specified twice for image file" % path)
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paths_seen.append(path)
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if name and "/" in name:
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raise ValueError("improperly formatted image file name %s, includes slashes" % name)
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if not name:
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name = os.path.splitext(os.path.basename(path))[0]
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if name in names_seen:
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names = ("%s_%d" % (name, n) for n in itertools.count())
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name = next(itertools.dropwhile(lambda n: n in names_seen, names))
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names_seen.append(name)
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yield name, path
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class HelpTextParser(object):
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"""Class to parse help text from file and make it available to option
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parser.
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"""
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def __init__(self, path):
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""" Initializer
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:param path: The absolute path to the help text file
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"""
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self._path = path
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self._help_text = None
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def read(self, lines):
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"""Reads option, help text pairs from a text file.
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Each pair is separated from the next by an empty line.
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The option comes first, followed by any number of lines of help text.
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:param lines: a sequence of lines of text
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"""
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if not lines:
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return
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expect_option = True
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option = None
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text = []
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for line in (line.strip() for line in lines):
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if line == "":
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expect_option = True
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elif expect_option:
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if option:
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yield option, " ".join(text)
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option = line
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text = []
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expect_option = False
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else:
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text.append(line)
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yield option, " ".join(text)
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def help_text(self, option):
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"""
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Returns the help text corresponding to the given command-line option.
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If no help text is available, returns the empty string.
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:param str option: The name of the option
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:rtype: str
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"""
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if self._help_text is None:
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self._help_text = {}
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try:
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with open(self._path) as lines:
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for parsed_option, parsed_text in self.read(lines):
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self._help_text[parsed_option] = parsed_text
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except IOError as e:
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log.error("error reading help text file %s: %s", self._path, e)
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return self._help_text.get(option, "")
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def getArgumentParser(version_string, boot_cmdline=None):
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"""Return the anaconda argument parser.
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:param str version_string: The version string, e.g. 23.19.5.
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:param KernelArguments boot_cmdline: The boot command line options
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:rtype: AnacondaArgumentParser
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"""
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datadir = os.environ.get("ANACONDA_DATADIR", "/usr/share/anaconda")
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# NOTE: for each long option (like '--repo'), AnacondaOptionParser
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# checks the boot arguments for bootarg_prefix+option ('inst.repo').
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# If require_prefix is False, it also accepts the option without the
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# bootarg_prefix ('repo').
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# See anaconda_optparse.py and KernelArguments (in flags.py) for details.
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ap = AnacondaArgumentParser(bootarg_prefix="inst.", require_prefix=True)
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help_parser = HelpTextParser(os.path.join(datadir, "anaconda_options.txt"))
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# NOTE: store_false options will *not* get negated when the user does
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# "option=0" on the boot commandline (store_true options do, though).
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# Basically, don't use store_false unless the option starts with "no".
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# YET ANOTHER NOTE: If you change anything here:
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# a) document its usage in docs/boot-options.txt
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# b) be prepared to maintain it for a very long time
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# If this seems like too much trouble, *don't add a new option*!
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# Version
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ap.add_argument('--version', action='version', version="%(prog)s " + version_string)
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class SetCmdlineMode(Action):
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def __call__(self, parser, namespace, values, option_string=None):
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# We need to save both display mode to TEXT and set noninteractive flag
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setattr(namespace, "display_mode", DisplayModes.TUI)
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setattr(namespace, "noninteractive", True)
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# Interface
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ap.add_argument("-G", "--graphical", dest="display_mode", action="store_const", const=DisplayModes.GUI,
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default=DisplayModes.GUI, help=help_parser.help_text("graphical"))
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ap.add_argument("-T", "--text", dest="display_mode", action="store_const", const=DisplayModes.TUI,
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help=help_parser.help_text("text"))
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ap.add_argument("-C", "--cmdline", action=SetCmdlineMode, nargs=0,
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help=help_parser.help_text("cmdline"))
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ap.add_argument("--noninteractive", dest="noninteractive", action="store_true",
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help=help_parser.help_text("noninteractive"))
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# Product and variant.
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ap.add_argument("--product", dest="product_name", metavar="PRODUCT_NAME",
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default="", help=help_parser.help_text("product"))
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ap.add_argument("--variant", dest="variant_name", metavar="VARIANT_NAME",
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default="", help=help_parser.help_text("variant"))
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# Network
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ap.add_argument("--proxy", metavar='PROXY_URL', help=help_parser.help_text("proxy"))
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class SetWaitfornet(Action):
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def __call__(self, parser, namespace, values, option_string=None):
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value = None
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try:
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ivalue = int(values)
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except ValueError:
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pass
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else:
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if ivalue > 0:
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value = ivalue
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if value is None:
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value = 0
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setattr(namespace, self.dest, value)
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ap.add_argument("--waitfornet", dest="waitfornet", metavar="TIMEOUT_IN_SECONDS",
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action=SetWaitfornet, help=help_parser.help_text("waitfornet"))
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# Method of operation
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ap.add_argument("-d", "--debug", dest="debug", action="store_true",
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default=False, help=help_parser.help_text("debug"))
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ap.add_argument("--ks", dest="ksfile", action="store_const",
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metavar="KICKSTART_URL", const="/run/install/ks.cfg",
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help=help_parser.help_text("ks"))
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ap.add_argument("--kickstart", dest="ksfile", metavar="KICKSTART_PATH",
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help=help_parser.help_text("kickstart"))
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ap.add_argument("--ksstrict", dest="ksstrict", action="store_true",
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default=False, help=help_parser.help_text("ksstrict"))
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ap.add_argument("--rescue", dest="rescue", action="store_true", default=False,
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help=help_parser.help_text("rescue"))
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ap.add_argument("--armplatform", dest="armPlatform", type=str, metavar="PLATFORM_ID",
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help="This option is deprecated.")
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ap.add_argument("--multilib", dest="multiLib", action="store_true", default=False,
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help=help_parser.help_text("multilib"))
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ap.add_argument("-m", "--method", dest="method", default=None, metavar="METHOD",
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help=help_parser.help_text("method"))
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ap.add_argument("--repo", dest="method", default=None, metavar="REPO_URL",
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help=help_parser.help_text("repo"))
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ap.add_argument("--stage2", dest="stage2", default=None, metavar="STAGE2_URL",
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help=help_parser.help_text("stage2"))
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ap.add_argument("--addrepo", dest="addRepo", default=[], metavar="NAME,ADDITIONAL_REPO_URL",
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action="append", help=help_parser.help_text("addrepo"))
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ap.add_argument("--noverifyssl", action="store_true", default=False,
|
|
help=help_parser.help_text("noverifyssl"))
|
|
ap.add_argument("--liveinst", action="store_true", default=False,
|
|
help=help_parser.help_text("liveinst"))
|
|
|
|
# Display
|
|
ap.add_argument("--resolution", dest="runres", default=None, metavar="WIDTHxHEIGHT",
|
|
help=help_parser.help_text("resolution"))
|
|
ap.add_argument("--usefbx", dest="xdriver", action="store_const", const="fbdev",
|
|
help=help_parser.help_text("usefbx"))
|
|
ap.add_argument("--vnc", action="store_true", default=False,
|
|
help=help_parser.help_text("vnc"))
|
|
ap.add_argument("--vncconnect", metavar="HOST:PORT", help=help_parser.help_text("vncconnect"))
|
|
ap.add_argument("--vncpassword", default="", metavar="PASSWORD",
|
|
help=help_parser.help_text("vncpassword"))
|
|
ap.add_argument("--xdriver", dest="xdriver", action="store", type=str,
|
|
default=None, metavar="DRIVER", help=help_parser.help_text("xdriver"))
|
|
ap.add_argument("--xtimeout", dest="xtimeout", action="store", type=int, default=X_TIMEOUT,
|
|
metavar="TIMEOUT_IN_SECONDS", help=help_parser.help_text("xtimeout"))
|
|
|
|
# Language
|
|
ap.add_argument("--keymap", metavar="KEYMAP", help=help_parser.help_text("keymap"))
|
|
ap.add_argument("--lang", metavar="LANG", help=help_parser.help_text("lang"))
|
|
|
|
# Obvious
|
|
ap.add_argument("--syslog", metavar="HOST[:PORT]", help=help_parser.help_text("syslog"))
|
|
ap.add_argument("--remotelog", metavar="HOST:PORT", help=help_parser.help_text("remotelog"))
|
|
ap.add_argument("--virtiolog", metavar="/dev/virtio-ports/NAME", default=VIRTIO_PORT,
|
|
help=help_parser.help_text("virtiolog"))
|
|
|
|
from pykickstart.constants import SELINUX_DISABLED, SELINUX_ENFORCING
|
|
from pyanaconda.core.constants import SELINUX_DEFAULT
|
|
ap.add_argument("--noselinux", dest="selinux", action="store_const",
|
|
const=SELINUX_DISABLED, default=SELINUX_DEFAULT,
|
|
help=help_parser.help_text("noselinux"))
|
|
|
|
# Use a custom action to convert --selinux=0 and --selinux=1 into the
|
|
# appropriate constants
|
|
class ParseSelinux(Action):
|
|
def __call__(self, parser, namespace, values, option_string=None):
|
|
if values == "0":
|
|
setattr(namespace, self.dest, SELINUX_DISABLED)
|
|
else:
|
|
setattr(namespace, self.dest, SELINUX_ENFORCING)
|
|
|
|
ap.add_argument("--selinux", action=ParseSelinux, nargs="?", help=help_parser.help_text("selinux"))
|
|
|
|
ap.add_argument("--nompath", dest="mpath", action="store_false", default=True,
|
|
help=help_parser.help_text("nompath"))
|
|
ap.add_argument("--mpath", action="store_true", help=help_parser.help_text("mpath"))
|
|
|
|
ap.add_argument("--gpt", action="store_true", default=False, help=help_parser.help_text("gpt"))
|
|
|
|
ap.add_argument("--nodmraid", dest="dmraid", action="store_false", default=True,
|
|
help=help_parser.help_text("nodmraid"))
|
|
ap.add_argument("--dmraid", action="store_true", help=help_parser.help_text("dmraid"))
|
|
|
|
ap.add_argument("--noibft", dest="ibft", action="store_false", default=True,
|
|
help=help_parser.help_text("noibft"))
|
|
ap.add_argument("--ibft", action="store_true", help=help_parser.help_text("ibft"))
|
|
ap.add_argument("--nonibftiscsiboot", action="store_true", default=False,
|
|
help=help_parser.help_text("nonibftiscsiboot"))
|
|
|
|
# Geolocation
|
|
ap.add_argument("--geoloc", metavar="PROVIDER_ID", help=help_parser.help_text("geoloc"))
|
|
ap.add_argument("--geoloc-use-with-ks", action="store_true", default=False,
|
|
help=help_parser.help_text("geoloc-use-with-ks"))
|
|
|
|
# Kickstart and log saving
|
|
# - use a custom action to convert the values of the nosave option into appropriate flags
|
|
class ParseNosave(Action):
|
|
def __call__(self, parser, namespace, values, option_string=None):
|
|
options = []
|
|
if values:
|
|
options = values.split(",")
|
|
if "all" in options:
|
|
flags_instance.nosave_input_ks = True
|
|
flags_instance.nosave_output_ks = True
|
|
flags_instance.nosave_logs = True
|
|
else:
|
|
if "all_ks" in options:
|
|
flags_instance.nosave_input_ks = True
|
|
flags_instance.nosave_output_ks = True
|
|
else:
|
|
if "input_ks" in options:
|
|
flags_instance.nosave_input_ks = True
|
|
if "output_ks" in options:
|
|
flags_instance.nosave_output_ks = True
|
|
if "logs" in options:
|
|
flags_instance.nosave_logs = True
|
|
|
|
ap.add_argument("--nosave", action=ParseNosave, nargs="?", help=help_parser.help_text("nosave"))
|
|
|
|
# Miscellaneous
|
|
ap.add_argument("--nomount", dest="rescue_nomount", action="store_true", default=False,
|
|
help=help_parser.help_text("nomount"))
|
|
ap.add_argument("--updates", dest="updates_url", action="store", type=str,
|
|
metavar="UPDATES_URL", help=help_parser.help_text("updates"))
|
|
ap.add_argument("--image", action="append", dest="images", default=[],
|
|
metavar="IMAGE_SPEC", help=help_parser.help_text("image"))
|
|
ap.add_argument("--dirinstall", nargs="?",
|
|
const=os.environ.get("ANACONDA_ROOT_PATH", "/mnt/sysimage"),
|
|
help=help_parser.help_text("dirinstall"))
|
|
ap.add_argument("--memcheck", action="store_true", default=True,
|
|
help=help_parser.help_text("memcheck"))
|
|
ap.add_argument("--nomemcheck", action="store_false", dest="memcheck",
|
|
help=help_parser.help_text("nomemcheck"))
|
|
ap.add_argument("--leavebootorder", action="store_true", default=False,
|
|
help=help_parser.help_text("leavebootorder"))
|
|
ap.add_argument("--noeject", action="store_false", dest="eject", default=True,
|
|
help=help_parser.help_text("noeject"))
|
|
ap.add_argument("--extlinux", action="store_true", default=False,
|
|
help=help_parser.help_text("extlinux"))
|
|
ap.add_argument("--nombr", action="store_true", default=False,
|
|
help=help_parser.help_text("nombr"))
|
|
ap.add_argument("--mpathfriendlynames", dest="multipath_friendly_names", action="store_true",
|
|
default=True, help=help_parser.help_text("mpathfriendlynames"))
|
|
ap.add_argument("--kexec", action="store_true", default=False,
|
|
help=help_parser.help_text("kexec"))
|
|
|
|
# some defaults change based on cmdline flags
|
|
if boot_cmdline is not None:
|
|
if "console" in boot_cmdline:
|
|
ap.set_defaults(display_mode=DisplayModes.TUI)
|
|
|
|
return ap
|