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#
# sections.py: Kickstart file sections.
#
# Chris Lumens <clumens@redhat.com>
#
# Copyright 2011 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use, modify,
# copy, or redistribute it subject to the terms and conditions of the GNU
# General Public License v.2. This program is distributed in the hope that it
# will be useful, but WITHOUT ANY WARRANTY expressed or implied, including the
# implied warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. Any Red Hat
# trademarks that are incorporated in the source code or documentation are not
# subject to the GNU General Public License and may only be used or replicated
# with the express permission of Red Hat, Inc.
#
"""
This module exports the classes that define a section of a kickstart file. A
section is a chunk of the file starting with a %tag and ending with a %end.
Examples of sections include %packages, %pre, and %post.
You may use this module to define your own custom sections which will be
treated just the same as a predefined one by the kickstart parser. All that
is necessary is to create a new subclass of Section and call
parser.registerSection with an instance of your new class.
"""
from constants import *
from options import KSOptionParser
from version import *
class Section(object):
"""The base class for defining kickstart sections. You are free to
subclass this as appropriate.
Class attributes:
allLines -- Does this section require the parser to call handleLine
for every line in the section, even blanks and comments?
sectionOpen -- The string that denotes the start of this section. You
must start your tag with a percent sign.
timesSeen -- This attribute is for informational purposes only. It is
incremented every time handleHeader is called to keep
track of the number of times a section of this type is
seen.
"""
allLines = False
sectionOpen = ""
timesSeen = 0
def __init__(self, handler, **kwargs):
"""Create a new Script instance. At the least, you must pass in an
instance of a baseHandler subclass.
Valid kwargs:
dataObj --
"""
self.handler = handler
self.version = self.handler.version
self.dataObj = kwargs.get("dataObj", None)
def finalize(self):
"""This method is called when the %end tag for a section is seen. It
is not required to be provided.
"""
pass
def handleLine(self, line):
"""This method is called for every line of a section. Take whatever
action is appropriate. While this method is not required to be
provided, not providing it does not make a whole lot of sense.
Arguments:
line -- The complete line, with any trailing newline.
"""
pass
def handleHeader(self, lineno, args):
"""This method is called when the opening tag for a section is seen.
Not all sections will need this method, though all provided with
kickstart include one.
Arguments:
args -- A list of all strings passed as arguments to the section
opening tag.
"""
self.timesSeen += 1
class NullSection(Section):
"""This defines a section that pykickstart will recognize but do nothing
with. If the parser runs across a %section that has no object registered,
it will raise an error. Sometimes, you may want to simply ignore those
sections instead. This class is useful for that purpose.
"""
def __init__(self, *args, **kwargs):
"""Create a new NullSection instance. You must pass a sectionOpen
parameter (including a leading '%') for the section you wish to
ignore.
"""
Section.__init__(self, *args, **kwargs)
self.sectionOpen = kwargs.get("sectionOpen")
class ScriptSection(Section):
allLines = True
def __init__(self, *args, **kwargs):
Section.__init__(self, *args, **kwargs)
self._script = {}
self._resetScript()
def _getParser(self):
op = KSOptionParser(self.version)
op.add_option("--erroronfail", dest="errorOnFail", action="store_true",
default=False)
op.add_option("--interpreter", dest="interpreter", default="/bin/sh")
op.add_option("--log", "--logfile", dest="log")
return op
def _resetScript(self):
self._script = {"interp": "/bin/sh", "log": None, "errorOnFail": False,
"lineno": None, "chroot": False, "body": []}
def handleLine(self, line):
self._script["body"].append(line)
def finalize(self):
if " ".join(self._script["body"]).strip() == "":
return
kwargs = {"interp": self._script["interp"],
"inChroot": self._script["chroot"],
"lineno": self._script["lineno"],
"logfile": self._script["log"],
"errorOnFail": self._script["errorOnFail"],
"type": self._script["type"]}
s = self.dataObj (self._script["body"], **kwargs)
self._resetScript()
if self.handler:
self.handler.scripts.append(s)
def handleHeader(self, lineno, args):
"""Process the arguments to a %pre/%post/%traceback header for later
setting on a Script instance once the end of the script is found.
This method may be overridden in a subclass if necessary.
"""
Section.handleHeader(self, lineno, args)
op = self._getParser()
(opts, extra) = op.parse_args(args=args[1:], lineno=lineno)
self._script["interp"] = opts.interpreter
self._script["lineno"] = lineno
self._script["log"] = opts.log
self._script["errorOnFail"] = opts.errorOnFail
if hasattr(opts, "nochroot"):
self._script["chroot"] = not opts.nochroot
class PreScriptSection(ScriptSection):
sectionOpen = "%pre"
def _resetScript(self):
ScriptSection._resetScript(self)
self._script["type"] = KS_SCRIPT_PRE
class PostScriptSection(ScriptSection):
sectionOpen = "%post"
def _getParser(self):
op = ScriptSection._getParser(self)
op.add_option("--nochroot", dest="nochroot", action="store_true",
default=False)
return op
def _resetScript(self):
ScriptSection._resetScript(self)
self._script["chroot"] = True
self._script["type"] = KS_SCRIPT_POST
class TracebackScriptSection(ScriptSection):
sectionOpen = "%traceback"
def _resetScript(self):
ScriptSection._resetScript(self)
self._script["type"] = KS_SCRIPT_TRACEBACK
class PackageSection(Section):
sectionOpen = "%packages"
def handleLine(self, line):
if not self.handler:
return
(h, s, t) = line.partition('#')
line = h.rstrip()
self.handler.packages.add([line])
def handleHeader(self, lineno, args):
"""Process the arguments to the %packages header and set attributes
on the Version's Packages instance appropriate. This method may be
overridden in a subclass if necessary.
"""
Section.handleHeader(self, lineno, args)
op = KSOptionParser(version=self.version)
op.add_option("--excludedocs", dest="excludedocs", action="store_true",
default=False)
op.add_option("--ignoremissing", dest="ignoremissing",
action="store_true", default=False)
op.add_option("--nobase", dest="nobase", action="store_true",
default=False)
op.add_option("--ignoredeps", dest="resolveDeps", action="store_false",
deprecated=FC4, removed=F9)
op.add_option("--resolvedeps", dest="resolveDeps", action="store_true",
deprecated=FC4, removed=F9)
op.add_option("--default", dest="defaultPackages", action="store_true",
default=False, introduced=F7)
op.add_option("--instLangs", dest="instLangs", type="string",
default="", introduced=F9)
(opts, extra) = op.parse_args(args=args[1:], lineno=lineno)
self.handler.packages.excludeDocs = opts.excludedocs
self.handler.packages.addBase = not opts.nobase
if opts.ignoremissing:
self.handler.packages.handleMissing = KS_MISSING_IGNORE
else:
self.handler.packages.handleMissing = KS_MISSING_PROMPT
if opts.defaultPackages:
self.handler.packages.default = True
if opts.instLangs:
self.handler.packages.instLangs = opts.instLangs
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