# Methods and API for anaconda/firstboot 3rd party addons # # Copyright (C) 2012 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, or (at your option) any later version. # 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. # # Red Hat Author(s): Martin Sivak # __all__ = ["AddonSection", "AddonRegistry", "AddonData", "collect_addon_paths"] import os import functools from pykickstart.sections import Section def collect_addon_paths(toplevel_addon_paths, ui_subdir="gui"): """This method looks into the directories present in toplevel_addon_paths and registers each subdirectory as a new addon identified by that subdirectory name. It then registers spokes, categories and data (ks) paths for the application to use. By default is looks for spokes and categories in /gui/ subdirectory but that can be changed using the ui_subdir argument.""" module_paths = { "spokes": [], "ks": [], "categories": [] } for path in toplevel_addon_paths: try: directories = os.listdir(path) except OSError: directories = [] for addon_id in directories: addon_ks_path = os.path.join(path, addon_id, "ks") if os.path.isdir(addon_ks_path): module_paths["ks"].append(("%s.ks.%%s" % addon_id, addon_ks_path)) addon_spoke_path = os.path.join(path, addon_id, ui_subdir, "spokes") if os.path.isdir(addon_spoke_path): module_paths["spokes"].append(("%s.%s.spokes.%%s" % (addon_id, ui_subdir), addon_spoke_path)) addon_category_path = os.path.join(path, addon_id, "categories") if os.path.isdir(addon_category_path): module_paths["categories"].append(("%s.categories.%%s" % addon_id, addon_category_path)) return module_paths class AddonRegistry(object): """This class represents the ksdata.addons object and maintains the ids and data structures for loaded addons. It acts as a proxy during kickstart save. """ def __init__(self, dictionary): self.__dict__ = dictionary def __str__(self): return functools.reduce(lambda acc, (id, addon): acc + str(addon), self.__dict__.items(), "") def execute(self, storage, ksdata, instClass, users): """This method calls execute on all the registered addons.""" for v in self.__dict__.values(): if hasattr(v, "execute"): v.execute(storage, ksdata, instClass, users) def setup(self, storage, ksdata, instClass): """This method calls setup on all the registered addons.""" for v in self.__dict__.values(): if hasattr(v, "setup"): v.setup(storage, ksdata, instClass) class AddonData(object): """This is a common parent class for loading and storing 3rd party data to kickstart. It is instantiated by kickstart parser and stored as ksdata.addons. to be used in the user interfaces. The mandatory method handle_line receives all lines from the corresponding addon section in kickstart and the mandatory __str__ implementation is responsible for returning the proper kickstart text (to be placed into the %addon section) back. There is also a mandatory method execute, which should make all the described changes to the installed system. """ def __init__(self, name): self.name = name self.content = "" self.header_args = "" def __str__(self): return "%%addon %s %s\n%s%%end\n" % (self.name, self.header_args, self.content) def setup(self, storage, ksdata, instClass): """Make the changes to the install system. This method is called before the installation is started and directly from spokes. It must be possible to call it multiple times without breaking the environment.""" pass def execute(self, storage, ksdata, instClass, users): """Make the changes to the underlying system. This method is called only once in the post-install setup phase. """ pass def handle_header(self, lineno, args): """Process additional arguments to the %addon line. This function receives any arguments on the %addon line after the addon ID. For example, for the line: %addon com_example_foo --argument='example' This function would be called with args=["--argument='example'"]. By default AddonData.handle_header just preserves the passed arguments by storing them and adding them to the __str__ output. """ if args: self.header_args += " ".join(args) def handle_line(self, line): """Process one kickstart line.""" self.content += line def finalize(self): """No additional data will come. Addon should check if all mandatory attributes were populated. """ pass class AddonSection(Section): sectionOpen = "%addon" def __init__(self, *args, **kwargs): Section.__init__(self, *args, **kwargs) self.addon_id = None def handleLine(self, line): if not self.handler: return if not self.addon_id: return addon = getattr(self.handler.addons, self.addon_id) addon.handle_line(line) def handleHeader(self, lineno, args): """Process the arguments to the %addon header.""" Section.handleHeader(self, lineno, args) self.addon_id = args[1] # if the addon is not registered, create dummy placeholder for it if self.addon_id and not hasattr(self.handler.addons, self.addon_id): setattr(self.handler.addons, self.addon_id, AddonData(self.addon_id)) # Parse additional arguments to %addon with the AddonData handler addon = getattr(self.handler.addons, self.addon_id) addon.handle_header(lineno, args[2:]) def finalize(self): """Let addon know no additional data will come.""" Section.finalize(self) addon = getattr(self.handler.addons, self.addon_id) addon.finalize()