#!/usr/bin/env python
# vim: set ts=4 sts=4 sw=4 textwidth=92:
-import rsutil.common
+"""
+Holds the PAR2Set base class
+"""
+
+__author__ = "Ira W. Snyder (devel@irasnyder.com)"
+__copyright__ = "Copyright (c) 2006,2007 Ira W. Snyder (devel@irasnyder.com)"
+__license__ = "GNU GPL v2 (or, at your option, any later version)"
+
+# Base.py
+#
+# Copyright (C) 2006,2007 Ira W. Snyder (devel@irasnyder.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import re
import os
import logging
+import rsutil.common
+
# This is a fairly generic class which does all of the major things that a PAR2
# set will need to have done to be verified and extracted. For most "normal" types
# you won't need to override hardly anything.
# It is ok to override other functions if the need arises, just make sure that you
# understand why things are done the way that they are in the original versions.
#
-# Assumptions made about each of the run*() functions:
+# Assumptions made in the runVerifyAndRepair(), runExtract() and runDelete() functions:
# ==============================================================================
-# The state of self.name_matched_files and self.prot_matched_files will be consistent
-# with the real, in-filesystem state at the time that they are called.
-# (This is why runAll() calls update_matches() all the time.)
+# The state of self.name_matched_files, self.prot_matched_files, and self.all_files
+# will be consistent with the real, in-filesystem state at the time that they are
+# called. This is the reason that runAll() calls update_matches() after running each
+# operation that will possibly change the filesystem.
#
# Required overrides:
# ==============================================================================
#
class Base (object):
+ """Base class for all PAR2Set types"""
# Instance Variables
# ==========================================================================
# prot_matched_files -- Files in this set, guessed by parsing the PAR2 only
def __init__ (self, dir, p2file):
+ """Default constructor for all PAR2Set types
+
+ dir -- a directory
+ p2file -- a PAR2 file inside the given directory"""
+
assert os.path.isdir (dir)
assert os.path.isfile (os.path.join (dir, p2file))
self.all_files = rsutil.common.no_duplicates (self.name_matched_files + self.prot_matched_files)
def __eq__ (self, rhs):
+ """Check for equality between PAR2Set types"""
+
return (self.dir == rhs.dir) and (self.basename == rhs.basename) and \
rsutil.common.list_eq (self.name_matched_files, rhs.name_matched_files) and \
rsutil.common.list_eq (self.prot_matched_files, rhs.prot_matched_files)
def update_matches (self):
- """Updates the contents of instance variables which are likely to change after
- running an operation, usually one which will create new files."""
+ """Updates the contents of instance variables with the current in-filesystem state.
+ This should be run after any operation which can create or delete files."""
self.name_matched_files = rsutil.common.find_name_matches (self.dir, self.basename)
self.all_files = rsutil.common.no_duplicates (self.name_matched_files + self.prot_matched_files)
def runVerifyAndRepair (self):
+ """Verify and Repair a PAR2Set. This is done using the par2repair command by
+ default"""
+
PAR2_CMD = rsutil.common.config_get_value ('commands', 'par2repair')
# assemble the command
return rsutil.common.SUCCESS
def find_deleteable_files (self):
+ """Find all files which are deletable by using the regular expression from the
+ configuration file"""
+
DELETE_REGEX = rsutil.common.config_get_value ('regular expressions', 'delete_regex')
dregex = re.compile (DELETE_REGEX, re.IGNORECASE)
return [f for f in self.all_files if dregex.match (f)]
def delete_list_of_files (self, dir, files, interactive=False):
- # Delete a list of files
+ """Attempt to delete all files given
+
+ dir -- the directory where the files live
+ files -- the filenames themselves
+ interactive -- prompt before deleteion"""
assert os.path.isdir (dir)
return rsutil.common.SUCCESS
def runDelete (self):
+ """Run the delete operation and return the result"""
+
deleteable_files = self.find_deleteable_files ()
ret = self.delete_list_of_files (self.dir, deleteable_files, \
rsutil.common.options_get_value ('interactive'))
return ret
def runAll (self):
+ """Run all of the major sections in the class: repair, extraction, and deletion."""
# Repair Stage
ret = self.runVerifyAndRepair ()
return rsutil.common.SUCCESS
def safe_create_directory (self, dir):
+ """Safely create a directory, logging the result.
+
+ dir -- the directory to create (None is ignored)"""
+
if dir == None:
return rsutil.common.SUCCESS
return rsutil.common.SUCCESS
def runExtract (self, todir=None):
- """Extract all heads of this set"""
+ """Extract all heads of this set and return the result"""
# Extract to the head's dir if we don't care where to extract
if todir == None:
return rsutil.common.SUCCESS
def find_extraction_heads (self):
+ """Find all extraction heads associated with this set. This must be
+ overridden for the associated PAR2Set derived class to work."""
+
assert False # You MUST override this on a per-type basis
def extraction_function (self, file, todir):
- # NOTE: Please keep the prototype the same for all overridden functions.
- # Doing so will guarantee that your life is made much easier.
- #
- # Also note that the todir given will always be valid for the current directory
- # when the function is called.
+ """Extract a single head of this PAR2Set's type.
+
+ file -- the full path to the file to be extracted
+ todir -- the directory to extract to"""
assert False # You MUST override this on a per-type basis
projects / rarslave2.git / blobdiff