#!/usr/bin/env python
# vim: set ts=4 sts=4 sw=4 textwidth=92:
-from RarslaveCommon import *
-import Par2Parser
+"""
+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))
# The real "meat" of the class
self.dir = dir
self.p2file = p2file
- self.basename = get_basename (p2file)
+ self.basename = rsutil.common.get_basename (p2file)
# Find files that match by name only
- self.name_matched_files = find_name_matches (self.dir, self.basename)
+ self.name_matched_files = rsutil.common.find_name_matches (self.dir, self.basename)
# Find all par2 files for this set using name matches
- self.all_p2files = find_par2_files (self.name_matched_files)
+ self.all_p2files = rsutil.common.find_par2_files (self.name_matched_files)
# Try to get the protected files for this set
- self.prot_matched_files = parse_all_par2 (self.dir, self.p2file, self.all_p2files)
+ self.prot_matched_files = rsutil.common.parse_all_par2 (self.dir, self.p2file, self.all_p2files)
# Setup the all_files combined set (for convenience only)
- self.all_files = no_duplicates (self.name_matched_files + self.prot_matched_files)
+ 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 \
- list_eq (self.name_matched_files, rhs.name_matched_files) and \
- list_eq (self.prot_matched_files, rhs.prot_matched_files)
+ 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 = find_name_matches (self.dir, self.basename)
- self.all_files = no_duplicates (self.name_matched_files + self.prot_matched_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):
- PAR2_CMD = config_get_value ('commands', 'par2repair')
-
- # assemble the command
- # par2repair -- PAR2 PAR2_EXTRA [JOIN_FILES]
- command = "%s \"%s\" " % (PAR2_CMD, self.p2file)
+ """Verify and Repair a PAR2Set. This is done using the par2repair command by
+ default"""
- for f in self.all_p2files:
- if f != self.p2file:
- command += "\"%s\" " % os.path.split (f)[1]
-
- # run the command
- ret = run_command (command, self.dir)
-
- # check the result
- if ret != 0:
- logging.critical ('PAR2 Check / Repair failed: %s' % self.p2file)
- return -ECHECK
-
- return SUCCESS
+ rsutil.common.run_command(['par2repair'] + self.all_p2files, self.dir)
def find_deleteable_files (self):
- DELETE_REGEX = config_get_value ('regular expressions', 'delete_regex')
+ """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
- assert os.path.isdir (dir)
+ dir -- the directory where the files live
+ files -- the filenames themselves
+ interactive -- prompt before deleteion"""
- done = False
- valid_y = ['Y', 'YES']
- valid_n = ['N', 'NO', '']
+ assert os.path.isdir (dir)
+ # If we are interactive, decide yes or no
if interactive:
- while not done:
+ while True:
print 'Do you want to delete the following?:'
for f in files:
print f
- s = raw_input ('Delete [y/N]: ').upper()
- if s in valid_y + valid_n:
- done = True
+ s = raw_input('Delete [y/N]: ').upper()
+
+ # If we got a valid no answer, leave now
+ if s in ['N', 'NO', '']:
+ return
+
+ # If we got a valid yes answer, delete them
+ if s in ['Y', 'YES']:
+ break
- if s in valid_n:
- return SUCCESS
+ # Not a good answer, ask again
+ print 'Invalid response'
+ # We got a yes answer (or are non-interactive), delete the files
for f in files:
- try:
- os.remove (os.path.join (dir, f))
- logging.debug ('Deleteing: %s' % os.path.join (dir, f))
- except:
- logging.error ('Failed to delete: %s' % os.path.join (dir, f))
- return -EDELETE
- return SUCCESS
+ # Get the full filename
+ fullname = os.path.join(dir, f)
+
+ # Delete the file
+ try:
+ os.remove(fullname)
+ logging.debug('Deleting: %s' % fullname)
+ except OSError:
+ logging.error('Failed to delete: %s' % fullname)
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, \
- options_get_value ('interactive'))
+ 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 ()
-
- if ret != SUCCESS:
- logging.critical ('Repair stage failed for: %s' % self.p2file)
- return -ECHECK
+ try:
+ self.runVerifyAndRepair ()
+ except (RuntimeError, OSError):
+ logging.critical('Repair stage failed for: %s' % self.p2file)
+ raise
- self.update_matches ()
+ self.update_matches()
# Extraction Stage
- ret = self.runExtract ()
-
- if ret != SUCCESS:
- logging.critical ('Extraction stage failed for: %s' % self.p2file)
- return -EEXTRACT
+ try:
+ self.runExtract ()
+ except (RuntimeError, OSError):
+ logging.critical('Extraction stage failed for: %s' % self.p2file)
+ raise
self.update_matches ()
# Deletion Stage
- ret = self.runDelete ()
-
- if ret != SUCCESS:
- logging.critical ('Deletion stage failed for: %s' % self.p2file)
- return -EDELETE
-
- logging.info ('Successfully completed: %s' % self.p2file)
- return SUCCESS
-
- def safe_create_directory (self, dir):
- if dir == None:
- return SUCCESS
-
- if os.path.isdir (dir):
- return SUCCESS
-
try:
- os.makedirs (dir)
- logging.info ('Created directory: %s' % dir)
- except OSError:
- logging.critical ('FAILED to create directory: %s' % dir)
- return -ECREATE
-
- return SUCCESS
-
- def runExtract (self, todir=None):
- """Extract all heads of this set"""
-
- # Extract to the head's dir if we don't care where to extract
- if todir == None:
- todir = self.dir
+ self.runDelete ()
+ except (RuntimeError, OSError):
+ logging.critical('Deletion stage failed for: %s' % self.p2file)
+ raise
- # Create the directory $todir if it doesn't exist
- ret = self.safe_create_directory (todir)
+ logging.info ('Successfully completed: %s' % self.p2file)
- if ret != SUCCESS:
- return -EEXTRACT
+ def runExtract (self):
+ """Extract all heads of this set and return the result"""
# Call the extraction function on each head
for h in self.find_extraction_heads ():
- full_head = full_abspath (os.path.join (self.dir, h))
- ret = self.extraction_function (full_head, todir)
- logging.debug ('Extraction Function returned: %d' % ret)
-
- # Check error code
- if ret != SUCCESS:
- logging.critical ('Failed extracting: %s' % h)
- return -EEXTRACT
-
- return SUCCESS
+ full_head = rsutil.common.full_abspath (os.path.join (self.dir, h))
+ self.extraction_function (full_head, self.dir)
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