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# Copyright 2002 Ben Escoto
#
# This file is part of rdiff-backup.
#
# rdiff-backup is free software; you can redistribute it and/or modify
# 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.
#
# rdiff-backup 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 rdiff-backup; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
"""list, delete, and otherwise manage increments"""
from __future__ import generators
from log import Log
import Globals, Time, static, statistics, restore, selection
class ManageException(Exception): pass
def get_file_type(rp):
"""Returns one of "regular", "directory", "missing", or "special"."""
if not rp.lstat(): return "missing"
elif rp.isdir(): return "directory"
elif rp.isreg(): return "regular"
else: return "special"
def get_inc_type(inc):
"""Return file type increment represents"""
assert inc.isincfile()
type = inc.getinctype()
if type == "dir": return "directory"
elif type == "diff": return "regular"
elif type == "missing": return "missing"
elif type == "snapshot": return get_file_type(inc)
else: assert None, "Unknown type %s" % (type,)
def describe_incs_parsable(incs, mirror_time, mirrorrp):
"""Return a string parsable by computer describing the increments
Each line is a time in seconds of the increment, and then the
type of the file. It will be sorted oldest to newest. For example:
10000 regular
20000 directory
30000 special
40000 missing
50000 regular <- last will be the current mirror
"""
incpairs = [(inc.getinctime(), inc) for inc in incs]
incpairs.sort()
result = ["%s %s" % (time, get_inc_type(inc)) for time, inc in incpairs]
result.append("%s %s" % (mirror_time, get_file_type(mirrorrp)))
return "\n".join(result)
def describe_incs_human(incs, mirror_time, mirrorrp):
"""Return a string describing all the the root increments"""
incpairs = [(inc.getinctime(), inc) for inc in incs]
incpairs.sort()
result = ["Found %d increments:" % len(incpairs)]
for time, inc in incpairs:
result.append(" %s %s" %
(inc.dirsplit()[1], Time.timetopretty(time)))
result.append("Current mirror: %s" % Time.timetopretty(mirror_time))
return "\n".join(result)
def delete_earlier_than(baserp, time):
"""Deleting increments older than time in directory baserp
time is in seconds. It will then delete any empty directories
in the tree. To process the entire backup area, the
rdiff-backup-data directory should be the root of the tree.
"""
baserp.conn.manage.delete_earlier_than_local(baserp, time)
def delete_earlier_than_local(baserp, time):
"""Like delete_earlier_than, but run on local connection for speed"""
assert baserp.conn is Globals.local_connection
def yield_files(rp):
yield rp
if rp.isdir():
for filename in rp.listdir():
for sub_rp in yield_files(rp.append(filename)):
yield sub_rp
for rp in yield_files(baserp):
if ((rp.isincfile() and rp.getinctime() < time) or
(rp.isdir() and not rp.listdir())):
Log("Deleting increment file %s" % rp.path, 5)
rp.delete()
class IncObj:
"""Increment object - represent a completed increment"""
def __init__(self, incrp):
"""IncObj initializer
incrp is an RPath of a path like increments.TIMESTR.dir
standing for the root of the increment.
"""
if not incrp.isincfile():
raise ManageException("%s is not an inc file" % incrp.path)
self.incrp = incrp
self.time = incrp.getinctime()
def getbaserp(self):
"""Return rp of the incrp without extensions"""
return self.incrp.getincbase()
def pretty_time(self):
"""Return a formatted version of inc's time"""
return Time.timetopretty(self.time)
def full_description(self):
"""Return string describing increment"""
s = ["Increment file %s" % self.incrp.path,
"Date: %s" % self.pretty_time()]
return "\n".join(s)
def ListIncrementSizes(mirror_root, index):
"""Return string summarizing the size of all the increments"""
stat_obj = statistics.StatsObj() # used for byte summary string
def get_total(rp_iter):
"""Return the total size of everything in rp_iter"""
total = 0
for rp in rp_iter: total += rp.getsize()
return total
def get_time_dict(inc_iter):
"""Return dictionary pairing times to total size of incs"""
time_dict = {}
for inc in inc_iter:
if not inc.isincfile(): continue
t = inc.getinctime()
if not time_dict.has_key(t): time_dict[t] = 0
time_dict[t] += inc.getsize()
return time_dict
def get_mirror_select():
"""Return iterator of mirror rpaths"""
mirror_base = mirror_root.new_index(index)
mirror_select = selection.Select(mirror_base)
if not index: # must exclude rdiff-backup-directory
mirror_select.parse_rbdir_exclude()
return mirror_select.set_iter()
def get_inc_select():
"""Return iterator of increment rpaths"""
inc_base = Globals.rbdir.append_path('increments', index)
for base_inc in restore.get_inclist(inc_base): yield base_inc
if inc_base.isdir():
inc_select = selection.Select(inc_base).set_iter()
for inc in inc_select: yield inc
def get_summary_triples(mirror_total, time_dict):
"""Return list of triples (time, size, cumulative size)"""
triples = []
cur_mir_base = Globals.rbdir.append('current_mirror')
mirror_time = restore.get_inclist(cur_mir_base)[0].getinctime()
triples.append((mirror_time, mirror_total, mirror_total))
inc_times = time_dict.keys()
inc_times.sort()
inc_times.reverse()
cumulative_size = mirror_total
for inc_time in inc_times:
size = time_dict[inc_time]
cumulative_size += size
triples.append((inc_time, size, cumulative_size))
return triples
def triple_to_line(triple):
"""Convert triple to display string"""
time, size, cum_size = triple
return "%24s %13s %15s" % \
(Time.timetopretty(time),
stat_obj.get_byte_summary_string(size),
stat_obj.get_byte_summary_string(cum_size))
mirror_total = get_total(get_mirror_select())
time_dict = get_time_dict(get_inc_select())
triples = get_summary_triples(mirror_total, time_dict)
l = ['%12s %9s %15s %20s' % ('Time', '', 'Size', 'Cumulative size'),
'-' * 77,
triple_to_line(triples[0]) + ' (current mirror)']
for triple in triples[1:]: l.append(triple_to_line(triple))
return '\n'.join(l)
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