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Diffstat (limited to 'rdiff-backup/src/Rdiff.py')
| -rw-r--r-- | rdiff-backup/src/Rdiff.py | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/rdiff-backup/src/Rdiff.py b/rdiff-backup/src/Rdiff.py deleted file mode 100644 index cc12cfc..0000000 --- a/rdiff-backup/src/Rdiff.py +++ /dev/null @@ -1,127 +0,0 @@ -# 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 - -"""Invoke rdiff utility to make signatures, deltas, or patch - -All these operations should be done in a relatively safe manner using -RobustAction and the like. - -""" - -import os, librsync - - -class RdiffException(Exception): pass - -def get_signature(rp): - """Take signature of rpin file and return in file object""" - Log("Getting signature of %s" % rp.path, 7) - return librsync.SigFile(rp.open("rb")) - -def get_delta_sigfileobj(sig_fileobj, rp_new): - """Like get_delta but signature is in a file object""" - Log("Getting delta of %s with signature stream" % (rp_new.path,), 7) - return librsync.DeltaFile(sig_fileobj, rp_new.open("rb")) - -def get_delta_sigrp(rp_signature, rp_new): - """Take signature rp and new rp, return delta file object""" - Log("Getting delta of %s with signature %s" % - (rp_new.path, rp_signature.path), 7) - return librsync.DeltaFile(rp_signature.open("rb"), rp_new.open("rb")) - -def write_delta_action(basis, new, delta, compress = None): - """Return action writing delta which brings basis to new - - If compress is true, the output of rdiff will be gzipped - before written to delta. - - """ - delta_tf = TempFileManager.new(delta) - def init(): write_delta(basis, new, delta_tf, compress) - return Robust.make_tf_robustaction(init, delta_tf, delta) - -def write_delta(basis, new, delta, compress = None): - """Write rdiff delta which brings basis to new""" - Log("Writing delta %s from %s -> %s" % - (basis.path, new.path, delta.path), 7) - sigfile = librsync.SigFile(basis.open("rb")) - deltafile = librsync.DeltaFile(sigfile, new.open("rb")) - delta.write_from_fileobj(deltafile, compress) - -def patch_action(rp_basis, rp_delta, rp_out = None, out_tf = None, - delta_compressed = None): - """Return RobustAction which patches rp_basis with rp_delta - - If rp_out is None, put output in rp_basis. Will use TempFile - out_tf it is specified. If delta_compressed is true, the - delta file will be decompressed before processing with rdiff. - - """ - if not rp_out: rp_out = rp_basis - if not out_tf: out_tf = TempFileManager.new(rp_out) - def init(): - rp_basis.conn.Rdiff.patch_local(rp_basis, rp_delta, - out_tf, delta_compressed) - out_tf.setdata() - return Robust.make_tf_robustaction(init, out_tf, rp_out) - -def patch_local(rp_basis, rp_delta, outrp, delta_compressed = None): - """Patch routine that must be run on rp_basis.conn - - This is because librsync may need to seek() around in rp_basis, - and so needs a real file. Other rpaths can be remote. - - """ - assert rp_basis.conn is Globals.local_connection - if delta_compressed: deltafile = rp_delta.open("rb", 1) - else: deltafile = rp_delta.open("rb") - - sigfile = librsync.SigFile(rp_basis.open("rb")) - patchfile = librsync.PatchedFile(rp_basis.open("rb"), deltafile) - outrp.write_from_fileobj(patchfile) - -def patch_with_attribs_action(rp_basis, rp_delta, rp_out = None): - """Like patch_action, but also transfers attributs from rp_delta""" - if not rp_out: rp_out = rp_basis - tf = TempFileManager.new(rp_out) - return Robust.chain_nested(patch_action(rp_basis, rp_delta, rp_out, tf), - Robust.copy_attribs_action(rp_delta, tf)) - -def copy_action(rpin, rpout): - """Use rdiff to copy rpin to rpout, conserving bandwidth""" - if not rpin.isreg() or not rpout.isreg() or rpin.conn is rpout.conn: - # rdiff not applicable, fallback to regular copying - return Robust.copy_action(rpin, rpout) - - Log("Rdiff copying %s to %s" % (rpin.path, rpout.path), 6) - out_tf = TempFileManager.new(rpout) - def init(): rpout.conn.Rdiff.copy_local(rpin, rpout, out_tf) - return Robust.make_tf_robustaction(init, out_tf, rpout) - -def copy_local(rpin, rpout, rpnew): - """Write rpnew == rpin using rpout as basis. rpout and rpnew local""" - assert rpnew.conn is rpout.conn is Globals.local_connection - sigfile = librsync.SigFile(rpout.open("rb")) - deltafile = rpin.conn.librsync.DeltaFile(sigfile, rpin.open("rb")) - rpnew.write_from_fileobj(librsync.PatchedFile(rpout.open("rb"), deltafile)) - - -from log import * -from robust import * - |