svn2svn/run/svn2svn.py

   1 """
   2 Replicate (replay) changesets from one SVN repository to another.
   3 """
   4
   5 from .. import base_version, full_version
   6 from .. import ui
   7 from .. import svnclient
   8 from ..shell import run_svn
   9 from ..errors import (ExternalCommandFailed, UnsupportedSVNAction, InternalError, VerificationError)
  10 from parse import HelpFormatter
  11
  12 import sys
  13 import os
  14 import time
  15 import traceback
  16 import shutil
  17 import operator
  18 import optparse
  19 import re
  20 from datetime import datetime
  21
  22 _valid_svn_actions = "MARD"   # The list of known SVN action abbr's, from "svn log"
  23
  24 # Module-level variables/parameters
  25 source_url = ""          # URL to source path in source SVN repo, e.g. 'http://server/svn/source/trunk'
  26 source_repos_url = ""    # URL to root of source SVN repo,        e.g. 'http://server/svn/source'
  27 source_base = ""         # Relative path of source_url in source SVN repo, e.g. '/trunk'
  28 source_repos_uuid = ""   # UUID of source SVN repo
  29 target_url =""           # URL to target path in target SVN repo, e.g. 'file:///svn/repo_target/trunk'
  30 rev_map = {}             # The running mapping-table dictionary for source_url rev #'s -> target_url rev #'s
  31 options = None           # optparser options
  32
  33 def parse_svn_commit_rev(output):
  34     """
  35     Parse the revision number from the output of "svn commit".
  36     """
  37     output_lines = output.strip("\n").split("\n")
  38     rev_num = None
  39     for line in output_lines:
  40         if line[0:19] == 'Committed revision ':
  41             rev_num = line[19:].rstrip('.')
  42             break
  43     assert rev_num is not None
  44     return int(rev_num)
  45
  46 def commit_from_svn_log_entry(log_entry, commit_paths=None, target_revprops=None):
  47     """
  48     Given an SVN log entry and an optional list of changed paths, do an svn commit.
  49     """
  50     # TODO: Run optional external shell hook here, for doing pre-commit filtering
  51     # Display the _wc_target "svn status" info if running in -vv (or higher) mode
  52     if ui.get_level() >= ui.EXTRA:
  53         ui.status(">> commit_from_svn_log_entry: Pre-commit _wc_target status:", level=ui.EXTRA, color='CYAN')
  54         ui.status(run_svn(["status"]), level=ui.EXTRA, color='CYAN')
  55     # This will use the local timezone for displaying commit times
  56     timestamp = int(log_entry['date'])
  57     svn_date = str(datetime.fromtimestamp(timestamp))
  58     # Uncomment this one one if you prefer UTC commit times
  59     #svn_date = "%d 0" % timestamp
  60     args = ["commit", "--force-log"]
  61     message = log_entry['message']
  62     if options.log_date:
  63         message += "\nDate: " + svn_date
  64     if options.log_author:
  65         message += "\nAuthor: " + log_entry['author']
  66     if options.keep_author:
  67         args += ["--username", log_entry['author']]
  68     args += ["-m", message]
  69     revprops = {}
  70     if log_entry['revprops']:
  71         # Carry forward any revprop's from the source revision
  72         for v in log_entry['revprops']:
  73             revprops[v['name']] = v['value']
  74     if target_revprops:
  75         # Add any extra revprop's we want to set for the target repo commits
  76         for v in target_revprops:
  77             revprops[v['name']] = v['value']
  78     if revprops:
  79         for key in revprops:
  80             args += ["--with-revprop", "%s=%s" % (key, str(revprops[key]))]
  81     if commit_paths:
  82         if len(commit_paths)<100:
  83             # If we don't have an excessive amount of individual changed paths, pass
  84             # those to the "svn commit" command. Else, pass nothing so we commit at
  85             # the root of the working-copy.
  86             args += list(commit_paths)
  87     rev_num = None
  88     if not options.dry_run:
  89         # Run the "svn commit" command, and screen-scrape the target_rev value (if any)
  90         output = run_svn(args)
  91         rev_num = parse_svn_commit_rev(output) if output else None
  92         if rev_num is not None:
  93             ui.status("Committed revision %s.", rev_num)
  94             if options.keep_date:
  95                 run_svn(["propset", "--revprop", "-r", rev_num, "svn:date", log_entry['date_raw']])
  96     return rev_num
  97
  98 def full_svn_revert():
  99     """
 100     Do an "svn revert" and proactively remove any extra files in the working copy.
 101     """
 102     run_svn(["revert", "--recursive", "."])
 103     output = run_svn(["status"])
 104     if output:
 105         output_lines = output.strip("\n").split("\n")
 106         for line in output_lines:
 107             if line[0] == "?":
 108                 path = line[4:].strip(" ")
 109                 if os.path.isfile(path):
 110                     os.remove(path)
 111                 if os.path.isdir(path):
 112                     shutil.rmtree(path)
 113
 114 def gen_tracking_revprops(source_rev):
 115     """
 116     Build an array of svn2svn-specific source-tracking revprops.
 117     """
 118     revprops = [{'name':'svn2svn:source_uuid', 'value':source_repos_uuid},
 119                 {'name':'svn2svn:source_url',  'value':source_url},
 120                 {'name':'svn2svn:source_rev',  'value':source_rev}]
 121     return revprops
 122
 123 def sync_svn_props(source_url, source_rev, path_offset):
 124     """
 125     Carry-forward any unversioned properties from the source repo to the
 126     target WC.
 127     """
 128     source_props = svnclient.get_all_props(source_url+"/"+path_offset,  source_rev)
 129     target_props = svnclient.get_all_props(path_offset)
 130     if 'svn:mergeinfo' in source_props:
 131         # Never carry-forward "svn:mergeinfo"
 132         del source_props['svn:mergeinfo']
 133     for prop in target_props:
 134         if prop not in source_props:
 135             # Remove any properties which exist in target but not source
 136             run_svn(["propdel", prop, path_offset])
 137     for prop in source_props:
 138         if prop not in target_props or \
 139            source_props[prop] != target_props[prop]:
 140             # Set/update any properties which exist in source but not target or
 141             # whose value differs between source vs. target.
 142             run_svn(["propset", prop, source_props[prop], path_offset])
 143
 144 def in_svn(p, require_in_repo=False, prefix=""):
 145     """
 146     Check if a given file/folder is being tracked by Subversion.
 147     Prior to SVN 1.6, we could "cheat" and look for the existence of ".svn" directories.
 148     With SVN 1.7 and beyond, WC-NG means only a single top-level ".svn" at the root of the working-copy.
 149     Use "svn status" to check the status of the file/folder.
 150     """
 151     entries = svnclient.get_svn_status(p, no_recursive=True)
 152     if not entries:
 153         return False
 154     d = entries[0]
 155     if require_in_repo and (d['status'] == 'added' or d['revision'] is None):
 156         # If caller requires this path to be in the SVN repo, prevent returning True
 157         # for paths that are only locally-added.
 158         ret = False
 159     else:
 160         # Don't consider files tracked as deleted in the WC as under source-control.
 161         # Consider files which are locally added/copied as under source-control.
 162         ret = True if not (d['status'] == 'deleted') and (d['type'] == 'normal' or d['status'] == 'added' or d['copied'] == 'true') else False
 163     ui.status(prefix + ">> in_svn('%s', require_in_repo=%s) --> %s", p, str(require_in_repo), str(ret), level=ui.DEBUG, color='GREEN')
 164     return ret
 165
 166 def is_child_path(path, p_path):
 167     return True if (path == p_path) or (path.startswith(p_path+"/")) else False
 168
 169 def find_svn_ancestors(svn_repos_url, base_path, source_path, source_rev, prefix = ""):
 170     """
 171     Given a source path, walk the SVN history backwards to inspect the ancestory of
 172     that path, seeing if it traces back to base_path.  Build an array of copyfrom_path
 173     and copyfrom_revision pairs for each of the "svn copies". If we find a copyfrom_path
 174     which base_path is a substring match of (e.g. we crawled back to the initial branch-
 175     copy from trunk), then return the collection of ancestor paths.  Otherwise,
 176     copyfrom_path has no ancestory compared to base_path.
 177
 178     This is useful when comparing "trunk" vs. "branch" paths, to handle cases where a
 179     file/folder was renamed in a branch and then that branch was merged back to trunk.
 180
 181     'svn_repos_url' is the full URL to the root of the SVN repository,
 182       e.g. 'file:///path/to/repo'
 183     'base_path' is the path in the SVN repo to the target path we're trying to
 184       trace ancestry back to, e.g. '/trunk'.
 185     'source_path' is the path in the SVN repo to the source path to start checking
 186       ancestry at, e.g. '/branches/fix1/projectA/file1.txt'.
 187       (full_path = svn_repos_url+base_path+"/"+path_offset)
 188     'source_rev' is the revision to start walking the history of source_path backwards from.
 189     """
 190     ui.status(prefix + ">> find_svn_ancestors: Start: (%s) source_path: %s  base_path: %s",
 191         svn_repos_url, source_path+"@"+str(source_rev), base_path, level=ui.DEBUG, color='YELLOW')
 192     done = False
 193     working_path = base_path+"/"+source_path
 194     working_rev  = source_rev
 195     first_iter_done = False
 196     ancestors_temp = []
 197     while not done:
 198         # Get the first "svn log" entry for this path (relative to @rev)
 199         ui.status(prefix + ">> find_svn_ancestors: %s", svn_repos_url + working_path+"@"+str(working_rev), level=ui.DEBUG, color='YELLOW')
 200         log_entry = svnclient.get_first_svn_log_entry(svn_repos_url + working_path, 1, working_rev, True)
 201         if not log_entry:
 202             ui.status(prefix + ">> find_svn_ancestors: Done: no log_entry", level=ui.DEBUG, color='YELLOW')
 203             done = True
 204             break
 205         # If we found a copy-from case which matches our base_path, we're done.
 206         # ...but only if we've at least tried to search for the first copy-from path.
 207         if first_iter_done and is_child_path(working_path, base_path):
 208             ui.status(prefix + ">> find_svn_ancestors: Done: Found is_child_path(working_path, base_path) and first_iter_done=True", level=ui.DEBUG, color='YELLOW')
 209             done = True
 210             break
 211         first_iter_done = True
 212         # Search for any actions on our target path (or parent paths).
 213         changed_paths_temp = []
 214         for d in log_entry['changed_paths']:
 215             path = d['path']
 216             if is_child_path(working_path, path):
 217                 changed_paths_temp.append({'path': path, 'data': d})
 218         if not changed_paths_temp:
 219             # If no matches, then we've hit the end of the chain and this path has no ancestry back to base_path.
 220             ui.status(prefix + ">> find_svn_ancestors: Done: No matching changed_paths", level=ui.DEBUG, color='YELLOW')
 221             done = True
 222             continue
 223         # Reverse-sort any matches, so that we start with the most-granular (deepest in the tree) path.
 224         changed_paths = sorted(changed_paths_temp, key=operator.itemgetter('path'), reverse=True)
 225         # Find the action for our working_path in this revision. Use a loop to check in reverse order,
 226         # so that if the target file/folder is "M" but has a parent folder with an "A" copy-from.
 227         for v in changed_paths:
 228             d = v['data']
 229             path = d['path']
 230             # Check action-type for this file
 231             action = d['action']
 232             if action not in _valid_svn_actions:
 233                 raise UnsupportedSVNAction("In SVN rev. %d: action '%s' not supported. Please report a bug!"
 234                     % (log_entry['revision'], action))
 235             ui.status(prefix + "> %s %s%s", action, path,
 236                 (" (from %s)" % (d['copyfrom_path']+"@"+str(d['copyfrom_revision']))) if d['copyfrom_path'] else "",
 237                 level=ui.DEBUG, color='YELLOW')
 238             if action == 'D':
 239                 # If file/folder was deleted, it has no ancestor
 240                 ancestors_temp = []
 241                 ui.status(prefix + ">> find_svn_ancestors: Done: deleted", level=ui.DEBUG, color='YELLOW')
 242                 done = True
 243                 break
 244             if action in 'RA':
 245                 # If file/folder was added/replaced but not a copy, it has no ancestor
 246                 if not d['copyfrom_path']:
 247                     ancestors_temp = []
 248                     ui.status(prefix + ">> find_svn_ancestors: Done: %s with no copyfrom_path",
 249                         "Added" if action == "A" else "Replaced",
 250                         level=ui.DEBUG, color='YELLOW')
 251                     done = True
 252                     break
 253                 # Else, file/folder was added/replaced and is a copy, so add an entry to our ancestors list
 254                 # and keep checking for ancestors
 255                 ui.status(prefix + ">> find_svn_ancestors: Found copy-from (action=%s): %s --> %s",
 256                     action, path, d['copyfrom_path']+"@"+str(d['copyfrom_revision']),
 257                     level=ui.DEBUG, color='YELLOW')
 258                 ancestors_temp.append({'path': path, 'revision': log_entry['revision'],
 259                                        'copyfrom_path': d['copyfrom_path'], 'copyfrom_rev': d['copyfrom_revision']})
 260                 working_path = working_path.replace(d['path'], d['copyfrom_path'])
 261                 working_rev =  d['copyfrom_revision']
 262                 # Follow the copy and keep on searching
 263                 break
 264     ancestors = []
 265     if ancestors_temp:
 266         ancestors.append({'path': base_path+"/"+source_path, 'revision': source_rev})
 267         working_path = base_path+"/"+source_path
 268         for idx in range(len(ancestors_temp)):
 269             d = ancestors_temp[idx]
 270             working_path = working_path.replace(d['path'], d['copyfrom_path'])
 271             working_rev =  d['copyfrom_rev']
 272             ancestors.append({'path': working_path, 'revision': working_rev})
 273         if ui.get_level() >= ui.DEBUG:
 274             max_len = 0
 275             for idx in range(len(ancestors)):
 276                 d = ancestors[idx]
 277                 max_len = max(max_len, len(d['path']+"@"+str(d['revision'])))
 278             ui.status(prefix + ">> find_svn_ancestors: Found parent ancestors:", level=ui.DEBUG, color='YELLOW_B')
 279             for idx in range(len(ancestors)-1):
 280                 d = ancestors[idx]
 281                 d_next = ancestors[idx+1]
 282                 ui.status(prefix + " [%s] %s <-- %s", idx,
 283                     str(d['path']+"@"+str(d['revision'])).ljust(max_len),
 284                     str(d_next['path']+"@"+str(d_next['revision'])).ljust(max_len),
 285                     level=ui.DEBUG, color='YELLOW')
 286     else:
 287         ui.status(prefix + ">> find_svn_ancestors: No ancestor-chain found: %s",
 288             svn_repos_url+base_path+"/"+source_path+"@"+str(source_rev), level=ui.DEBUG, color='YELLOW')
 289     return ancestors
 290
 291 def get_rev_map(source_rev, prefix):
 292     """
 293     Find the equivalent rev # in the target repo for the given rev # from the source repo.
 294     """
 295     ui.status(prefix + ">> get_rev_map(%s)", source_rev, level=ui.DEBUG, color='GREEN')
 296     # Find the highest entry less-than-or-equal-to source_rev
 297     for rev in range(int(source_rev), 0, -1):
 298         in_rev_map = True if rev in rev_map else False
 299         ui.status(prefix + ">> get_rev_map: rev=%s  in_rev_map=%s", rev, str(in_rev_map), level=ui.DEBUG, color='BLACK_B')
 300         if in_rev_map:
 301             return int(rev_map[rev])
 302     # Else, we fell off the bottom of the rev_map. Ruh-roh...
 303     return None
 304
 305 def set_rev_map(source_rev, target_rev):
 306     ui.status(">> set_rev_map: source_rev=%s target_rev=%s", source_rev, target_rev, level=ui.DEBUG, color='GREEN')
 307     global rev_map
 308     rev_map[int(source_rev)]=int(target_rev)
 309
 310 def build_rev_map(target_url, target_end_rev, source_info):
 311     """
 312     Check for any already-replayed history from source_url (source_info) and
 313     build the mapping-table of source_rev -> target_rev.
 314     """
 315     global rev_map
 316     rev_map = {}
 317     ui.status("Rebuilding target_rev -> source_rev rev_map...", level=ui.VERBOSE)
 318     proc_count = 0
 319     it_log_entries = svnclient.iter_svn_log_entries(target_url, 1, target_end_rev, get_changed_paths=False, get_revprops=True)
 320     for log_entry in it_log_entries:
 321         if log_entry['revprops']:
 322             revprops = {}
 323             for v in log_entry['revprops']:
 324                 if v['name'].startswith('svn2svn:'):
 325                     revprops[v['name']] = v['value']
 326             if revprops and \
 327                revprops['svn2svn:source_uuid'] == source_info['repos_uuid'] and \
 328                revprops['svn2svn:source_url'] == source_info['url']:
 329                 source_rev = revprops['svn2svn:source_rev']
 330                 target_rev = log_entry['revision']
 331                 set_rev_map(source_rev, target_rev)
 332                 proc_count += 1
 333                 if proc_count % 500 == 0:
 334                     ui.status("...processed %s (%s of %s)..." % (proc_count, target_rev, target_end_rev), level=ui.VERBOSE)
 335
 336 def get_svn_dirlist(svn_path, rev_number = ""):
 337     """
 338     Get a list of all the child contents (recusive) of the given folder path.
 339     """
 340     args = ["list"]
 341     path = svn_path
 342     if rev_number:
 343         args += ["-r", rev_number]
 344         path += "@"+str(rev_number)
 345     args += [path]
 346     paths = run_svn(args, no_fail=True)
 347     paths = paths.strip("\n").split("\n") if len(paths)>1 else []
 348     return paths
 349
 350 def path_in_list(paths, path):
 351     for p in paths:
 352         if is_child_path(path, p):
 353             return True
 354     return False
 355
 356 def add_path(paths, path):
 357     if not path_in_list(paths, path):
 358         paths.append(path)
 359
 360 def do_svn_add(path_offset, source_rev, parent_copyfrom_path="", parent_copyfrom_rev="", \
 361                export_paths={}, is_dir = False, skip_paths=[], prefix = ""):
 362     """
 363     Given the add'd source path, replay the "svn add/copy" commands to correctly
 364     track renames across copy-from's.
 365
 366     For example, consider a sequence of events like this:
 367     1. svn copy /trunk /branches/fix1
 368     2. (Make some changes on /branches/fix1)
 369     3. svn mv /branches/fix1/Proj1 /branches/fix1/Proj2  " Rename folder
 370     4. svn mv /branches/fix1/Proj2/file1.txt /branches/fix1/Proj2/file2.txt  " Rename file inside renamed folder
 371     5. svn co /trunk && svn merge /branches/fix1
 372     After the merge and commit, "svn log -v" with show a delete of /trunk/Proj1
 373     and and add of /trunk/Proj2 copy-from /branches/fix1/Proj2. If we were just
 374     to do a straight "svn export+add" based on the /branches/fix1/Proj2 folder,
 375     we'd lose the logical history that Proj2/file2.txt is really a descendant
 376     of Proj1/file1.txt.
 377
 378     'path_offset' is the offset from source_base to the file to check ancestry for,
 379       e.g. 'projectA/file1.txt'. path = source_repos_url + source_base + path_offset.
 380     'source_rev' is the revision ("svn log") that we're processing from the source repo.
 381     'parent_copyfrom_path' and 'parent_copyfrom_rev' is the copy-from path of the parent
 382       directory, when being called recursively by do_svn_add_dir().
 383     'export_paths' is the list of path_offset's that we've deferred running "svn export" on.
 384     'is_dir' is whether path_offset is a directory (rather than a file).
 385     """
 386     ui.status(prefix + ">> do_svn_add: %s  %s", source_base+"/"+path_offset+"@"+str(source_rev),
 387         "  (parent-copyfrom: "+parent_copyfrom_path+"@"+str(parent_copyfrom_rev)+")" if parent_copyfrom_path else "",
 388         level=ui.DEBUG, color='GREEN')
 389     # Check if the given path has ancestors which chain back to the current source_base
 390     found_ancestor = False
 391     ancestors = find_svn_ancestors(source_repos_url, source_base, path_offset, source_rev, prefix+"  ")
 392     # ancestors[n] is the original (pre-branch-copy) trunk path.
 393     # ancestors[n-1] is the first commit on the new branch.
 394     copyfrom_path = ancestors[len(ancestors)-1]['path']     if ancestors else ""
 395     copyfrom_rev  = ancestors[len(ancestors)-1]['revision'] if ancestors else ""
 396     if ancestors:
 397         # The copy-from path has ancestory back to source_url.
 398         ui.status(prefix + ">> do_svn_add: Check copy-from: Found parent: %s", copyfrom_path+"@"+str(copyfrom_rev),
 399             level=ui.DEBUG, color='GREEN', bold=True)
 400         found_ancestor = True
 401         # Map the copyfrom_rev (source repo) to the equivalent target repo rev #. This can
 402         # return None in the case where copyfrom_rev is *before* our source_start_rev.
 403         tgt_rev = get_rev_map(copyfrom_rev, prefix+"  ")
 404         ui.status(prefix + ">> do_svn_add: get_rev_map: %s (source) -> %s (target)", copyfrom_rev, tgt_rev, level=ui.DEBUG, color='GREEN')
 405     else:
 406         ui.status(prefix + ">> do_svn_add: Check copy-from: No ancestor chain found.", level=ui.DEBUG, color='GREEN')
 407         found_ancestor = False
 408     if found_ancestor and tgt_rev:
 409         # Check if this path_offset in the target WC already has this ancestry, in which
 410         # case there's no need to run the "svn copy" (again).
 411         path_in_svn = in_svn(path_offset, prefix=prefix+"  ")
 412         log_entry = svnclient.get_last_svn_log_entry(path_offset, 1, 'HEAD', get_changed_paths=False) if in_svn(path_offset, require_in_repo=True, prefix=prefix+"  ") else []
 413         if (not log_entry or (log_entry['revision'] != tgt_rev)):
 414             copyfrom_offset = copyfrom_path[len(source_base):].strip('/')
 415             ui.status(prefix + ">> do_svn_add: svn_copy: Copy-from: %s", copyfrom_path+"@"+str(copyfrom_rev), level=ui.DEBUG, color='GREEN')
 416             ui.status(prefix + "   copyfrom: %s", copyfrom_path+"@"+str(copyfrom_rev), level=ui.DEBUG, color='GREEN')
 417             ui.status(prefix + " p_copyfrom: %s", parent_copyfrom_path+"@"+str(parent_copyfrom_rev) if parent_copyfrom_path else "", level=ui.DEBUG, color='GREEN')
 418             if path_in_svn and \
 419                ((parent_copyfrom_path and is_child_path(copyfrom_path, parent_copyfrom_path)) and \
 420                 (parent_copyfrom_rev and copyfrom_rev == parent_copyfrom_rev)):
 421                 # When being called recursively, if this child entry has the same ancestor as the
 422                 # the parent, then no need to try to run another "svn copy".
 423                 ui.status(prefix + ">> do_svn_add: svn_copy: Same ancestry as parent: %s",
 424                     parent_copyfrom_path+"@"+str(parent_copyfrom_rev),level=ui.DEBUG, color='GREEN')
 425                 pass
 426             else:
 427                 # Copy this path from the equivalent path+rev in the target repo, to create the
 428                 # equivalent history.
 429                 if parent_copyfrom_path:
 430                     # If we have a parent copy-from path, we mis-match that so display a status
 431                     # message describing the action we're mimic'ing. If path_in_svn, then this
 432                     # is logically a "replace" rather than an "add".
 433                     ui.status(" %s %s (from %s)", ('R' if path_in_svn else 'A'), source_base+"/"+path_offset, ancestors[1]['path']+"@"+str(copyfrom_rev), level=ui.VERBOSE)
 434                 if path_in_svn:
 435                     # If local file is already under version-control, then this is a replace.
 436                     ui.status(prefix + ">> do_svn_add: pre-copy: local path already exists: %s", path_offset, level=ui.DEBUG, color='GREEN')
 437                     run_svn(["remove", "--force", path_offset])
 438                 run_svn(["copy", "-r", tgt_rev, target_url+"/"+copyfrom_offset+"@"+str(tgt_rev), path_offset])
 439                 if is_dir:
 440                     # Export the final verison of all files in this folder.
 441                     add_path(export_paths, path_offset)
 442                 else:
 443                     # Export the final verison of this file.
 444                     run_svn(["export", "--force", "-r", source_rev,
 445                              source_repos_url+source_base+"/"+path_offset+"@"+str(source_rev), path_offset])
 446                 if options.keep_prop:
 447                     sync_svn_props(source_url, source_rev, path_offset)
 448         else:
 449             ui.status(prefix + ">> do_svn_add: Skipped 'svn copy': %s", path_offset, level=ui.DEBUG, color='GREEN')
 450     else:
 451         # Else, either this copy-from path has no ancestry back to source_url OR copyfrom_rev comes
 452         # before our initial source_start_rev (i.e. tgt_rev == None), so can't do a "svn copy".
 453         # Create (parent) directory if needed.
 454         # TODO: This is (nearly) a duplicate of code in process_svn_log_entry(). Should this be
 455         #       split-out to a shared tag?
 456         p_path = path_offset if is_dir else os.path.dirname(path_offset).strip() or '.'
 457         if not os.path.exists(p_path):
 458             run_svn(["mkdir", p_path])
 459         if not in_svn(path_offset, prefix=prefix+"  "):
 460             if is_dir:
 461                 # Export the final verison of all files in this folder.
 462                 add_path(export_paths, path_offset)
 463             else:
 464                 # Export the final verison of this file. We *need* to do this before running
 465                 # the "svn add", even if we end-up re-exporting this file again via export_paths.
 466                 run_svn(["export", "--force", "-r", source_rev,
 467                          source_repos_url+source_base+"/"+path_offset+"@"+str(source_rev), path_offset])
 468             # If not already under version-control, then "svn add" this file/folder.
 469             run_svn(["add", "--parents", path_offset])
 470         if options.keep_prop:
 471             sync_svn_props(source_url, source_rev, path_offset)
 472     if is_dir:
 473         # For any folders that we process, process any child contents, so that we correctly
 474         # replay copies/replaces/etc.
 475         do_svn_add_dir(path_offset, source_rev, copyfrom_path, copyfrom_rev, export_paths, skip_paths, prefix+"  ")
 476
 477 def do_svn_add_dir(path_offset, source_rev, parent_copyfrom_path, parent_copyfrom_rev, \
 478                    export_paths, skip_paths, prefix=""):
 479     # Get the directory contents, to compare between the local WC (target_url) vs. the remote repo (source_url)
 480     # TODO: paths_local won't include add'd paths because "svn ls" lists the contents of the
 481     #       associated remote repo folder. (Is this a problem?)
 482     paths_local =  get_svn_dirlist(path_offset)
 483     paths_remote = get_svn_dirlist(source_url+"/"+path_offset, source_rev)
 484     ui.status(prefix + ">> do_svn_add_dir: paths_local:  %s", str(paths_local),  level=ui.DEBUG, color='GREEN')
 485     ui.status(prefix + ">> do_svn_add_dir: paths_remote: %s", str(paths_remote), level=ui.DEBUG, color='GREEN')
 486     # Update files/folders which exist in remote but not local
 487     for path in paths_remote:
 488         path_is_dir = True if path[-1] == "/" else False
 489         working_path = path_offset+"/"+(path.rstrip('/') if path_is_dir else path)
 490         if not working_path in skip_paths:
 491             do_svn_add(working_path, source_rev, parent_copyfrom_path, parent_copyfrom_rev,
 492                        export_paths, path_is_dir, skip_paths, prefix+"  ")
 493     # Remove files/folders which exist in local but not remote
 494     for path in paths_local:
 495         if not path in paths_remote:
 496             ui.status(" %s %s", 'D', source_base+"/"+path_offset+"/"+path, level=ui.VERBOSE)
 497             run_svn(["remove", "--force", path_offset+"/"+path])
 498             # TODO: Does this handle deleted folders too? Wouldn't want to have a case
 499             #       where we only delete all files from folder but leave orphaned folder around.
 500
 501 def process_svn_log_entry(log_entry, commit_paths, prefix = ""):
 502     """
 503     Process SVN changes from the given log entry. Build an array (commit_paths)
 504     of the paths in the working-copy that were changed, i.e. the paths which
 505     we'll pass to "svn commit".
 506     """
 507     export_paths = []
 508     source_rev = log_entry['revision']
 509     ui.status(prefix + ">> process_svn_log_entry: %s", source_url+"@"+str(source_rev), level=ui.DEBUG, color='GREEN')
 510     for d in log_entry['changed_paths']:
 511         # Get the full path for this changed_path
 512         # e.g. '/branches/bug123/projectA/file1.txt'
 513         path = d['path']
 514         if not is_child_path(path, source_base):
 515             # Ignore changed files that are not part of this subdir
 516             ui.status(prefix + ">> process_svn_log_entry: Unrelated path: %s  (base: %s)", path, source_base, level=ui.DEBUG, color='GREEN')
 517             continue
 518         if d['kind'] == "" or d['kind'] == 'none':
 519             # The "kind" value was introduced in SVN 1.6, and "svn log --xml" won't return a "kind"
 520             # value for commits made on a pre-1.6 repo, even if the server is now running 1.6.
 521             # We need to use other methods to fetch the node-kind for these cases.
 522             d['kind'] = svnclient.get_kind(source_repos_url, path, source_rev, d['action'], log_entry['changed_paths'])
 523         assert (d['kind'] == 'file') or (d['kind'] == 'dir')
 524         path_is_dir =  True if d['kind'] == 'dir'  else False
 525         path_is_file = True if d['kind'] == 'file' else False
 526         # Calculate the offset (based on source_base) for this changed_path
 527         # e.g. 'projectA/file1.txt'
 528         # (path = source_base + "/" + path_offset)
 529         path_offset = path[len(source_base):].strip("/")
 530         # Get the action for this path
 531         action = d['action']
 532         if action not in _valid_svn_actions:
 533             raise UnsupportedSVNAction("In SVN rev. %d: action '%s' not supported. Please report a bug!"
 534                 % (source_rev, action))
 535         ui.status(" %s %s%s", action, d['path'],
 536             (" (from %s)" % (d['copyfrom_path']+"@"+str(d['copyfrom_revision']))) if d['copyfrom_path'] else "",
 537             level=ui.VERBOSE)
 538
 539         # Try to be efficient and keep track of an explicit list of paths in the
 540         # working copy that changed. If we commit from the root of the working copy,
 541         # then SVN needs to crawl the entire working copy looking for pending changes.
 542         commit_paths.append(path_offset)
 543
 544         # Special-handling for replace's
 545         if action == 'R':
 546             # If file was "replaced" (deleted then re-added, all in same revision),
 547             # then we need to run the "svn rm" first, then change action='A'. This
 548             # lets the normal code below handle re-"svn add"'ing the files. This
 549             # should replicate the "replace".
 550             if in_svn(path_offset):
 551                 # Target path might not be under version-control yet, e.g. parent "add"
 552                 # was a copy-from a branch which had no ancestry back to trunk, and each
 553                 # child folder under that parent folder is a "replace" action on the final
 554                 # merge to trunk. Since the child folders will be in skip_paths, do_svn_add
 555                 # wouldn't have created them while processing the parent "add" path.
 556                 run_svn(["remove", "--force", path_offset])
 557             action = 'A'
 558
 559         # Handle all the various action-types
 560         # (Handle "add" first, for "svn copy/move" support)
 561         if action == 'A':
 562             # Determine where to export from.
 563             svn_copy = False
 564             # Handle cases where this "add" was a copy from another URL in the source repo
 565             if d['copyfrom_revision']:
 566                 copyfrom_path = d['copyfrom_path']
 567                 copyfrom_rev =  d['copyfrom_revision']
 568                 skip_paths = []
 569                 for tmp_d in log_entry['changed_paths']:
 570                     tmp_path = tmp_d['path']
 571                     if is_child_path(tmp_path, path) and tmp_d['action'] in 'ARD':
 572                         # Build list of child entries which are also in the changed_paths list,
 573                         # so that do_svn_add() can skip processing these entries when recursing
 574                         # since we'll end-up processing them later. Don't include action="M" paths
 575                         # in this list because it's non-conclusive: it could just mean that the
 576                         # file was modified *after* the copy-from, so we still want do_svn_add()
 577                         # to re-create the correct ancestry.
 578                         tmp_path_offset = tmp_path[len(source_base):].strip("/")
 579                         skip_paths.append(tmp_path_offset)
 580                 do_svn_add(path_offset, source_rev, "", "", export_paths, path_is_dir, skip_paths, prefix+"  ")
 581             # Else just "svn export" the files from the source repo and "svn add" them.
 582             else:
 583                 # Create (parent) directory if needed
 584                 p_path = path_offset if path_is_dir else os.path.dirname(path_offset).strip() or '.'
 585                 if not os.path.exists(p_path):
 586                     run_svn(["mkdir", p_path])
 587                 # Export the entire added tree.
 588                 if path_is_dir:
 589                     # For directories, defer the (recurisve) "svn export". Might have a
 590                     # situation in a branch merge where the entry in the svn-log is a
 591                     # non-copy-from'd "add" but there are child contents (that we haven't
 592                     # gotten to yet in log_entry) that are copy-from's.  When we try do
 593                     # the "svn copy" later on in do_svn_add() for those copy-from'd paths,
 594                     # having pre-existing (svn-add'd) contents creates some trouble.
 595                     # Instead, just create the stub folders ("svn mkdir" above) and defer
 596                     # exporting the final file-state until the end.
 597                     add_path(export_paths, path_offset)
 598                 else:
 599                     # Export the final verison of this file. We *need* to do this before running
 600                     # the "svn add", even if we end-up re-exporting this file again via export_paths.
 601                     run_svn(["export", "--force", "-r", source_rev,
 602                              source_url+"/"+path_offset+"@"+str(source_rev), path_offset])
 603                 if not in_svn(path_offset, prefix=prefix+"  "):
 604                     # Need to use in_svn here to handle cases where client committed the parent
 605                     # folder and each indiv sub-folder.
 606                     run_svn(["add", "--parents", path_offset])
 607                 if options.keep_prop:
 608                     sync_svn_props(source_url, source_rev, path_offset)
 609
 610         elif action == 'D':
 611             run_svn(["remove", "--force", path_offset])
 612
 613         elif action == 'M':
 614             if path_is_file:
 615                 run_svn(["export", "--force", "-N" , "-r", source_rev,
 616                          source_url+"/"+path_offset+"@"+str(source_rev), path_offset])
 617             if options.keep_prop:
 618                 sync_svn_props(source_url, source_rev, path_offset)
 619
 620         else:
 621             raise InternalError("Internal Error: process_svn_log_entry: Unhandled 'action' value: '%s'"
 622                 % action)
 623
 624     # Export the final version of all add'd paths from source_url
 625     if export_paths:
 626         for path_offset in export_paths:
 627             run_svn(["export", "--force", "-r", source_rev,
 628                      source_url+"/"+path_offset+"@"+str(source_rev), path_offset])
 629
 630 def keep_revnum(source_rev, target_rev_last, wc_target_tmp):
 631     """
 632     Add "padding" target revisions as needed to keep source and target
 633     revision #'s identical.
 634     """
 635     if int(source_rev) <= int(target_rev_last):
 636         raise InternalError("keep-revnum mode is enabled, "
 637             "but source revision (r%s) is less-than-or-equal last target revision (r%s)" % \
 638             (source_rev, target_rev_last))
 639     if int(target_rev_last) < int(source_rev)-1:
 640         # Add "padding" target revisions to keep source and target rev #'s identical
 641         if os.path.exists(wc_target_tmp):
 642             shutil.rmtree(wc_target_tmp)
 643         run_svn(["checkout", "-r", "HEAD", "--depth=empty", target_repos_url, wc_target_tmp])
 644         for rev_num in range(int(target_rev_last)+1, int(source_rev)):
 645             run_svn(["propset", "svn2svn:keep-revnum", rev_num, wc_target_tmp])
 646             output = run_svn(["commit", "-m", "", wc_target_tmp])
 647             rev_num_tmp = parse_svn_commit_rev(output) if output else None
 648             assert rev_num == rev_num_tmp
 649             ui.status("Committed revision %s (keep-revnum).", rev_num)
 650             target_rev_last = rev_num
 651         shutil.rmtree(wc_target_tmp)
 652         # Update our target working-copy, to ensure everything says it's at the new HEAD revision
 653         run_svn(["update"])
 654     return target_rev_last
 655
 656 def disp_svn_log_summary(log_entry):
 657     ui.status("------------------------------------------------------------------------")
 658     ui.status("r%s | %s | %s",
 659         log_entry['revision'],
 660         log_entry['author'],
 661         str(datetime.fromtimestamp(int(log_entry['date'])).isoformat(' ')))
 662     ui.status(log_entry['message'])
 663
 664 def real_main(args, parser):
 665     global source_url, target_url, rev_map
 666     source_url = args.pop(0).rstrip("/")    # e.g. 'http://server/svn/source/trunk'
 667     target_url = args.pop(0).rstrip("/")    # e.g. 'file:///svn/target/trunk'
 668     ui.status("options: %s", str(options), level=ui.DEBUG, color='GREEN')
 669
 670     # Make sure that both the source and target URL's are valid
 671     source_info = svnclient.get_svn_info(source_url)
 672     assert is_child_path(source_url, source_info['repos_url'])
 673     target_info = svnclient.get_svn_info(target_url)
 674     assert is_child_path(target_url, target_info['repos_url'])
 675
 676     # Init global vars
 677     global source_repos_url,source_base,source_repos_uuid
 678     source_repos_url = source_info['repos_url']       # e.g. 'http://server/svn/source'
 679     source_base = source_url[len(source_repos_url):]  # e.g. '/trunk'
 680     source_repos_uuid = source_info['repos_uuid']
 681     global target_repos_url
 682     target_repos_url = target_info['repos_url']
 683
 684     # Init start and end revision
 685     try:
 686         source_start_rev = svnclient.get_svn_rev(source_repos_url, options.rev_start if options.rev_start else 1)
 687     except ExternalCommandFailed:
 688         parser.error("invalid start source revision value: %s" % (options.rev_start))
 689     try:
 690         source_end_rev   = svnclient.get_svn_rev(source_repos_url, options.rev_end   if options.rev_end   else "HEAD")
 691     except ExternalCommandFailed:
 692         parser.error("invalid end source revision value: %s" % (options.rev_end))
 693     ui.status("Using source revision range %s:%s", source_start_rev, source_end_rev, level=ui.VERBOSE)
 694
 695     # TODO: If options.keep_date, should we try doing a "svn propset" on an *existing* revision
 696     #       as a sanity check, so we check if the pre-revprop-change hook script is correctly setup
 697     #       before doing first replay-commit?
 698
 699     target_rev_last =  target_info['revision']   # Last revision # in the target repo
 700     wc_target = os.path.abspath('_wc_target')
 701     wc_target_tmp = os.path.abspath('_tmp_wc_target')
 702     num_entries_proc = 0
 703     commit_count = 0
 704     source_rev = None
 705     target_rev = None
 706
 707     # Check out a working copy of target_url if needed
 708     wc_exists = os.path.exists(wc_target)
 709     if wc_exists and not options.cont_from_break:
 710         shutil.rmtree(wc_target)
 711         wc_exists = False
 712     if not wc_exists:
 713         ui.status("Checking-out _wc_target...", level=ui.VERBOSE)
 714         svnclient.svn_checkout(target_url, wc_target)
 715     os.chdir(wc_target)
 716
 717     if not options.cont_from_break:
 718         # TODO: Warn user if trying to start (non-continue) into a non-empty target path?
 719         # Get the first log entry at/after source_start_rev, which is where
 720         # we'll do the initial import from.
 721         it_log_start = svnclient.iter_svn_log_entries(source_url, source_start_rev, source_end_rev, get_changed_paths=False)
 722         for source_start_log in it_log_start:
 723             break
 724         if not source_start_log:
 725             raise InternalError("Unable to find any matching revisions between %s:%s in source_url: %s" % \
 726                 (source_start_rev, source_end_rev, source_url))
 727
 728         # This is the revision we will start from for source_url
 729         source_start_rev = source_rev = int(source_start_log['revision'])
 730         ui.status("Starting at source revision %s.", source_start_rev, level=ui.VERBOSE)
 731         ui.status("")
 732         if options.keep_revnum and source_rev > target_rev_last:
 733             target_rev_last = keep_revnum(source_rev, target_rev_last, wc_target_tmp)
 734
 735         # For the initial commit to the target URL, export all the contents from
 736         # the source URL at the start-revision.
 737         disp_svn_log_summary(svnclient.get_one_svn_log_entry(source_url, source_rev, source_rev))
 738         # Export and add file-contents from source_url@source_start_rev
 739         top_paths = run_svn(["list", "-r", source_rev, source_url+"@"+str(source_rev)])
 740         top_paths = top_paths.strip("\n").split("\n")
 741         for path in top_paths:
 742             # For each top-level file/folder...
 743             if not path:
 744                 continue
 745             # Directories have a trailing slash in the "svn list" output
 746             path_is_dir = True if path[-1] == "/" else False
 747             path_offset = path.rstrip('/') if path_is_dir else path
 748             if in_svn(path_offset, prefix="  "):
 749                 raise InternalError("Cannot replay history on top of pre-existing structure: %s" % source_url+"/"+path_offset)
 750             if path_is_dir and not os.path.exists(path_offset):
 751                 os.makedirs(path_offset)
 752             run_svn(["export", "--force", "-r" , source_rev, source_url+"/"+path_offset+"@"+str(source_rev), path_offset])
 753             run_svn(["add", path_offset])
 754         # Update any properties on the newly added content
 755         paths = run_svn(["list", "--recursive", "-r", source_rev, source_url+"@"+str(source_rev)])
 756         paths = paths.strip("\n").split("\n")
 757         if options.keep_prop:
 758             sync_svn_props(source_url, source_rev, "")
 759         for path in paths:
 760             if not path:
 761                 continue
 762             # Directories have a trailing slash in the "svn list" output
 763             path_is_dir = True if path[-1] == "/" else False
 764             path_offset = path.rstrip('/') if path_is_dir else path
 765             ui.status(" A %s", source_base+"/"+path_offset, level=ui.VERBOSE)
 766             if options.keep_prop:
 767                 sync_svn_props(source_url, source_rev, path_offset)
 768         # Commit the initial import
 769         num_entries_proc += 1
 770         target_revprops = gen_tracking_revprops(source_rev)   # Build source-tracking revprop's
 771         target_rev = commit_from_svn_log_entry(source_start_log, target_revprops=target_revprops)
 772         if target_rev:
 773             # Update rev_map, mapping table of source-repo rev # -> target-repo rev #
 774             set_rev_map(source_rev, target_rev)
 775             # Update our target working-copy, to ensure everything says it's at the new HEAD revision
 776             run_svn(["update"])
 777             commit_count += 1
 778             target_rev_last = target_rev
 779     else:
 780         # Re-build the rev_map based on any already-replayed history in target_url
 781         build_rev_map(target_url, target_rev_last, source_info)
 782         if not rev_map:
 783             parser.error("called with continue-mode, but no already-replayed source history found in target_url")
 784         source_start_rev = int(max(rev_map, key=rev_map.get))
 785         assert source_start_rev
 786         ui.status("Continuing from source revision %s.", source_start_rev, level=ui.VERBOSE)
 787         ui.status("")
 788
 789     if options.keep_revnum and source_start_rev < target_rev_last:
 790         parser.error("last target revision is equal-or-higher than starting source revision; "
 791                      "cannot use --keep-revnum mode")
 792
 793     svn_vers_t = svnclient.get_svn_client_version()
 794     svn_vers = float(".".join(map(str, svn_vers_t[0:2])))
 795
 796     # Load SVN log starting from source_start_rev + 1
 797     it_log_entries = svnclient.iter_svn_log_entries(source_url, source_start_rev+1, source_end_rev, get_revprops=True) if source_start_rev < source_end_rev else []
 798     source_rev = None
 799
 800     # TODO: Now that commit_from_svn_log_entry() might try to do a "svn propset svn:date",
 801     #       we might want some better KeyboardInterupt handilng here, to ensure that
 802     #       commit_from_svn_log_entry() always runs as an atomic unit.
 803     try:
 804         for log_entry in it_log_entries:
 805             if options.entries_proc_limit:
 806                 if num_entries_proc >= options.entries_proc_limit:
 807                     break
 808             # Replay this revision from source_url into target_url
 809             source_rev = log_entry['revision']
 810             if options.keep_revnum:
 811                 target_rev_last = keep_revnum(source_rev, target_rev_last, wc_target_tmp)
 812             disp_svn_log_summary(log_entry)
 813             # Process all the changed-paths in this log entry
 814             commit_paths = []
 815             process_svn_log_entry(log_entry, commit_paths)
 816             num_entries_proc += 1
 817             # Commit any changes made to _wc_target
 818             target_revprops = gen_tracking_revprops(source_rev)   # Build source-tracking revprop's
 819             target_rev = commit_from_svn_log_entry(log_entry, commit_paths, target_revprops=target_revprops)
 820             if target_rev:
 821                 # Update rev_map, mapping table of source-repo rev # -> target-repo rev #
 822                 source_rev = log_entry['revision']
 823                 set_rev_map(source_rev, target_rev)
 824                 target_rev_last = target_rev
 825                 # Update our target working-copy, to ensure everything says it's at the new HEAD revision
 826                 run_svn(["update"])
 827                 commit_count += 1
 828                 # Run "svn cleanup" every 100 commits if SVN 1.7+, to clean-up orphaned ".svn/pristines/*"
 829                 if svn_vers >= 1.7 and (commit_count % 100 == 0):
 830                     run_svn(["cleanup"])
 831         if not source_rev:
 832             # If there were no new source_url revisions to process, init source_rev
 833             # for the "finally" message below to be the last source revision replayed.
 834             source_rev = source_start_rev
 835
 836     except KeyboardInterrupt:
 837         print "\nStopped by user."
 838         print "\nCleaning-up..."
 839         run_svn(["cleanup"])
 840         full_svn_revert()
 841     except:
 842         print "\nCommand failed with following error:\n"
 843         traceback.print_exc()
 844         print "\nCleaning-up..."
 845         run_svn(["cleanup"])
 846         print run_svn(["status"])
 847         full_svn_revert()
 848     finally:
 849         print "\nFinished at source revision %s%s." % (source_rev, " (dry-run)" if options.dry_run else "")
 850
 851 def main():
 852     # Defined as entry point. Must be callable without arguments.
 853     usage = "svn2svn, version %s\n" % str(full_version) + \
 854             "<http://nynim.org/projects/svn2svn> <https://github.com/tonyduckles/svn2svn>\n\n" + \
 855             "Usage: %prog [OPTIONS] source_url target_url\n"
 856     description = """\
 857 Replicate (replay) history from one SVN repository to another. Maintain
 858 logical ancestry wherever possible, so that 'svn log' on the replayed repo
 859 will correctly follow file/folder renames.
 860
 861 Examples:
 862   Create a copy of only /trunk from source repo, starting at r5000
 863   $ svnadmin create /svn/target
 864   $ svn mkdir -m 'Add trunk' file:///svn/target/trunk
 865   $ svn2svn -av -r 5000 http://server/source/trunk file:///svn/target/trunk
 866     1. The target_url will be checked-out to ./_wc_target
 867     2. The first commit to http://server/source/trunk at/after r5000 will be
 868        exported & added into _wc_target
 869     3. All revisions affecting http://server/source/trunk (starting at r5000)
 870        will be replayed to _wc_target. Any add/copy/move/replaces that are
 871        copy-from'd some path outside of /trunk (e.g. files renamed on a
 872        /branch and branch was merged into /trunk) will correctly maintain
 873        logical ancestry where possible.
 874
 875   Use continue-mode (-c) to pick-up where the last run left-off
 876   $ svn2svn -avc http://server/source/trunk file:///svn/target/trunk
 877     1. The target_url will be checked-out to ./_wc_target, if not already
 878        checked-out
 879     2. All new revisions affecting http://server/source/trunk starting from
 880        the last replayed revision to file:///svn/target/trunk (based on the
 881        svn2svn:* revprops) will be replayed to _wc_target, maintaining all
 882        logical ancestry where possible."""
 883     parser = optparse.OptionParser(usage, description=description,
 884                 formatter=HelpFormatter(), version="%prog "+str(full_version))
 885     parser.add_option("-v", "--verbose", dest="verbosity", action="count", default=1,
 886                       help="enable additional output (use -vv or -vvv for more)")
 887     parser.add_option("-a", "--archive", action="store_true", dest="archive", default=False,
 888                       help="archive/mirror mode; same as -UDP (see REQUIRE's below)\n"
 889                            "maintain same commit author, same commit time, and file/dir properties")
 890     parser.add_option("-U", "--keep-author", action="store_true", dest="keep_author", default=False,
 891                       help="maintain same commit authors (svn:author) as source\n"
 892                            "(REQUIRES target_url be non-auth'd, e.g. file://-based, since this uses --username to set author)")
 893     parser.add_option("-D", "--keep-date", action="store_true", dest="keep_date", default=False,
 894                       help="maintain same commit time (svn:date) as source\n"
 895                            "(REQUIRES 'pre-revprop-change' hook script to allow 'svn:date' changes)")
 896     parser.add_option("-P", "--keep-prop", action="store_true", dest="keep_prop", default=False,
 897                       help="maintain same file/dir SVN properties as source")
 898     parser.add_option("-R", "--keep-revnum", action="store_true", dest="keep_revnum", default=False,
 899                       help="maintain same rev #'s as source. creates placeholder target "
 900                             "revisions (by modifying a 'svn2svn:keep-revnum' property at the root of the target repo)")
 901     parser.add_option("-c", "--continue", action="store_true", dest="cont_from_break",
 902                       help="continue from last source commit to target (based on svn2svn:* revprops)")
 903     parser.add_option("-r", "--revision", type="string", dest="revision", metavar="ARG",
 904                       help="revision range to replay from source_url\n"
 905                            "A revision argument can be one of:\n"
 906                            "   START        start rev # (end will be 'HEAD')\n"
 907                            "   START:END    start and ending rev #'s\n"
 908                            "Any revision # formats which SVN understands are "
 909                            "supported, e.g. 'HEAD', '{2010-01-31}', etc.")
 910     parser.add_option("-u", "--log-author", action="store_true", dest="log_author", default=False,
 911                       help="append source commit author to replayed commit mesages")
 912     parser.add_option("-d", "--log-date", action="store_true", dest="log_date", default=False,
 913                       help="append source commit time to replayed commit messages")
 914     parser.add_option("-l", "--limit", type="int", dest="entries_proc_limit", metavar="NUM",
 915                       help="maximum number of source revisions to process")
 916     parser.add_option("-n", "--dry-run", action="store_true", dest="dry_run", default=False,
 917                       help="process next source revision but don't commit changes to "
 918                            "target working-copy (forces --limit=1)")
 919     parser.add_option("--debug", dest="verbosity", const=ui.DEBUG, action="store_const",
 920                       help="enable debugging output (same as -vvv)")
 921     global options
 922     options, args = parser.parse_args()
 923     if len(args) != 2:
 924         parser.error("incorrect number of arguments")
 925     if options.verbosity < 10:
 926         # Expand multiple "-v" arguments to a real ui._level value
 927         options.verbosity *= 10
 928     if options.dry_run:
 929         # When in dry-run mode, only try to process the next log_entry
 930         options.entries_proc_limit = 1
 931     options.rev_start = None
 932     options.rev_end   = None
 933     if options.revision:
 934         # Reg-ex for matching a revision arg (http://svnbook.red-bean.com/en/1.5/svn.tour.revs.specifiers.html#svn.tour.revs.dates)
 935         rev_patt = '[0-9A-Z]+|\{[0-9A-Za-z/\\ :-]+\}'
 936         rev = None
 937         match = re.match('^('+rev_patt+'):('+rev_patt+')$', options.revision)  # First try start:end match
 938         if match is None: match = re.match('^('+rev_patt+')$', options.revision)   # Next, try start match
 939         if match is None:
 940             parser.error("unexpected --revision argument format; see 'svn help log' for valid revision formats")
 941         rev = match.groups()
 942         options.rev_start = rev[0] if len(rev)>0 else None
 943         options.rev_end   = rev[1] if len(rev)>1 else None
 944     if options.archive:
 945         options.keep_author = True
 946         options.keep_date   = True
 947         options.keep_prop   = True
 948     ui.update_config(options)
 949     return real_main(args, parser)
 950
 951
 952 if __name__ == "__main__":
 953     sys.exit(main() or 0)