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diff --git a/cvs2svn_lib/config.py b/cvs2svn_lib/config.py
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+# (Be in -*- python -*- mode.)
+#
+# ====================================================================
+# Copyright (c) 2000-2008 CollabNet.  All rights reserved.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution.  The terms
+# are also available at http://subversion.tigris.org/license-1.html.
+# If newer versions of this license are posted there, you may use a
+# newer version instead, at your option.
+#
+# This software consists of voluntary contributions made by many
+# individuals.  For exact contribution history, see the revision
+# history and logs, available at http://cvs2svn.tigris.org/.
+# ====================================================================
+
+"""This module contains various configuration constants used by cvs2svn."""
+
+
+SVN_KEYWORDS_VALUE = 'Author Date Id Revision'
+
+# The default names for the trunk/branches/tags directory for each
+# project:
+DEFAULT_TRUNK_BASE = 'trunk'
+DEFAULT_BRANCHES_BASE = 'branches'
+DEFAULT_TAGS_BASE = 'tags'
+
+SVNADMIN_EXECUTABLE = 'svnadmin'
+CO_EXECUTABLE = 'co'
+CVS_EXECUTABLE = 'cvs'
+SORT_EXECUTABLE = 'sort'
+
+# A pickled list of the projects defined for this conversion.
+PROJECTS = 'projects.pck'
+
+# A file holding the Serializer to be used for
+# CVS_REVS_SUMMARY_*_DATAFILE and CVS_SYMBOLS_SYMMARY_*_DATAFILE:
+SUMMARY_SERIALIZER = 'summary-serializer.pck'
+
+# The first file contains enough information about each CVSRevision to
+# deduce preliminary Changesets.  The second file is a sorted version
+# of the first.
+CVS_REVS_SUMMARY_DATAFILE = 'revs-summary.txt'
+CVS_REVS_SUMMARY_SORTED_DATAFILE = 'revs-summary-s.txt'
+
+# The first file contains enough information about each CVSSymbol to
+# deduce preliminary Changesets.  The second file is a sorted version
+# of the first.
+CVS_SYMBOLS_SUMMARY_DATAFILE = 'symbols-summary.txt'
+CVS_SYMBOLS_SUMMARY_SORTED_DATAFILE = 'symbols-summary-s.txt'
+
+# A mapping from CVSItem id to Changeset id.
+CVS_ITEM_TO_CHANGESET = 'cvs-item-to-changeset.dat'
+
+# A mapping from CVSItem id to Changeset id, after the
+# RevisionChangeset loops have been broken.
+CVS_ITEM_TO_CHANGESET_REVBROKEN = 'cvs-item-to-changeset-revbroken.dat'
+
+# A mapping from CVSItem id to Changeset id, after the SymbolChangeset
+# loops have been broken.
+CVS_ITEM_TO_CHANGESET_SYMBROKEN = 'cvs-item-to-changeset-symbroken.dat'
+
+# A mapping from CVSItem id to Changeset id, after all Changeset
+# loops have been broken.
+CVS_ITEM_TO_CHANGESET_ALLBROKEN = 'cvs-item-to-changeset-allbroken.dat'
+
+# A mapping from id to Changeset.
+CHANGESETS_INDEX = 'changesets-index.dat'
+CHANGESETS_STORE = 'changesets.pck'
+
+# A mapping from id to Changeset, after the RevisionChangeset loops
+# have been broken.
+CHANGESETS_REVBROKEN_INDEX = 'changesets-revbroken-index.dat'
+CHANGESETS_REVBROKEN_STORE = 'changesets-revbroken.pck'
+
+# A mapping from id to Changeset, after the RevisionChangesets have
+# been sorted and converted into OrderedChangesets.
+CHANGESETS_REVSORTED_INDEX = 'changesets-revsorted-index.dat'
+CHANGESETS_REVSORTED_STORE = 'changesets-revsorted.pck'
+
+# A mapping from id to Changeset, after the SymbolChangeset loops have
+# been broken.
+CHANGESETS_SYMBROKEN_INDEX = 'changesets-symbroken-index.dat'
+CHANGESETS_SYMBROKEN_STORE = 'changesets-symbroken.pck'
+
+# A mapping from id to Changeset, after all Changeset loops have been
+# broken.
+CHANGESETS_ALLBROKEN_INDEX = 'changesets-allbroken-index.dat'
+CHANGESETS_ALLBROKEN_STORE = 'changesets-allbroken.pck'
+
+# The RevisionChangesets in commit order.  Each line contains the
+# changeset id and timestamp of one changeset, in hexadecimal, in the
+# order that the changesets should be committed to svn.
+CHANGESETS_SORTED_DATAFILE = 'changesets-s.txt'
+
+# A file containing a marshalled copy of all the statistics that have
+# been gathered so far is written at the end of each pass as a
+# marshalled dictionary.  This is the pattern used to generate the
+# filenames.
+STATISTICS_FILE = 'statistics-%02d.pck'
+
+# This text file contains records (1 per line) that describe openings
+# and closings for copies to tags and branches.  The format is as
+# follows:
+#
+#     SYMBOL_ID SVN_REVNUM TYPE CVS_SYMBOL_ID
+#
+# where type is either OPENING or CLOSING.  CVS_SYMBOL_ID is the id of
+# the CVSSymbol whose opening or closing is being described (in hex).
+SYMBOL_OPENINGS_CLOSINGS = 'symbolic-names.txt'
+# A sorted version of the above file.  SYMBOL_ID and SVN_REVNUM are
+# the primary and secondary sorting criteria.  It is important that
+# SYMBOL_IDs be located together to make it quick to read them at
+# once.  The order of SVN_REVNUM is only important because it is
+# assumed by some internal consistency checks.
+SYMBOL_OPENINGS_CLOSINGS_SORTED = 'symbolic-names-s.txt'
+
+# Skeleton version of the repository filesystem.  See class
+# RepositoryMirror for how these work.
+MIRROR_NODES_INDEX_TABLE = 'mirror-nodes-index.dat'
+MIRROR_NODES_STORE = 'mirror-nodes.pck'
+
+# Offsets pointing to the beginning of each symbol's records in
+# SYMBOL_OPENINGS_CLOSINGS_SORTED.  This file contains a pickled map
+# from symbol_id to file offset.
+SYMBOL_OFFSETS_DB = 'symbol-offsets.pck'
+
+# Pickled map of CVSFile.id to instance.
+CVS_FILES_DB = 'cvs-files.pck'
+
+# A series of records.  The first is a pickled serializer.  Each
+# subsequent record is a serialized list of all CVSItems applying to a
+# CVSFile.
+CVS_ITEMS_STORE = 'cvs-items.pck'
+
+# The same as above, but with the CVSItems ordered in groups based on
+# their initial changesets.  CVSItems will usually be accessed one
+# changeset at a time, so this ordering helps disk locality (even
+# though some of the changesets will later be broken up).
+CVS_ITEMS_SORTED_INDEX_TABLE = 'cvs-items-sorted-index.dat'
+CVS_ITEMS_SORTED_STORE = 'cvs-items-sorted.pck'
+
+# A record of all symbolic names that will be processed in the
+# conversion.  This file contains a pickled list of TypedSymbol
+# objects.
+SYMBOL_DB = 'symbols.pck'
+
+# A pickled list of the statistics for all symbols.  Each entry in the
+# list is an instance of cvs2svn_lib.symbol_statistics._Stats.
+SYMBOL_STATISTICS = 'symbol-statistics.pck'
+
+# These two databases provide a bidirectional mapping between
+# CVSRevision.ids (in hex) and Subversion revision numbers.
+#
+# The first maps CVSRevision.id to the SVN revision number of which it
+# is a part (more than one CVSRevision can map to the same SVN
+# revision number).
+#
+# The second maps Subversion revision numbers (as hex strings) to
+# pickled SVNCommit instances.
+CVS_REVS_TO_SVN_REVNUMS = 'cvs-revs-to-svn-revnums.dat'
+
+# This database maps Subversion revision numbers to pickled SVNCommit
+# instances.
+SVN_COMMITS_INDEX_TABLE = 'svn-commits-index.dat'
+SVN_COMMITS_STORE = 'svn-commits.pck'
+
+# How many bytes to read at a time from a pipe.  128 kiB should be
+# large enough to be efficient without wasting too much memory.
+PIPE_READ_SIZE = 128 * 1024
+
+# Records the author and log message for each changeset.  The database
+# contains a map metadata_id -> (author, logmessage).  Each
+# CVSRevision that is eligible to be combined into the same SVN commit
+# is assigned the same id.  Note that the (author, logmessage) pairs
+# are not necessarily all distinct; other data are taken into account
+# when constructing ids.
+METADATA_INDEX_TABLE = 'metadata-index.dat'
+METADATA_STORE = 'metadata.pck'
+
+# The same, after it has been cleaned up for the chosen output option:
+METADATA_CLEAN_INDEX_TABLE = 'metadata-clean-index.dat'
+METADATA_CLEAN_STORE = 'metadata-clean.pck'
+
+# The following four databases are used in conjunction with --use-internal-co.
+
+# Records the RCS deltas for all CVS revisions.  The deltas are to be
+# applied forward, i.e. those from trunk are reversed wrt RCS.
+RCS_DELTAS_INDEX_TABLE = 'rcs-deltas-index.dat'
+RCS_DELTAS_STORE = 'rcs-deltas.pck'
+
+# Records the revision tree of each RCS file.  The format is a list of
+# list of integers.  The outer list holds lines of development, the inner list
+# revisions within the LODs, revisions are CVSItem ids.  Branches "closer
+# to the trunk" appear later.  Revisions are sorted by reverse chronological
+# order.  The last revision of each branch is the revision it sprouts from.
+# Revisions that represent deletions at the end of a branch are omitted.
+RCS_TREES_INDEX_TABLE = 'rcs-trees-index.dat'
+RCS_TREES_STORE = 'rcs-trees.pck'
+
+# Records the revision tree of each RCS file after removing revisions
+# belonging to excluded branches.  Note that the branch ordering is arbitrary
+# in this file.
+RCS_TREES_FILTERED_INDEX_TABLE = 'rcs-trees-filtered-index.dat'
+RCS_TREES_FILTERED_STORE = 'rcs-trees-filtered.pck'
+
+# At any given time during OutputPass, holds the full text of each CVS
+# revision that was checked out already and still has descendants that will
+# be checked out.
+CVS_CHECKOUT_DB = 'cvs-checkout.db'
+
+# End of DBs related to --use-internal-co.
+
+# If this run will output directly to a Subversion repository, then
+# this is the name of the file that each revision will temporarily be
+# written to prior to writing it into the repository.
+DUMPFILE = 'svn.dump'
+
+# flush a commit if a 5 minute gap occurs.
+COMMIT_THRESHOLD = 5 * 60
+