convert: implement two hooks in builtin cvsps

hgext/convert/__init__.py

@@ -1,285 +1,294
 # convert.py Foreign SCM converter
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2, incorporated herein by reference.
 
 '''import revisions from foreign VCS repositories into Mercurial'''
 
 import convcmd
 import cvsps
 import subversion
 from mercurial import commands
 from mercurial.i18n import _
 
 # Commands definition was moved elsewhere to ease demandload job.
 
 def convert(ui, src, dest=None, revmapfile=None, **opts):
     """convert a foreign SCM repository to a Mercurial one.
 
     Accepted source formats [identifiers]:
 
     - Mercurial [hg]
     - CVS [cvs]
     - Darcs [darcs]
     - git [git]
     - Subversion [svn]
     - Monotone [mtn]
     - GNU Arch [gnuarch]
     - Bazaar [bzr]
     - Perforce [p4]
 
     Accepted destination formats [identifiers]:
 
     - Mercurial [hg]
     - Subversion [svn] (history on branches is not preserved)
 
     If no revision is given, all revisions will be converted.
     Otherwise, convert will only import up to the named revision
     (given in a format understood by the source).
 
     If no destination directory name is specified, it defaults to the
     basename of the source with '-hg' appended. If the destination
     repository doesn't exist, it will be created.
 
     By default, all sources except Mercurial will use --branchsort.
     Mercurial uses --sourcesort to preserve original revision numbers
     order. Sort modes have the following effects:
 
     --branchsort  convert from parent to child revision when possible,
                   which means branches are usually converted one after
                   the other. It generates more compact repositories.
 
     --datesort    sort revisions by date. Converted repositories have
                   good-looking changelogs but are often an order of
                   magnitude larger than the same ones generated by
                   --branchsort.
 
     --sourcesort  try to preserve source revisions order, only
                   supported by Mercurial sources.
 
     If <REVMAP> isn't given, it will be put in a default location
     (<dest>/.hg/shamap by default). The <REVMAP> is a simple text file
     that maps each source commit ID to the destination ID for that
     revision, like so::
 
       <source ID> <destination ID>
 
     If the file doesn't exist, it's automatically created. It's
     updated on each commit copied, so convert-repo can be interrupted
     and can be run repeatedly to copy new commits.
 
     The [username mapping] file is a simple text file that maps each
     source commit author to a destination commit author. It is handy
     for source SCMs that use unix logins to identify authors (eg:
     CVS). One line per author mapping and the line format is:
     srcauthor=whatever string you want
 
     The filemap is a file that allows filtering and remapping of files
     and directories. Comment lines start with '#'. Each line can
     contain one of the following directives::
 
       include path/to/file
 
       exclude path/to/file
 
       rename from/file to/file
 
     The 'include' directive causes a file, or all files under a
     directory, to be included in the destination repository, and the
     exclusion of all other files and directories not explicitly
     included. The 'exclude' directive causes files or directories to
     be omitted. The 'rename' directive renames a file or directory. To
     rename from a subdirectory into the root of the repository, use
     '.' as the path to rename to.
 
     The splicemap is a file that allows insertion of synthetic
     history, letting you specify the parents of a revision. This is
     useful if you want to e.g. give a Subversion merge two parents, or
     graft two disconnected series of history together. Each entry
     contains a key, followed by a space, followed by one or two
     comma-separated values. The key is the revision ID in the source
     revision control system whose parents should be modified (same
     format as a key in .hg/shamap). The values are the revision IDs
     (in either the source or destination revision control system) that
     should be used as the new parents for that node. For example, if
     you have merged "release-1.0" into "trunk", then you should
     specify the revision on "trunk" as the first parent and the one on
     the "release-1.0" branch as the second.
 
     The branchmap is a file that allows you to rename a branch when it is
     being brought in from whatever external repository. When used in
     conjunction with a splicemap, it allows for a powerful combination
     to help fix even the most badly mismanaged repositories and turn them
     into nicely structured Mercurial repositories. The branchmap contains
     lines of the form "original_branch_name new_branch_name".
     "original_branch_name" is the name of the branch in the source
     repository, and "new_branch_name" is the name of the branch is the
     destination repository. This can be used to (for instance) move code
     in one repository from "default" to a named branch.
 
     Mercurial Source
     ----------------
 
     --config convert.hg.ignoreerrors=False    (boolean)
         ignore integrity errors when reading. Use it to fix Mercurial
         repositories with missing revlogs, by converting from and to
         Mercurial.
     --config convert.hg.saverev=False         (boolean)
         store original revision ID in changeset (forces target IDs to
         change)
     --config convert.hg.startrev=0            (hg revision identifier)
         convert start revision and its descendants
 
     CVS Source
     ----------
 
     CVS source will use a sandbox (i.e. a checked-out copy) from CVS
     to indicate the starting point of what will be converted. Direct
     access to the repository files is not needed, unless of course the
     repository is :local:. The conversion uses the top level directory
     in the sandbox to find the CVS repository, and then uses CVS rlog
     commands to find files to convert. This means that unless a
     filemap is given, all files under the starting directory will be
     converted, and that any directory reorganization in the CVS
     sandbox is ignored.
 
     The options shown are the defaults.
 
     --config convert.cvsps.cache=True         (boolean)
         Set to False to disable remote log caching, for testing and
         debugging purposes.
     --config convert.cvsps.fuzz=60            (integer)
         Specify the maximum time (in seconds) that is allowed between
         commits with identical user and log message in a single
         changeset. When very large files were checked in as part of a
         changeset then the default may not be long enough.
     --config convert.cvsps.mergeto='{{mergetobranch ([-\\w]+)}}'
         Specify a regular expression to which commit log messages are
         matched. If a match occurs, then the conversion process will
         insert a dummy revision merging the branch on which this log
         message occurs to the branch indicated in the regex.
     --config convert.cvsps.mergefrom='{{mergefrombranch ([-\\w]+)}}'
         Specify a regular expression to which commit log messages are
         matched. If a match occurs, then the conversion process will
         add the most recent revision on the branch indicated in the
         regex as the second parent of the changeset.
+    --config hook.cvslog
+        Specify a Python function to be called at the end of gathering
+        the CVS log. The function is passed a list with the log entries,
+        and can modify the entries in-place, or add or delete them.
+    --config hook.cvschangesets
+        Specify a Python function to be called after the changesets
+        are calculated from the the CVS log. The function is passed
+        a list with the changeset entries, and can modify the changesets
+        in-place, or add or delete them.
 
     An additional "debugcvsps" Mercurial command allows the builtin
     changeset merging code to be run without doing a conversion. Its
     parameters and output are similar to that of cvsps 2.1. Please see
     the command help for more details.
 
     Subversion Source
     -----------------
 
     Subversion source detects classical trunk/branches/tags layouts.
     By default, the supplied "svn://repo/path/" source URL is
     converted as a single branch. If "svn://repo/path/trunk" exists it
     replaces the default branch. If "svn://repo/path/branches" exists,
     its subdirectories are listed as possible branches. If
     "svn://repo/path/tags" exists, it is looked for tags referencing
     converted branches. Default "trunk", "branches" and "tags" values
     can be overridden with following options. Set them to paths
     relative to the source URL, or leave them blank to disable auto
     detection.
 
     --config convert.svn.branches=branches    (directory name)
         specify the directory containing branches
     --config convert.svn.tags=tags            (directory name)
         specify the directory containing tags
     --config convert.svn.trunk=trunk          (directory name)
         specify the name of the trunk branch
 
     Source history can be retrieved starting at a specific revision,
     instead of being integrally converted. Only single branch
     conversions are supported.
 
     --config convert.svn.startrev=0           (svn revision number)
         specify start Subversion revision.
 
     Perforce Source
     ---------------
 
     The Perforce (P4) importer can be given a p4 depot path or a
     client specification as source. It will convert all files in the
     source to a flat Mercurial repository, ignoring labels, branches
     and integrations. Note that when a depot path is given you then
     usually should specify a target directory, because otherwise the
     target may be named ...-hg.
 
     It is possible to limit the amount of source history to be
     converted by specifying an initial Perforce revision.
 
     --config convert.p4.startrev=0            (perforce changelist number)
         specify initial Perforce revision.
 
     Mercurial Destination
     ---------------------
 
     --config convert.hg.clonebranches=False   (boolean)
         dispatch source branches in separate clones.
     --config convert.hg.tagsbranch=default    (branch name)
         tag revisions branch name
     --config convert.hg.usebranchnames=True   (boolean)
         preserve branch names
 
     """
     return convcmd.convert(ui, src, dest, revmapfile, **opts)
 
 def debugsvnlog(ui, **opts):
     return subversion.debugsvnlog(ui, **opts)
 
 def debugcvsps(ui, *args, **opts):
     '''create changeset information from CVS
 
     This command is intended as a debugging tool for the CVS to
     Mercurial converter, and can be used as a direct replacement for
     cvsps.
 
     Hg debugcvsps reads the CVS rlog for current directory (or any
     named directory) in the CVS repository, and converts the log to a
     series of changesets based on matching commit log entries and
     dates.'''
     return cvsps.debugcvsps(ui, *args, **opts)
 
 commands.norepo += " convert debugsvnlog debugcvsps"
 
 cmdtable = {
     "convert":
         (convert,
          [('A', 'authors', '', _('username mapping filename')),
           ('d', 'dest-type', '', _('destination repository type')),
           ('', 'filemap', '', _('remap file names using contents of file')),
           ('r', 'rev', '', _('import up to target revision REV')),
           ('s', 'source-type', '', _('source repository type')),
           ('', 'splicemap', '', _('splice synthesized history into place')),
           ('', 'branchmap', '', _('change branch names while converting')),
           ('', 'branchsort', None, _('try to sort changesets by branches')),
           ('', 'datesort', None, _('try to sort changesets by date')),
           ('', 'sourcesort', None, _('preserve source changesets order'))],
          _('hg convert [OPTION]... SOURCE [DEST [REVMAP]]')),
     "debugsvnlog":
         (debugsvnlog,
          [],
          'hg debugsvnlog'),
     "debugcvsps":
         (debugcvsps,
          [
           # Main options shared with cvsps-2.1
           ('b', 'branches', [], _('only return changes on specified branches')),
           ('p', 'prefix', '', _('prefix to remove from file names')),
           ('r', 'revisions', [], _('only return changes after or between specified tags')),
           ('u', 'update-cache', None, _("update cvs log cache")),
           ('x', 'new-cache', None, _("create new cvs log cache")),
           ('z', 'fuzz', 60, _('set commit time fuzz in seconds')),
           ('', 'root', '', _('specify cvsroot')),
           # Options specific to builtin cvsps
           ('', 'parents', '', _('show parent changesets')),
           ('', 'ancestors', '', _('show current changeset in ancestor branches')),
           # Options that are ignored for compatibility with cvsps-2.1
           ('A', 'cvs-direct', None, _('ignored for compatibility')),
          ],
          _('hg debugcvsps [OPTION]... [PATH]...')),
 }

hgext/convert/cvsps.py

@@ -1,831 +1,836
 #
 # Mercurial built-in replacement for cvsps.
 #
 # Copyright 2008, Frank Kingswood <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2, incorporated herein by reference.
 
 import os
 import re
 import cPickle as pickle
 from mercurial import util
 from mercurial.i18n import _
+from mercurial import hook
 
 class logentry(object):
     '''Class logentry has the following attributes:
         .author    - author name as CVS knows it
         .branch    - name of branch this revision is on
         .branches  - revision tuple of branches starting at this revision
         .comment   - commit message
         .date      - the commit date as a (time, tz) tuple
         .dead      - true if file revision is dead
         .file      - Name of file
         .lines     - a tuple (+lines, -lines) or None
         .parent    - Previous revision of this entry
         .rcs       - name of file as returned from CVS
         .revision  - revision number as tuple
         .tags      - list of tags on the file
         .synthetic - is this a synthetic "file ... added on ..." revision?
         .mergepoint- the branch that has been merged from
                      (if present in rlog output)
         .branchpoints- the branches that start at the current entry
     '''
     def __init__(self, **entries):
         self.__dict__.update(entries)
 
     def __repr__(self):
         return "<%s at 0x%x: %s %s>" % (self.__class__.__name__,
                                         id(self),
                                         self.file,
                                         ".".join(map(str, self.revision)))
 
 class logerror(Exception):
     pass
 
 def getrepopath(cvspath):
     """Return the repository path from a CVS path.
 
     >>> getrepopath('/foo/bar')
     '/foo/bar'
     >>> getrepopath('c:/foo/bar')
     'c:/foo/bar'
     >>> getrepopath(':pserver:10/foo/bar')
     '/foo/bar'
     >>> getrepopath(':pserver:10c:/foo/bar')
     '/foo/bar'
     >>> getrepopath(':pserver:/foo/bar')
     '/foo/bar'
     >>> getrepopath(':pserver:c:/foo/bar')
     'c:/foo/bar'
     >>> getrepopath(':pserver:[e-mail]:/foo/bar')
     '/foo/bar'
     >>> getrepopath(':pserver:[e-mail]:c:/foo/bar')
     'c:/foo/bar'
     """
     # According to CVS manual, CVS paths are expressed like:
     # [:method:][[user][:password]@]hostname[:[port]]/path/to/repository
     #
     # Unfortunately, Windows absolute paths start with a drive letter
     # like 'c:' making it harder to parse. Here we assume that drive
     # letters are only one character long and any CVS component before
     # the repository path is at least 2 characters long, and use this
     # to disambiguate.
     parts = cvspath.split(':')
     if len(parts) == 1:
         return parts[0]
     # Here there is an ambiguous case if we have a port number
     # immediately followed by a Windows driver letter. We assume this
     # never happens and decide it must be CVS path component,
     # therefore ignoring it.
     if len(parts[-2]) > 1:
         return parts[-1].lstrip('0123456789')
     return parts[-2] + ':' + parts[-1]
 
 def createlog(ui, directory=None, root="", rlog=True, cache=None):
     '''Collect the CVS rlog'''
 
     # Because we store many duplicate commit log messages, reusing strings
     # saves a lot of memory and pickle storage space.
     _scache = {}
     def scache(s):
         "return a shared version of a string"
         return _scache.setdefault(s, s)
 
     ui.status(_('collecting CVS rlog\n'))
 
     log = []      # list of logentry objects containing the CVS state
 
     # patterns to match in CVS (r)log output, by state of use
     re_00 = re.compile('RCS file: (.+)$')
     re_01 = re.compile('cvs \\[r?log aborted\\]: (.+)$')
     re_02 = re.compile('cvs (r?log|server): (.+)\n$')
     re_03 = re.compile("(Cannot access.+CVSROOT)|"
                        "(can't create temporary directory.+)$")
     re_10 = re.compile('Working file: (.+)$')
     re_20 = re.compile('symbolic names:')
     re_30 = re.compile('\t(.+): ([\\d.]+)$')
     re_31 = re.compile('----------------------------$')
     re_32 = re.compile('======================================='
                        '======================================$')
     re_50 = re.compile('revision ([\\d.]+)(\s+locked by:\s+.+;)?$')
     re_60 = re.compile(r'date:\s+(.+);\s+author:\s+(.+);\s+state:\s+(.+?);'
                        r'(\s+lines:\s+(\+\d+)?\s+(-\d+)?;)?'
                        r'(.*mergepoint:\s+([^;]+);)?')
     re_70 = re.compile('branches: (.+);$')
 
     file_added_re = re.compile(r'file [^/]+ was (initially )?added on branch')
 
     prefix = ''   # leading path to strip of what we get from CVS
 
     if directory is None:
         # Current working directory
 
         # Get the real directory in the repository
         try:
             prefix = open(os.path.join('CVS','Repository')).read().strip()
             if prefix == ".":
                 prefix = ""
             directory = prefix
         except IOError:
             raise logerror('Not a CVS sandbox')
 
         if prefix and not prefix.endswith(os.sep):
             prefix += os.sep
 
         # Use the Root file in the sandbox, if it exists
         try:
             root = open(os.path.join('CVS','Root')).read().strip()
         except IOError:
             pass
 
     if not root:
         root = os.environ.get('CVSROOT', '')
 
     # read log cache if one exists
     oldlog = []
     date = None
 
     if cache:
         cachedir = os.path.expanduser('~/.hg.cvsps')
         if not os.path.exists(cachedir):
             os.mkdir(cachedir)
 
         # The cvsps cache pickle needs a uniquified name, based on the
         # repository location. The address may have all sort of nasties
         # in it, slashes, colons and such. So here we take just the
         # alphanumerics, concatenated in a way that does not mix up the
         # various components, so that
         #    :pserver:user@server:/path
         # and
         #    /pserver/user/server/path
         # are mapped to different cache file names.
         cachefile = root.split(":") + [directory, "cache"]
         cachefile = ['-'.join(re.findall(r'\w+', s)) for s in cachefile if s]
         cachefile = os.path.join(cachedir,
                                  '.'.join([s for s in cachefile if s]))
 
     if cache == 'update':
         try:
             ui.note(_('reading cvs log cache %s\n') % cachefile)
             oldlog = pickle.load(open(cachefile))
             ui.note(_('cache has %d log entries\n') % len(oldlog))
         except Exception, e:
             ui.note(_('error reading cache: %r\n') % e)
 
         if oldlog:
             date = oldlog[-1].date    # last commit date as a (time,tz) tuple
             date = util.datestr(date, '%Y/%m/%d %H:%M:%S %1%2')
 
     # build the CVS commandline
     cmd = ['cvs', '-q']
     if root:
         cmd.append('-d%s' % root)
         p = util.normpath(getrepopath(root))
         if not p.endswith('/'):
             p += '/'
         prefix = p + util.normpath(prefix)
     cmd.append(['log', 'rlog'][rlog])
     if date:
         # no space between option and date string
         cmd.append('-d>%s' % date)
     cmd.append(directory)
 
     # state machine begins here
     tags = {}     # dictionary of revisions on current file with their tags
     branchmap = {} # mapping between branch names and revision numbers
     state = 0
     store = False # set when a new record can be appended
 
     cmd = [util.shellquote(arg) for arg in cmd]
     ui.note(_("running %s\n") % (' '.join(cmd)))
     ui.debug("prefix=%r directory=%r root=%r\n" % (prefix, directory, root))
 
     pfp = util.popen(' '.join(cmd))
     peek = pfp.readline()
     while True:
         line = peek
         if line == '':
             break
         peek = pfp.readline()
         if line.endswith('\n'):
             line = line[:-1]
         #ui.debug('state=%d line=%r\n' % (state, line))
 
         if state == 0:
             # initial state, consume input until we see 'RCS file'
             match = re_00.match(line)
             if match:
                 rcs = match.group(1)
                 tags = {}
                 if rlog:
                     filename = util.normpath(rcs[:-2])
                     if filename.startswith(prefix):
                         filename = filename[len(prefix):]
                     if filename.startswith('/'):
                         filename = filename[1:]
                     if filename.startswith('Attic/'):
                         filename = filename[6:]
                     else:
                         filename = filename.replace('/Attic/', '/')
                     state = 2
                     continue
                 state = 1
                 continue
             match = re_01.match(line)
             if match:
                 raise Exception(match.group(1))
             match = re_02.match(line)
             if match:
                 raise Exception(match.group(2))
             if re_03.match(line):
                 raise Exception(line)
 
         elif state == 1:
             # expect 'Working file' (only when using log instead of rlog)
             match = re_10.match(line)
             assert match, _('RCS file must be followed by working file')
             filename = util.normpath(match.group(1))
             state = 2
 
         elif state == 2:
             # expect 'symbolic names'
             if re_20.match(line):
                 branchmap = {}
                 state = 3
 
         elif state == 3:
             # read the symbolic names and store as tags
             match = re_30.match(line)
             if match:
                 rev = [int(x) for x in match.group(2).split('.')]
 
                 # Convert magic branch number to an odd-numbered one
                 revn = len(rev)
                 if revn > 3 and (revn % 2) == 0 and rev[-2] == 0:
                     rev = rev[:-2] + rev[-1:]
                 rev = tuple(rev)
 
                 if rev not in tags:
                     tags[rev] = []
                 tags[rev].append(match.group(1))
                 branchmap[match.group(1)] = match.group(2)
 
             elif re_31.match(line):
                 state = 5
             elif re_32.match(line):
                 state = 0
 
         elif state == 4:
             # expecting '------' separator before first revision
             if re_31.match(line):
                 state = 5
             else:
                 assert not re_32.match(line), _('must have at least '
                                                 'some revisions')
 
         elif state == 5:
             # expecting revision number and possibly (ignored) lock indication
             # we create the logentry here from values stored in states 0 to 4,
             # as this state is re-entered for subsequent revisions of a file.
             match = re_50.match(line)
             assert match, _('expected revision number')
             e = logentry(rcs=scache(rcs), file=scache(filename),
                     revision=tuple([int(x) for x in match.group(1).split('.')]),
                     branches=[], parent=None,
                     synthetic=False)
             state = 6
 
         elif state == 6:
             # expecting date, author, state, lines changed
             match = re_60.match(line)
             assert match, _('revision must be followed by date line')
             d = match.group(1)
             if d[2] == '/':
                 # Y2K
                 d = '19' + d
 
             if len(d.split()) != 3:
                 # cvs log dates always in GMT
                 d = d + ' UTC'
             e.date = util.parsedate(d, ['%y/%m/%d %H:%M:%S',
                                         '%Y/%m/%d %H:%M:%S',
                                         '%Y-%m-%d %H:%M:%S'])
             e.author = scache(match.group(2))
             e.dead = match.group(3).lower() == 'dead'
 
             if match.group(5):
                 if match.group(6):
                     e.lines = (int(match.group(5)), int(match.group(6)))
                 else:
                     e.lines = (int(match.group(5)), 0)
             elif match.group(6):
                 e.lines = (0, int(match.group(6)))
             else:
                 e.lines = None
 
             if match.group(7): # cvsnt mergepoint
                 myrev = match.group(8).split('.')
                 if len(myrev) == 2: # head
                     e.mergepoint = 'HEAD'
                 else:
                     myrev = '.'.join(myrev[:-2] + ['0', myrev[-2]])
                     branches = [b for b in branchmap if branchmap[b] == myrev]
                     assert len(branches) == 1, 'unknown branch: %s' % e.mergepoint
                     e.mergepoint = branches[0]
             else:
                 e.mergepoint = None
             e.comment = []
             state = 7
 
         elif state == 7:
             # read the revision numbers of branches that start at this revision
             # or store the commit log message otherwise
             m = re_70.match(line)
             if m:
                 e.branches = [tuple([int(y) for y in x.strip().split('.')])
                                 for x in m.group(1).split(';')]
                 state = 8
             elif re_31.match(line) and re_50.match(peek):
                 state = 5
                 store = True
             elif re_32.match(line):
                 state = 0
                 store = True
             else:
                 e.comment.append(line)
 
         elif state == 8:
             # store commit log message
             if re_31.match(line):
                 state = 5
                 store = True
             elif re_32.match(line):
                 state = 0
                 store = True
             else:
                 e.comment.append(line)
 
         # When a file is added on a branch B1, CVS creates a synthetic
         # dead trunk revision 1.1 so that the branch has a root.
         # Likewise, if you merge such a file to a later branch B2 (one
         # that already existed when the file was added on B1), CVS
         # creates a synthetic dead revision 1.1.x.1 on B2.  Don't drop
         # these revisions now, but mark them synthetic so
         # createchangeset() can take care of them.
         if (store and
               e.dead and
               e.revision[-1] == 1 and      # 1.1 or 1.1.x.1
               len(e.comment) == 1 and
               file_added_re.match(e.comment[0])):
             ui.debug('found synthetic revision in %s: %r\n'
                      % (e.rcs, e.comment[0]))
             e.synthetic = True
 
         if store:
             # clean up the results and save in the log.
             store = False
             e.tags = sorted([scache(x) for x in tags.get(e.revision, [])])
             e.comment = scache('\n'.join(e.comment))
 
             revn = len(e.revision)
             if revn > 3 and (revn % 2) == 0:
                 e.branch = tags.get(e.revision[:-1], [None])[0]
             else:
                 e.branch = None
 
             # find the branches starting from this revision
             branchpoints = set()
             for branch, revision in branchmap.iteritems():
                 revparts = tuple([int(i) for i in revision.split('.')])
                 if revparts[-2] == 0 and revparts[-1] % 2 == 0:
                     # normal branch
                     if revparts[:-2] == e.revision:
                         branchpoints.add(branch)
                 elif revparts == (1,1,1): # vendor branch
                     if revparts in e.branches:
                         branchpoints.add(branch)
             e.branchpoints = branchpoints
 
             log.append(e)
 
             if len(log) % 100 == 0:
                 ui.status(util.ellipsis('%d %s' % (len(log), e.file), 80)+'\n')
 
     log.sort(key=lambda x: (x.rcs, x.revision))
 
     # find parent revisions of individual files
     versions = {}
     for e in log:
         branch = e.revision[:-1]
         p = versions.get((e.rcs, branch), None)
         if p is None:
             p = e.revision[:-2]
         e.parent = p
         versions[(e.rcs, branch)] = e.revision
 
     # update the log cache
     if cache:
         if log:
             # join up the old and new logs
             log.sort(key=lambda x: x.date)
 
             if oldlog and oldlog[-1].date >= log[0].date:
                 raise logerror('Log cache overlaps with new log entries,'
                                ' re-run without cache.')
 
             log = oldlog + log
 
             # write the new cachefile
             ui.note(_('writing cvs log cache %s\n') % cachefile)
             pickle.dump(log, open(cachefile, 'w'))
         else:
             log = oldlog
 
     ui.status(_('%d log entries\n') % len(log))
 
+    hook.hook(ui, None, "cvslog", True, log=log)
+
     return log
 
 
 class changeset(object):
     '''Class changeset has the following attributes:
         .id        - integer identifying this changeset (list index)
         .author    - author name as CVS knows it
         .branch    - name of branch this changeset is on, or None
         .comment   - commit message
         .date      - the commit date as a (time,tz) tuple
         .entries   - list of logentry objects in this changeset
         .parents   - list of one or two parent changesets
         .tags      - list of tags on this changeset
         .synthetic - from synthetic revision "file ... added on branch ..."
         .mergepoint- the branch that has been merged from
                      (if present in rlog output)
         .branchpoints- the branches that start at the current entry
     '''
     def __init__(self, **entries):
         self.__dict__.update(entries)
 
     def __repr__(self):
         return "<%s at 0x%x: %s>" % (self.__class__.__name__,
                                      id(self),
                                      getattr(self, 'id', "(no id)"))
 
 def createchangeset(ui, log, fuzz=60, mergefrom=None, mergeto=None):
     '''Convert log into changesets.'''
 
     ui.status(_('creating changesets\n'))
 
     # Merge changesets
 
     log.sort(key=lambda x: (x.comment, x.author, x.branch, x.date))
 
     changesets = []
     files = set()
     c = None
     for i, e in enumerate(log):
 
         # Check if log entry belongs to the current changeset or not.
 
         # Since CVS is file centric, two different file revisions with
         # different branchpoints should be treated as belonging to two
         # different changesets (and the ordering is important and not
         # honoured by cvsps at this point).
         #
         # Consider the following case:
         # foo 1.1 branchpoints: [MYBRANCH]
         # bar 1.1 branchpoints: [MYBRANCH, MYBRANCH2]
         #
         # Here foo is part only of MYBRANCH, but not MYBRANCH2, e.g. a
         # later version of foo may be in MYBRANCH2, so foo should be the
         # first changeset and bar the next and MYBRANCH and MYBRANCH2
         # should both start off of the bar changeset. No provisions are
         # made to ensure that this is, in fact, what happens.
         if not (c and
                   e.comment == c.comment and
                   e.author == c.author and
                   e.branch == c.branch and
                   (not hasattr(e, 'branchpoints') or
                     not hasattr (c, 'branchpoints') or
                     e.branchpoints == c.branchpoints) and
                   ((c.date[0] + c.date[1]) <=
                    (e.date[0] + e.date[1]) <=
                    (c.date[0] + c.date[1]) + fuzz) and
                   e.file not in files):
             c = changeset(comment=e.comment, author=e.author,
                           branch=e.branch, date=e.date, entries=[],
                           mergepoint=getattr(e, 'mergepoint', None),
                           branchpoints=getattr(e, 'branchpoints', set()))
             changesets.append(c)
             files = set()
             if len(changesets) % 100 == 0:
                 t = '%d %s' % (len(changesets), repr(e.comment)[1:-1])
                 ui.status(util.ellipsis(t, 80) + '\n')
 
         c.entries.append(e)
         files.add(e.file)
         c.date = e.date       # changeset date is date of latest commit in it
 
     # Mark synthetic changesets
 
     for c in changesets:
         # Synthetic revisions always get their own changeset, because
         # the log message includes the filename.  E.g. if you add file3
         # and file4 on a branch, you get four log entries and three
         # changesets:
         #   "File file3 was added on branch ..." (synthetic, 1 entry)
         #   "File file4 was added on branch ..." (synthetic, 1 entry)
         #   "Add file3 and file4 to fix ..."     (real, 2 entries)
         # Hence the check for 1 entry here.
         synth = getattr(c.entries[0], 'synthetic', None)
         c.synthetic = (len(c.entries) == 1 and synth)
 
     # Sort files in each changeset
 
     for c in changesets:
         def pathcompare(l, r):
             'Mimic cvsps sorting order'
             l = l.split('/')
             r = r.split('/')
             nl = len(l)
             nr = len(r)
             n = min(nl, nr)
             for i in range(n):
                 if i + 1 == nl and nl < nr:
                     return -1
                 elif i + 1 == nr and nl > nr:
                     return +1
                 elif l[i] < r[i]:
                     return -1
                 elif l[i] > r[i]:
                     return +1
             return 0
         def entitycompare(l, r):
             return pathcompare(l.file, r.file)
 
         c.entries.sort(entitycompare)
 
     # Sort changesets by date
 
     def cscmp(l, r):
         d = sum(l.date) - sum(r.date)
         if d:
             return d
 
         # detect vendor branches and initial commits on a branch
         le = {}
         for e in l.entries:
             le[e.rcs] = e.revision
         re = {}
         for e in r.entries:
             re[e.rcs] = e.revision
 
         d = 0
         for e in l.entries:
             if re.get(e.rcs, None) == e.parent:
                 assert not d
                 d = 1
                 break
 
         for e in r.entries:
             if le.get(e.rcs, None) == e.parent:
                 assert not d
                 d = -1
                 break
 
         return d
 
     changesets.sort(cscmp)
 
     # Collect tags
 
     globaltags = {}
     for c in changesets:
         for e in c.entries:
             for tag in e.tags:
                 # remember which is the latest changeset to have this tag
                 globaltags[tag] = c
 
     for c in changesets:
         tags = set()
         for e in c.entries:
             tags.update(e.tags)
         # remember tags only if this is the latest changeset to have it
         c.tags = sorted(tag for tag in tags if globaltags[tag] is c)
 
     # Find parent changesets, handle {{mergetobranch BRANCHNAME}}
     # by inserting dummy changesets with two parents, and handle
     # {{mergefrombranch BRANCHNAME}} by setting two parents.
 
     if mergeto is None:
         mergeto = r'{{mergetobranch ([-\w]+)}}'
     if mergeto:
         mergeto = re.compile(mergeto)
 
     if mergefrom is None:
         mergefrom = r'{{mergefrombranch ([-\w]+)}}'
     if mergefrom:
         mergefrom = re.compile(mergefrom)
 
     versions = {}    # changeset index where we saw any particular file version
     branches = {}    # changeset index where we saw a branch
     n = len(changesets)
     i = 0
     while i<n:
         c = changesets[i]
 
         for f in c.entries:
             versions[(f.rcs, f.revision)] = i
 
         p = None
         if c.branch in branches:
             p = branches[c.branch]
         else:
             # first changeset on a new branch
             # the parent is a changeset with the branch in its
             # branchpoints such that it is the latest possible
             # commit without any intervening, unrelated commits.
 
             for candidate in xrange(i):
                 if c.branch not in changesets[candidate].branchpoints:
                     if p is not None:
                         break
                     continue
                 p = candidate
 
         c.parents = []
         if p is not None:
             p = changesets[p]
 
             # Ensure no changeset has a synthetic changeset as a parent.
             while p.synthetic:
                 assert len(p.parents) <= 1, \
                        _('synthetic changeset cannot have multiple parents')
                 if p.parents:
                     p = p.parents[0]
                 else:
                     p = None
                     break
 
             if p is not None:
                 c.parents.append(p)
 
         if c.mergepoint:
             if c.mergepoint == 'HEAD':
                 c.mergepoint = None
             c.parents.append(changesets[branches[c.mergepoint]])
 
         if mergefrom:
             m = mergefrom.search(c.comment)
             if m:
                 m = m.group(1)
                 if m == 'HEAD':
                     m = None
                 try:
                     candidate = changesets[branches[m]]
                 except KeyError:
                     ui.warn(_("warning: CVS commit message references "
                               "non-existent branch %r:\n%s\n")
                             % (m, c.comment))
                 if m in branches and c.branch != m and not candidate.synthetic:
                     c.parents.append(candidate)
 
         if mergeto:
             m = mergeto.search(c.comment)
             if m:
                 try:
                     m = m.group(1)
                     if m == 'HEAD':
                         m = None
                 except:
                     m = None   # if no group found then merge to HEAD
                 if m in branches and c.branch != m:
                     # insert empty changeset for merge
                     cc = changeset(author=c.author, branch=m, date=c.date,
                             comment='convert-repo: CVS merge from branch %s' % c.branch,
                             entries=[], tags=[], parents=[changesets[branches[m]], c])
                     changesets.insert(i + 1, cc)
                     branches[m] = i + 1
 
                     # adjust our loop counters now we have inserted a new entry
                     n += 1
                     i += 2
                     continue
 
         branches[c.branch] = i
         i += 1
 
     # Drop synthetic changesets (safe now that we have ensured no other
     # changesets can have them as parents).
     i = 0
     while i < len(changesets):
         if changesets[i].synthetic:
             del changesets[i]
         else:
             i += 1
 
     # Number changesets
 
     for i, c in enumerate(changesets):
         c.id = i + 1
 
     ui.status(_('%d changeset entries\n') % len(changesets))
 
+    hook.hook(ui, None, "cvschangesets", True, changesets=changesets)
+
     return changesets
 
 
 def debugcvsps(ui, *args, **opts):
     '''Read CVS rlog for current directory or named path in
     repository, and convert the log to changesets based on matching
     commit log entries and dates.
     '''
     if opts["new_cache"]:
         cache = "write"
     elif opts["update_cache"]:
         cache = "update"
     else:
         cache = None
 
     revisions = opts["revisions"]
 
     try:
         if args:
             log = []
             for d in args:
                 log += createlog(ui, d, root=opts["root"], cache=cache)
         else:
             log = createlog(ui, root=opts["root"], cache=cache)
     except logerror, e:
         ui.write("%r\n"%e)
         return
 
     changesets = createchangeset(ui, log, opts["fuzz"])
     del log
 
     # Print changesets (optionally filtered)
 
     off = len(revisions)
     branches = {}    # latest version number in each branch
     ancestors = {}   # parent branch
     for cs in changesets:
 
         if opts["ancestors"]:
             if cs.branch not in branches and cs.parents and cs.parents[0].id:
                 ancestors[cs.branch] = (changesets[cs.parents[0].id-1].branch,
                                         cs.parents[0].id)
             branches[cs.branch] = cs.id
 
         # limit by branches
         if opts["branches"] and (cs.branch or 'HEAD') not in opts["branches"]:
             continue
 
         if not off:
             # Note: trailing spaces on several lines here are needed to have
             #       bug-for-bug compatibility with cvsps.
             ui.write('---------------------\n')
             ui.write('PatchSet %d \n' % cs.id)
             ui.write('Date: %s\n' % util.datestr(cs.date,
                                                  '%Y/%m/%d %H:%M:%S %1%2'))
             ui.write('Author: %s\n' % cs.author)
             ui.write('Branch: %s\n' % (cs.branch or 'HEAD'))
             ui.write('Tag%s: %s \n' % (['', 's'][len(cs.tags)>1],
                                   ','.join(cs.tags) or '(none)'))
             branchpoints = getattr(cs, 'branchpoints', None)
             if branchpoints:
                 ui.write('Branchpoints: %s \n' % ', '.join(branchpoints))
             if opts["parents"] and cs.parents:
                 if len(cs.parents)>1:
                     ui.write('Parents: %s\n' % (','.join([str(p.id) for p in cs.parents])))
                 else:
                     ui.write('Parent: %d\n' % cs.parents[0].id)
 
             if opts["ancestors"]:
                 b = cs.branch
                 r = []
                 while b:
                     b, c = ancestors[b]
                     r.append('%s:%d:%d' % (b or "HEAD", c, branches[b]))
                 if r:
                     ui.write('Ancestors: %s\n' % (','.join(r)))
 
             ui.write('Log:\n')
             ui.write('%s\n\n' % cs.comment)
             ui.write('Members: \n')
             for f in cs.entries:
                 fn = f.file
                 if fn.startswith(opts["prefix"]):
                     fn = fn[len(opts["prefix"]):]
                 ui.write('\t%s:%s->%s%s \n' % (fn, '.'.join([str(x) for x in f.parent]) or 'INITIAL',
                                           '.'.join([str(x) for x in f.revision]), ['', '(DEAD)'][f.dead]))
             ui.write('\n')
 
         # have we seen the start tag?
         if revisions and off:
             if revisions[0] == str(cs.id) or \
                 revisions[0] in cs.tags:
                 off = False
 
         # see if we reached the end tag
         if len(revisions)>1 and not off:
             if revisions[1] == str(cs.id) or \
                 revisions[1] in cs.tags:
                 break

tests/test-convert-cvs

@@ -1,120 +1,133
 #!/bin/sh
 
 "$TESTDIR/hghave" cvs || exit 80
 
 cvscall()
 {
     cvs -f "$@"
 }
 
 hgcat()
 {
     hg --cwd src-hg cat -r tip "$1"
 }
 
 echo "[extensions]" >> $HGRCPATH
 echo "convert = " >> $HGRCPATH
 echo "graphlog = " >> $HGRCPATH
 
+cat > cvshooks.py <<EOF
+def cvslog(ui,repo,hooktype,log):
+    print "%s hook: %d entries"%(hooktype,len(log))
+
+def cvschangesets(ui,repo,hooktype,changesets):
+    print "%s hook: %d changesets"%(hooktype,len(changesets))
+EOF
+hookpath=$PWD
+
+echo "[hooks]" >> $HGRCPATH
+echo "cvslog=python:$hookpath/cvshooks.py:cvslog" >> $HGRCPATH
+echo "cvschangesets=python:$hookpath/cvshooks.py:cvschangesets" >> $HGRCPATH
+
 echo % create cvs repository
 mkdir cvsrepo
 cd cvsrepo
-CVSROOT=`pwd`
+CVSROOT=$PWD
 export CVSROOT
 CVS_OPTIONS=-f
 export CVS_OPTIONS
 cd ..
 
 cvscall -q -d "$CVSROOT" init
 
 echo % create source directory
 mkdir src-temp
 cd src-temp
 echo a > a
 mkdir b
 cd b
 echo c > c
 cd ..
 
 echo % import source directory
 cvscall -q import -m import src INITIAL start
 cd ..
 
 echo % checkout source directory
 cvscall -q checkout src
 
 echo % commit a new revision changing b/c
 cd src
 sleep 1
 echo c >> b/c
 cvscall -q commit -mci0 . | grep '<--' |\
     sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'
 cd ..
 
 echo % convert fresh repo
 hg convert src src-hg | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'
 hgcat a
 hgcat b/c
 
 echo % convert fresh repo with --filemap
 echo include b/c > filemap
 hg convert --filemap filemap src src-filemap | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'
 hgcat b/c
 hg -R src-filemap log --template '{rev} {desc} files: {files}\n'
 
 echo % commit new file revisions
 cd src
 echo a >> a
 echo c >> b/c
 cvscall -q commit -mci1 . | grep '<--' |\
     sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'
 cd ..
 
 echo % convert again
 hg convert src src-hg | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'
 hgcat a
 hgcat b/c
 
 echo % convert again with --filemap
 hg convert --filemap filemap src src-filemap | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'
 hgcat b/c
 hg -R src-filemap log --template '{rev} {desc} files: {files}\n'
 
 echo % commit branch
 cd src
 cvs -q update -r1.1 b/c
 cvs -q tag -b branch
 cvs -q update -r branch > /dev/null
 echo d >> b/c
 cvs -q commit -mci2 . | grep '<--' |\
     sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'
 cd ..
 
 echo % convert again
 hg convert src src-hg | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'
 hgcat b/c
 
 echo % convert again with --filemap
 hg convert --filemap filemap src src-filemap | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'
 hgcat b/c
 hg -R src-filemap log --template '{rev} {desc} files: {files}\n'
 
 echo % commit a new revision with funny log message
 cd src
 sleep 1
 echo e >> a
 cvscall -q commit -m'funny
 ----------------------------
 log message' . | grep '<--' |\
     sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'
 cd ..
 
 echo % convert again
 hg convert src src-hg | sed -e 's/connecting to.*cvsrepo/connecting to cvsrepo/g'
 
 echo "graphlog = " >> $HGRCPATH
 hg -R src-hg glog --template '{rev} ({branches}) {desc} files: {files}\n'
 
 echo % testing debugcvsps
 cd src
 hg debugcvsps | sed -e 's/Author:.*/Author:/' -e 's/Date:.*/Date:/' 

tests/test-convert-cvs.out

@@ -1,254 +1,270
 % create cvs repository
 % create source directory
 % import source directory
 N src/a
 N src/b/c
 
 No conflicts created by this import
 
 % checkout source directory
 U src/a
 U src/b/c
 % commit a new revision changing b/c
 checking in src/b/c,v
 % convert fresh repo
 initializing destination src-hg repository
 connecting to cvsrepo
 scanning source...
 collecting CVS rlog
 5 log entries
+cvslog hook: 5 entries
 creating changesets
 3 changeset entries
+cvschangesets hook: 3 changesets
 sorting...
 converting...
 2 Initial revision
 1 import
 0 ci0
 updating tags
 a
 c
 c
 % convert fresh repo with --filemap
 initializing destination src-filemap repository
 connecting to cvsrepo
 scanning source...
 collecting CVS rlog
 5 log entries
+cvslog hook: 5 entries
 creating changesets
 3 changeset entries
+cvschangesets hook: 3 changesets
 sorting...
 converting...
 2 Initial revision
 1 import
 filtering out empty revision
 rolling back last transaction
 0 ci0
 updating tags
 c
 c
 2 update tags files: .hgtags
 1 ci0 files: b/c
 0 Initial revision files: b/c
 % commit new file revisions
 checking in src/a,v
 checking in src/b/c,v
 % convert again
 connecting to cvsrepo
 scanning source...
 collecting CVS rlog
 7 log entries
+cvslog hook: 7 entries
 creating changesets
 4 changeset entries
+cvschangesets hook: 4 changesets
 sorting...
 converting...
 0 ci1
 a
 a
 c
 c
 c
 % convert again with --filemap
 connecting to cvsrepo
 scanning source...
 collecting CVS rlog
 7 log entries
+cvslog hook: 7 entries
 creating changesets
 4 changeset entries
+cvschangesets hook: 4 changesets
 sorting...
 converting...
 0 ci1
 c
 c
 c
 3 ci1 files: b/c
 2 update tags files: .hgtags
 1 ci0 files: b/c
 0 Initial revision files: b/c
 % commit branch
 U b/c
 T a
 T b/c
 checking in src/b/c,v
 % convert again
 connecting to cvsrepo
 scanning source...
 collecting CVS rlog
 8 log entries
+cvslog hook: 8 entries
 creating changesets
 5 changeset entries
+cvschangesets hook: 5 changesets
 sorting...
 converting...
 0 ci2
 c
 d
 % convert again with --filemap
 connecting to cvsrepo
 scanning source...
 collecting CVS rlog
 8 log entries
+cvslog hook: 8 entries
 creating changesets
 5 changeset entries
+cvschangesets hook: 5 changesets
 sorting...
 converting...
 0 ci2
 c
 d
 4 ci2 files: b/c
 3 ci1 files: b/c
 2 update tags files: .hgtags
 1 ci0 files: b/c
 0 Initial revision files: b/c
 % commit a new revision with funny log message
 checking in src/a,v
 % convert again
 connecting to cvsrepo
 scanning source...
 collecting CVS rlog
 9 log entries
+cvslog hook: 9 entries
 creating changesets
 6 changeset entries
+cvschangesets hook: 6 changesets
 sorting...
 converting...
 0 funny
 o  6 (branch) funny
 |  ----------------------------
 |  log message files: a
 o  5 (branch) ci2 files: b/c
 
 o  4 () ci1 files: a b/c
 |
 o  3 () update tags files: .hgtags
 |
 o  2 () ci0 files: b/c
 |
 | o  1 (INITIAL) import files:
 |/
 o  0 () Initial revision files: a b/c
 
 % testing debugcvsps
 collecting CVS rlog
 9 log entries
+cvslog hook: 9 entries
 creating changesets
 8 changeset entries
+cvschangesets hook: 8 changesets
 ---------------------
 PatchSet 1 
 Date:
 Author:
 Branch: HEAD
 Tag: (none) 
 Branchpoints: INITIAL 
 Log:
 Initial revision
 
 Members: 
 	a:INITIAL->1.1 
 
 ---------------------
 PatchSet 2 
 Date:
 Author:
 Branch: HEAD
 Tag: (none) 
 Branchpoints: INITIAL, branch 
 Log:
 Initial revision
 
 Members: 
 	b/c:INITIAL->1.1 
 
 ---------------------
 PatchSet 3 
 Date:
 Author:
 Branch: INITIAL
 Tag: start 
 Log:
 import
 
 Members: 
 	a:1.1->1.1.1.1 
 	b/c:1.1->1.1.1.1 
 
 ---------------------
 PatchSet 4 
 Date:
 Author:
 Branch: HEAD
 Tag: (none) 
 Log:
 ci0
 
 Members: 
 	b/c:1.1->1.2 
 
 ---------------------
 PatchSet 5 
 Date:
 Author:
 Branch: HEAD
 Tag: (none) 
 Branchpoints: branch 
 Log:
 ci1
 
 Members: 
 	a:1.1->1.2 
 
 ---------------------
 PatchSet 6 
 Date:
 Author:
 Branch: HEAD
 Tag: (none) 
 Log:
 ci1
 
 Members: 
 	b/c:1.2->1.3 
 
 ---------------------
 PatchSet 7 
 Date:
 Author:
 Branch: branch
 Tag: (none) 
 Log:
 ci2
 
 Members: 
 	b/c:1.1->1.1.2.1 
 
 ---------------------
 PatchSet 8 
 Date:
 Author:
 Branch: branch
 Tag: (none) 
 Log:
 funny
 ----------------------------
 log message
 
 Members: 
 	a:1.2->1.2.2.1 
 

tests/test-convert.out

@@ -1,266 +1,275
 hg convert [OPTION]... SOURCE [DEST [REVMAP]]
 
 convert a foreign SCM repository to a Mercurial one.
 
     Accepted source formats [identifiers]:
 
     - Mercurial [hg]
     - CVS [cvs]
     - Darcs [darcs]
     - git [git]
     - Subversion [svn]
     - Monotone [mtn]
     - GNU Arch [gnuarch]
     - Bazaar [bzr]
     - Perforce [p4]
 
     Accepted destination formats [identifiers]:
 
     - Mercurial [hg]
     - Subversion [svn] (history on branches is not preserved)
 
     If no revision is given, all revisions will be converted. Otherwise,
     convert will only import up to the named revision (given in a format
     understood by the source).
 
     If no destination directory name is specified, it defaults to the basename
     of the source with '-hg' appended. If the destination repository doesn't
     exist, it will be created.
 
     By default, all sources except Mercurial will use --branchsort. Mercurial
     uses --sourcesort to preserve original revision numbers order. Sort modes
     have the following effects:
 
     --branchsort  convert from parent to child revision when possible, which
                   means branches are usually converted one after the other. It
                   generates more compact repositories.
     --datesort    sort revisions by date. Converted repositories have good-
                   looking changelogs but are often an order of magnitude
                   larger than the same ones generated by --branchsort.
     --sourcesort  try to preserve source revisions order, only supported by
                   Mercurial sources.
 
     If <REVMAP> isn't given, it will be put in a default location
     (<dest>/.hg/shamap by default). The <REVMAP> is a simple text file that
     maps each source commit ID to the destination ID for that revision, like
     so:
 
       <source ID> <destination ID>
 
     If the file doesn't exist, it's automatically created. It's updated on
     each commit copied, so convert-repo can be interrupted and can be run
     repeatedly to copy new commits.
 
     The [username mapping] file is a simple text file that maps each source
     commit author to a destination commit author. It is handy for source SCMs
     that use unix logins to identify authors (eg: CVS). One line per author
     mapping and the line format is: srcauthor=whatever string you want
 
     The filemap is a file that allows filtering and remapping of files and
     directories. Comment lines start with '#'. Each line can contain one of
     the following directives:
 
       include path/to/file
 
       exclude path/to/file
 
       rename from/file to/file
 
     The 'include' directive causes a file, or all files under a directory, to
     be included in the destination repository, and the exclusion of all other
     files and directories not explicitly included. The 'exclude' directive
     causes files or directories to be omitted. The 'rename' directive renames
     a file or directory. To rename from a subdirectory into the root of the
     repository, use '.' as the path to rename to.
 
     The splicemap is a file that allows insertion of synthetic history,
     letting you specify the parents of a revision. This is useful if you want
     to e.g. give a Subversion merge two parents, or graft two disconnected
     series of history together. Each entry contains a key, followed by a
     space, followed by one or two comma-separated values. The key is the
     revision ID in the source revision control system whose parents should be
     modified (same format as a key in .hg/shamap). The values are the revision
     IDs (in either the source or destination revision control system) that
     should be used as the new parents for that node. For example, if you have
     merged "release-1.0" into "trunk", then you should specify the revision on
     "trunk" as the first parent and the one on the "release-1.0" branch as the
     second.
 
     The branchmap is a file that allows you to rename a branch when it is
     being brought in from whatever external repository. When used in
     conjunction with a splicemap, it allows for a powerful combination to help
     fix even the most badly mismanaged repositories and turn them into nicely
     structured Mercurial repositories. The branchmap contains lines of the
     form "original_branch_name new_branch_name". "original_branch_name" is the
     name of the branch in the source repository, and "new_branch_name" is the
     name of the branch is the destination repository. This can be used to (for
     instance) move code in one repository from "default" to a named branch.
 
     Mercurial Source
     ----------------
 
     --config convert.hg.ignoreerrors=False    (boolean)
         ignore integrity errors when reading. Use it to fix Mercurial
         repositories with missing revlogs, by converting from and to
         Mercurial.
     --config convert.hg.saverev=False         (boolean)
         store original revision ID in changeset (forces target IDs to change)
     --config convert.hg.startrev=0            (hg revision identifier)
         convert start revision and its descendants
 
     CVS Source
     ----------
 
     CVS source will use a sandbox (i.e. a checked-out copy) from CVS to
     indicate the starting point of what will be converted. Direct access to
     the repository files is not needed, unless of course the repository is
     :local:. The conversion uses the top level directory in the sandbox to
     find the CVS repository, and then uses CVS rlog commands to find files to
     convert. This means that unless a filemap is given, all files under the
     starting directory will be converted, and that any directory
     reorganization in the CVS sandbox is ignored.
 
     The options shown are the defaults.
 
     --config convert.cvsps.cache=True         (boolean)
         Set to False to disable remote log caching, for testing and debugging
         purposes.
     --config convert.cvsps.fuzz=60            (integer)
         Specify the maximum time (in seconds) that is allowed between commits
         with identical user and log message in a single changeset. When very
         large files were checked in as part of a changeset then the default
         may not be long enough.
     --config convert.cvsps.mergeto='{{mergetobranch ([-\w]+)}}'
         Specify a regular expression to which commit log messages are matched.
         If a match occurs, then the conversion process will insert a dummy
         revision merging the branch on which this log message occurs to the
         branch indicated in the regex.
     --config convert.cvsps.mergefrom='{{mergefrombranch ([-\w]+)}}'
         Specify a regular expression to which commit log messages are matched.
         If a match occurs, then the conversion process will add the most
         recent revision on the branch indicated in the regex as the second
         parent of the changeset.
+    --config hook.cvslog
+        Specify a Python function to be called at the end of gathering the CVS
+        log. The function is passed a list with the log entries, and can
+        modify the entries in-place, or add or delete them.
+    --config hook.cvschangesets
+        Specify a Python function to be called after the changesets are
+        calculated from the the CVS log. The function is passed a list with
+        the changeset entries, and can modify the changesets in-place, or add
+        or delete them.
 
     An additional "debugcvsps" Mercurial command allows the builtin changeset
     merging code to be run without doing a conversion. Its parameters and
     output are similar to that of cvsps 2.1. Please see the command help for
     more details.
 
     Subversion Source
     -----------------
 
     Subversion source detects classical trunk/branches/tags layouts. By
     default, the supplied "svn://repo/path/" source URL is converted as a
     single branch. If "svn://repo/path/trunk" exists it replaces the default
     branch. If "svn://repo/path/branches" exists, its subdirectories are
     listed as possible branches. If "svn://repo/path/tags" exists, it is
     looked for tags referencing converted branches. Default "trunk",
     "branches" and "tags" values can be overridden with following options. Set
     them to paths relative to the source URL, or leave them blank to disable
     auto detection.
 
     --config convert.svn.branches=branches    (directory name)
         specify the directory containing branches
     --config convert.svn.tags=tags            (directory name)
         specify the directory containing tags
     --config convert.svn.trunk=trunk          (directory name)
         specify the name of the trunk branch
 
     Source history can be retrieved starting at a specific revision, instead
     of being integrally converted. Only single branch conversions are
     supported.
 
     --config convert.svn.startrev=0           (svn revision number)
         specify start Subversion revision.
 
     Perforce Source
     ---------------
 
     The Perforce (P4) importer can be given a p4 depot path or a client
     specification as source. It will convert all files in the source to a flat
     Mercurial repository, ignoring labels, branches and integrations. Note
     that when a depot path is given you then usually should specify a target
     directory, because otherwise the target may be named ...-hg.
 
     It is possible to limit the amount of source history to be converted by
     specifying an initial Perforce revision.
 
     --config convert.p4.startrev=0            (perforce changelist number)
         specify initial Perforce revision.
 
     Mercurial Destination
     ---------------------
 
     --config convert.hg.clonebranches=False   (boolean)
         dispatch source branches in separate clones.
     --config convert.hg.tagsbranch=default    (branch name)
         tag revisions branch name
     --config convert.hg.usebranchnames=True   (boolean)
         preserve branch names
 
 options:
 
  -A --authors      username mapping filename
  -d --dest-type    destination repository type
     --filemap      remap file names using contents of file
  -r --rev          import up to target revision REV
  -s --source-type  source repository type
     --splicemap    splice synthesized history into place
     --branchmap    change branch names while converting
     --branchsort   try to sort changesets by branches
     --datesort     try to sort changesets by date
     --sourcesort   preserve source changesets order
 
 use "hg -v help convert" to show global options
 adding a
 assuming destination a-hg
 initializing destination a-hg repository
 scanning source...
 sorting...
 converting...
 4 a
 3 b
 2 c
 1 d
 0 e
 pulling from ../a
 searching for changes
 no changes found
 % should fail
 initializing destination bogusfile repository
 abort: cannot create new bundle repository
 % should fail
 abort: Permission denied: bogusdir
 % should succeed
 initializing destination bogusdir repository
 scanning source...
 sorting...
 converting...
 4 a
 3 b
 2 c
 1 d
 0 e
 % test pre and post conversion actions
 run hg source pre-conversion action
 run hg sink pre-conversion action
 run hg sink post-conversion action
 run hg source post-conversion action
 % converting empty dir should fail nicely
 assuming destination emptydir-hg
 initializing destination emptydir-hg repository
 emptydir does not look like a CVS checkout
 emptydir does not look like a Git repo
 emptydir does not look like a Subversion repo
 emptydir is not a local Mercurial repo
 emptydir does not look like a darcs repo
 emptydir does not look like a monotone repo
 emptydir does not look like a GNU Arch repo
 emptydir does not look like a Bazaar repo
 cannot find required "p4" tool
 abort: emptydir: missing or unsupported repository
 % convert with imaginary source type
 initializing destination a-foo repository
 abort: foo: invalid source repository type
 % convert with imaginary sink type
 abort: foo: invalid destination repository type