# convert.py Foreign SCM converter

#

# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms of the

'''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.

    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]...')),

}