hgext/convert/__init__.py

# 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.

    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.

    Because CVS does not have changesets, it is necessary to collect
    individual commits to CVS and merge them into changesets. CVS source uses
    its internal changeset merging code by default but can be configured to
    call the external 'cvsps' program by setting:

        --config convert.cvsps='cvsps -A -u --cvs-direct -q'

    This option is deprecated and will be removed in Mercurial 1.4.

    The options shown are the defaults.

    Internal cvsps is selected by setting

        --config convert.cvsps=builtin

    and has a few more configurable options:
        --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.

    The hgext/convert/cvsps wrapper script 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.

    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]...')),
}