296 lines
12 KiB
Python
296 lines
12 KiB
Python
# convert.py Foreign SCM converter
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#
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2, incorporated herein by reference.
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'''import revisions from foreign VCS repositories into Mercurial'''
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import convcmd
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import cvsps
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import subversion
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from mercurial import commands
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from mercurial.i18n import _
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# Commands definition was moved elsewhere to ease demandload job.
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def convert(ui, src, dest=None, revmapfile=None, **opts):
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"""convert a foreign SCM repository to a Mercurial one.
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Accepted source formats [identifiers]:
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- Mercurial [hg]
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- CVS [cvs]
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- Darcs [darcs]
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- git [git]
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- Subversion [svn]
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- Monotone [mtn]
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- GNU Arch [gnuarch]
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- Bazaar [bzr]
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- Perforce [p4]
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Accepted destination formats [identifiers]:
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- Mercurial [hg]
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- Subversion [svn] (history on branches is not preserved)
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If no revision is given, all revisions will be converted.
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Otherwise, convert will only import up to the named revision
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(given in a format understood by the source).
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If no destination directory name is specified, it defaults to the
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basename of the source with '-hg' appended. If the destination
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repository doesn't exist, it will be created.
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By default, all sources except Mercurial will use --branchsort.
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Mercurial uses --sourcesort to preserve original revision numbers
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order. Sort modes have the following effects:
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--branchsort convert from parent to child revision when possible,
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which means branches are usually converted one after
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the other. It generates more compact repositories.
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--datesort sort revisions by date. Converted repositories have
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good-looking changelogs but are often an order of
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magnitude larger than the same ones generated by
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--branchsort.
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--sourcesort try to preserve source revisions order, only
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supported by Mercurial sources.
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If <REVMAP> isn't given, it will be put in a default location
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(<dest>/.hg/shamap by default). The <REVMAP> is a simple text file
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that maps each source commit ID to the destination ID for that
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revision, like so::
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<source ID> <destination ID>
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If the file doesn't exist, it's automatically created. It's
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updated on each commit copied, so convert-repo can be interrupted
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and can be run repeatedly to copy new commits.
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The [username mapping] file is a simple text file that maps each
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source commit author to a destination commit author. It is handy
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for source SCMs that use unix logins to identify authors (eg:
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CVS). One line per author mapping and the line format is:
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srcauthor=whatever string you want
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The filemap is a file that allows filtering and remapping of files
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and directories. Comment lines start with '#'. Each line can
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contain one of the following directives::
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include path/to/file
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exclude path/to/file
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rename from/file to/file
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The 'include' directive causes a file, or all files under a
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directory, to be included in the destination repository, and the
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exclusion of all other files and directories not explicitly
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included. The 'exclude' directive causes files or directories to
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be omitted. The 'rename' directive renames a file or directory. To
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rename from a subdirectory into the root of the repository, use
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'.' as the path to rename to.
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The splicemap is a file that allows insertion of synthetic
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history, letting you specify the parents of a revision. This is
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useful if you want to e.g. give a Subversion merge two parents, or
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graft two disconnected series of history together. Each entry
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contains a key, followed by a space, followed by one or two
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comma-separated values. The key is the revision ID in the source
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revision control system whose parents should be modified (same
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format as a key in .hg/shamap). The values are the revision IDs
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(in either the source or destination revision control system) that
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should be used as the new parents for that node.
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The branchmap is a file that allows you to rename a branch when it is
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being brought in from whatever external repository. When used in
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conjunction with a splicemap, it allows for a powerful combination
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to help fix even the most badly mismanaged repositories and turn them
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into nicely structured Mercurial repositories. The branchmap contains
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lines of the form "original_branch_name new_branch_name".
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"original_branch_name" is the name of the branch in the source
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repository, and "new_branch_name" is the name of the branch is the
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destination repository. This can be used to (for instance) move code
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in one repository from "default" to a named branch.
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Mercurial Source
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----------------
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--config convert.hg.ignoreerrors=False (boolean)
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ignore integrity errors when reading. Use it to fix Mercurial
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repositories with missing revlogs, by converting from and to
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Mercurial.
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--config convert.hg.saverev=False (boolean)
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store original revision ID in changeset (forces target IDs to
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change)
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--config convert.hg.startrev=0 (hg revision identifier)
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convert start revision and its descendants
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CVS Source
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----------
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CVS source will use a sandbox (i.e. a checked-out copy) from CVS
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to indicate the starting point of what will be converted. Direct
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access to the repository files is not needed, unless of course the
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repository is :local:. The conversion uses the top level directory
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in the sandbox to find the CVS repository, and then uses CVS rlog
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commands to find files to convert. This means that unless a
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filemap is given, all files under the starting directory will be
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converted, and that any directory reorganization in the CVS
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sandbox is ignored.
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Because CVS does not have changesets, it is necessary to collect
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individual commits to CVS and merge them into changesets. CVS
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source uses its internal changeset merging code by default but can
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be configured to call the external 'cvsps' program by setting::
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--config convert.cvsps='cvsps -A -u --cvs-direct -q'
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This option is deprecated and will be removed in Mercurial 1.4.
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The options shown are the defaults.
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Internal cvsps is selected by setting ::
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--config convert.cvsps=builtin
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and has a few more configurable options:
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--config convert.cvsps.cache=True (boolean)
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Set to False to disable remote log caching, for testing and
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debugging purposes.
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--config convert.cvsps.fuzz=60 (integer)
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Specify the maximum time (in seconds) that is allowed between
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commits with identical user and log message in a single
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changeset. When very large files were checked in as part of a
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changeset then the default may not be long enough.
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--config convert.cvsps.mergeto='{{mergetobranch ([-\\w]+)}}'
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Specify a regular expression to which commit log messages are
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matched. If a match occurs, then the conversion process will
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insert a dummy revision merging the branch on which this log
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message occurs to the branch indicated in the regex.
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--config convert.cvsps.mergefrom='{{mergefrombranch ([-\\w]+)}}'
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Specify a regular expression to which commit log messages are
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matched. If a match occurs, then the conversion process will
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add the most recent revision on the branch indicated in the
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regex as the second parent of the changeset.
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The hgext/convert/cvsps wrapper script allows the builtin
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changeset merging code to be run without doing a conversion. Its
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parameters and output are similar to that of cvsps 2.1.
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Subversion Source
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-----------------
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Subversion source detects classical trunk/branches/tags layouts.
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By default, the supplied "svn://repo/path/" source URL is
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converted as a single branch. If "svn://repo/path/trunk" exists it
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replaces the default branch. If "svn://repo/path/branches" exists,
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its subdirectories are listed as possible branches. If
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"svn://repo/path/tags" exists, it is looked for tags referencing
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converted branches. Default "trunk", "branches" and "tags" values
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can be overridden with following options. Set them to paths
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relative to the source URL, or leave them blank to disable auto
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detection.
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--config convert.svn.branches=branches (directory name)
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specify the directory containing branches
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--config convert.svn.tags=tags (directory name)
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specify the directory containing tags
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--config convert.svn.trunk=trunk (directory name)
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specify the name of the trunk branch
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Source history can be retrieved starting at a specific revision,
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instead of being integrally converted. Only single branch
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conversions are supported.
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--config convert.svn.startrev=0 (svn revision number)
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specify start Subversion revision.
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Perforce Source
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---------------
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The Perforce (P4) importer can be given a p4 depot path or a
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client specification as source. It will convert all files in the
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source to a flat Mercurial repository, ignoring labels, branches
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and integrations. Note that when a depot path is given you then
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usually should specify a target directory, because otherwise the
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target may be named ...-hg.
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It is possible to limit the amount of source history to be
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converted by specifying an initial Perforce revision.
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--config convert.p4.startrev=0 (perforce changelist number)
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specify initial Perforce revision.
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Mercurial Destination
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---------------------
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--config convert.hg.clonebranches=False (boolean)
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dispatch source branches in separate clones.
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--config convert.hg.tagsbranch=default (branch name)
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tag revisions branch name
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--config convert.hg.usebranchnames=True (boolean)
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preserve branch names
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"""
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return convcmd.convert(ui, src, dest, revmapfile, **opts)
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def debugsvnlog(ui, **opts):
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return subversion.debugsvnlog(ui, **opts)
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def debugcvsps(ui, *args, **opts):
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'''create changeset information from CVS
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This command is intended as a debugging tool for the CVS to
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Mercurial converter, and can be used as a direct replacement for
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cvsps.
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Hg debugcvsps reads the CVS rlog for current directory (or any
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named directory) in the CVS repository, and converts the log to a
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series of changesets based on matching commit log entries and
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dates.'''
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return cvsps.debugcvsps(ui, *args, **opts)
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commands.norepo += " convert debugsvnlog debugcvsps"
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cmdtable = {
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"convert":
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(convert,
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[('A', 'authors', '', _('username mapping filename')),
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('d', 'dest-type', '', _('destination repository type')),
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('', 'filemap', '', _('remap file names using contents of file')),
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('r', 'rev', '', _('import up to target revision REV')),
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('s', 'source-type', '', _('source repository type')),
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('', 'splicemap', '', _('splice synthesized history into place')),
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('', 'branchmap', '', _('change branch names while converting')),
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('', 'branchsort', None, _('try to sort changesets by branches')),
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('', 'datesort', None, _('try to sort changesets by date')),
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('', 'sourcesort', None, _('preserve source changesets order'))],
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_('hg convert [OPTION]... SOURCE [DEST [REVMAP]]')),
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"debugsvnlog":
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(debugsvnlog,
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[],
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'hg debugsvnlog'),
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"debugcvsps":
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(debugcvsps,
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[
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# Main options shared with cvsps-2.1
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('b', 'branches', [], _('only return changes on specified branches')),
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('p', 'prefix', '', _('prefix to remove from file names')),
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('r', 'revisions', [], _('only return changes after or between specified tags')),
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('u', 'update-cache', None, _("update cvs log cache")),
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('x', 'new-cache', None, _("create new cvs log cache")),
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('z', 'fuzz', 60, _('set commit time fuzz in seconds')),
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('', 'root', '', _('specify cvsroot')),
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# Options specific to builtin cvsps
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('', 'parents', '', _('show parent changesets')),
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('', 'ancestors', '', _('show current changeset in ancestor branches')),
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# Options that are ignored for compatibility with cvsps-2.1
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('A', 'cvs-direct', None, _('ignored for compatibility')),
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],
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_('hg debugcvsps [OPTION]... [PATH]...')),
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}
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