/brz/remove-bazaar

# Copyright (C) 2008 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Fast, stream-based importing of data into Bazaar."""

from bzrlib.commands import Command, register_command

from bzrlib.option import Option, ListOption

def test_suite():

    import tests

    return tests.test_suite()

def _run(source, processor_factory, control, params, verbose):

    """Create and run a processor.

    :param source: a filename or '-' for standard input

    :param processor_factory: a callable for creating a processor

    :param control: the BzrDir of the destination or None if no

      destination is expected

    """

    import parser

    if source == '-':

        import sys

        stream = sys.stdin

    else:

        stream = open(source)

    proc = processor_factory(control, params=params, verbose=verbose)

    p = parser.ImportParser(stream, verbose=verbose)

    return proc.process(p.iter_commands)

class cmd_fast_import(Command):

    """Backend for fast Bazaar data importers.

    This command reads a mixed command/data stream and

    creates branches in the current repository accordingly.

    To specify standard input as the input stream, use a

    source name of '-'.

    The usual recipe is::

      bzr init-repo .

      front-end | bzr fast-import -

    If run inside a branch using a shared repository, then

    the current branch is made the trunk and other branches,

    if any, are created in sister directories. If run inside

    a standalone tree, the current branch is also made the

    trunk, but warnings are output about other branches found.

    The stream format is upwardly compatible with git-fast-import

    so existing front-ends for that tool can typically be reused

    without changes. See http://bazaar-vcs.org/BzrFastImport for

    links to matching exporters from Subversion, CVS, Git,

    Mercurial, Darcs, Perforce and SCCS.

    While reusing an existing format with existing frontends is

    great, it does mean a slightly more complex recipe when

    importing large projects via exporters that reuse blob data

    across commits, namely::

      bzr init-repo .

      front-end > xxx.fi

      bzr fast-export-info -v xxx.fi > xxx.cfg

      bzr fast-export xxx.fi --info xxx.cfg

    In this scenario, the xxx.cfg file generated by the first pass

    holds caching hints that the second pass uses to lower memory

    usage.

    At checkpoints and on completion, the commit-id -> revision-id

    map is saved to a file called 'fastimport-id-map' in the control

    directory for the repository (e.g. .bzr/repository). If the import

    is interrupted or unexpectedly crashes, it can be started again

    and this file will be used to skip over already loaded revisions.

    As long as subsequent exports from the original source begin

    with exactly the same revisions, you can use this feature to

    maintain a mirror of a repository managed by a foreign tool.

    If and when Bazaar is used to manage the repository, this file

    can be safely deleted.

    If you wish to write a custom exporter for your project, see

    http://bazaar-vcs.org/BzrFastImport for the detailed protocol

    specification. In many cases, exporters can be written quite

    quickly using whatever scripting/programming language you like.

    Examples::

     cd /git/repo/path

     git-fast-export --signed-tags=warn | bzr fast-import -

        Import a Git repository into Bazaar.

     svn-fast-export.py /svn/repo/path | bzr fast-import -

        Import a Subversion repository into Bazaar.

     hg-fast-export.py -r /hg/repo/path | bzr fast-import -

        Import a Mercurial repository into Bazaar.

    """

    hidden = True

    _see_also = ['fast-import-info', 'fast-import-filter']

    takes_args = ['source']

    takes_options = ['verbose',

                    Option('info', type=str,

                        help="Path to file containing caching hints.",

                        ),

                    Option('trees',

                        help="Update working trees.",

                        ),

                    Option('checkpoint', type=int,

                        help="Checkpoint automatically every N revisions.",

                        ),

                    Option('count', type=int,

                        help="Import this many revisions then exit.",

                        ),

                    Option('inv-cache', type=int,

                        help="Number of inventories to cache.",

                        ),

                    Option('experimental',

                        help="Enable experimental features.",

                        ),

                     ]

    aliases = []

    def run(self, source, verbose=False, info=None, trees=False,

        checkpoint=10000, count=-1, inv_cache=10, experimental=True):

        from bzrlib import bzrdir

        from bzrlib.plugins.fastimport.processors import generic_processor

        control, relpath = bzrdir.BzrDir.open_containing('.')

        params = {

            'info': info,

            'trees': trees,

            'checkpoint': checkpoint,

            'count': count,

            'inv-cache': inv_cache,

            'experimental': experimental,

            }

        return _run(source, generic_processor.GenericProcessor, control,

            params, verbose)

class cmd_fast_import_info(Command):

    """Output information about a fast-import stream.

    This command reads a fast-import stream and outputs

    statistics and interesting properties about what it finds.

    When run in verbose mode, the information is output as a

    configuration file that can be passed to fast-import to

    assist it in intelligently caching objects.

    To specify standard input as the input stream, use a source

    name of '-'.

    Examples::

     front-end | bzr fast-import-info -

        Display statistics about the import stream produced by front-end.

     front-end | bzr fast-import-info -v - > front-end.cfg

       Create a hints file for running fast-import on a large repository.

    """

    hidden = True

    _see_also = ['fast-import']

    takes_args = ['source']

    takes_options = ['verbose']

    aliases = []

    def run(self, source, verbose=False):

        from bzrlib.plugins.fastimport.processors import info_processor

        return _run(source, info_processor.InfoProcessor, None, {}, verbose)

class cmd_fast_import_filter(Command):

    """Filter a fast-import stream displaying selected commands.

    To specify standard input as the input stream, use a source

    name of '-'. To specify the commands to display, use the -C

    option one or more times. To specify just some fields for

    a command, use the syntax::

      command=field1,...

    By default, the nominated fields for the nominated commands

    are displayed tab separated. To see the information in

    a name:value format, use verbose mode.

    Note: Binary fields (e.g. data for blobs) are masked out

    so it is generally safe to view the output in a terminal.

    Examples::

      front-end > xxx.fi

      bzr fast-import-filter xxx.fi -Creset -Ctag

        Show all the fields of the reset and tag commands.

      bzr fast-import-filter xxx.fi -Ccommit=mark,merge

        Show the mark and merge fields of the commit commands.

    """

    hidden = True

    _see_also = ['fast-import']

    takes_args = ['source']

    takes_options = ['verbose',

                    ListOption('commands', short_name='C', type=str,

                        help="Display fields for these commands."

                        ),

                     ]

    aliases = []

    def run(self, source, verbose=False, commands=None):

        from bzrlib.plugins.fastimport.processors import filter_processor

        from bzrlib.plugins.fastimport import helpers

        params = helpers.defines_to_dict(commands)

        return _run(source, filter_processor.FilterProcessor, None, params,

            verbose)

register_command(cmd_fast_import)

register_command(cmd_fast_import_info)

register_command(cmd_fast_import_filter)