~bzr-pqm/bzr/bzr.dev

#! /usr/bin/python

# Copyright (C) 2005 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

"""Experiment in converting existing bzr branches to weaves."""

import bzrlib.branch

from bzrlib.revfile import Revfile

from bzrlib.progress import ProgressBar

import tempfile

import hotshot, hotshot.stats

import sys

def convert():

    pb = ProgressBar()

    inv_rf = Revfile('revfiles/inventory', 'w')

    last_text_sha = {}

    text_rfs = {}

    b = bzrlib.branch.find_branch('.')

    revno = 1

    rev_history = b.revision_history()

    last_idx = None

    for rev_id in rev_history:

        pb.update('converting inventory', revno, len(rev_history))

        inv_xml = b.get_inventory_xml(rev_id).read()

        new_idx = inv_rf.add(inv_xml, last_idx, compress=False)

        tree = b.revision_tree(rev_id)

        inv = tree.inventory

        # for each file in the inventory, put it into its own revfile

        for file_id in inv:

            ie = inv[file_id]

            if ie.kind != 'file':

                continue

            if last_text_sha.get(file_id) == ie.text_sha1:

                # same as last time

                continue

            last_text_sha[file_id] = ie.text_sha1

            # new text (though possibly already stored); need to store it

            text = tree.get_file(file_id).read()

            if file_id not in text_rfs:

                text_rfs[file_id] = Revfile('revfiles/' + file_id, 'w')

            rf = text_rfs[file_id]

            last = len(rf)

            if last == 0:

                last = None

            else:

                last -= 1

            rf.add(text, last, compress=True)

        last_idx = new_idx

        revno += 1

    pb.clear()

def profile_convert(): 

    prof_f = tempfile.NamedTemporaryFile()

    prof = hotshot.Profile(prof_f.name)

    prof.runcall(convert) 

    prof.close()

    stats = hotshot.stats.load(prof_f.name)

    #stats.strip_dirs()

    stats.sort_stats('time')

    ## XXX: Might like to write to stderr or the trace file instead but

    ## print_stats seems hardcoded to stdout

    stats.print_stats(20)

if '-p' in sys.argv[1:]:

    profile_convert()

else:

    convert()