~bzr-pqm/bzr/bzr.dev

1065 by Martin Pool
- add tool to try conversion of history into revfiles
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#! /usr/bin/python
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# Copyright (C) 2005 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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"""Experiment in converting existing bzr branches to weaves."""
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import bzrlib.branch
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from bzrlib.revfile import Revfile
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from bzrlib.progress import ProgressBar
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import tempfile
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import hotshot, hotshot.stats
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import sys
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def convert():
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    pb = ProgressBar()
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    inv_rf = Revfile('revfiles/inventory', 'w')
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    last_text_sha = {}
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    text_rfs = {}
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    b = bzrlib.branch.find_branch('.')
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    revno = 1
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    rev_history = b.revision_history()
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    last_idx = None
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    for rev_id in rev_history:
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        pb.update('converting inventory', revno, len(rev_history))
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        inv_xml = b.get_inventory_xml(rev_id).read()
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        new_idx = inv_rf.add(inv_xml, last_idx, compress=False)
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        tree = b.revision_tree(rev_id)
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        inv = tree.inventory
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        # for each file in the inventory, put it into its own revfile
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        for file_id in inv:
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            ie = inv[file_id]
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            if ie.kind != 'file':
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                continue
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            if last_text_sha.get(file_id) == ie.text_sha1:
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                # same as last time
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                continue
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            last_text_sha[file_id] = ie.text_sha1
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            # new text (though possibly already stored); need to store it
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            text = tree.get_file(file_id).read()
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            if file_id not in text_rfs:
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                text_rfs[file_id] = Revfile('revfiles/' + file_id, 'w')
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            rf = text_rfs[file_id]
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            last = len(rf)
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            if last == 0:
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                last = None
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            else:
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                last -= 1
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            rf.add(text, last, compress=True)
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        last_idx = new_idx
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        revno += 1
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    pb.clear()
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def profile_convert(): 
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    prof_f = tempfile.NamedTemporaryFile()
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    prof = hotshot.Profile(prof_f.name)
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    prof.runcall(convert) 
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    prof.close()
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    stats = hotshot.stats.load(prof_f.name)
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    #stats.strip_dirs()
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    stats.sort_stats('time')
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    ## XXX: Might like to write to stderr or the trace file instead but
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    ## print_stats seems hardcoded to stdout
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    stats.print_stats(20)
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if '-p' in sys.argv[1:]:
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    profile_convert()
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else:
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    convert()
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