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Viewing changes to patience-test.py

  • Committer: Martin Pool
  • Date: 2005-06-10 09:08:09 UTC
  • Revision ID: mbp@sourcefrog.net-20050610090809-648401fe0bde7b7a
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patience-test.py
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#!/usr/bin/env python2.4
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# Copyright (C) 2006 by Canonical Ltd
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#
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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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#
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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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#
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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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import difflib
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from StringIO import StringIO
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from subprocess import Popen, PIPE
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from tempfile import mkdtemp
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from bzrlib.branch import Branch
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from bzrlib.patiencediff import SequenceMatcher
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from bzrlib.diff import internal_diff
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from bzrlib.osutils import pathjoin
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def patch(path, patch_lines):
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    """Apply a patch to a branch, using patch(1).  URLs may be used."""
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    cmd = ['patch', '--quiet', path]
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    r = 0
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    child_proc = Popen(cmd, stdin=PIPE)
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    for line in patch_lines:
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        child_proc.stdin.write(line)
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    child_proc.stdin.close()
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    r = child_proc.wait()
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    return r
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old_total = 0
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new_total = 0
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b = Branch.open_containing('.')[0]
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repo = b.repository
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repo.lock_write()
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try:
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    temp_dir = mkdtemp()
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    transaction = repo.get_transaction()
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    file_list = list(repo.text_store)
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    for i, file_id in enumerate(file_list):
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        print "%.2f%% %d of %d %s" % ((float(i)/len(file_list) * 100), i,
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                                    len(file_list), file_id)
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        versioned_file = repo.text_store.get_weave(file_id, transaction)
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        last_id = None
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        for revision_id in versioned_file.versions():
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            if last_id != None:
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                old_lines = versioned_file.get_lines(last_id)
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                new_lines = versioned_file.get_lines(revision_id)
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                if ''.join(old_lines) == ''.join(new_lines):
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                    continue
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                new_patch = StringIO()
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                try:
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                    internal_diff('old', old_lines, 'new', new_lines, new_patch,
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                                  sequence_matcher=SequenceMatcher)
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                except:
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                    file(pathjoin(temp_dir, 'old'), 
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                         'wb').write(''.join(old_lines))
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                    file(pathjoin(temp_dir, 'new'), 
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                         'wb').write(''.join(new_lines))
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                    print "temp dir is %s" % temp_dir
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                    raise
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                old_patch = StringIO()
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                internal_diff('old', old_lines, 'new', new_lines, old_patch,
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                              sequence_matcher=difflib.SequenceMatcher)
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                old_total += len(old_patch.getvalue())
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                new_total += len(new_patch.getvalue())
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                new_patch.seek(0)
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                file_path = pathjoin(temp_dir, 'file')
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                orig_file = file(file_path, 'wb')
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                for line in old_lines:
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                    orig_file.write(line)
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                orig_file.close()
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                patch(file_path, new_patch)
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                new_file = file(file_path, 'rb')
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                assert list(new_file) == new_lines
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            last_id = revision_id
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    print old_total, new_total
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finally:
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    repo.unlock()