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  • Committer: Robert Collins
  • Date: 2010-05-04 06:22:51 UTC
  • mto: This revision was merged to the branch mainline in revision 5206.
  • Revision ID: robertc@robertcollins.net-20100504062251-1ocjhrl53mum9ehw
Minor local_abspath docstring improvement.

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bzrlib/uncommit.py
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#!/usr/bin/env python
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"""\
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Remove the last revision from the history of the current branch.
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"""
5
 
 
6
 
import os
7
 
import bzrlib
8
 
 
9
 
def test_remove(filename):
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    if os.path.exists(filename):
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        os.remove(filename)
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    else:
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        print '* file does not exist: %r' % filename
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15
 
 
16
 
def uncommit(branch, remove_files=False,
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        dry_run=False, verbose=False, revno=None):
 
1
# Copyright (C) 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
16
 
 
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"""Remove the last revision from the history of the current branch."""
 
18
 
 
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# TODO: make the guts of this methods on tree, branch.
 
20
 
 
21
from bzrlib import (
 
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    errors,
 
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    revision as _mod_revision,
 
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    )
 
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from bzrlib.branch import Branch
 
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from bzrlib.errors import BoundBranchOutOfDate
 
27
 
 
28
 
 
29
def uncommit(branch, dry_run=False, verbose=False, revno=None, tree=None,
 
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             local=False):
18
31
    """Remove the last revision from the supplied branch.
19
32
 
20
 
    :param remove_files: If True, remove files from the stores
21
 
        as well.
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    :param force: Don't ask any questions
 
33
    :param dry_run: Don't actually change anything
 
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    :param verbose: Print each step as you do it
 
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    :param revno: Remove back to this revision
 
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    :param local: If this branch is bound, only remove the revisions from the
 
37
        local branch. If this branch is not bound, it is an error to pass
 
38
        local=True.
23
39
    """
24
 
    from bzrlib.atomicfile import AtomicFile
25
 
    rh = branch.revision_history()
26
 
    if revno is None:
27
 
        revno = len(rh)
28
 
 
29
 
    files_to_remove = []
30
 
    new_rev_history = AtomicFile(branch.controlfilename('revision-history'))
31
 
    for r in range(revno-1, len(rh)):
32
 
        rev_id = rh.pop()
33
 
        if verbose:
34
 
            print 'Removing revno %d: %s' % (len(rh)+1, rev_id)
35
 
        rev = branch.get_revision(rev_id)
36
 
        inv = branch.get_revision_inventory(rev_id)
37
 
        inv_prev = []
38
 
        for p in rev.parent_ids:
39
 
            inv_prev.append(branch.get_revision_inventory(p))
40
 
 
41
 
        if remove_files:
42
 
            # Figure out what text-store entries are new
43
 
 
44
 
            # In the future, when we have text_version instead of
45
 
            # text_id, we can just check to see if the text_version
46
 
            # equals the current revision id.
47
 
            for file_id in inv:
48
 
                ie = inv[file_id]
49
 
                if not hasattr(ie, 'text_id'):
50
 
                    continue
51
 
                for other_inv in inv_prev:
52
 
                    if file_id in other_inv:
53
 
                        other_ie = other_inv[file_id]
54
 
                        if other_ie.text_id == ie.text_id:
55
 
                            break
 
40
    unlockable = []
 
41
    try:
 
42
        if tree is not None:
 
43
            tree.lock_write()
 
44
            unlockable.append(tree)
 
45
 
 
46
        branch.lock_write()
 
47
        unlockable.append(branch)
 
48
 
 
49
        pending_merges = []
 
50
        if tree is not None:
 
51
            pending_merges = tree.get_parent_ids()[1:]
 
52
 
 
53
        if local:
 
54
            master = None
 
55
            if branch.get_bound_location() is None:
 
56
                raise errors.LocalRequiresBoundBranch()
 
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        else:
 
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            master = branch.get_master_branch()
 
59
            if master is not None:
 
60
                master.lock_write()
 
61
                unlockable.append(master)
 
62
        old_revno, old_tip = branch.last_revision_info()
 
63
        if master is not None and old_tip != master.last_revision():
 
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            raise BoundBranchOutOfDate(branch, master)
 
65
        if revno is None:
 
66
            revno = old_revno
 
67
        new_revno = revno - 1
 
68
 
 
69
        revid_iterator = branch.repository.iter_reverse_revision_history(
 
70
                            old_tip)
 
71
        cur_revno = old_revno
 
72
        new_revision_id = old_tip
 
73
        graph = branch.repository.get_graph()
 
74
        for rev_id in revid_iterator:
 
75
            if cur_revno == new_revno:
 
76
                new_revision_id = rev_id
 
77
                break
 
78
            if verbose:
 
79
                print 'Removing revno %d: %s' % (cur_revno, rev_id)
 
80
            cur_revno -= 1
 
81
            parents = graph.get_parent_map([rev_id]).get(rev_id, None)
 
82
            if not parents:
 
83
                continue
 
84
            # When we finish popping off the pending merges, we want
 
85
            # them to stay in the order that they used to be.
 
86
            # but we pop from the end, so reverse the order, and
 
87
            # then get the order right at the end
 
88
            pending_merges.extend(reversed(parents[1:]))
 
89
        else:
 
90
            # We ran off the end of revisions, which means we should be trying
 
91
            # to get to NULL_REVISION
 
92
            new_revision_id = _mod_revision.NULL_REVISION
 
93
 
 
94
        if not dry_run:
 
95
            if master is not None:
 
96
                master.set_last_revision_info(new_revno, new_revision_id)
 
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            branch.set_last_revision_info(new_revno, new_revision_id)
 
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            if master is None:
 
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                hook_local = None
 
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                hook_master = branch
 
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            else:
 
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                hook_local = branch
 
103
                hook_master = master
 
104
            for hook in Branch.hooks['post_uncommit']:
 
105
                hook_new_tip = new_revision_id
 
106
                if hook_new_tip == _mod_revision.NULL_REVISION:
 
107
                    hook_new_tip = None
 
108
                hook(hook_local, hook_master, old_revno, old_tip, new_revno,
 
109
                     hook_new_tip)
 
110
            if tree is not None:
 
111
                if not _mod_revision.is_null(new_revision_id):
 
112
                    parents = [new_revision_id]
56
113
                else:
57
 
                    # None of the previous ancestors used
58
 
                    # the same inventory
59
 
                    files_to_remove.append(branch.controlfilename(['text-store',
60
 
                        ie.text_id + '.gz']))
61
 
            rev_file = branch.controlfilename(['revision-store',
62
 
                    rev_id + '.gz'])
63
 
            files_to_remove.append(rev_file)
64
 
            inv_file = branch.controlfilename(['inventory-store',
65
 
                    rev.inventory_id + '.gz'])
66
 
            files_to_remove.append(inv_file)
67
 
 
68
 
    if verbose and files_to_remove:
69
 
        print 'Removing files:'
70
 
        for f in files_to_remove:
71
 
            print '\t%s' % branch.relpath(f)
72
 
 
73
 
    new_rev_history.write('\n'.join(rh))
74
 
 
75
 
    # Committing before we start removing files, because
76
 
    # once we have removed at least one, all the rest are invalid.
77
 
    if not dry_run:
78
 
        new_rev_history.commit()
79
 
        if remove_files:
80
 
            # Actually start removing files
81
 
            for f in files_to_remove:
82
 
                test_remove(f)
83
 
 
84
 
    else:
85
 
        new_rev_history.abort()
86
 
 
87
 
 
 
114
                    parents = []
 
115
                parents.extend(reversed(pending_merges))
 
116
                tree.set_parent_ids(parents)
 
117
    finally:
 
118
        for item in reversed(unlockable):
 
119
            item.unlock()