mercurial/simplemerge.py
author Matt Mackall <mpm@selenic.com>
Thu, 18 Jul 2013 16:29:05 -0500
changeset 19445 29c726e9c3ab
parent 16687 e34106fa0dc3
child 21272 4aeb7a6029ba
permissions -rw-r--r--
tests: update for commit --secret
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# Copyright (C) 2004, 2005 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, see <http://www.gnu.org/licenses/>.
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# mbp: "you know that thing where cvs gives you conflict markers?"
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# s: "i hate that."
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from i18n import _
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import scmutil, util, mdiff
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import sys, os
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class CantReprocessAndShowBase(Exception):
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    pass
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def intersect(ra, rb):
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    """Given two ranges return the range where they intersect or None.
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    >>> intersect((0, 10), (0, 6))
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    (0, 6)
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    >>> intersect((0, 10), (5, 15))
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    (5, 10)
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    >>> intersect((0, 10), (10, 15))
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    >>> intersect((0, 9), (10, 15))
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    >>> intersect((0, 9), (7, 15))
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    (7, 9)
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    """
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    assert ra[0] <= ra[1]
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    assert rb[0] <= rb[1]
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    sa = max(ra[0], rb[0])
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    sb = min(ra[1], rb[1])
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    if sa < sb:
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        return sa, sb
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    else:
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        return None
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def compare_range(a, astart, aend, b, bstart, bend):
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    """Compare a[astart:aend] == b[bstart:bend], without slicing.
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    """
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    if (aend - astart) != (bend - bstart):
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        return False
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    for ia, ib in zip(xrange(astart, aend), xrange(bstart, bend)):
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        if a[ia] != b[ib]:
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            return False
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    else:
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        return True
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class Merge3Text(object):
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    """3-way merge of texts.
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    Given strings BASE, OTHER, THIS, tries to produce a combined text
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    incorporating the changes from both BASE->OTHER and BASE->THIS."""
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    def __init__(self, basetext, atext, btext, base=None, a=None, b=None):
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        self.basetext = basetext
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        self.atext = atext
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        self.btext = btext
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        if base is None:
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            base = mdiff.splitnewlines(basetext)
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        if a is None:
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            a = mdiff.splitnewlines(atext)
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        if b is None:
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            b = mdiff.splitnewlines(btext)
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        self.base = base
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        self.a = a
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        self.b = b
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    def merge_lines(self,
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                    name_a=None,
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                    name_b=None,
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                    name_base=None,
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                    start_marker='<<<<<<<',
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                    mid_marker='=======',
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                    end_marker='>>>>>>>',
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                    base_marker=None,
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                    reprocess=False):
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        """Return merge in cvs-like form.
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        """
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        self.conflicts = False
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        newline = '\n'
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        if len(self.a) > 0:
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            if self.a[0].endswith('\r\n'):
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                newline = '\r\n'
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            elif self.a[0].endswith('\r'):
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                newline = '\r'
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        if base_marker and reprocess:
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            raise CantReprocessAndShowBase
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        if name_a:
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            start_marker = start_marker + ' ' + name_a
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        if name_b:
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            end_marker = end_marker + ' ' + name_b
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        if name_base and base_marker:
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            base_marker = base_marker + ' ' + name_base
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        merge_regions = self.merge_regions()
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        if reprocess is True:
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            merge_regions = self.reprocess_merge_regions(merge_regions)
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        for t in merge_regions:
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            what = t[0]
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            if what == 'unchanged':
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                for i in range(t[1], t[2]):
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                    yield self.base[i]
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            elif what == 'a' or what == 'same':
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                for i in range(t[1], t[2]):
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                    yield self.a[i]
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            elif what == 'b':
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                for i in range(t[1], t[2]):
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                    yield self.b[i]
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            elif what == 'conflict':
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                self.conflicts = True
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                yield start_marker + newline
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                for i in range(t[3], t[4]):
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                    yield self.a[i]
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                if base_marker is not None:
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                    yield base_marker + newline
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                    for i in range(t[1], t[2]):
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                        yield self.base[i]
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parents:
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   127
                yield mid_marker + newline
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   128
                for i in range(t[5], t[6]):
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   129
                    yield self.b[i]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   130
                yield end_marker + newline
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parents:
diff changeset
   131
            else:
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parents:
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   132
                raise ValueError(what)
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parents: 4408
diff changeset
   133
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   134
    def merge_annotated(self):
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   135
        """Return merge with conflicts, showing origin of lines.
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   136
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        Most useful for debugging merge.
4362
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   138
        """
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   139
        for t in self.merge_regions():
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   140
            what = t[0]
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   141
            if what == 'unchanged':
465b9ea02868 Import 3-way merge code from bzr
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   142
                for i in range(t[1], t[2]):
465b9ea02868 Import 3-way merge code from bzr
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   143
                    yield 'u | ' + self.base[i]
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4cdaf1adafc8 backout most of 4f8067c94729
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parents: 12387
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   144
            elif what == 'a' or what == 'same':
4362
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diff changeset
   145
                for i in range(t[1], t[2]):
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   146
                    yield what[0] + ' | ' + self.a[i]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   147
            elif what == 'b':
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parents:
diff changeset
   148
                for i in range(t[1], t[2]):
465b9ea02868 Import 3-way merge code from bzr
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   149
                    yield 'b | ' + self.b[i]
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   150
            elif what == 'conflict':
465b9ea02868 Import 3-way merge code from bzr
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   151
                yield '<<<<\n'
465b9ea02868 Import 3-way merge code from bzr
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   152
                for i in range(t[3], t[4]):
465b9ea02868 Import 3-way merge code from bzr
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   153
                    yield 'A | ' + self.a[i]
465b9ea02868 Import 3-way merge code from bzr
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   154
                yield '----\n'
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   155
                for i in range(t[5], t[6]):
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   156
                    yield 'B | ' + self.b[i]
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   157
                yield '>>>>\n'
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parents:
diff changeset
   158
            else:
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   159
                raise ValueError(what)
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   160
4362
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   161
    def merge_groups(self):
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parents:
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   162
        """Yield sequence of line groups.  Each one is a tuple:
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   163
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   164
        'unchanged', lines
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   165
             Lines unchanged from base
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   166
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   167
        'a', lines
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   168
             Lines taken from a
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parents:
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   169
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   170
        'same', lines
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parents:
diff changeset
   171
             Lines taken from a (and equal to b)
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parents:
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   172
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   173
        'b', lines
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   174
             Lines taken from b
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parents:
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   175
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parents:
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   176
        'conflict', base_lines, a_lines, b_lines
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   177
             Lines from base were changed to either a or b and conflict.
465b9ea02868 Import 3-way merge code from bzr
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   178
        """
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parents:
diff changeset
   179
        for t in self.merge_regions():
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   180
            what = t[0]
465b9ea02868 Import 3-way merge code from bzr
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   181
            if what == 'unchanged':
465b9ea02868 Import 3-way merge code from bzr
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   182
                yield what, self.base[t[1]:t[2]]
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4cdaf1adafc8 backout most of 4f8067c94729
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parents: 12387
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   183
            elif what == 'a' or what == 'same':
4362
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parents:
diff changeset
   184
                yield what, self.a[t[1]:t[2]]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   185
            elif what == 'b':
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parents:
diff changeset
   186
                yield what, self.b[t[1]:t[2]]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   187
            elif what == 'conflict':
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   188
                yield (what,
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   189
                       self.base[t[1]:t[2]],
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   190
                       self.a[t[3]:t[4]],
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   191
                       self.b[t[5]:t[6]])
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   192
            else:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   193
                raise ValueError(what)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   194
465b9ea02868 Import 3-way merge code from bzr
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   195
    def merge_regions(self):
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   196
        """Return sequences of matching and conflicting regions.
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   197
465b9ea02868 Import 3-way merge code from bzr
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   198
        This returns tuples, where the first value says what kind we
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   199
        have:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   200
465b9ea02868 Import 3-way merge code from bzr
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   201
        'unchanged', start, end
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   202
             Take a region of base[start:end]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   203
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   204
        'same', astart, aend
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   205
             b and a are different from base but give the same result
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   206
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   207
        'a', start, end
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   208
             Non-clashing insertion from a[start:end]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   209
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   210
        Method is as follows:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   211
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   212
        The two sequences align only on regions which match the base
14549
48ec0763afbb check-code: catch misspellings of descendant
Matt Mackall <mpm@selenic.com>
parents: 14329
diff changeset
   213
        and both descendants.  These are found by doing a two-way diff
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   214
        of each one against the base, and then finding the
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   215
        intersections between those regions.  These "sync regions"
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   216
        are by definition unchanged in both and easily dealt with.
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   217
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   218
        The regions in between can be in any of three cases:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   219
        conflicted, or changed on only one side.
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   220
        """
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   221
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   222
        # section a[0:ia] has been disposed of, etc
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   223
        iz = ia = ib = 0
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4408
diff changeset
   224
16683
525fdb738975 cleanup: eradicate long lines
Brodie Rao <brodie@sf.io>
parents: 15782
diff changeset
   225
        for region in self.find_sync_regions():
525fdb738975 cleanup: eradicate long lines
Brodie Rao <brodie@sf.io>
parents: 15782
diff changeset
   226
            zmatch, zend, amatch, aend, bmatch, bend = region
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   227
            #print 'match base [%d:%d]' % (zmatch, zend)
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ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4408
diff changeset
   228
4362
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diff changeset
   229
            matchlen = zend - zmatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   230
            assert matchlen >= 0
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   231
            assert matchlen == (aend - amatch)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   232
            assert matchlen == (bend - bmatch)
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4408
diff changeset
   233
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   234
            len_a = amatch - ia
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   235
            len_b = bmatch - ib
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   236
            len_base = zmatch - iz
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   237
            assert len_a >= 0
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   238
            assert len_b >= 0
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   239
            assert len_base >= 0
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   240
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   241
            #print 'unmatched a=%d, b=%d' % (len_a, len_b)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   242
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   243
            if len_a or len_b:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   244
                # try to avoid actually slicing the lists
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   245
                equal_a = compare_range(self.a, ia, amatch,
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   246
                                        self.base, iz, zmatch)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   247
                equal_b = compare_range(self.b, ib, bmatch,
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   248
                                        self.base, iz, zmatch)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   249
                same = compare_range(self.a, ia, amatch,
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   250
                                     self.b, ib, bmatch)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   251
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   252
                if same:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   253
                    yield 'same', ia, amatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   254
                elif equal_a and not equal_b:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   255
                    yield 'b', ib, bmatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   256
                elif equal_b and not equal_a:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   257
                    yield 'a', ia, amatch
465b9ea02868 Import 3-way merge code from bzr
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   258
                elif not equal_a and not equal_b:
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parents:
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   259
                    yield 'conflict', iz, zmatch, ia, amatch, ib, bmatch
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   260
                else:
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parents:
diff changeset
   261
                    raise AssertionError("can't handle a=b=base but unmatched")
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parents:
diff changeset
   262
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parents:
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   263
                ia = amatch
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parents:
diff changeset
   264
                ib = bmatch
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   265
            iz = zmatch
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parents:
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   266
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parents:
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   267
            # if the same part of the base was deleted on both sides
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   268
            # that's OK, we can just skip it.
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   269
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ea7b982b6c08 Remove trailing spaces
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parents: 4408
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   270
4362
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   271
            if matchlen > 0:
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   272
                assert ia == amatch
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   273
                assert ib == bmatch
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parents:
diff changeset
   274
                assert iz == zmatch
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   275
4362
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                yield 'unchanged', zmatch, zend
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parents:
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   277
                iz = zend
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parents:
diff changeset
   278
                ia = aend
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   279
                ib = bend
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   280
4362
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   281
    def reprocess_merge_regions(self, merge_regions):
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parents:
diff changeset
   282
        """Where there are conflict regions, remove the agreed lines.
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   283
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   284
        Lines where both A and B have made the same changes are
4362
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   285
        eliminated.
465b9ea02868 Import 3-way merge code from bzr
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   286
        """
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   287
        for region in merge_regions:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   288
            if region[0] != "conflict":
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   289
                yield region
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parents:
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   290
                continue
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   291
            type, iz, zmatch, ia, amatch, ib, bmatch = region
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   292
            a_region = self.a[ia:amatch]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   293
            b_region = self.b[ib:bmatch]
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2e3c54fb79a3 actually port simplemerge to hg
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parents: 4362
diff changeset
   294
            matches = mdiff.get_matching_blocks(''.join(a_region),
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parents: 4362
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   295
                                                ''.join(b_region))
4362
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parents:
diff changeset
   296
            next_a = ia
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   297
            next_b = ib
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   298
            for region_ia, region_ib, region_len in matches[:-1]:
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diff changeset
   299
                region_ia += ia
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   300
                region_ib += ib
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   301
                reg = self.mismatch_region(next_a, region_ia, next_b,
465b9ea02868 Import 3-way merge code from bzr
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   302
                                           region_ib)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   303
                if reg is not None:
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   304
                    yield reg
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 8312
diff changeset
   305
                yield 'same', region_ia, region_len + region_ia
4362
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parents:
diff changeset
   306
                next_a = region_ia + region_len
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   307
                next_b = region_ib + region_len
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   308
            reg = self.mismatch_region(next_a, amatch, next_b, bmatch)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   309
            if reg is not None:
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   310
                yield reg
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   311
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   312
    def mismatch_region(next_a, region_ia,  next_b, region_ib):
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   313
        if next_a < region_ia or next_b < region_ib:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   314
            return 'conflict', None, None, next_a, region_ia, next_b, region_ib
4363
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parents: 4362
diff changeset
   315
    mismatch_region = staticmethod(mismatch_region)
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ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
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diff changeset
   316
4362
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parents:
diff changeset
   317
    def find_sync_regions(self):
14549
48ec0763afbb check-code: catch misspellings of descendant
Matt Mackall <mpm@selenic.com>
parents: 14329
diff changeset
   318
        """Return a list of sync regions, where both descendants match the base.
4362
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   319
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   320
        Generates a list of (base1, base2, a1, a2, b1, b2).  There is
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   321
        always a zero-length sync region at the end of all the files.
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   322
        """
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   323
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   324
        ia = ib = 0
4363
2e3c54fb79a3 actually port simplemerge to hg
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parents: 4362
diff changeset
   325
        amatches = mdiff.get_matching_blocks(self.basetext, self.atext)
2e3c54fb79a3 actually port simplemerge to hg
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parents: 4362
diff changeset
   326
        bmatches = mdiff.get_matching_blocks(self.basetext, self.btext)
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   327
        len_a = len(amatches)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   328
        len_b = len(bmatches)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   329
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   330
        sl = []
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   331
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   332
        while ia < len_a and ib < len_b:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   333
            abase, amatch, alen = amatches[ia]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   334
            bbase, bmatch, blen = bmatches[ib]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   335
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   336
            # there is an unconflicted block at i; how long does it
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   337
            # extend?  until whichever one ends earlier.
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 8312
diff changeset
   338
            i = intersect((abase, abase + alen), (bbase, bbase + blen))
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   339
            if i:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   340
                intbase = i[0]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   341
                intend = i[1]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   342
                intlen = intend - intbase
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   343
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   344
                # found a match of base[i[0], i[1]]; this may be less than
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   345
                # the region that matches in either one
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   346
                assert intlen <= alen
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   347
                assert intlen <= blen
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   348
                assert abase <= intbase
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   349
                assert bbase <= intbase
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   350
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   351
                asub = amatch + (intbase - abase)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   352
                bsub = bmatch + (intbase - bbase)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   353
                aend = asub + intlen
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   354
                bend = bsub + intlen
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   355
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   356
                assert self.base[intbase:intend] == self.a[asub:aend], \
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   357
                       (self.base[intbase:intend], self.a[asub:aend])
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   358
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   359
                assert self.base[intbase:intend] == self.b[bsub:bend]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   360
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   361
                sl.append((intbase, intend,
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   362
                           asub, aend,
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   363
                           bsub, bend))
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   364
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   365
            # advance whichever one ends first in the base text
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   366
            if (abase + alen) < (bbase + blen):
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   367
                ia += 1
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   368
            else:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   369
                ib += 1
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4408
diff changeset
   370
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   371
        intbase = len(self.base)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   372
        abase = len(self.a)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   373
        bbase = len(self.b)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   374
        sl.append((intbase, intbase, abase, abase, bbase, bbase))
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   375
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   376
        return sl
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   377
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   378
    def find_unconflicted(self):
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   379
        """Return a list of ranges in base that are not conflicted."""
4363
2e3c54fb79a3 actually port simplemerge to hg
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4362
diff changeset
   380
        am = mdiff.get_matching_blocks(self.basetext, self.atext)
2e3c54fb79a3 actually port simplemerge to hg
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4362
diff changeset
   381
        bm = mdiff.get_matching_blocks(self.basetext, self.btext)
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   382
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   383
        unc = []
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   384
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   385
        while am and bm:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   386
            # there is an unconflicted block at i; how long does it
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   387
            # extend?  until whichever one ends earlier.
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   388
            a1 = am[0][0]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   389
            a2 = a1 + am[0][2]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   390
            b1 = bm[0][0]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   391
            b2 = b1 + bm[0][2]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   392
            i = intersect((a1, a2), (b1, b2))
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   393
            if i:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   394
                unc.append(i)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   395
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   396
            if a2 < b2:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   397
                del am[0]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   398
            else:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   399
                del bm[0]
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4408
diff changeset
   400
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   401
        return unc
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   402
8269
bb9f13974d8e simplemerge: use ui.warn() for warnings
Steve Borho <steve@borho.org>
parents: 7280
diff changeset
   403
def simplemerge(ui, local, base, other, **opts):
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   404
    def readfile(filename):
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   405
        f = open(filename, "rb")
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   406
        text = f.read()
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   407
        f.close()
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   408
        if util.binary(text):
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   409
            msg = _("%s looks like a binary file.") % filename
14328
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   410
            if not opts.get('quiet'):
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   411
                ui.warn(_('warning: %s\n') % msg)
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   412
            if not opts.get('text'):
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   413
                raise util.Abort(msg)
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   414
        return text
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   415
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   416
    name_a = local
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   417
    name_b = other
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   418
    labels = opts.get('label', [])
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   419
    if labels:
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   420
        name_a = labels.pop(0)
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   421
    if labels:
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   422
        name_b = labels.pop(0)
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   423
    if labels:
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   424
        raise util.Abort(_("can only specify two labels."))
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   425
14328
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   426
    try:
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   427
        localtext = readfile(local)
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   428
        basetext = readfile(base)
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   429
        othertext = readfile(other)
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   430
    except util.Abort:
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   431
        return 1
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   432
15381
c519cd8f0169 backout dbdb777502dc (issue3077) (issue3071)
Matt Mackall <mpm@selenic.com>
parents: 15355
diff changeset
   433
    local = os.path.realpath(local)
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   434
    if not opts.get('print'):
13970
d13913355390 move opener from util to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents: 12401
diff changeset
   435
        opener = scmutil.opener(os.path.dirname(local))
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   436
        out = opener(os.path.basename(local), "w", atomictemp=True)
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   437
    else:
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   438
        out = sys.stdout
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   439
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   440
    reprocess = not opts.get('no_minimal')
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   441
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   442
    m3 = Merge3Text(basetext, localtext, othertext)
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   443
    for line in m3.merge_lines(name_a=name_a, name_b=name_b,
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   444
                               reprocess=reprocess):
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   445
        out.write(line)
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   446
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   447
    if not opts.get('print'):
15057
774da7121fc9 atomictempfile: make close() consistent with other file-like objects.
Greg Ward <greg@gerg.ca>
parents: 14549
diff changeset
   448
        out.close()
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   449
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   450
    if m3.conflicts:
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   451
        if not opts.get('quiet'):
8269
bb9f13974d8e simplemerge: use ui.warn() for warnings
Steve Borho <steve@borho.org>
parents: 7280
diff changeset
   452
            ui.warn(_("warning: conflicts during merge.\n"))
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   453
        return 1