mercurial/simplemerge.py
author Augie Fackler <augie@google.com>
Sun, 18 Feb 2018 14:25:03 -0500
changeset 36310 ea62c2df882d
parent 35368 93c4958d987c
child 37084 f0b6fbea00cf
permissions -rw-r--r--
largefiles: make scheme regex a bytes regex # skip-blame just a b prefix Differential Revision: https://phab.mercurial-scm.org/D2338
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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 __future__ import absolute_import
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from .i18n import _
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from . import (
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    error,
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    mdiff,
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    pycompat,
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    util,
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)
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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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                    localorother=None,
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                    minimize=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 name_a and start_marker:
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            start_marker = start_marker + ' ' + name_a
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        if name_b and end_marker:
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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 minimize:
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            merge_regions = self.minimize(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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                if localorother == 'local':
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                    for i in range(t[3], t[4]):
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                        yield self.a[i]
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                elif localorother == 'other':
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   128
                    for i in range(t[5], t[6]):
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   129
                        yield self.b[i]
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   130
                else:
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   131
                    self.conflicts = True
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                    if start_marker is not None:
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   133
                        yield start_marker + newline
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   134
                    for i in range(t[3], t[4]):
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   135
                        yield self.a[i]
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   136
                    if base_marker is not None:
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   137
                        yield base_marker + newline
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   138
                        for i in range(t[1], t[2]):
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                            yield self.base[i]
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                    if mid_marker is not None:
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                        yield mid_marker + newline
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   142
                    for i in range(t[5], t[6]):
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   143
                        yield self.b[i]
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   144
                    if end_marker is not None:
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   145
                        yield end_marker + newline
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            else:
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                raise ValueError(what)
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    def merge_groups(self):
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        """Yield sequence of line groups.  Each one is a tuple:
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   151
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        'unchanged', lines
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             Lines unchanged from base
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   154
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   155
        'a', lines
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             Lines taken from a
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   157
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   158
        'same', lines
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   159
             Lines taken from a (and equal to b)
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   160
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   161
        'b', lines
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             Lines taken from b
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   163
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   164
        'conflict', base_lines, a_lines, b_lines
465b9ea02868 Import 3-way merge code from bzr
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   165
             Lines from base were changed to either a or b and conflict.
465b9ea02868 Import 3-way merge code from bzr
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        """
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   167
        for t in self.merge_regions():
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   168
            what = t[0]
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   169
            if what == 'unchanged':
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   170
                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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   171
            elif what == 'a' or what == 'same':
4362
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                yield what, self.a[t[1]:t[2]]
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   173
            elif what == 'b':
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   174
                yield what, self.b[t[1]:t[2]]
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   175
            elif what == 'conflict':
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   176
                yield (what,
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                       self.base[t[1]:t[2]],
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                       self.a[t[3]:t[4]],
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                       self.b[t[5]:t[6]])
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   180
            else:
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   181
                raise ValueError(what)
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   182
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   183
    def merge_regions(self):
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   184
        """Return sequences of matching and conflicting regions.
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   185
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        This returns tuples, where the first value says what kind we
465b9ea02868 Import 3-way merge code from bzr
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   187
        have:
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   188
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   189
        'unchanged', start, end
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   190
             Take a region of base[start:end]
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parents:
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   191
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        'same', astart, aend
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   193
             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:
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   194
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   195
        'a', start, end
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             Non-clashing insertion from a[start:end]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   197
28070
a504794cee29 merge: add some useful documentation
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parents: 26614
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   198
        'conflict', zstart, zend, astart, aend, bstart, bend
a504794cee29 merge: add some useful documentation
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   199
            Conflict between a and b, with z as common ancestor
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   200
4362
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   201
        Method is as follows:
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   202
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   203
        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
   204
        and both descendants.  These are found by doing a two-way diff
4362
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   205
        of each one against the base, and then finding the
465b9ea02868 Import 3-way merge code from bzr
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   206
        intersections between those regions.  These "sync regions"
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   207
        are by definition unchanged in both and easily dealt with.
465b9ea02868 Import 3-way merge code from bzr
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   208
465b9ea02868 Import 3-way merge code from bzr
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   209
        The regions in between can be in any of three cases:
465b9ea02868 Import 3-way merge code from bzr
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   210
        conflicted, or changed on only one side.
465b9ea02868 Import 3-way merge code from bzr
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   211
        """
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   212
465b9ea02868 Import 3-way merge code from bzr
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   213
        # section a[0:ia] has been disposed of, etc
465b9ea02868 Import 3-way merge code from bzr
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   214
        iz = ia = ib = 0
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ea7b982b6c08 Remove trailing spaces
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parents: 4408
diff changeset
   215
16683
525fdb738975 cleanup: eradicate long lines
Brodie Rao <brodie@sf.io>
parents: 15782
diff changeset
   216
        for region in self.find_sync_regions():
525fdb738975 cleanup: eradicate long lines
Brodie Rao <brodie@sf.io>
parents: 15782
diff changeset
   217
            zmatch, zend, amatch, aend, bmatch, bend = region
4362
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   218
            #print 'match base [%d:%d]' % (zmatch, zend)
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ea7b982b6c08 Remove trailing spaces
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parents: 4408
diff changeset
   219
4362
465b9ea02868 Import 3-way merge code from bzr
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   220
            matchlen = zend - zmatch
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   221
            assert matchlen >= 0
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   222
            assert matchlen == (aend - amatch)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   223
            assert matchlen == (bend - bmatch)
5081
ea7b982b6c08 Remove trailing spaces
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parents: 4408
diff changeset
   224
4362
465b9ea02868 Import 3-way merge code from bzr
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   225
            len_a = amatch - ia
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   226
            len_b = bmatch - ib
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   227
            len_base = zmatch - iz
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   228
            assert len_a >= 0
465b9ea02868 Import 3-way merge code from bzr
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   229
            assert len_b >= 0
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   230
            assert len_base >= 0
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   231
465b9ea02868 Import 3-way merge code from bzr
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   232
            #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
   233
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   234
            if len_a or len_b:
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   235
                # 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
   236
                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
   237
                                        self.base, iz, zmatch)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   238
                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
   239
                                        self.base, iz, zmatch)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   240
                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
   241
                                     self.b, ib, bmatch)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   242
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   243
                if same:
465b9ea02868 Import 3-way merge code from bzr
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parents:
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   244
                    yield 'same', ia, amatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   245
                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
   246
                    yield 'b', ib, bmatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   247
                elif equal_b and not equal_a:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   248
                    yield 'a', ia, amatch
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   249
                elif not 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
   250
                    yield 'conflict', iz, zmatch, ia, amatch, ib, bmatch
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   251
                else:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   252
                    raise AssertionError("can't handle a=b=base but unmatched")
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   253
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   254
                ia = amatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   255
                ib = bmatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   256
            iz = zmatch
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   257
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            # if the same part of the base was deleted on both sides
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            # that's OK, we can just skip it.
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            if matchlen > 0:
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                assert ia == amatch
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                assert ib == bmatch
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                assert iz == zmatch
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   266
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                yield 'unchanged', zmatch, zend
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                iz = zend
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                ia = aend
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                ib = bend
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    def minimize(self, merge_regions):
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        """Trim conflict regions of lines where A and B sides match.
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        Lines where both A and B have made the same changes at the beginning
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        or the end of each merge region are eliminated from the conflict
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        region and are instead considered the same.
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        """
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   279
        for region in merge_regions:
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            if region[0] != "conflict":
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                yield region
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                continue
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            issue, z1, z2, a1, a2, b1, b2 = region
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            alen = a2 - a1
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            blen = b2 - b1
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   286
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            # find matches at the front
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   288
            ii = 0
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   289
            while ii < alen and ii < blen and \
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                  self.a[a1 + ii] == self.b[b1 + ii]:
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   291
                ii += 1
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   292
            startmatches = ii
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   293
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            # find matches at the end
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   295
            ii = 0
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   296
            while ii < alen and ii < blen and \
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   297
                  self.a[a2 - ii - 1] == self.b[b2 - ii - 1]:
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   298
                ii += 1
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   299
            endmatches = ii
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   300
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   301
            if startmatches > 0:
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   302
                yield 'same', a1, a1 + startmatches
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   303
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   304
            yield ('conflict', z1, z2,
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   305
                    a1 + startmatches, a2 - endmatches,
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   306
                    b1 + startmatches, b2 - endmatches)
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   307
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   308
            if endmatches > 0:
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   309
                yield 'same', a2 - endmatches, a2
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    def find_sync_regions(self):
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        """Return a list of sync regions, where both descendants match the base.
4362
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        Generates a list of (base1, base2, a1, a2, b1, b2).  There is
465b9ea02868 Import 3-way merge code from bzr
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   315
        always a zero-length sync region at the end of all the files.
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   316
        """
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   317
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   318
        ia = ib = 0
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parents: 4362
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   319
        amatches = mdiff.get_matching_blocks(self.basetext, self.atext)
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   320
        bmatches = mdiff.get_matching_blocks(self.basetext, self.btext)
4362
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   321
        len_a = len(amatches)
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   322
        len_b = len(bmatches)
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   323
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   324
        sl = []
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diff changeset
   325
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   326
        while ia < len_a and ib < len_b:
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   327
            abase, amatch, alen = amatches[ia]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   328
            bbase, bmatch, blen = bmatches[ib]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   329
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diff changeset
   330
            # there is an unconflicted block at i; how long does it
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   331
            # extend?  until whichever one ends earlier.
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 8312
diff changeset
   332
            i = intersect((abase, abase + alen), (bbase, bbase + blen))
4362
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parents:
diff changeset
   333
            if i:
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   334
                intbase = i[0]
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   335
                intend = i[1]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   336
                intlen = intend - intbase
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   337
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   338
                # found a match of base[i[0], i[1]]; this may be less than
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   339
                # the region that matches in either one
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   340
                assert intlen <= alen
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   341
                assert intlen <= blen
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   342
                assert abase <= intbase
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   343
                assert bbase <= intbase
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parents:
diff changeset
   344
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   345
                asub = amatch + (intbase - abase)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   346
                bsub = bmatch + (intbase - bbase)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   347
                aend = asub + intlen
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   348
                bend = bsub + intlen
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   349
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   350
                assert self.base[intbase:intend] == self.a[asub:aend], \
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   351
                       (self.base[intbase:intend], self.a[asub:aend])
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   352
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   353
                assert self.base[intbase:intend] == self.b[bsub:bend]
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   354
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   355
                sl.append((intbase, intend,
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   356
                           asub, aend,
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   357
                           bsub, bend))
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   358
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   359
            # advance whichever one ends first in the base text
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   360
            if (abase + alen) < (bbase + blen):
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   361
                ia += 1
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   362
            else:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   363
                ib += 1
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4408
diff changeset
   364
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   365
        intbase = len(self.base)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   366
        abase = len(self.a)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   367
        bbase = len(self.b)
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   368
        sl.append((intbase, intbase, abase, abase, bbase, bbase))
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   369
465b9ea02868 Import 3-way merge code from bzr
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diff changeset
   370
        return sl
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   371
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   372
    def find_unconflicted(self):
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   373
        """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
   374
        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
   375
        bm = mdiff.get_matching_blocks(self.basetext, self.btext)
4362
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   376
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   377
        unc = []
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   378
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   379
        while am and bm:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   380
            # there is an unconflicted block at i; how long does it
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   381
            # extend?  until whichever one ends earlier.
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   382
            a1 = am[0][0]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   383
            a2 = a1 + am[0][2]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   384
            b1 = bm[0][0]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   385
            b2 = b1 + bm[0][2]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   386
            i = intersect((a1, a2), (b1, b2))
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   387
            if i:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   388
                unc.append(i)
465b9ea02868 Import 3-way merge code from bzr
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parents:
diff changeset
   389
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   390
            if a2 < b2:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   391
                del am[0]
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   392
            else:
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   393
                del bm[0]
5081
ea7b982b6c08 Remove trailing spaces
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4408
diff changeset
   394
4362
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   395
        return unc
465b9ea02868 Import 3-way merge code from bzr
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
diff changeset
   396
33825
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   397
def _verifytext(text, path, ui, opts):
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   398
    """verifies that text is non-binary (unless opts[text] is passed,
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   399
    then we just warn)"""
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   400
    if util.binary(text):
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   401
        msg = _("%s looks like a binary file.") % path
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   402
        if not opts.get('quiet'):
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   403
            ui.warn(_('warning: %s\n') % msg)
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   404
        if not opts.get('text'):
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   405
            raise error.Abort(msg)
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   406
    return text
de573184686e simplemerge: extract verifytext as a helper function
Phil Cohen <phillco@fb.com>
parents: 33017
diff changeset
   407
33830
aa6c290a77fa filemerge: extract `_picklabels` as a helper function
Phil Cohen <phillco@fb.com>
parents: 33829
diff changeset
   408
def _picklabels(defaults, overrides):
aa6c290a77fa filemerge: extract `_picklabels` as a helper function
Phil Cohen <phillco@fb.com>
parents: 33829
diff changeset
   409
    if len(overrides) > 3:
aa6c290a77fa filemerge: extract `_picklabels` as a helper function
Phil Cohen <phillco@fb.com>
parents: 33829
diff changeset
   410
        raise error.Abort(_("can only specify three labels."))
33933
39d253d088a9 simplemerge: refactor _picklabels to be more compact
Phil Cohen <phillco@fb.com>
parents: 33932
diff changeset
   411
    result = defaults[:]
39d253d088a9 simplemerge: refactor _picklabels to be more compact
Phil Cohen <phillco@fb.com>
parents: 33932
diff changeset
   412
    for i, override in enumerate(overrides):
39d253d088a9 simplemerge: refactor _picklabels to be more compact
Phil Cohen <phillco@fb.com>
parents: 33932
diff changeset
   413
        result[i] = override
39d253d088a9 simplemerge: refactor _picklabels to be more compact
Phil Cohen <phillco@fb.com>
parents: 33932
diff changeset
   414
    return result
33830
aa6c290a77fa filemerge: extract `_picklabels` as a helper function
Phil Cohen <phillco@fb.com>
parents: 33829
diff changeset
   415
34049
6330df9d6393 simplemerge: remove unused `repo` parameter
Phil Cohen <phillco@fb.com>
parents: 33933
diff changeset
   416
def simplemerge(ui, localctx, basectx, otherctx, **opts):
33828
8b91a4ff23ad simplemerge: use contexts to read file data from, if passed
Phil Cohen <phillco@fb.com>
parents: 33826
diff changeset
   417
    """Performs the simplemerge algorithm.
8b91a4ff23ad simplemerge: use contexts to read file data from, if passed
Phil Cohen <phillco@fb.com>
parents: 33826
diff changeset
   418
33907
1ad3085239ad simplemerge: make context parameters non-optional
Phil Cohen <phillco@fb.com>
parents: 33906
diff changeset
   419
    The merged result is written into `localctx`.
33905
61b267a99fea simplemerge: stop reading from, and writing to, files
Phil Cohen <phillco@fb.com>
parents: 33904
diff changeset
   420
    """
35368
93c4958d987c py3: handle keyword arguments correctly in simplemerge.py
Pulkit Goyal <7895pulkit@gmail.com>
parents: 34049
diff changeset
   421
    opts = pycompat.byteskwargs(opts)
93c4958d987c py3: handle keyword arguments correctly in simplemerge.py
Pulkit Goyal <7895pulkit@gmail.com>
parents: 34049
diff changeset
   422
33828
8b91a4ff23ad simplemerge: use contexts to read file data from, if passed
Phil Cohen <phillco@fb.com>
parents: 33826
diff changeset
   423
    def readctx(ctx):
33902
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   424
        # Merges were always run in the working copy before, which means
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   425
        # they used decoded data, if the user defined any repository
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   426
        # filters.
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   427
        #
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   428
        # Maintain that behavior today for BC, though perhaps in the future
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   429
        # it'd be worth considering whether merging encoded data (what the
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   430
        # repository usually sees) might be more useful.
f39ba8237ed6 simplemerge: use `ctx.decoddeddata()` instead of `repo.wreaddata`
Phil Cohen <phillco@fb.com>
parents: 33830
diff changeset
   431
        return _verifytext(ctx.decodeddata(), ctx.path(), ui, opts)
33828
8b91a4ff23ad simplemerge: use contexts to read file data from, if passed
Phil Cohen <phillco@fb.com>
parents: 33826
diff changeset
   432
26069
09d6725cbc60 simplemerge: add 'mode' kwarg which - when 'union' - suppresses markers
Erik Huelsmann <ehuels@gmail.com>
parents: 25974
diff changeset
   433
    mode = opts.get('mode','merge')
33830
aa6c290a77fa filemerge: extract `_picklabels` as a helper function
Phil Cohen <phillco@fb.com>
parents: 33829
diff changeset
   434
    name_a, name_b, name_base = None, None, None
aa6c290a77fa filemerge: extract `_picklabels` as a helper function
Phil Cohen <phillco@fb.com>
parents: 33829
diff changeset
   435
    if mode != 'union':
33904
1915a5e809ca simplemerge: use context paths for default labels instead of file paths
Phil Cohen <phillco@fb.com>
parents: 33902
diff changeset
   436
        name_a, name_b, name_base = _picklabels([localctx.path(),
1915a5e809ca simplemerge: use context paths for default labels instead of file paths
Phil Cohen <phillco@fb.com>
parents: 33902
diff changeset
   437
                                                 otherctx.path(), None],
33830
aa6c290a77fa filemerge: extract `_picklabels` as a helper function
Phil Cohen <phillco@fb.com>
parents: 33829
diff changeset
   438
                                                opts.get('label', []))
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   439
14328
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   440
    try:
33905
61b267a99fea simplemerge: stop reading from, and writing to, files
Phil Cohen <phillco@fb.com>
parents: 33904
diff changeset
   441
        localtext = readctx(localctx)
61b267a99fea simplemerge: stop reading from, and writing to, files
Phil Cohen <phillco@fb.com>
parents: 33904
diff changeset
   442
        basetext = readctx(basectx)
61b267a99fea simplemerge: stop reading from, and writing to, files
Phil Cohen <phillco@fb.com>
parents: 33904
diff changeset
   443
        othertext = readctx(otherctx)
26587
56b2bcea2529 error: get Abort from 'error' instead of 'util'
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 26223
diff changeset
   444
    except error.Abort:
14328
3c65cdcf3ba6 simplemerge: do not allow binary files to abort an entire merge
Steve Borho <steve@borho.org>
parents: 12401
diff changeset
   445
        return 1
4364
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
    m3 = Merge3Text(basetext, localtext, othertext)
28072
c3e9269d9602 merge: minimize conflicts when common base is not shown (issue4447)
Ryan McElroy <rmcelroy@fb.com>
parents: 28071
diff changeset
   448
    extrakwargs = {
c3e9269d9602 merge: minimize conflicts when common base is not shown (issue4447)
Ryan McElroy <rmcelroy@fb.com>
parents: 28071
diff changeset
   449
            "localorother": opts.get("localorother", None),
c3e9269d9602 merge: minimize conflicts when common base is not shown (issue4447)
Ryan McElroy <rmcelroy@fb.com>
parents: 28071
diff changeset
   450
            'minimize': True,
c3e9269d9602 merge: minimize conflicts when common base is not shown (issue4447)
Ryan McElroy <rmcelroy@fb.com>
parents: 28071
diff changeset
   451
        }
26069
09d6725cbc60 simplemerge: add 'mode' kwarg which - when 'union' - suppresses markers
Erik Huelsmann <ehuels@gmail.com>
parents: 25974
diff changeset
   452
    if mode == 'union':
09d6725cbc60 simplemerge: add 'mode' kwarg which - when 'union' - suppresses markers
Erik Huelsmann <ehuels@gmail.com>
parents: 25974
diff changeset
   453
        extrakwargs['start_marker'] = None
09d6725cbc60 simplemerge: add 'mode' kwarg which - when 'union' - suppresses markers
Erik Huelsmann <ehuels@gmail.com>
parents: 25974
diff changeset
   454
        extrakwargs['mid_marker'] = None
09d6725cbc60 simplemerge: add 'mode' kwarg which - when 'union' - suppresses markers
Erik Huelsmann <ehuels@gmail.com>
parents: 25974
diff changeset
   455
        extrakwargs['end_marker'] = None
09d6725cbc60 simplemerge: add 'mode' kwarg which - when 'union' - suppresses markers
Erik Huelsmann <ehuels@gmail.com>
parents: 25974
diff changeset
   456
    elif name_base is not None:
22024
372ae2745acf simplemerge: support three labels when merging
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22023
diff changeset
   457
        extrakwargs['base_marker'] = '|||||||'
372ae2745acf simplemerge: support three labels when merging
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22023
diff changeset
   458
        extrakwargs['name_base'] = name_base
28072
c3e9269d9602 merge: minimize conflicts when common base is not shown (issue4447)
Ryan McElroy <rmcelroy@fb.com>
parents: 28071
diff changeset
   459
        extrakwargs['minimize'] = False
33908
4074de97b512 simplemerge: simplify code now that we always write to a context
Phil Cohen <phillco@fb.com>
parents: 33907
diff changeset
   460
4074de97b512 simplemerge: simplify code now that we always write to a context
Phil Cohen <phillco@fb.com>
parents: 33907
diff changeset
   461
    mergedtext = ""
33017
c31d45623304 py3: convert kwargs' keys' to str using pycompat.strkwargs()
Pulkit Goyal <7895pulkit@gmail.com>
parents: 31238
diff changeset
   462
    for line in m3.merge_lines(name_a=name_a, name_b=name_b,
c31d45623304 py3: convert kwargs' keys' to str using pycompat.strkwargs()
Pulkit Goyal <7895pulkit@gmail.com>
parents: 31238
diff changeset
   463
                               **pycompat.strkwargs(extrakwargs)):
33908
4074de97b512 simplemerge: simplify code now that we always write to a context
Phil Cohen <phillco@fb.com>
parents: 33907
diff changeset
   464
        if opts.get('print'):
4074de97b512 simplemerge: simplify code now that we always write to a context
Phil Cohen <phillco@fb.com>
parents: 33907
diff changeset
   465
            ui.fout.write(line)
4074de97b512 simplemerge: simplify code now that we always write to a context
Phil Cohen <phillco@fb.com>
parents: 33907
diff changeset
   466
        else:
4074de97b512 simplemerge: simplify code now that we always write to a context
Phil Cohen <phillco@fb.com>
parents: 33907
diff changeset
   467
            mergedtext += line
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   468
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   469
    if not opts.get('print'):
33908
4074de97b512 simplemerge: simplify code now that we always write to a context
Phil Cohen <phillco@fb.com>
parents: 33907
diff changeset
   470
        localctx.write(mergedtext, localctx.flags())
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   471
26069
09d6725cbc60 simplemerge: add 'mode' kwarg which - when 'union' - suppresses markers
Erik Huelsmann <ehuels@gmail.com>
parents: 25974
diff changeset
   472
    if m3.conflicts and not mode == 'union':
4364
d5c3a70f8422 polish the simplemerge command; add a test
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4363
diff changeset
   473
        return 1