mercurial/mdiff.py
author Augie Fackler <augie@google.com>
Sun, 18 Feb 2018 14:25:03 -0500
changeset 36310 ea62c2df882d
parent 36146 29dd37a418aa
child 36414 44c4a38bf563
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
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# mdiff.py - diff and patch routines for mercurial
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#
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# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import re
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import struct
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import zlib
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from .i18n import _
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from . import (
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    error,
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    policy,
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    pycompat,
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    util,
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)
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_missing_newline_marker = "\\ No newline at end of file\n"
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bdiff = policy.importmod(r'bdiff')
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mpatch = policy.importmod(r'mpatch')
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blocks = bdiff.blocks
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fixws = bdiff.fixws
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patches = mpatch.patches
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patchedsize = mpatch.patchedsize
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textdiff = bdiff.bdiff
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splitnewlines = bdiff.splitnewlines
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class diffopts(object):
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    '''context is the number of context lines
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    text treats all files as text
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    showfunc enables diff -p output
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    git enables the git extended patch format
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    nodates removes dates from diff headers
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    nobinary ignores binary files
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    noprefix disables the 'a/' and 'b/' prefixes (ignored in plain mode)
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    ignorews ignores all whitespace changes in the diff
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    ignorewsamount ignores changes in the amount of whitespace
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    ignoreblanklines ignores changes whose lines are all blank
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    upgrade generates git diffs to avoid data loss
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    '''
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    defaults = {
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        'context': 3,
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        'text': False,
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        'showfunc': False,
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        'git': False,
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        'nodates': False,
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        'nobinary': False,
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        'noprefix': False,
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        'index': 0,
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        'ignorews': False,
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        'ignorewsamount': False,
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        'ignorewseol': False,
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        'ignoreblanklines': False,
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        'upgrade': False,
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        'showsimilarity': False,
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        'worddiff': False,
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        }
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    def __init__(self, **opts):
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        opts = pycompat.byteskwargs(opts)
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        for k in self.defaults.keys():
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            v = opts.get(k)
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            if v is None:
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                v = self.defaults[k]
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            setattr(self, k, v)
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        try:
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            self.context = int(self.context)
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        except ValueError:
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            raise error.Abort(_('diff context lines count must be '
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                               'an integer, not %r') % self.context)
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    def copy(self, **kwargs):
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        opts = dict((k, getattr(self, k)) for k in self.defaults)
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        opts = pycompat.strkwargs(opts)
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        opts.update(kwargs)
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        return diffopts(**opts)
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defaultopts = diffopts()
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def wsclean(opts, text, blank=True):
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    if opts.ignorews:
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        text = bdiff.fixws(text, 1)
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    elif opts.ignorewsamount:
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        text = bdiff.fixws(text, 0)
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    if blank and opts.ignoreblanklines:
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        text = re.sub('\n+', '\n', text).strip('\n')
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    if opts.ignorewseol:
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        text = re.sub(br'[ \t\r\f]+\n', r'\n', text)
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    return text
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def splitblock(base1, lines1, base2, lines2, opts):
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    # The input lines matches except for interwoven blank lines. We
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    # transform it into a sequence of matching blocks and blank blocks.
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    lines1 = [(wsclean(opts, l) and 1 or 0) for l in lines1]
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    lines2 = [(wsclean(opts, l) and 1 or 0) for l in lines2]
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    s1, e1 = 0, len(lines1)
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    s2, e2 = 0, len(lines2)
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    while s1 < e1 or s2 < e2:
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        i1, i2, btype = s1, s2, '='
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        if (i1 >= e1 or lines1[i1] == 0
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            or i2 >= e2 or lines2[i2] == 0):
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            # Consume the block of blank lines
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            btype = '~'
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            while i1 < e1 and lines1[i1] == 0:
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                i1 += 1
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            while i2 < e2 and lines2[i2] == 0:
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                i2 += 1
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        else:
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            # Consume the matching lines
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            while i1 < e1 and lines1[i1] == 1 and lines2[i2] == 1:
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                i1 += 1
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                i2 += 1
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        yield [base1 + s1, base1 + i1, base2 + s2, base2 + i2], btype
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        s1 = i1
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        s2 = i2
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def hunkinrange(hunk, linerange):
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    """Return True if `hunk` defined as (start, length) is in `linerange`
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    defined as (lowerbound, upperbound).
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   128
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    >>> hunkinrange((5, 10), (2, 7))
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    True
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    >>> hunkinrange((5, 10), (6, 12))
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    True
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    >>> hunkinrange((5, 10), (13, 17))
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    True
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    >>> hunkinrange((5, 10), (3, 17))
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    True
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    >>> hunkinrange((5, 10), (1, 3))
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    False
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    >>> hunkinrange((5, 10), (18, 20))
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    False
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    >>> hunkinrange((5, 10), (1, 5))
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    False
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    >>> hunkinrange((5, 10), (15, 27))
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    False
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   145
    """
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    start, length = hunk
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    lowerbound, upperbound = linerange
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   148
    return lowerbound < start + length and start < upperbound
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def blocksinrange(blocks, rangeb):
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    """filter `blocks` like (a1, a2, b1, b2) from items outside line range
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    `rangeb` from ``(b1, b2)`` point of view.
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   154
    Return `filteredblocks, rangea` where:
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   155
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    * `filteredblocks` is list of ``block = (a1, a2, b1, b2), stype`` items of
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      `blocks` that are inside `rangeb` from ``(b1, b2)`` point of view; a
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      block ``(b1, b2)`` being inside `rangeb` if
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      ``rangeb[0] < b2 and b1 < rangeb[1]``;
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    * `rangea` is the line range w.r.t. to ``(a1, a2)`` parts of `blocks`.
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   161
    """
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   162
    lbb, ubb = rangeb
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   163
    lba, uba = None, None
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   164
    filteredblocks = []
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    for block in blocks:
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        (a1, a2, b1, b2), stype = block
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        if lbb >= b1 and ubb <= b2 and stype == '=':
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            # rangeb is within a single "=" hunk, restrict back linerange1
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            # by offsetting rangeb
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            lba = lbb - b1 + a1
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            uba = ubb - b1 + a1
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   172
        else:
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            if b1 <= lbb < b2:
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   174
                if stype == '=':
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                    lba = a2 - (b2 - lbb)
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   176
                else:
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   177
                    lba = a1
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            if b1 < ubb <= b2:
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                if stype == '=':
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                    uba = a1 + (ubb - b1)
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   181
                else:
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                    uba = a2
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   183
        if hunkinrange((b1, (b2 - b1)), rangeb):
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   184
            filteredblocks.append(block)
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   185
    if lba is None or uba is None or uba < lba:
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   186
        raise error.Abort(_('line range exceeds file size'))
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   187
    return filteredblocks, (lba, uba)
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   188
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   189
def allblocks(text1, text2, opts=None, lines1=None, lines2=None):
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   190
    """Return (block, type) tuples, where block is an mdiff.blocks
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   191
    line entry. type is '=' for blocks matching exactly one another
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   192
    (bdiff blocks), '!' for non-matching blocks and '~' for blocks
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   193
    matching only after having filtered blank lines.
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   194
    line1 and line2 are text1 and text2 split with splitnewlines() if
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   195
    they are already available.
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   196
    """
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   197
    if opts is None:
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   198
        opts = defaultopts
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   199
    if opts.ignorews or opts.ignorewsamount or opts.ignorewseol:
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        text1 = wsclean(opts, text1, False)
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        text2 = wsclean(opts, text2, False)
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   202
    diff = bdiff.blocks(text1, text2)
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   203
    for i, s1 in enumerate(diff):
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   204
        # The first match is special.
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        # we've either found a match starting at line 0 or a match later
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   206
        # in the file.  If it starts later, old and new below will both be
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   207
        # empty and we'll continue to the next match.
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   208
        if i > 0:
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   209
            s = diff[i - 1]
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   210
        else:
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   211
            s = [0, 0, 0, 0]
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   212
        s = [s[1], s1[0], s[3], s1[2]]
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   213
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   214
        # bdiff sometimes gives huge matches past eof, this check eats them,
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   215
        # and deals with the special first match case described above
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   216
        if s[0] != s[1] or s[2] != s[3]:
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   217
            type = '!'
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   218
            if opts.ignoreblanklines:
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   219
                if lines1 is None:
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   220
                    lines1 = splitnewlines(text1)
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   221
                if lines2 is None:
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   222
                    lines2 = splitnewlines(text2)
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   223
                old = wsclean(opts, "".join(lines1[s[0]:s[1]]))
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   224
                new = wsclean(opts, "".join(lines2[s[2]:s[3]]))
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   225
                if old == new:
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   226
                    type = '~'
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   227
            yield s, type
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   228
        yield s1, '='
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   229
35951
8b6dd3922f70 patch: unify check_binary and binary flags
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diff changeset
   230
def unidiff(a, ad, b, bd, fn1, fn2, binary, opts=defaultopts):
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   231
    """Return a unified diff as a (headers, hunks) tuple.
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   232
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   233
    If the diff is not null, `headers` is a list with unified diff header
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   234
    lines "--- <original>" and "+++ <new>" and `hunks` is a generator yielding
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   235
    (hunkrange, hunklines) coming from _unidiff().
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diff changeset
   236
    Otherwise, `headers` and `hunks` are empty.
35850
079b27b5a869 patch: avoid repeated binary checks if all files in a patch are text
Joerg Sonnenberger <joerg@bec.de>
parents: 35584
diff changeset
   237
35951
8b6dd3922f70 patch: unify check_binary and binary flags
Yuya Nishihara <yuya@tcha.org>
parents: 35943
diff changeset
   238
    Set binary=True if either a or b should be taken as a binary file.
31271
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parents: 31269
diff changeset
   239
    """
16362
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parents: 16089
diff changeset
   240
    def datetag(date, fn=None):
4679
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
   241
        if not opts.git and not opts.nodates:
31271
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diff changeset
   242
            return '\t%s' % date
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Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
   243
        if fn and ' ' in fn:
31271
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diff changeset
   244
            return '\t'
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diff changeset
   245
        return ''
3026
d838bfac668d Remove dates from git export file lines - they confuse git-apply
Brendan Cully <brendan@kublai.com>
parents: 2907
diff changeset
   246
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diff changeset
   247
    sentinel = [], ()
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08a0f04b56bd many, many trivial check-code fixups
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parents: 10264
diff changeset
   248
    if not a and not b:
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diff changeset
   249
        return sentinel
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parents: 23294
diff changeset
   250
1f510efcd5f3 mdiff.unidiff: add support for noprefix
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diff changeset
   251
    if opts.noprefix:
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diff changeset
   252
        aprefix = bprefix = ''
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parents: 23294
diff changeset
   253
    else:
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parents: 23294
diff changeset
   254
        aprefix = 'a/'
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
   255
        bprefix = 'b/'
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Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
   256
1379
8ee7ce877be2 Clean up mdiff imports
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parents: 1378
diff changeset
   257
    epoch = util.datestr((0, 0))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
   258
15437
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
   259
    fn1 = util.pconvert(fn1)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
   260
    fn2 = util.pconvert(fn2)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
   261
35951
8b6dd3922f70 patch: unify check_binary and binary flags
Yuya Nishihara <yuya@tcha.org>
parents: 35943
diff changeset
   262
    if binary:
6871
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Martin Geisler <mg@daimi.au.dk>
parents: 6470
diff changeset
   263
        if a and b and len(a) == len(b) and a == b:
31271
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parents: 31269
diff changeset
   264
            return sentinel
b3861be6aa6c mdiff: distinguish diff headers from hunks in unidiff()
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parents: 31269
diff changeset
   265
        headerlines = []
31273
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Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   266
        hunks = (None, ['Binary file %s has changed\n' % fn1]),
1723
fde8fb2cbede Fix diff against an empty file (issue124) and add a test for this.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1637
diff changeset
   267
    elif not a:
35952
9e641c4525a2 mdiff: use str.startswith/endswith() instead of slicing
Yuya Nishihara <yuya@tcha.org>
parents: 35951
diff changeset
   268
        without_newline = not b.endswith('\n')
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
   269
        b = splitnewlines(b)
1723
fde8fb2cbede Fix diff against an empty file (issue124) and add a test for this.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1637
diff changeset
   270
        if a is None:
16362
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Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
   271
            l1 = '--- /dev/null%s' % datetag(epoch)
1723
fde8fb2cbede Fix diff against an empty file (issue124) and add a test for this.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1637
diff changeset
   272
        else:
23299
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Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
   273
            l1 = "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1))
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
   274
        l2 = "+++ %s%s" % (bprefix + fn2, datetag(bd, fn2))
31271
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parents: 31269
diff changeset
   275
        headerlines = [l1, l2]
31273
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   276
        size = len(b)
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   277
        hunkrange = (0, 0, 1, size)
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   278
        hunklines = ["@@ -0,0 +1,%d @@\n" % size] + ["+" + e for e in b]
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   279
        if without_newline:
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
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parents: 35850
diff changeset
   280
            hunklines[-1] += '\n'
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   281
            hunklines.append(_missing_newline_marker)
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   282
        hunks = (hunkrange, hunklines),
1723
fde8fb2cbede Fix diff against an empty file (issue124) and add a test for this.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1637
diff changeset
   283
    elif not b:
35952
9e641c4525a2 mdiff: use str.startswith/endswith() instead of slicing
Yuya Nishihara <yuya@tcha.org>
parents: 35951
diff changeset
   284
        without_newline = not a.endswith('\n')
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
   285
        a = splitnewlines(a)
23299
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
   286
        l1 = "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1))
1723
fde8fb2cbede Fix diff against an empty file (issue124) and add a test for this.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1637
diff changeset
   287
        if b is None:
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
   288
            l2 = '+++ /dev/null%s' % datetag(epoch)
1723
fde8fb2cbede Fix diff against an empty file (issue124) and add a test for this.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1637
diff changeset
   289
        else:
23299
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
   290
            l2 = "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2))
31271
b3861be6aa6c mdiff: distinguish diff headers from hunks in unidiff()
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31269
diff changeset
   291
        headerlines = [l1, l2]
31273
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   292
        size = len(a)
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   293
        hunkrange = (1, size, 0, 0)
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   294
        hunklines = ["@@ -1,%d +0,0 @@\n" % size] + ["-" + e for e in a]
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   295
        if without_newline:
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   296
            hunklines[-1] += '\n'
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   297
            hunklines.append(_missing_newline_marker)
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   298
        hunks = (hunkrange, hunklines),
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
   299
    else:
35852
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   300
        hunks = _unidiff(a, b, opts=opts)
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   301
        if not next(hunks):
31271
b3861be6aa6c mdiff: distinguish diff headers from hunks in unidiff()
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31269
diff changeset
   302
            return sentinel
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
   303
31271
b3861be6aa6c mdiff: distinguish diff headers from hunks in unidiff()
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31269
diff changeset
   304
        headerlines = [
b3861be6aa6c mdiff: distinguish diff headers from hunks in unidiff()
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31269
diff changeset
   305
            "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1)),
b3861be6aa6c mdiff: distinguish diff headers from hunks in unidiff()
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31269
diff changeset
   306
            "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2)),
b3861be6aa6c mdiff: distinguish diff headers from hunks in unidiff()
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31269
diff changeset
   307
        ]
31273
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   308
92714858dd3e mdiff: let unidiff return (diffheader, hunks)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31272
diff changeset
   309
    return headerlines, hunks
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
   310
31267
881ed6a4cf87 mdiff: compute newlines-splitted texts within _unidiff
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 30806
diff changeset
   311
def _unidiff(t1, t2, opts=defaultopts):
31269
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   312
    """Yield hunks of a headerless unified diff from t1 and t2 texts.
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   313
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   314
    Each hunk consists of a (hunkrange, hunklines) tuple where `hunkrange` is a
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   315
    tuple (s1, l1, s2, l2) representing the range information of the hunk to
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   316
    form the '@@ -s1,l1 +s2,l2 @@' header and `hunklines` is a list of lines
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   317
    of the hunk combining said header followed by line additions and
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   318
    deletions.
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   319
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   320
    The hunks are prefixed with a bool.
31269
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   321
    """
31267
881ed6a4cf87 mdiff: compute newlines-splitted texts within _unidiff
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 30806
diff changeset
   322
    l1 = splitnewlines(t1)
881ed6a4cf87 mdiff: compute newlines-splitted texts within _unidiff
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 30806
diff changeset
   323
    l2 = splitnewlines(t2)
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   324
    def contextend(l, len):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
   325
        ret = l + opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   326
        if ret > len:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   327
            ret = len
3b1b44b917f4 Add new bdiff based unidiff generation.
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parents: 1540
diff changeset
   328
        return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   329
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   330
    def contextstart(l):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
   331
        ret = l - opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   332
        if ret < 0:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   333
            return 0
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   334
        return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   335
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   336
    lastfunc = [0, '']
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
   337
    def yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   338
        (astart, a2, bstart, b2, delta) = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   339
        aend = contextend(a2, len(l1))
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   340
        alen = aend - astart
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   341
        blen = b2 - bstart + aend - a2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   342
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   343
        func = ""
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
   344
        if opts.showfunc:
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   345
            lastpos, func = lastfunc
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   346
            # walk backwards from the start of the context up to the start of
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   347
            # the previous hunk context until we find a line starting with an
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   348
            # alphanumeric char.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   349
            for i in xrange(astart - 1, lastpos - 1, -1):
35583
2f123f309f61 py3: slice on bytes instead of indexing
Pulkit Goyal <7895pulkit@gmail.com>
parents: 35277
diff changeset
   350
                if l1[i][0:1].isalnum():
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   351
                    func = ' ' + l1[i].rstrip()[:40]
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   352
                    lastfunc[1] = func
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   353
                    break
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   354
            # by recording this hunk's starting point as the next place to
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   355
            # start looking for function lines, we avoid reading any line in
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   356
            # the file more than once.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
   357
            lastfunc[0] = astart
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   358
15462
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
   359
        # zero-length hunk ranges report their start line as one less
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
   360
        if alen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
   361
            astart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
   362
        if blen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
   363
            bstart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
   364
31269
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   365
        hunkrange = astart, alen, bstart, blen
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   366
        hunklines = (
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   367
            ["@@ -%d,%d +%d,%d @@%s\n" % (hunkrange + (func,))]
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   368
            + delta
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   369
            + [' ' + l1[x] for x in xrange(a2, aend)]
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   370
        )
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   371
        # If either file ends without a newline and the last line of
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   372
        # that file is part of a hunk, a marker is printed. If the
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   373
        # last line of both files is identical and neither ends in
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   374
        # a newline, print only one marker. That's the only case in
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   375
        # which the hunk can end in a shared line without a newline.
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   376
        skip = False
35952
9e641c4525a2 mdiff: use str.startswith/endswith() instead of slicing
Yuya Nishihara <yuya@tcha.org>
parents: 35951
diff changeset
   377
        if not t1.endswith('\n') and astart + alen == len(l1) + 1:
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   378
            for i in xrange(len(hunklines) - 1, -1, -1):
35952
9e641c4525a2 mdiff: use str.startswith/endswith() instead of slicing
Yuya Nishihara <yuya@tcha.org>
parents: 35951
diff changeset
   379
                if hunklines[i].startswith(('-', ' ')):
9e641c4525a2 mdiff: use str.startswith/endswith() instead of slicing
Yuya Nishihara <yuya@tcha.org>
parents: 35951
diff changeset
   380
                    if hunklines[i].startswith(' '):
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   381
                        skip = True
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   382
                    hunklines[i] += '\n'
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   383
                    hunklines.insert(i + 1, _missing_newline_marker)
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   384
                    break
35952
9e641c4525a2 mdiff: use str.startswith/endswith() instead of slicing
Yuya Nishihara <yuya@tcha.org>
parents: 35951
diff changeset
   385
        if not skip and not t2.endswith('\n') and bstart + blen == len(l2) + 1:
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   386
            for i in xrange(len(hunklines) - 1, -1, -1):
35952
9e641c4525a2 mdiff: use str.startswith/endswith() instead of slicing
Yuya Nishihara <yuya@tcha.org>
parents: 35951
diff changeset
   387
                if hunklines[i].startswith('+'):
35851
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   388
                    hunklines[i] += '\n'
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   389
                    hunklines.insert(i + 1, _missing_newline_marker)
a9d07bd8f758 mdiff: explicitly compute places for the newline marker
Joerg Sonnenberger <joerg@bec.de>
parents: 35850
diff changeset
   390
                    break
31269
5e7fd3a0b17f mdiff: let _unidiff yield hunks as (<range information>, <hunk lines>)
Denis Laxalde <denis.laxalde@logilab.fr>
parents: 31268
diff changeset
   391
        yield hunkrange, hunklines
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   392
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   393
    # bdiff.blocks gives us the matching sequences in the files.  The loop
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   394
    # below finds the spaces between those matching sequences and translates
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   395
    # them into diff output.
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   396
    #
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   397
    hunk = None
16089
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   398
    ignoredlines = 0
35852
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   399
    has_hunks = False
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
   400
    for s, stype in allblocks(t1, t2, opts, l1, l2):
16089
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   401
        a1, a2, b1, b2 = s
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
   402
        if stype != '!':
16089
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   403
            if stype == '~':
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   404
                # The diff context lines are based on t1 content. When
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   405
                # blank lines are ignored, the new lines offsets must
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   406
                # be adjusted as if equivalent blocks ('~') had the
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   407
                # same sizes on both sides.
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   408
                ignoredlines += (b2 - b1) - (a2 - a1)
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
   409
            continue
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   410
        delta = []
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   411
        old = l1[a1:a2]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   412
        new = l2[b1:b2]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   413
16089
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   414
        b1 -= ignoredlines
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
   415
        b2 -= ignoredlines
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   416
        astart = contextstart(a1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   417
        bstart = contextstart(b1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   418
        prev = None
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   419
        if hunk:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   420
            # join with the previous hunk if it falls inside the context
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
   421
            if astart < hunk[1] + opts.context + 1:
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   422
                prev = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   423
                astart = hunk[1]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   424
                bstart = hunk[3]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   425
            else:
35852
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   426
                if not has_hunks:
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   427
                    has_hunks = True
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   428
                    yield True
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
   429
                for x in yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   430
                    yield x
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   431
        if prev:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   432
            # we've joined the previous hunk, record the new ending points.
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   433
            hunk[1] = a2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   434
            hunk[3] = b2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   435
            delta = hunk[4]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   436
        else:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   437
            # create a new hunk
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
   438
            hunk = [astart, a2, bstart, b2, delta]
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   439
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
   440
        delta[len(delta):] = [' ' + x for x in l1[astart:a1]]
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
   441
        delta[len(delta):] = ['-' + x for x in old]
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
   442
        delta[len(delta):] = ['+' + x for x in new]
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   443
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   444
    if hunk:
35852
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   445
        if not has_hunks:
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   446
            has_hunks = True
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   447
            yield True
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
   448
        for x in yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   449
            yield x
35852
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   450
    elif not has_hunks:
6a33e81e4c5e mdiff: remove rewindhunk by yielding a bool first to indicate data
Joerg Sonnenberger <joerg@bec.de>
parents: 35851
diff changeset
   451
        yield False
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
   452
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   453
def b85diff(to, tn):
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   454
    '''print base85-encoded binary diff'''
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   455
    def fmtline(line):
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   456
        l = len(line)
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   457
        if l <= 26:
35943
bdb6ec909878 py3: use pycompat.bytechr instead of chr
Pulkit Goyal <7895pulkit@gmail.com>
parents: 35876
diff changeset
   458
            l = pycompat.bytechr(ord('A') + l - 1)
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   459
        else:
35943
bdb6ec909878 py3: use pycompat.bytechr instead of chr
Pulkit Goyal <7895pulkit@gmail.com>
parents: 35876
diff changeset
   460
            l = pycompat.bytechr(l - 26 + ord('a') - 1)
32201
4462a981e8df base85: proxy through util module
Yuya Nishihara <yuya@tcha.org>
parents: 32200
diff changeset
   461
        return '%c%s\n' % (l, util.b85encode(line, True))
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   462
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   463
    def chunk(text, csize=52):
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   464
        l = len(text)
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   465
        i = 0
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   466
        while i < l:
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   467
            yield text[i:i + csize]
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   468
            i += csize
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   469
17946
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   470
    if to is None:
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   471
        to = ''
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   472
    if tn is None:
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   473
        tn = ''
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   474
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   475
    if to == tn:
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   476
        return ''
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   477
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   478
    # TODO: deltas
17946
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   479
    ret = []
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   480
    ret.append('GIT binary patch\n')
34506
1d804c22c671 py3: use '%d' for integers instead of '%s'
Pulkit Goyal <7895pulkit@gmail.com>
parents: 34013
diff changeset
   481
    ret.append('literal %d\n' % len(tn))
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   482
    for l in chunk(zlib.compress(tn)):
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   483
        ret.append(fmtline(l))
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   484
    ret.append('\n')
17946
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
   485
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   486
    return ''.join(ret)
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
   487
120
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   488
def patchtext(bin):
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   489
    pos = 0
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   490
    t = []
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   491
    while pos < len(bin):
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   492
        p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12])
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   493
        pos += 12
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   494
        t.append(bin[pos:pos + l])
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   495
        pos += l
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   496
    return "".join(t)
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
   497
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
   498
def patch(a, bin):
12025
2315a95ee887 mdiff.patch(): add a special case for when the base text is empty
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10614
diff changeset
   499
    if len(a) == 0:
2315a95ee887 mdiff.patch(): add a special case for when the base text is empty
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10614
diff changeset
   500
        # skip over trivial delta header
15657
d976b1ef6760 util: don't mess with builtins to emulate buffer()
Matt Mackall <mpm@selenic.com>
parents: 15530
diff changeset
   501
        return util.buffer(bin, 12)
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
   502
    return mpatch.patches(a, [bin])
432
3b9e3d3d2810 Start using bdiff for generating deltas
mpm@selenic.com
parents: 396
diff changeset
   503
4361
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
   504
# similar to difflib.SequenceMatcher.get_matching_blocks
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
   505
def get_matching_blocks(a, b):
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
   506
    return [(d[0], d[2], d[1] - d[0]) for d in bdiff.blocks(a, b)]
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
   507
5367
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
   508
def trivialdiffheader(length):
27711
7a678a12a5cf mdiff: don't emit a diff header for empty trivial deltas
Mike Hommey <mh@glandium.org>
parents: 27484
diff changeset
   509
    return struct.pack(">lll", 0, 0, length) if length else ''
5367
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
   510
24119
a5a06c9c7407 mdiff: add helper for making deltas which replace the full text of a revision
Mike Edgar <adgar@google.com>
parents: 23299
diff changeset
   511
def replacediffheader(oldlen, newlen):
a5a06c9c7407 mdiff: add helper for making deltas which replace the full text of a revision
Mike Edgar <adgar@google.com>
parents: 23299
diff changeset
   512
    return struct.pack(">lll", 0, oldlen, newlen)