Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/mdiff.py @ 23293:b89856abf4e2

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mdiff.diffopts: add doc comment for nobinary
author Siddharth Agarwal <sid0@fb.com>
date Wed, 12 Nov 2014 23:19:44 -0800
parents 3fbef7ac26f0
children ec8c73b02e2e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
239
75840796e8e2 mdiff.py: kill #! line, add copyright notice
mpm@selenic.com
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1 # mdiff.py - diff and patch routines for mercurial
75840796e8e2 mdiff.py: kill #! line, add copyright notice
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2 #
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3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from i18n import _
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9 import bdiff, mpatch, util, base85
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10 import re, struct, zlib
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11
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12 def splitnewlines(text):
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13 '''like str.splitlines, but only split on newlines.'''
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14 lines = [l + '\n' for l in text.split('\n')]
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15 if lines:
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16 if lines[-1] == '\n':
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17 lines.pop()
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18 else:
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19 lines[-1] = lines[-1][:-1]
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20 return lines
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21
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22 class diffopts(object):
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23 '''context is the number of context lines
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24 text treats all files as text
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25 showfunc enables diff -p output
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26 git enables the git extended patch format
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27 nodates removes dates from diff headers
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28 nobinary ignores binary files
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29 ignorews ignores all whitespace changes in the diff
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30 ignorewsamount ignores changes in the amount of whitespace
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31 ignoreblanklines ignores changes whose lines are all blank
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32 upgrade generates git diffs to avoid data loss
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33 '''
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34
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35 defaults = {
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36 'context': 3,
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37 'text': False,
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38 'showfunc': False,
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39 'git': False,
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40 'nodates': False,
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41 'nobinary': False,
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42 'ignorews': False,
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43 'ignorewsamount': False,
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44 'ignoreblanklines': False,
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45 'upgrade': False,
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46 }
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47
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48 __slots__ = defaults.keys()
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49
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50 def __init__(self, **opts):
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51 for k in self.__slots__:
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52 v = opts.get(k)
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53 if v is None:
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54 v = self.defaults[k]
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55 setattr(self, k, v)
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56
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57 try:
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58 self.context = int(self.context)
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59 except ValueError:
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60 raise util.Abort(_('diff context lines count must be '
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61 'an integer, not %r') % self.context)
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62
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63 def copy(self, **kwargs):
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64 opts = dict((k, getattr(self, k)) for k in self.defaults)
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65 opts.update(kwargs)
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66 return diffopts(**opts)
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67
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68 defaultopts = diffopts()
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69
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70 def wsclean(opts, text, blank=True):
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71 if opts.ignorews:
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72 text = bdiff.fixws(text, 1)
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73 elif opts.ignorewsamount:
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74 text = bdiff.fixws(text, 0)
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75 if blank and opts.ignoreblanklines:
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76 text = re.sub('\n+', '\n', text).strip('\n')
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77 return text
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78
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79 def splitblock(base1, lines1, base2, lines2, opts):
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80 # The input lines matches except for interwoven blank lines. We
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81 # transform it into a sequence of matching blocks and blank blocks.
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82 lines1 = [(wsclean(opts, l) and 1 or 0) for l in lines1]
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83 lines2 = [(wsclean(opts, l) and 1 or 0) for l in lines2]
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84 s1, e1 = 0, len(lines1)
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85 s2, e2 = 0, len(lines2)
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86 while s1 < e1 or s2 < e2:
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87 i1, i2, btype = s1, s2, '='
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88 if (i1 >= e1 or lines1[i1] == 0
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89 or i2 >= e2 or lines2[i2] == 0):
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90 # Consume the block of blank lines
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91 btype = '~'
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92 while i1 < e1 and lines1[i1] == 0:
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93 i1 += 1
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94 while i2 < e2 and lines2[i2] == 0:
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95 i2 += 1
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96 else:
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97 # Consume the matching lines
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98 while i1 < e1 and lines1[i1] == 1 and lines2[i2] == 1:
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99 i1 += 1
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100 i2 += 1
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101 yield [base1 + s1, base1 + i1, base2 + s2, base2 + i2], btype
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102 s1 = i1
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103 s2 = i2
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104
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105 def allblocks(text1, text2, opts=None, lines1=None, lines2=None, refine=False):
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106 """Return (block, type) tuples, where block is an mdiff.blocks
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107 line entry. type is '=' for blocks matching exactly one another
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108 (bdiff blocks), '!' for non-matching blocks and '~' for blocks
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109 matching only after having filtered blank lines. If refine is True,
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110 then '~' blocks are refined and are only made of blank lines.
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111 line1 and line2 are text1 and text2 split with splitnewlines() if
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112 they are already available.
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113 """
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114 if opts is None:
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115 opts = defaultopts
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116 if opts.ignorews or opts.ignorewsamount:
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117 text1 = wsclean(opts, text1, False)
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118 text2 = wsclean(opts, text2, False)
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119 diff = bdiff.blocks(text1, text2)
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120 for i, s1 in enumerate(diff):
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121 # The first match is special.
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122 # we've either found a match starting at line 0 or a match later
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123 # in the file. If it starts later, old and new below will both be
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124 # empty and we'll continue to the next match.
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125 if i > 0:
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126 s = diff[i - 1]
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127 else:
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128 s = [0, 0, 0, 0]
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diff changeset
129 s = [s[1], s1[0], s[3], s1[2]]
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
130
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
131 # bdiff sometimes gives huge matches past eof, this check eats them,
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
132 # and deals with the special first match case described above
15529
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
133 if s[0] != s[1] or s[2] != s[3]:
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
134 type = '!'
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
135 if opts.ignoreblanklines:
15529
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
136 if lines1 is None:
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
137 lines1 = splitnewlines(text1)
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
138 if lines2 is None:
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
139 lines2 = splitnewlines(text2)
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
140 old = wsclean(opts, "".join(lines1[s[0]:s[1]]))
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
141 new = wsclean(opts, "".join(lines2[s[2]:s[3]]))
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
142 if old == new:
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
143 type = '~'
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
144 yield s, type
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
145 yield s1, '='
15525
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
146
17940
c84ef0047a94 diff: unify calls to diffline
Guillermo P?rez <bisho@fb.com>
parents: 17939
diff changeset
147 def unidiff(a, ad, b, bd, fn1, fn2, opts=defaultopts):
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
148 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
149 if not opts.git and not opts.nodates:
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
150 return '\t%s\n' % date
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
151 if fn and ' ' in fn:
4679
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
152 return '\t\n'
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
153 return '\n'
3026
d838bfac668d Remove dates from git export file lines - they confuse git-apply
Brendan Cully <brendan@kublai.com>
parents: 2907
diff changeset
154
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
155 if not a and not b:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
156 return ""
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
157 epoch = util.datestr((0, 0))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
158
15437
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
159 fn1 = util.pconvert(fn1)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
160 fn2 = util.pconvert(fn2)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
161
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
162 if not opts.text and (util.binary(a) or util.binary(b)):
6871
13fe85fe396b mdiff: compare content of binary files directly
Martin Geisler <mg@daimi.au.dk>
parents: 6470
diff changeset
163 if a and b and len(a) == len(b) and a == b:
4103
544838cc1158 Don't lie that "binary file has changed"
tailgunner@smtp.ru
parents: 3199
diff changeset
164 return ""
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
165 l = ['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
166 elif not a:
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
167 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
168 if a is None:
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
169 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
170 else:
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
171 l1 = "--- %s%s" % ("a/" + fn1, datetag(ad, fn1))
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
172 l2 = "+++ %s%s" % ("b/" + fn2, datetag(bd, fn2))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
173 l3 = "@@ -0,0 +1,%d @@\n" % len(b)
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
174 l = [l1, l2, l3] + ["+" + e for e in 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
175 elif not b:
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
176 a = splitnewlines(a)
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
177 l1 = "--- %s%s" % ("a/" + 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
178 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
179 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
180 else:
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
181 l2 = "+++ %s%s" % ("b/" + fn2, datetag(bd, fn2))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
182 l3 = "@@ -1,%d +0,0 @@\n" % len(a)
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
183 l = [l1, l2, l3] + ["-" + e for e in a]
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
184 else:
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
185 al = splitnewlines(a)
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
186 bl = splitnewlines(b)
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
187 l = list(_unidiff(a, b, al, bl, opts=opts))
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
188 if not l:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
189 return ""
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
190
16362
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
191 l.insert(0, "--- a/%s%s" % (fn1, datetag(ad, fn1)))
16b75661828e mdiff: fix diff header generation for files with spaces (issue3357)
Patrick Mezard <patrick@mezard.eu>
parents: 16089
diff changeset
192 l.insert(1, "+++ b/%s%s" % (fn2, datetag(bd, fn2)))
170
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
193
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
194 for ln in xrange(len(l)):
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
195 if l[ln][-1] != '\n':
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
196 l[ln] += "\n\ No newline at end of file\n"
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
197
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
198 return "".join(l)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
199
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
200 # creates a headerless unified diff
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
201 # t1 and t2 are the text to be diffed
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
202 # l1 and l2 are the text broken up into lines
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
203 def _unidiff(t1, t2, l1, l2, opts=defaultopts):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
204 def contextend(l, len):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
205 ret = l + opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
206 if ret > len:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
207 ret = len
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
208 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
209
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
210 def contextstart(l):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
211 ret = l - opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
212 if ret < 0:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
213 return 0
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
214 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
215
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
216 lastfunc = [0, '']
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
217 def yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
218 (astart, a2, bstart, b2, delta) = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
219 aend = contextend(a2, len(l1))
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
220 alen = aend - astart
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
221 blen = b2 - bstart + aend - a2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
222
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
223 func = ""
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
224 if opts.showfunc:
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
225 lastpos, func = lastfunc
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
226 # 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
227 # 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
228 # alphanumeric char.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
229 for i in xrange(astart - 1, lastpos - 1, -1):
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
230 if l1[i][0].isalnum():
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
231 func = ' ' + l1[i].rstrip()[:40]
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
232 lastfunc[1] = func
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
233 break
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
234 # 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
235 # 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
236 # the file more than once.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
237 lastfunc[0] = astart
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
238
15462
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
239 # 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
240 if alen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
241 astart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
242 if blen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
243 bstart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
244
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
245 yield "@@ -%d,%d +%d,%d @@%s\n" % (astart, alen,
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
246 bstart, blen, func)
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
247 for x in delta:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
248 yield x
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
249 for x in xrange(a2, aend):
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
250 yield ' ' + l1[x]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
251
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
252 # 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
253 # below finds the spaces between those matching sequences and translates
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
254 # them into diff output.
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
255 #
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
256 hunk = None
16089
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
257 ignoredlines = 0
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
258 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
259 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
260 if stype != '!':
16089
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
261 if stype == '~':
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
262 # 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
263 # 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
264 # 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
265 # same sizes on both sides.
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
266 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
267 continue
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
268 delta = []
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
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269 old = l1[a1:a2]
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parents: 1540
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270 new = l2[b1:b2]
3b1b44b917f4 Add new bdiff based unidiff generation.
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parents: 1540
diff changeset
271
16089
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
272 b1 -= ignoredlines
2e8f4b82c551 mdiff: adjust hunk offsets with --ignore-blank-lines (issue3234)
Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
273 b2 -= ignoredlines
1637
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mason@suse.com
parents: 1540
diff changeset
274 astart = contextstart(a1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
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275 bstart = contextstart(b1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
276 prev = None
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
277 if hunk:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
278 # 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
279 if astart < hunk[1] + opts.context + 1:
1637
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mason@suse.com
parents: 1540
diff changeset
280 prev = hunk
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parents: 1540
diff changeset
281 astart = hunk[1]
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mason@suse.com
parents: 1540
diff changeset
282 bstart = hunk[3]
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mason@suse.com
parents: 1540
diff changeset
283 else:
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
284 for x in yieldhunk(hunk):
1637
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mason@suse.com
parents: 1540
diff changeset
285 yield x
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mason@suse.com
parents: 1540
diff changeset
286 if prev:
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mason@suse.com
parents: 1540
diff changeset
287 # we've joined the previous hunk, record the new ending points.
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
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288 hunk[1] = a2
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parents: 1540
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289 hunk[3] = b2
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mason@suse.com
parents: 1540
diff changeset
290 delta = hunk[4]
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mason@suse.com
parents: 1540
diff changeset
291 else:
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parents: 1540
diff changeset
292 # create a new hunk
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
293 hunk = [astart, a2, bstart, b2, delta]
1637
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mason@suse.com
parents: 1540
diff changeset
294
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
295 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
296 delta[len(delta):] = ['-' + x for x in old]
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
297 delta[len(delta):] = ['+' + x for x in new]
1637
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parents: 1540
diff changeset
298
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parents: 1540
diff changeset
299 if hunk:
10614
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Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
300 for x in yieldhunk(hunk):
1637
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mason@suse.com
parents: 1540
diff changeset
301 yield x
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mason@suse.com
parents: 1540
diff changeset
302
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d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
303 def b85diff(to, tn):
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
304 '''print base85-encoded binary diff'''
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
305 def fmtline(line):
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
306 l = len(line)
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
307 if l <= 26:
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
308 l = chr(ord('A') + l - 1)
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
309 else:
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
310 l = chr(l - 26 + ord('a') - 1)
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
311 return '%c%s\n' % (l, base85.b85encode(line, True))
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
312
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
313 def chunk(text, csize=52):
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
314 l = len(text)
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
315 i = 0
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
316 while i < l:
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
317 yield text[i:i + csize]
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
318 i += csize
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
319
17946
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Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
320 if to is None:
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Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
321 to = ''
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
322 if tn is None:
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
323 tn = ''
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
324
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
325 if to == tn:
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
326 return ''
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
327
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
328 # TODO: deltas
17946
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Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
329 ret = []
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
330 ret.append('GIT binary patch\n')
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
331 ret.append('literal %s\n' % len(tn))
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
332 for l in chunk(zlib.compress(tn)):
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
333 ret.append(fmtline(l))
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
334 ret.append('\n')
17946
1e13b1184292 diff: move index header generation to patch
Guillermo P?rez <bisho@fb.com>
parents: 17941
diff changeset
335
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
336 return ''.join(ret)
d587925680d9 diff: move b85diff to mdiff module
Guillermo P?rez <bisho at fb.com>
parents: 16362
diff changeset
337
120
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
338 def patchtext(bin):
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mpm@selenic.com
parents: 75
diff changeset
339 pos = 0
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
340 t = []
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
341 while pos < len(bin):
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
342 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
343 pos += 12
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
344 t.append(bin[pos:pos + l])
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mpm@selenic.com
parents: 75
diff changeset
345 pos += l
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
346 return "".join(t)
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
347
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
348 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
349 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
350 # 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
351 return util.buffer(bin, 12)
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
352 return mpatch.patches(a, [bin])
432
3b9e3d3d2810 Start using bdiff for generating deltas
mpm@selenic.com
parents: 396
diff changeset
353
4361
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
354 # 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
355 def get_matching_blocks(a, b):
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
356 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
357
5367
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
358 def trivialdiffheader(length):
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
359 return struct.pack(">lll", 0, 0, length)
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
360
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
361 patches = mpatch.patches
2078
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1723
diff changeset
362 patchedsize = mpatch.patchedsize
432
3b9e3d3d2810 Start using bdiff for generating deltas
mpm@selenic.com
parents: 396
diff changeset
363 textdiff = bdiff.bdiff