Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/mdiff.py @ 15525:935bf2e7dbc5

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mdiff: extract blocks whitespace normalization in diffblocks() We want to reuse it in annotate for whitespace normalization.
author Patrick Mezard <pmezard@gmail.com>
date Fri, 18 Nov 2011 11:53:38 +0100
parents 646759147717
children e6519c628454
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
239
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mpm@selenic.com
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1 # mdiff.py - diff and patch routines for mercurial
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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
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10 import re, struct
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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 ignorews ignores all whitespace changes in the diff
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29 ignorewsamount ignores changes in the amount of whitespace
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30 ignoreblanklines ignores changes whose lines are all blank
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31 upgrade generates git diffs to avoid data loss
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32 '''
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33
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34 defaults = {
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35 'context': 3,
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36 'text': False,
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37 'showfunc': False,
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38 'git': False,
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39 'nodates': False,
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40 'ignorews': False,
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41 'ignorewsamount': False,
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42 'ignoreblanklines': False,
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43 'upgrade': False,
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44 }
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45
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46 __slots__ = defaults.keys()
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47
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48 def __init__(self, **opts):
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49 for k in self.__slots__:
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50 v = opts.get(k)
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51 if v is None:
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52 v = self.defaults[k]
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53 setattr(self, k, v)
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54
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55 try:
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56 self.context = int(self.context)
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57 except ValueError:
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58 raise util.Abort(_('diff context lines count must be '
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59 'an integer, not %r') % self.context)
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60
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61 def copy(self, **kwargs):
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62 opts = dict((k, getattr(self, k)) for k in self.defaults)
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63 opts.update(kwargs)
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64 return diffopts(**opts)
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65
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66 defaultopts = diffopts()
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67
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68 def wsclean(opts, text, blank=True):
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69 if opts.ignorews:
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70 text = re.sub('[ \t\r]+', '', text)
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71 elif opts.ignorewsamount:
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72 text = re.sub('[ \t\r]+', ' ', text)
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73 text = text.replace(' \n', '\n')
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74 if blank and opts.ignoreblanklines:
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75 text = re.sub('\n+', '\n', text).strip('\n')
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76 return text
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77
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78 def diffblocks(text1, text2, opts=None, lines1=None, lines2=None):
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79 """Return changed blocks between text1 and text2, the blocks in-between
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80 those emitted by bdiff.blocks. Take in account the whitespace normalization
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81 rules defined by opts.
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82 line1 and line2 are text1 and text2 split with splitnewlines() if they are
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83 already available.
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84 """
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85 if opts is None:
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86 opts = defaultopts
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87 if lines1 is None:
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88 lines1 = splitnewlines(text1)
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89 if lines2 is None:
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90 lines2 = splitnewlines(text2)
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91 if opts.ignorews or opts.ignorewsamount:
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92 text1 = wsclean(opts, text1, False)
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93 text2 = wsclean(opts, text2, False)
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94 diff = bdiff.blocks(text1, text2)
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95 for i, s1 in enumerate(diff):
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96 # The first match is special.
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97 # we've either found a match starting at line 0 or a match later
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98 # in the file. If it starts later, old and new below will both be
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99 # empty and we'll continue to the next match.
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100 if i > 0:
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101 s = diff[i - 1]
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102 else:
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103 s = [0, 0, 0, 0]
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104 s = [s[1], s1[0], s[3], s1[2]]
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105 old = lines1[s[0]:s[1]]
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106 new = lines2[s[2]:s[3]]
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107
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108 # bdiff sometimes gives huge matches past eof, this check eats them,
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109 # and deals with the special first match case described above
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110 if not old and not new:
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111 continue
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112
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113 if opts.ignoreblanklines:
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114 if wsclean(opts, "".join(old)) == wsclean(opts, "".join(new)):
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115 continue
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116 yield s
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117
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118 def diffline(revs, a, b, opts):
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119 parts = ['diff']
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120 if opts.git:
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121 parts.append('--git')
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122 if revs and not opts.git:
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123 parts.append(' '.join(["-r %s" % rev for rev in revs]))
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124 if opts.git:
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125 parts.append('a/%s' % a)
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126 parts.append('b/%s' % b)
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127 else:
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128 parts.append(a)
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129 return ' '.join(parts) + '\n'
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130
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131 def unidiff(a, ad, b, bd, fn1, fn2, r=None, opts=defaultopts):
4679
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
132 def datetag(date, addtab=True):
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
133 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
134 return '\t%s\n' % date
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
135 if addtab and ' ' in fn1:
4679
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
136 return '\t\n'
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
137 return '\n'
3026
d838bfac668d Remove dates from git export file lines - they confuse git-apply
Brendan Cully <brendan@kublai.com>
parents: 2907
diff changeset
138
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
139 if not a and not b:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
140 return ""
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
141 epoch = util.datestr((0, 0))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
142
15437
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
143 fn1 = util.pconvert(fn1)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
144 fn2 = util.pconvert(fn2)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
145
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
146 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
147 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
148 return ""
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
149 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
150 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
151 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
152 if a is None:
4679
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
153 l1 = '--- /dev/null%s' % datetag(epoch, False)
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
154 else:
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
155 l1 = "--- %s%s" % ("a/" + fn1, datetag(ad))
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
156 l2 = "+++ %s%s" % ("b/" + fn2, datetag(bd))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
157 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
158 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
159 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
160 a = splitnewlines(a)
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
161 l1 = "--- %s%s" % ("a/" + fn1, datetag(ad))
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
162 if b is None:
4679
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
163 l2 = '+++ /dev/null%s' % datetag(epoch, False)
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
164 else:
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
165 l2 = "+++ %s%s" % ("b/" + fn2, datetag(bd))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
166 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
167 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
168 else:
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
169 al = splitnewlines(a)
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
170 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
171 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
172 if not l:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
173 return ""
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
174
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
175 l.insert(0, "--- a/%s%s" % (fn1, datetag(ad)))
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
176 l.insert(1, "+++ b/%s%s" % (fn2, datetag(bd)))
170
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
177
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
178 for ln in xrange(len(l)):
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
179 if l[ln][-1] != '\n':
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
180 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
181
396
8f8bb77d560e Show revisions in diffs like CVS, based on a patch from Goffredo Baroncelli.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 361
diff changeset
182 if r:
7200
ca5ac40949dc patch/diff: use a separate function to write the first line of a file diff
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents: 6871
diff changeset
183 l.insert(0, diffline(r, fn1, fn2, opts))
396
8f8bb77d560e Show revisions in diffs like CVS, based on a patch from Goffredo Baroncelli.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 361
diff changeset
184
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
185 return "".join(l)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
186
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
187 # creates a headerless unified diff
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
188 # t1 and t2 are the text to be diffed
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
189 # 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
190 def _unidiff(t1, t2, l1, l2, opts=defaultopts):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
191 def contextend(l, len):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
192 ret = l + opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
193 if ret > len:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
194 ret = len
3b1b44b917f4 Add new bdiff based unidiff generation.
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diff changeset
195 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
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parents: 1540
diff changeset
196
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
197 def contextstart(l):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
198 ret = l - opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
199 if ret < 0:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
200 return 0
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
201 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
202
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
203 lastfunc = [0, '']
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
204 def yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
205 (astart, a2, bstart, b2, delta) = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
206 aend = contextend(a2, len(l1))
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
207 alen = aend - astart
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
208 blen = b2 - bstart + aend - a2
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 func = ""
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
211 if opts.showfunc:
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
212 lastpos, func = lastfunc
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
213 # 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
214 # 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
215 # alphanumeric char.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
216 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
217 if l1[i][0].isalnum():
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
218 func = ' ' + l1[i].rstrip()[:40]
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
219 lastfunc[1] = func
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
220 break
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
221 # 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
222 # 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
223 # the file more than once.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
224 lastfunc[0] = astart
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
225
15462
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
226 # 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
227 if alen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
228 astart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
229 if blen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
230 bstart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
231
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
232 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
233 bstart, blen, func)
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
234 for x in delta:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
235 yield x
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
236 for x in xrange(a2, aend):
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
237 yield ' ' + l1[x]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
238
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
239 # 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
240 # below finds the spaces between those matching sequences and translates
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
241 # them into diff output.
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
242 #
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
243 hunk = None
15525
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
244 for s in diffblocks(t1, t2, opts, l1, l2):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
245 delta = []
15525
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
246 a1, a2, b1, b2 = s
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
247 old = l1[a1:a2]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
248 new = l2[b1:b2]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
249
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
250 astart = contextstart(a1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
251 bstart = contextstart(b1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
252 prev = None
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
253 if hunk:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
254 # 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
255 if astart < hunk[1] + opts.context + 1:
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
256 prev = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
257 astart = hunk[1]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
258 bstart = hunk[3]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
259 else:
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
260 for x in yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
261 yield x
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
262 if prev:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
263 # 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
264 hunk[1] = a2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
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265 hunk[3] = b2
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266 delta = hunk[4]
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267 else:
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268 # create a new hunk
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269 hunk = [astart, a2, bstart, b2, delta]
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270
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271 delta[len(delta):] = [' ' + x for x in l1[astart:a1]]
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272 delta[len(delta):] = ['-' + x for x in old]
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273 delta[len(delta):] = ['+' + x for x in new]
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274
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275 if hunk:
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276 for x in yieldhunk(hunk):
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277 yield x
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278
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279 def patchtext(bin):
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280 pos = 0
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281 t = []
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282 while pos < len(bin):
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283 p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12])
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284 pos += 12
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285 t.append(bin[pos:pos + l])
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286 pos += l
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287 return "".join(t)
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288
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289 def patch(a, bin):
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290 if len(a) == 0:
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291 # skip over trivial delta header
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292 return buffer(bin, 12)
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293 return mpatch.patches(a, [bin])
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294
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295 # similar to difflib.SequenceMatcher.get_matching_blocks
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296 def get_matching_blocks(a, b):
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297 return [(d[0], d[2], d[1] - d[0]) for d in bdiff.blocks(a, b)]
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298
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299 def trivialdiffheader(length):
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300 return struct.pack(">lll", 0, 0, length)
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301
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302 patches = mpatch.patches
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303 patchedsize = mpatch.patchedsize
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304 textdiff = bdiff.bdiff