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annotate mercurial/mdiff.py @ 15528:a84698badf0b

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annotate: support diff whitespace filtering flags (issue3030) splitblock() was added to handle blocks returned by bdiff.blocks() which differ only by blank lines but are not made only of blank lines. I do not know exactly how it could happen but mdiff.blocks() threshold behaviour makes me think it can if those blocks are made of very popular lines mixed with popular blank lines. If it is proven to be wrong, the function can be dropped. The first implementation made annotate share diff configuration entries. But it looks like users will user -w/b for annotate but not for diff, on both the command line and hgweb. Since the latter cannot use command line entries, we introduce a new [annotate] section duplicating the diff whitespace options.
author Patrick Mezard <pmezard@gmail.com>
date Fri, 18 Nov 2011 12:04:31 +0100
parents e6519c628454
children b35cf47286a6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 splitblock(base1, lines1, base2, lines2, opts):
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79 # The input lines matches except for interwoven blank lines. We
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80 # transform it into a sequence of matching blocks and blank blocks.
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81 lines1 = [(wsclean(opts, l) and 1 or 0) for l in lines1]
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82 lines2 = [(wsclean(opts, l) and 1 or 0) for l in lines2]
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83 s1, e1 = 0, len(lines1)
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84 s2, e2 = 0, len(lines2)
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85 while s1 < e1 or s2 < e2:
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86 i1, i2, btype = s1, s2, '='
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87 if (i1 >= e1 or lines1[i1] == 0
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88 or i2 >= e2 or lines2[i2] == 0):
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89 # Consume the block of blank lines
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90 btype = '~'
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91 while i1 < e1 and lines1[i1] == 0:
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92 i1 += 1
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93 while i2 < e2 and lines2[i2] == 0:
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94 i2 += 1
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95 else:
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96 # Consume the matching lines
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97 while i1 < e1 and lines1[i1] == 1 and lines2[i2] == 1:
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98 i1 += 1
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99 i2 += 1
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100 yield [base1 + s1, base1 + i1, base2 + s2, base2 + i2], btype
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101 s1 = i1
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102 s2 = i2
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103
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104 def allblocks(text1, text2, opts=None, lines1=None, lines2=None, refine=False):
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105 """Return (block, type) tuples, where block is an mdiff.blocks
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106 line entry. type is '=' for blocks matching exactly one another
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107 (bdiff blocks), '!' for non-matching blocks and '~' for blocks
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108 matching only after having filtered blank lines. If refine is True,
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109 then '~' blocks are refined and are only made of blank lines.
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110 line1 and line2 are text1 and text2 split with splitnewlines() if
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111 they are already available.
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112 """
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113 if opts is None:
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114 opts = defaultopts
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115 if lines1 is None:
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116 lines1 = splitnewlines(text1)
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117 if lines2 is None:
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118 lines2 = splitnewlines(text2)
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119 if opts.ignorews or opts.ignorewsamount:
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120 text1 = wsclean(opts, text1, False)
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121 text2 = wsclean(opts, text2, False)
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122 diff = bdiff.blocks(text1, text2)
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123 for i, s1 in enumerate(diff):
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124 # The first match is special.
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125 # we've either found a match starting at line 0 or a match later
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126 # in the file. If it starts later, old and new below will both be
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parents: 15513
diff changeset
127 # empty and we'll continue to the next match.
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
128 if i > 0:
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
129 s = diff[i - 1]
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
130 else:
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
131 s = [0, 0, 0, 0]
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
132 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
133 old = lines1[s[0]:s[1]]
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
134 new = lines2[s[2]:s[3]]
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
135
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
136 # 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
137 # and deals with the special first match case described above
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
138 if old or new:
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
139 type = '!'
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
140 if opts.ignoreblanklines:
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
141 cold = wsclean(opts, "".join(old))
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
142 cnew = wsclean(opts, "".join(new))
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
143 if cold == cnew:
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
144 type = '~'
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
145 yield s, type
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
146 yield s1, '='
15525
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
147
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
148 def diffline(revs, a, b, opts):
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
149 parts = ['diff']
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
150 if opts.git:
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
151 parts.append('--git')
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
152 if revs and not opts.git:
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
153 parts.append(' '.join(["-r %s" % rev for rev in revs]))
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
154 if opts.git:
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
155 parts.append('a/%s' % a)
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
156 parts.append('b/%s' % b)
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
157 else:
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
158 parts.append(a)
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
159 return ' '.join(parts) + '\n'
7204
ad28279053ef Remove trailing space
Thomas Arendsen Hein <thomas@intevation.de>
parents: 7200
diff changeset
160
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
161 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
162 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
163 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
164 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
165 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
166 return '\t\n'
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
167 return '\n'
3026
d838bfac668d Remove dates from git export file lines - they confuse git-apply
Brendan Cully <brendan@kublai.com>
parents: 2907
diff changeset
168
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
169 if not a and not b:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
170 return ""
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
171 epoch = util.datestr((0, 0))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
172
15437
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
173 fn1 = util.pconvert(fn1)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
174 fn2 = util.pconvert(fn2)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
175
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
176 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
177 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
178 return ""
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
179 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
180 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
181 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
182 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
183 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
184 else:
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
185 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
186 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
187 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
188 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
189 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
190 a = splitnewlines(a)
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
191 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
192 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
193 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
194 else:
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
195 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
196 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
197 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
198 else:
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
199 al = splitnewlines(a)
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
200 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
201 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
202 if not l:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
203 return ""
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
204
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
205 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
206 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
207
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
208 for ln in xrange(len(l)):
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
209 if l[ln][-1] != '\n':
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
210 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
211
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
212 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
213 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
214
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
215 return "".join(l)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
216
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
217 # creates a headerless unified diff
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
218 # t1 and t2 are the text to be diffed
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
219 # 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
220 def _unidiff(t1, t2, l1, l2, opts=defaultopts):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
221 def contextend(l, len):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
222 ret = l + opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
223 if ret > len:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
224 ret = len
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
225 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
226
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
227 def contextstart(l):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
228 ret = l - opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
229 if ret < 0:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
230 return 0
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
231 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
232
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
233 lastfunc = [0, '']
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
234 def yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
235 (astart, a2, bstart, b2, delta) = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
236 aend = contextend(a2, len(l1))
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
237 alen = aend - astart
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
238 blen = b2 - bstart + aend - a2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
239
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
240 func = ""
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
241 if opts.showfunc:
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
242 lastpos, func = lastfunc
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
243 # 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
244 # 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
245 # alphanumeric char.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
246 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
247 if l1[i][0].isalnum():
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
248 func = ' ' + l1[i].rstrip()[:40]
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
249 lastfunc[1] = func
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
250 break
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
251 # 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
252 # 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
253 # the file more than once.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
254 lastfunc[0] = astart
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
255
15462
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
256 # 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
257 if alen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
258 astart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
259 if blen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
260 bstart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
261
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
262 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
263 bstart, blen, func)
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
264 for x in delta:
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mason@suse.com
parents: 1540
diff changeset
265 yield x
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mason@suse.com
parents: 1540
diff changeset
266 for x in xrange(a2, aend):
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
267 yield ' ' + l1[x]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
268
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
269 # 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
270 # below finds the spaces between those matching sequences and translates
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
271 # them into diff output.
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
272 #
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
273 hunk = None
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
274 for s, stype in allblocks(t1, t2, opts, l1, l2):
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
275 if stype != '!':
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
276 continue
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
277 delta = []
15525
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
278 a1, a2, b1, b2 = s
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
279 old = l1[a1:a2]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
280 new = l2[b1:b2]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
281
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
282 astart = contextstart(a1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
283 bstart = contextstart(b1)
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
284 prev = None
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
285 if hunk:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
286 # 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
287 if astart < hunk[1] + opts.context + 1:
1637
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mason@suse.com
parents: 1540
diff changeset
288 prev = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
289 astart = hunk[1]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
290 bstart = hunk[3]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
291 else:
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
292 for x in yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
293 yield x
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
294 if prev:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
295 # 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
296 hunk[1] = a2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
297 hunk[3] = b2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
298 delta = hunk[4]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
299 else:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
300 # create a new hunk
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
301 hunk = [astart, a2, bstart, b2, delta]
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
302
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
303 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
304 delta[len(delta):] = ['-' + x for x in old]
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
305 delta[len(delta):] = ['+' + x for x in new]
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
306
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
307 if hunk:
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
308 for x in yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
309 yield x
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
310
120
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
311 def patchtext(bin):
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
312 pos = 0
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
313 t = []
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
314 while pos < len(bin):
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
315 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
316 pos += 12
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
317 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
318 pos += l
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
319 return "".join(t)
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
320
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
321 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
322 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
323 # skip over trivial delta header
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
324 return buffer(bin, 12)
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
325 return mpatch.patches(a, [bin])
432
3b9e3d3d2810 Start using bdiff for generating deltas
mpm@selenic.com
parents: 396
diff changeset
326
4361
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
327 # 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
328 def get_matching_blocks(a, b):
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
329 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
330
5367
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
331 def trivialdiffheader(length):
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
332 return struct.pack(">lll", 0, 0, length)
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
333
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
334 patches = mpatch.patches
2078
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1723
diff changeset
335 patchedsize = mpatch.patchedsize
432
3b9e3d3d2810 Start using bdiff for generating deltas
mpm@selenic.com
parents: 396
diff changeset
336 textdiff = bdiff.bdiff