annotate mercurial/mdiff.py @ 23717:d8663e6153c1

namespaces: use namespace object instead of dictionary This isn't as bad as the diff seems, it only looks like scary. In this patch, we use the 'namespace' object instead of accessing keys in a dictionary. This required the 'templatename' and 'names' method to change their implementation. Later, we will remove these functions entirely due to a better api.
author Sean Farley <sean.michael.farley@gmail.com>
date Fri, 19 Dec 2014 17:27:20 -0800
parents 1f510efcd5f3
children a5a06c9c7407
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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75840796e8e2 mdiff.py: kill #! line, add copyright notice
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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, 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 noprefix disables the 'a/' and 'b/' prefixes (ignored in plain mode)
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30 ignorews ignores all whitespace changes in the diff
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31 ignorewsamount ignores changes in the amount of whitespace
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32 ignoreblanklines ignores changes whose lines are all blank
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33 upgrade generates git diffs to avoid data loss
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34 '''
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35
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36 defaults = {
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37 'context': 3,
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38 'text': False,
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39 'showfunc': False,
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40 'git': False,
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41 'nodates': False,
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42 'nobinary': False,
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43 'noprefix': False,
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44 'ignorews': False,
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45 'ignorewsamount': False,
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46 'ignoreblanklines': False,
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47 'upgrade': False,
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48 }
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49
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50 __slots__ = defaults.keys()
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51
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52 def __init__(self, **opts):
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53 for k in self.__slots__:
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54 v = opts.get(k)
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55 if v is None:
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56 v = self.defaults[k]
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57 setattr(self, k, v)
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58
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59 try:
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60 self.context = int(self.context)
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61 except ValueError:
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62 raise util.Abort(_('diff context lines count must be '
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63 'an integer, not %r') % self.context)
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64
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65 def copy(self, **kwargs):
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66 opts = dict((k, getattr(self, k)) for k in self.defaults)
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67 opts.update(kwargs)
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68 return diffopts(**opts)
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69
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70 defaultopts = diffopts()
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71
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72 def wsclean(opts, text, blank=True):
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73 if opts.ignorews:
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74 text = bdiff.fixws(text, 1)
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75 elif opts.ignorewsamount:
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76 text = bdiff.fixws(text, 0)
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77 if blank and opts.ignoreblanklines:
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78 text = re.sub('\n+', '\n', text).strip('\n')
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79 return text
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80
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81 def splitblock(base1, lines1, base2, lines2, opts):
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82 # The input lines matches except for interwoven blank lines. We
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83 # transform it into a sequence of matching blocks and blank blocks.
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84 lines1 = [(wsclean(opts, l) and 1 or 0) for l in lines1]
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85 lines2 = [(wsclean(opts, l) and 1 or 0) for l in lines2]
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86 s1, e1 = 0, len(lines1)
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87 s2, e2 = 0, len(lines2)
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88 while s1 < e1 or s2 < e2:
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89 i1, i2, btype = s1, s2, '='
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90 if (i1 >= e1 or lines1[i1] == 0
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91 or i2 >= e2 or lines2[i2] == 0):
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92 # Consume the block of blank lines
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93 btype = '~'
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94 while i1 < e1 and lines1[i1] == 0:
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95 i1 += 1
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96 while i2 < e2 and lines2[i2] == 0:
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97 i2 += 1
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98 else:
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99 # Consume the matching lines
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100 while i1 < e1 and lines1[i1] == 1 and lines2[i2] == 1:
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101 i1 += 1
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102 i2 += 1
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103 yield [base1 + s1, base1 + i1, base2 + s2, base2 + i2], btype
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104 s1 = i1
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105 s2 = i2
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106
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107 def allblocks(text1, text2, opts=None, lines1=None, lines2=None, refine=False):
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108 """Return (block, type) tuples, where block is an mdiff.blocks
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109 line entry. type is '=' for blocks matching exactly one another
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110 (bdiff blocks), '!' for non-matching blocks and '~' for blocks
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111 matching only after having filtered blank lines. If refine is True,
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112 then '~' blocks are refined and are only made of blank lines.
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113 line1 and line2 are text1 and text2 split with splitnewlines() if
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114 they are already available.
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115 """
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116 if opts is None:
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117 opts = defaultopts
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118 if opts.ignorews or opts.ignorewsamount:
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119 text1 = wsclean(opts, text1, False)
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120 text2 = wsclean(opts, text2, False)
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121 diff = bdiff.blocks(text1, text2)
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122 for i, s1 in enumerate(diff):
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123 # The first match is special.
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124 # we've either found a match starting at line 0 or a match later
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125 # in the file. If it starts later, old and new below will both be
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126 # empty and we'll continue to the next match.
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127 if i > 0:
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128 s = diff[i - 1]
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
129 else:
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
130 s = [0, 0, 0, 0]
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
131 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
132
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
133 # 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
134 # 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
135 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
136 type = '!'
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
137 if opts.ignoreblanklines:
15529
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
138 if lines1 is None:
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
139 lines1 = splitnewlines(text1)
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
140 if lines2 is None:
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
141 lines2 = splitnewlines(text2)
b35cf47286a6 mdiff: split lines in allblocks() only when necessary
Patrick Mezard <pmezard@gmail.com>
parents: 15528
diff changeset
142 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
143 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
144 if old == new:
15526
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
145 type = '~'
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
146 yield s, type
e6519c628454 mdiff: make diffblocks() return all blocks, matching and changed
Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
147 yield s1, '='
15525
935bf2e7dbc5 mdiff: extract blocks whitespace normalization in diffblocks()
Patrick Mezard <pmezard@gmail.com>
parents: 15513
diff changeset
148
17940
c84ef0047a94 diff: unify calls to diffline
Guillermo Pérez <bisho@fb.com>
parents: 17939
diff changeset
149 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
150 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
151 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
152 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
153 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
154 return '\t\n'
826659bd8053 git patches: correct handling of filenames with spaces
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4361
diff changeset
155 return '\n'
3026
d838bfac668d Remove dates from git export file lines - they confuse git-apply
Brendan Cully <brendan@kublai.com>
parents: 2907
diff changeset
156
10282
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
157 if not a and not b:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
158 return ""
23299
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
159
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
160 if opts.noprefix:
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
161 aprefix = bprefix = ''
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
162 else:
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
163 aprefix = 'a/'
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
164 bprefix = 'b/'
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
165
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
166 epoch = util.datestr((0, 0))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
167
15437
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
168 fn1 = util.pconvert(fn1)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
169 fn2 = util.pconvert(fn2)
8f08b635cdce diff: always use / in paths in diff
Mads Kiilerich <mads@kiilerich.com>
parents: 15141
diff changeset
170
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
171 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
172 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
173 return ""
5482
e5eedd74e70f Use both the from and to name in mdiff.unidiff.
Dustin Sallings <dustin@spy.net>
parents: 5367
diff changeset
174 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
175 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
176 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
177 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
178 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
179 else:
23299
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
180 l1 = "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1))
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
181 l2 = "+++ %s%s" % (bprefix + fn2, datetag(bd, fn2))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
182 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
183 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
184 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
185 a = splitnewlines(a)
23299
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
186 l1 = "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1))
1723
fde8fb2cbede Fix diff against an empty file (issue124) and add a test for this.
Thomas Arendsen Hein <thomas@intevation.de>
parents: 1637
diff changeset
187 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
188 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
189 else:
23299
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
190 l2 = "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2))
264
4c1d7072d5cd Attempt to make diff deal with null sources properly
mpm@selenic.com
parents: 249
diff changeset
191 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
192 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
193 else:
2251
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
194 al = splitnewlines(a)
35fb62a3a673 fix speed regression in mdiff caused by line split bugfix.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2248
diff changeset
195 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
196 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
197 if not l:
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
198 return ""
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
199
23299
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
200 l.insert(0, "--- %s%s%s" % (aprefix, fn1, datetag(ad, fn1)))
1f510efcd5f3 mdiff.unidiff: add support for noprefix
Siddharth Agarwal <sid0@fb.com>
parents: 23294
diff changeset
201 l.insert(1, "+++ %s%s%s" % (bprefix, fn2, datetag(bd, fn2)))
170
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
202
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
203 for ln in xrange(len(l)):
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
204 if l[ln][-1] != '\n':
e6c621a825f2 hg diff: fix missing final newline bug
mpm@selenic.com
parents: 127
diff changeset
205 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
206
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
207 return "".join(l)
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
208
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
209 # creates a headerless unified diff
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
210 # t1 and t2 are the text to be diffed
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
211 # 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
212 def _unidiff(t1, t2, l1, l2, opts=defaultopts):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
213 def contextend(l, len):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
214 ret = l + opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
215 if ret > len:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
216 ret = len
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
217 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
218
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
219 def contextstart(l):
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
220 ret = l - opts.context
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
221 if ret < 0:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
222 return 0
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
223 return ret
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
224
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
225 lastfunc = [0, '']
10614
d0050f36e688 remove header handling out of mdiff.bunidiff, rename it
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 10282
diff changeset
226 def yieldhunk(hunk):
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
227 (astart, a2, bstart, b2, delta) = hunk
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
228 aend = contextend(a2, len(l1))
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
229 alen = aend - astart
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
230 blen = b2 - bstart + aend - a2
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
231
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
232 func = ""
2874
4ec58b157265 refactor text diff/patch code.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2859
diff changeset
233 if opts.showfunc:
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
234 lastpos, func = lastfunc
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
235 # 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
236 # 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
237 # alphanumeric char.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
238 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
239 if l1[i][0].isalnum():
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
240 func = ' ' + l1[i].rstrip()[:40]
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
241 lastfunc[1] = func
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
242 break
15141
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
243 # 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
244 # 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
245 # the file more than once.
16dc9a32ca04 mdiff: speed up showfunc for large diffs
Brodie Rao <brodie@bitheap.org>
parents: 12751
diff changeset
246 lastfunc[0] = astart
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
247
15462
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
248 # 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
249 if alen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
250 astart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
251 if blen:
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
252 bstart += 1
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
253
2b1ec74c961f mdiff/patch: fix bad hunk handling for unified diffs with zero context
Nicolas Venegas <nvenegas@atlassian.com>
parents: 15141
diff changeset
254 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
255 bstart, blen, func)
1637
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
256 for x in delta:
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
257 yield x
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
258 for x in xrange(a2, aend):
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
parents: 1540
diff changeset
259 yield ' ' + l1[x]
3b1b44b917f4 Add new bdiff based unidiff generation.
mason@suse.com
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260
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261 # bdiff.blocks gives us the matching sequences in the files. The loop
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262 # below finds the spaces between those matching sequences and translates
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263 # them into diff output.
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264 #
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265 hunk = None
16089
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
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266 ignoredlines = 0
15526
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Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
267 for s, stype in allblocks(t1, t2, opts, l1, l2):
16089
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
268 a1, a2, b1, b2 = s
15526
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Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
269 if stype != '!':
16089
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
270 if stype == '~':
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
271 # 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
272 # blank lines are ignored, the new lines offsets must
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
273 # be adjusted as if equivalent blocks ('~') had the
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
274 # same sizes on both sides.
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
275 ignoredlines += (b2 - b1) - (a2 - a1)
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Patrick Mezard <pmezard@gmail.com>
parents: 15525
diff changeset
276 continue
1637
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277 delta = []
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278 old = l1[a1:a2]
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279 new = l2[b1:b2]
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diff changeset
280
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Patrick Mezard <patrick@mezard.eu>
parents: 15657
diff changeset
281 b1 -= ignoredlines
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parents: 15657
diff changeset
282 b2 -= ignoredlines
1637
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283 astart = contextstart(a1)
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284 bstart = contextstart(b1)
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diff changeset
285 prev = None
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286 if hunk:
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parents: 1540
diff changeset
287 # 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
288 if astart < hunk[1] + opts.context + 1:
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289 prev = hunk
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290 astart = hunk[1]
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291 bstart = hunk[3]
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diff changeset
292 else:
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parents: 10282
diff changeset
293 for x in yieldhunk(hunk):
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294 yield x
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295 if prev:
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296 # we've joined the previous hunk, record the new ending points.
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297 hunk[1] = a2
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298 hunk[3] = b2
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299 delta = hunk[4]
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300 else:
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301 # create a new hunk
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parents: 10264
diff changeset
302 hunk = [astart, a2, bstart, b2, delta]
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diff changeset
303
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08a0f04b56bd many, many trivial check-code fixups
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parents: 10264
diff changeset
304 delta[len(delta):] = [' ' + x for x in l1[astart:a1]]
08a0f04b56bd many, many trivial check-code fixups
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parents: 10264
diff changeset
305 delta[len(delta):] = ['-' + x for x in old]
08a0f04b56bd many, many trivial check-code fixups
Matt Mackall <mpm@selenic.com>
parents: 10264
diff changeset
306 delta[len(delta):] = ['+' + x for x in new]
1637
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diff changeset
307
3b1b44b917f4 Add new bdiff based unidiff generation.
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diff changeset
308 if hunk:
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parents: 10282
diff changeset
309 for x in yieldhunk(hunk):
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diff changeset
310 yield x
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diff changeset
311
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
312 def b85diff(to, tn):
d587925680d9 diff: move b85diff to mdiff module
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diff changeset
313 '''print base85-encoded binary diff'''
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
314 def fmtline(line):
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
315 l = len(line)
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
316 if l <= 26:
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
317 l = chr(ord('A') + l - 1)
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
318 else:
d587925680d9 diff: move b85diff to mdiff module
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parents: 16362
diff changeset
319 l = chr(l - 26 + ord('a') - 1)
d587925680d9 diff: move b85diff to mdiff module
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parents: 16362
diff changeset
320 return '%c%s\n' % (l, base85.b85encode(line, True))
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
321
d587925680d9 diff: move b85diff to mdiff module
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parents: 16362
diff changeset
322 def chunk(text, csize=52):
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
323 l = len(text)
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
324 i = 0
d587925680d9 diff: move b85diff to mdiff module
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parents: 16362
diff changeset
325 while i < l:
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
326 yield text[i:i + csize]
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
327 i += csize
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
328
17946
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
329 if to is None:
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
330 to = ''
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
331 if tn is None:
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
332 tn = ''
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
333
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
334 if to == tn:
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
335 return ''
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
336
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
337 # TODO: deltas
17946
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
338 ret = []
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
339 ret.append('GIT binary patch\n')
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
340 ret.append('literal %s\n' % len(tn))
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
341 for l in chunk(zlib.compress(tn)):
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
342 ret.append(fmtline(l))
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
343 ret.append('\n')
17946
1e13b1184292 diff: move index header generation to patch
Guillermo Pérez <bisho@fb.com>
parents: 17941
diff changeset
344
17939
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
345 return ''.join(ret)
d587925680d9 diff: move b85diff to mdiff module
Guillermo Pérez <bisho at fb.com>
parents: 16362
diff changeset
346
120
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
347 def patchtext(bin):
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
348 pos = 0
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
349 t = []
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
350 while pos < len(bin):
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mpm@selenic.com
parents: 75
diff changeset
351 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
352 pos += 12
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
353 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
354 pos += l
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
355 return "".join(t)
bae6f0328f63 Add a function to return the new text from a binary diff
mpm@selenic.com
parents: 75
diff changeset
356
0
9117c6561b0b Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff changeset
357 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
358 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
359 # 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
360 return util.buffer(bin, 12)
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
361 return mpatch.patches(a, [bin])
432
3b9e3d3d2810 Start using bdiff for generating deltas
mpm@selenic.com
parents: 396
diff changeset
362
4361
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
363 # 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
364 def get_matching_blocks(a, b):
99c853a1408c add mdiff.get_matching_blocks
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4108
diff changeset
365 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
366
5367
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
367 def trivialdiffheader(length):
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
368 return struct.pack(">lll", 0, 0, length)
7530334bf301 revlog: generate trivial deltas against null revision
Matt Mackall <mpm@selenic.com>
parents: 4878
diff changeset
369
1379
8ee7ce877be2 Clean up mdiff imports
Matt Mackall <mpm@selenic.com>
parents: 1378
diff changeset
370 patches = mpatch.patches
2078
441ea218414e Fill in the uncompressed size during revlog.addgroup
mason@suse.com
parents: 1723
diff changeset
371 patchedsize = mpatch.patchedsize
432
3b9e3d3d2810 Start using bdiff for generating deltas
mpm@selenic.com
parents: 396
diff changeset
372 textdiff = bdiff.bdiff