Mercurial > hg
annotate mercurial/mdiff.py @ 23167:a3c2d9211294 stable
templater: don't overwrite the keyword mapping in runsymbol() (issue4362)
This keyword remapping was introduced in e06e9fd2d99f as part of converting
generator based iterators into list based iterators, mentioning "undesired
behavior in template" when a generator is exhausted, but doesn't say what and
introduces no tests.
The problem with the remapping was that it corrupted the output for keywords
like 'extras', 'file_copies' and 'file_copies_switch' in templates such as:
$ hg log -r 142b5d5ec9cc --template "{file_copies % ' File: {file_copy}\n'}"
File: mercurial/changelog.py (mercurial/hg.py)
File: mercurial/changelog.py (mercurial/hg.py)
File: mercurial/changelog.py (mercurial/hg.py)
File: mercurial/changelog.py (mercurial/hg.py)
File: mercurial/changelog.py (mercurial/hg.py)
File: mercurial/changelog.py (mercurial/hg.py)
File: mercurial/changelog.py (mercurial/hg.py)
File: mercurial/changelog.py (mercurial/hg.py)
What was happening was that in the first call to runtemplate() inside runmap(),
'lm' mapped the keyword (e.g. file_copies) to the appropriate showxxx() method.
On each subsequent call to runtemplate() in that loop however, the keyword was
mapped to a list of the first item's pieces, e.g.:
'file_copy': ['mercurial/changelog.py', ' (', 'mercurial/hg.py', ')']
Therefore, the dict for the second and any subsequent items were not processed
through the corresponding showxxx() method, and the first item's data was
reused.
The 'extras' keyword regressed in de7e6c489412, and 'file_copies' regressed in
0b241d7a8c62 for other reasons. The common thread of things fixed by this seems
to be when a list of dicts are passed to the templatekw._hybrid class.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Mon, 03 Nov 2014 12:08:03 -0500 |
parents | 3fbef7ac26f0 |
children | b89856abf4e2 |
rev | line source |
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1 # mdiff.py - diff and patch routines for mercurial |
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2 # |
2859 | 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 |
10263 | 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 |
2907 | 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, |
2907 | 38 'git': False, |
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39 'nodates': False, |
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40 'nobinary': False, |
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41 'ignorews': False, |
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42 'ignorewsamount': False, |
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43 'ignoreblanklines': False, |
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44 'upgrade': False, |
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45 } |
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46 |
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47 __slots__ = defaults.keys() |
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48 |
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49 def __init__(self, **opts): |
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50 for k in self.__slots__: |
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51 v = opts.get(k) |
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52 if v is None: |
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53 v = self.defaults[k] |
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54 setattr(self, k, v) |
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55 |
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56 try: |
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57 self.context = int(self.context) |
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58 except ValueError: |
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59 raise util.Abort(_('diff context lines count must be ' |
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60 'an integer, not %r') % self.context) |
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61 |
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62 def copy(self, **kwargs): |
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63 opts = dict((k, getattr(self, k)) for k in self.defaults) |
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64 opts.update(kwargs) |
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65 return diffopts(**opts) |
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66 |
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67 defaultopts = diffopts() |
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68 |
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69 def wsclean(opts, text, blank=True): |
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70 if opts.ignorews: |
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71 text = bdiff.fixws(text, 1) |
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72 elif opts.ignorewsamount: |
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73 text = bdiff.fixws(text, 0) |
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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 opts.ignorews or opts.ignorewsamount: |
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116 text1 = wsclean(opts, text1, False) |
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117 text2 = wsclean(opts, text2, False) |
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118 diff = bdiff.blocks(text1, text2) |
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119 for i, s1 in enumerate(diff): |
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120 # The first match is special. |
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121 # we've either found a match starting at line 0 or a match later |
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122 # in the file. If it starts later, old and new below will both be |
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123 # empty and we'll continue to the next match. |
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124 if i > 0: |
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125 s = diff[i - 1] |
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126 else: |
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127 s = [0, 0, 0, 0] |
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128 s = [s[1], s1[0], s[3], s1[2]] |
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129 |
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130 # bdiff sometimes gives huge matches past eof, this check eats them, |
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131 # and deals with the special first match case described above |
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132 if s[0] != s[1] or s[2] != s[3]: |
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133 type = '!' |
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134 if opts.ignoreblanklines: |
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135 if lines1 is None: |
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136 lines1 = splitnewlines(text1) |
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137 if lines2 is None: |
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138 lines2 = splitnewlines(text2) |
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139 old = wsclean(opts, "".join(lines1[s[0]:s[1]])) |
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140 new = wsclean(opts, "".join(lines2[s[2]:s[3]])) |
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141 if old == new: |
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142 type = '~' |
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143 yield s, type |
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144 yield s1, '=' |
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145 |
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146 def unidiff(a, ad, b, bd, fn1, fn2, opts=defaultopts): |
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147 def datetag(date, fn=None): |
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148 if not opts.git and not opts.nodates: |
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149 return '\t%s\n' % date |
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150 if fn and ' ' in fn: |
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151 return '\t\n' |
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152 return '\n' |
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153 |
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154 if not a and not b: |
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155 return "" |
1379 | 156 epoch = util.datestr((0, 0)) |
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157 |
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158 fn1 = util.pconvert(fn1) |
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159 fn2 = util.pconvert(fn2) |
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160 |
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161 if not opts.text and (util.binary(a) or util.binary(b)): |
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162 if a and b and len(a) == len(b) and a == b: |
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163 return "" |
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164 l = ['Binary file %s has changed\n' % fn1] |
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165 elif not a: |
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166 b = splitnewlines(b) |
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167 if a is None: |
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168 l1 = '--- /dev/null%s' % datetag(epoch) |
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169 else: |
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170 l1 = "--- %s%s" % ("a/" + fn1, datetag(ad, fn1)) |
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171 l2 = "+++ %s%s" % ("b/" + fn2, datetag(bd, fn2)) |
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172 l3 = "@@ -0,0 +1,%d @@\n" % len(b) |
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173 l = [l1, l2, l3] + ["+" + e for e in b] |
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174 elif not b: |
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175 a = splitnewlines(a) |
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176 l1 = "--- %s%s" % ("a/" + fn1, datetag(ad, fn1)) |
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177 if b is None: |
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178 l2 = '+++ /dev/null%s' % datetag(epoch) |
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179 else: |
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180 l2 = "+++ %s%s" % ("b/" + fn2, datetag(bd, fn2)) |
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181 l3 = "@@ -1,%d +0,0 @@\n" % len(a) |
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182 l = [l1, l2, l3] + ["-" + e for e in a] |
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183 else: |
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184 al = splitnewlines(a) |
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185 bl = splitnewlines(b) |
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186 l = list(_unidiff(a, b, al, bl, opts=opts)) |
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187 if not l: |
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188 return "" |
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189 |
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190 l.insert(0, "--- a/%s%s" % (fn1, datetag(ad, fn1))) |
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191 l.insert(1, "+++ b/%s%s" % (fn2, datetag(bd, fn2))) |
170 | 192 |
193 for ln in xrange(len(l)): | |
194 if l[ln][-1] != '\n': | |
195 l[ln] += "\n\ No newline at end of file\n" | |
196 | |
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197 return "".join(l) |
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198 |
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199 # creates a headerless unified diff |
1637 | 200 # t1 and t2 are the text to be diffed |
201 # l1 and l2 are the text broken up into lines | |
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202 def _unidiff(t1, t2, l1, l2, opts=defaultopts): |
1637 | 203 def contextend(l, len): |
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204 ret = l + opts.context |
1637 | 205 if ret > len: |
206 ret = len | |
207 return ret | |
208 | |
209 def contextstart(l): | |
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210 ret = l - opts.context |
1637 | 211 if ret < 0: |
212 return 0 | |
213 return ret | |
214 | |
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215 lastfunc = [0, ''] |
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216 def yieldhunk(hunk): |
1637 | 217 (astart, a2, bstart, b2, delta) = hunk |
218 aend = contextend(a2, len(l1)) | |
219 alen = aend - astart | |
220 blen = b2 - bstart + aend - a2 | |
221 | |
222 func = "" | |
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223 if opts.showfunc: |
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224 lastpos, func = lastfunc |
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225 # walk backwards from the start of the context up to the start of |
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226 # the previous hunk context until we find a line starting with an |
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227 # alphanumeric char. |
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228 for i in xrange(astart - 1, lastpos - 1, -1): |
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229 if l1[i][0].isalnum(): |
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230 func = ' ' + l1[i].rstrip()[:40] |
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231 lastfunc[1] = func |
1637 | 232 break |
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233 # by recording this hunk's starting point as the next place to |
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234 # start looking for function lines, we avoid reading any line in |
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235 # the file more than once. |
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236 lastfunc[0] = astart |
1637 | 237 |
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238 # zero-length hunk ranges report their start line as one less |
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239 if alen: |
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240 astart += 1 |
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241 if blen: |
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242 bstart += 1 |
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243 |
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244 yield "@@ -%d,%d +%d,%d @@%s\n" % (astart, alen, |
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245 bstart, blen, func) |
1637 | 246 for x in delta: |
247 yield x | |
248 for x in xrange(a2, aend): | |
249 yield ' ' + l1[x] | |
250 | |
251 # bdiff.blocks gives us the matching sequences in the files. The loop | |
252 # below finds the spaces between those matching sequences and translates | |
253 # them into diff output. | |
254 # | |
255 hunk = None | |
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256 ignoredlines = 0 |
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257 for s, stype in allblocks(t1, t2, opts, l1, l2): |
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258 a1, a2, b1, b2 = s |
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259 if stype != '!': |
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260 if stype == '~': |
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261 # The diff context lines are based on t1 content. When |
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262 # blank lines are ignored, the new lines offsets must |
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263 # be adjusted as if equivalent blocks ('~') had the |
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264 # same sizes on both sides. |
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265 ignoredlines += (b2 - b1) - (a2 - a1) |
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266 continue |
1637 | 267 delta = [] |
268 old = l1[a1:a2] | |
269 new = l2[b1:b2] | |
270 | |
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271 b1 -= ignoredlines |
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272 b2 -= ignoredlines |
1637 | 273 astart = contextstart(a1) |
274 bstart = contextstart(b1) | |
275 prev = None | |
276 if hunk: | |
277 # join with the previous hunk if it falls inside the context | |
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278 if astart < hunk[1] + opts.context + 1: |
1637 | 279 prev = hunk |
280 astart = hunk[1] | |
281 bstart = hunk[3] | |
282 else: | |
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283 for x in yieldhunk(hunk): |
1637 | 284 yield x |
285 if prev: | |
286 # we've joined the previous hunk, record the new ending points. | |
287 hunk[1] = a2 | |
288 hunk[3] = b2 | |
289 delta = hunk[4] | |
290 else: | |
291 # create a new hunk | |
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292 hunk = [astart, a2, bstart, b2, delta] |
1637 | 293 |
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294 delta[len(delta):] = [' ' + x for x in l1[astart:a1]] |
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295 delta[len(delta):] = ['-' + x for x in old] |
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296 delta[len(delta):] = ['+' + x for x in new] |
1637 | 297 |
298 if hunk: | |
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299 for x in yieldhunk(hunk): |
1637 | 300 yield x |
301 | |
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302 def b85diff(to, tn): |
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303 '''print base85-encoded binary diff''' |
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304 def fmtline(line): |
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305 l = len(line) |
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306 if l <= 26: |
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307 l = chr(ord('A') + l - 1) |
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308 else: |
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309 l = chr(l - 26 + ord('a') - 1) |
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310 return '%c%s\n' % (l, base85.b85encode(line, True)) |
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311 |
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312 def chunk(text, csize=52): |
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313 l = len(text) |
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314 i = 0 |
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315 while i < l: |
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316 yield text[i:i + csize] |
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317 i += csize |
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318 |
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319 if to is None: |
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320 to = '' |
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321 if tn is None: |
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322 tn = '' |
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323 |
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324 if to == tn: |
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325 return '' |
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326 |
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327 # TODO: deltas |
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328 ret = [] |
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329 ret.append('GIT binary patch\n') |
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330 ret.append('literal %s\n' % len(tn)) |
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331 for l in chunk(zlib.compress(tn)): |
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332 ret.append(fmtline(l)) |
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333 ret.append('\n') |
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334 |
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335 return ''.join(ret) |
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336 |
120
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337 def patchtext(bin): |
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338 pos = 0 |
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339 t = [] |
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340 while pos < len(bin): |
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341 p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12]) |
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342 pos += 12 |
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343 t.append(bin[pos:pos + l]) |
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344 pos += l |
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345 return "".join(t) |
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346 |
0
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347 def patch(a, bin): |
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348 if len(a) == 0: |
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349 # skip over trivial delta header |
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350 return util.buffer(bin, 12) |
1379 | 351 return mpatch.patches(a, [bin]) |
432 | 352 |
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353 # similar to difflib.SequenceMatcher.get_matching_blocks |
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354 def get_matching_blocks(a, b): |
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355 return [(d[0], d[2], d[1] - d[0]) for d in bdiff.blocks(a, b)] |
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356 |
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357 def trivialdiffheader(length): |
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358 return struct.pack(">lll", 0, 0, length) |
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359 |
1379 | 360 patches = mpatch.patches |
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361 patchedsize = mpatch.patchedsize |
432 | 362 textdiff = bdiff.bdiff |