Mercurial > hg
annotate mercurial/manifest.py @ 26755:bb0b955d050d
streamclone: support for producing and consuming stream clone bundles
Up to this point, stream clones only existed as a dynamically generated
data format produced and consumed during streaming clones. In order to
support this efficient cloning format with the clone bundles feature, we
need a more formal, on disk representation of the streaming clone data.
This patch introduces a new "bundle" type for streaming clones. Unlike
existing bundles, it does not contain changegroup data. It does,
however, share the same concepts like the 4 byte header which identifies
the type of data that follows and the 2 byte abbreviation for
compression types (of which only "UN" is currently supported).
The new bundle format is essentially the existing stream clone version 1
data format with some headers at the beginning.
Content negotiation at stream clone request time checked for repository
format/requirements compatibility before initiating a stream clone. We
can't do active content negotiation when using clone bundles. So, we put
this set of requirements inside the payload so consumers have a built-in
mechanism for checking compatibility before reading and applying lots of
data. Of course, we will also advertise this requirements set in clone
bundles. But that's for another patch.
We currently don't have a mechanism to produce and consume this new
bundle format. This will be implemented in upcoming patches.
It's worth noting that if a legacy client attempts to `hg unbundle` a
stream clone bundle (with the "HGS1" header), it will abort with:
"unknown bundle version S1," which seems appropriate.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 17 Oct 2015 11:14:52 -0700 |
parents | 05871262acd5 |
children | 1cbf144fd8a1 |
rev | line source |
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1089 | 1 # manifest.py - manifest revision class for mercurial |
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2 # |
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3 # Copyright 2005-2007 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 |
3891 | 8 from i18n import _ |
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9 import mdiff, parsers, error, revlog, util |
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10 import array, struct |
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11 import os |
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12 import heapq |
79 | 13 |
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14 propertycache = util.propertycache |
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15 |
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16 def _parsev1(data): |
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17 # This method does a little bit of excessive-looking |
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18 # precondition checking. This is so that the behavior of this |
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19 # class exactly matches its C counterpart to try and help |
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20 # prevent surprise breakage for anyone that develops against |
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21 # the pure version. |
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22 if data and data[-1] != '\n': |
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23 raise ValueError('Manifest did not end in a newline.') |
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24 prev = None |
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25 for l in data.splitlines(): |
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26 if prev is not None and prev > l: |
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27 raise ValueError('Manifest lines not in sorted order.') |
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28 prev = l |
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29 f, n = l.split('\0') |
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30 if len(n) > 40: |
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31 yield f, revlog.bin(n[:40]), n[40:] |
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32 else: |
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33 yield f, revlog.bin(n), '' |
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34 |
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35 def _parsev2(data): |
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36 metadataend = data.find('\n') |
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37 # Just ignore metadata for now |
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38 pos = metadataend + 1 |
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39 prevf = '' |
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40 while pos < len(data): |
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41 end = data.find('\n', pos + 1) # +1 to skip stem length byte |
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42 if end == -1: |
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43 raise ValueError('Manifest ended with incomplete file entry.') |
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44 stemlen = ord(data[pos]) |
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45 items = data[pos + 1:end].split('\0') |
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46 f = prevf[:stemlen] + items[0] |
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47 if prevf > f: |
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48 raise ValueError('Manifest entries not in sorted order.') |
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49 fl = items[1] |
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50 # Just ignore metadata (items[2:] for now) |
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51 n = data[end + 1:end + 21] |
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52 yield f, n, fl |
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53 pos = end + 22 |
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54 prevf = f |
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55 |
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56 def _parse(data): |
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57 """Generates (path, node, flags) tuples from a manifest text""" |
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58 if data.startswith('\0'): |
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59 return iter(_parsev2(data)) |
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60 else: |
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61 return iter(_parsev1(data)) |
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62 |
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63 def _text(it, usemanifestv2): |
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64 """Given an iterator over (path, node, flags) tuples, returns a manifest |
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65 text""" |
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66 if usemanifestv2: |
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67 return _textv2(it) |
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68 else: |
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69 return _textv1(it) |
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70 |
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71 def _textv1(it): |
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72 files = [] |
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73 lines = [] |
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74 _hex = revlog.hex |
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75 for f, n, fl in it: |
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76 files.append(f) |
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77 # if this is changed to support newlines in filenames, |
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78 # be sure to check the templates/ dir again (especially *-raw.tmpl) |
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79 lines.append("%s\0%s%s\n" % (f, _hex(n), fl)) |
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80 |
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81 _checkforbidden(files) |
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82 return ''.join(lines) |
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83 |
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84 def _textv2(it): |
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85 files = [] |
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86 lines = ['\0\n'] |
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87 prevf = '' |
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88 for f, n, fl in it: |
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89 files.append(f) |
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90 stem = os.path.commonprefix([prevf, f]) |
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91 stemlen = min(len(stem), 255) |
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92 lines.append("%c%s\0%s\n%s\n" % (stemlen, f[stemlen:], fl, n)) |
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93 prevf = f |
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94 _checkforbidden(files) |
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95 return ''.join(lines) |
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96 |
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97 class _lazymanifest(dict): |
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98 """This is the pure implementation of lazymanifest. |
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99 |
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100 It has not been optimized *at all* and is not lazy. |
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101 """ |
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102 |
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103 def __init__(self, data): |
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104 dict.__init__(self) |
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105 for f, n, fl in _parse(data): |
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106 self[f] = n, fl |
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107 |
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108 def __setitem__(self, k, v): |
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109 node, flag = v |
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110 assert node is not None |
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111 if len(node) > 21: |
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112 node = node[:21] # match c implementation behavior |
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113 dict.__setitem__(self, k, (node, flag)) |
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114 |
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115 def __iter__(self): |
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116 return iter(sorted(dict.keys(self))) |
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117 |
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118 def iterkeys(self): |
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119 return iter(sorted(dict.keys(self))) |
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120 |
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121 def iterentries(self): |
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122 return ((f, e[0], e[1]) for f, e in sorted(self.iteritems())) |
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123 |
2831 | 124 def copy(self): |
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125 c = _lazymanifest('') |
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126 c.update(self) |
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127 return c |
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128 |
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129 def diff(self, m2, clean=False): |
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130 '''Finds changes between the current manifest and m2.''' |
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131 diff = {} |
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132 |
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133 for fn, e1 in self.iteritems(): |
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134 if fn not in m2: |
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135 diff[fn] = e1, (None, '') |
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136 else: |
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137 e2 = m2[fn] |
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138 if e1 != e2: |
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139 diff[fn] = e1, e2 |
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140 elif clean: |
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141 diff[fn] = None |
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142 |
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143 for fn, e2 in m2.iteritems(): |
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144 if fn not in self: |
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145 diff[fn] = (None, ''), e2 |
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146 |
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147 return diff |
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148 |
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149 def filtercopy(self, filterfn): |
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150 c = _lazymanifest('') |
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151 for f, n, fl in self.iterentries(): |
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152 if filterfn(f): |
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153 c[f] = n, fl |
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154 return c |
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155 |
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156 def text(self): |
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157 """Get the full data of this manifest as a bytestring.""" |
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158 return _textv1(self.iterentries()) |
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159 |
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160 try: |
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161 _lazymanifest = parsers.lazymanifest |
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162 except AttributeError: |
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163 pass |
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164 |
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165 class manifestdict(object): |
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166 def __init__(self, data=''): |
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167 if data.startswith('\0'): |
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168 #_lazymanifest can not parse v2 |
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169 self._lm = _lazymanifest('') |
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170 for f, n, fl in _parsev2(data): |
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171 self._lm[f] = n, fl |
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172 else: |
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173 self._lm = _lazymanifest(data) |
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174 |
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175 def __getitem__(self, key): |
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176 return self._lm[key][0] |
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177 |
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178 def find(self, key): |
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179 return self._lm[key] |
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180 |
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181 def __len__(self): |
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182 return len(self._lm) |
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183 |
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184 def __setitem__(self, key, node): |
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185 self._lm[key] = node, self.flags(key, '') |
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186 |
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187 def __contains__(self, key): |
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188 return key in self._lm |
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189 |
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190 def __delitem__(self, key): |
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191 del self._lm[key] |
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192 |
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193 def __iter__(self): |
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194 return self._lm.__iter__() |
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195 |
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196 def iterkeys(self): |
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197 return self._lm.iterkeys() |
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198 |
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199 def keys(self): |
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200 return list(self.iterkeys()) |
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201 |
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202 def filesnotin(self, m2): |
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203 '''Set of files in this manifest that are not in the other''' |
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204 files = set(self) |
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205 files.difference_update(m2) |
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206 return files |
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207 |
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208 @propertycache |
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209 def _dirs(self): |
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210 return util.dirs(self) |
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211 |
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212 def dirs(self): |
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213 return self._dirs |
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214 |
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215 def hasdir(self, dir): |
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216 return dir in self._dirs |
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217 |
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218 def _filesfastpath(self, match): |
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219 '''Checks whether we can correctly and quickly iterate over matcher |
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220 files instead of over manifest files.''' |
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221 files = match.files() |
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222 return (len(files) < 100 and (match.isexact() or |
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223 (match.prefix() and all(fn in self for fn in files)))) |
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224 |
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225 def walk(self, match): |
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226 '''Generates matching file names. |
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227 |
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228 Equivalent to manifest.matches(match).iterkeys(), but without creating |
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229 an entirely new manifest. |
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230 |
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231 It also reports nonexistent files by marking them bad with match.bad(). |
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232 ''' |
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233 if match.always(): |
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234 for f in iter(self): |
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235 yield f |
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236 return |
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237 |
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238 fset = set(match.files()) |
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239 |
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240 # avoid the entire walk if we're only looking for specific files |
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241 if self._filesfastpath(match): |
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242 for fn in sorted(fset): |
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243 yield fn |
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244 return |
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245 |
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246 for fn in self: |
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247 if fn in fset: |
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248 # specified pattern is the exact name |
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249 fset.remove(fn) |
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250 if match(fn): |
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251 yield fn |
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252 |
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253 # for dirstate.walk, files=['.'] means "walk the whole tree". |
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254 # follow that here, too |
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255 fset.discard('.') |
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256 |
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257 for fn in sorted(fset): |
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258 if not self.hasdir(fn): |
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259 match.bad(fn, None) |
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260 |
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261 def matches(self, match): |
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262 '''generate a new manifest filtered by the match argument''' |
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263 if match.always(): |
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264 return self.copy() |
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265 |
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266 if self._filesfastpath(match): |
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267 m = manifestdict() |
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268 lm = self._lm |
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269 for fn in match.files(): |
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270 if fn in lm: |
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271 m._lm[fn] = lm[fn] |
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272 return m |
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273 |
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274 m = manifestdict() |
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275 m._lm = self._lm.filtercopy(match) |
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276 return m |
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277 |
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278 def diff(self, m2, clean=False): |
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279 '''Finds changes between the current manifest and m2. |
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280 |
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281 Args: |
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282 m2: the manifest to which this manifest should be compared. |
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283 clean: if true, include files unchanged between these manifests |
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284 with a None value in the returned dictionary. |
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285 |
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286 The result is returned as a dict with filename as key and |
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287 values of the form ((n1,fl1),(n2,fl2)), where n1/n2 is the |
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288 nodeid in the current/other manifest and fl1/fl2 is the flag |
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289 in the current/other manifest. Where the file does not exist, |
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290 the nodeid will be None and the flags will be the empty |
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291 string. |
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292 ''' |
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293 return self._lm.diff(m2._lm, clean) |
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294 |
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295 def setflag(self, key, flag): |
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296 self._lm[key] = self[key], flag |
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297 |
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298 def get(self, key, default=None): |
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299 try: |
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300 return self._lm[key][0] |
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301 except KeyError: |
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302 return default |
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303 |
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304 def flags(self, key, default=''): |
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305 try: |
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306 return self._lm[key][1] |
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307 except KeyError: |
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308 return default |
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309 |
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310 def copy(self): |
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311 c = manifestdict() |
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312 c._lm = self._lm.copy() |
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313 return c |
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314 |
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315 def iteritems(self): |
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316 return (x[:2] for x in self._lm.iterentries()) |
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318 def text(self, usemanifestv2=False): |
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319 if usemanifestv2: |
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320 return _textv2(self._lm.iterentries()) |
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321 else: |
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322 # use (probably) native version for v1 |
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323 return self._lm.text() |
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324 |
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325 def fastdelta(self, base, changes): |
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326 """Given a base manifest text as an array.array and a list of changes |
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327 relative to that text, compute a delta that can be used by revlog. |
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328 """ |
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329 delta = [] |
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330 dstart = None |
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331 dend = None |
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332 dline = [""] |
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333 start = 0 |
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334 # zero copy representation of base as a buffer |
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335 addbuf = util.buffer(base) |
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336 |
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337 # start with a readonly loop that finds the offset of |
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338 # each line and creates the deltas |
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339 for f, todelete in changes: |
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340 # bs will either be the index of the item or the insert point |
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341 start, end = _msearch(addbuf, f, start) |
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342 if not todelete: |
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343 h, fl = self._lm[f] |
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344 l = "%s\0%s%s\n" % (f, revlog.hex(h), fl) |
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345 else: |
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346 if start == end: |
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347 # item we want to delete was not found, error out |
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348 raise AssertionError( |
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349 _("failed to remove %s from manifest") % f) |
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350 l = "" |
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351 if dstart is not None and dstart <= start and dend >= start: |
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352 if dend < end: |
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353 dend = end |
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354 if l: |
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355 dline.append(l) |
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356 else: |
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357 if dstart is not None: |
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358 delta.append([dstart, dend, "".join(dline)]) |
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359 dstart = start |
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360 dend = end |
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361 dline = [l] |
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362 |
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363 if dstart is not None: |
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364 delta.append([dstart, dend, "".join(dline)]) |
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365 # apply the delta to the base, and get a delta for addrevision |
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366 deltatext, arraytext = _addlistdelta(base, delta) |
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367 return arraytext, deltatext |
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368 |
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369 def _msearch(m, s, lo=0, hi=None): |
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370 '''return a tuple (start, end) that says where to find s within m. |
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371 |
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372 If the string is found m[start:end] are the line containing |
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373 that string. If start == end the string was not found and |
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374 they indicate the proper sorted insertion point. |
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375 |
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376 m should be a buffer or a string |
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377 s is a string''' |
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378 def advance(i, c): |
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379 while i < lenm and m[i] != c: |
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380 i += 1 |
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381 return i |
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382 if not s: |
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383 return (lo, lo) |
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384 lenm = len(m) |
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385 if not hi: |
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386 hi = lenm |
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387 while lo < hi: |
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388 mid = (lo + hi) // 2 |
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389 start = mid |
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390 while start > 0 and m[start - 1] != '\n': |
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391 start -= 1 |
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392 end = advance(start, '\0') |
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393 if m[start:end] < s: |
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394 # we know that after the null there are 40 bytes of sha1 |
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395 # this translates to the bisect lo = mid + 1 |
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396 lo = advance(end + 40, '\n') + 1 |
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397 else: |
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398 # this translates to the bisect hi = mid |
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399 hi = start |
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400 end = advance(lo, '\0') |
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401 found = m[lo:end] |
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402 if s == found: |
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403 # we know that after the null there are 40 bytes of sha1 |
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404 end = advance(end + 40, '\n') |
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405 return (lo, end + 1) |
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406 else: |
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407 return (lo, lo) |
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408 |
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409 def _checkforbidden(l): |
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410 """Check filenames for illegal characters.""" |
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411 for f in l: |
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412 if '\n' in f or '\r' in f: |
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413 raise error.RevlogError( |
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414 _("'\\n' and '\\r' disallowed in filenames: %r") % f) |
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415 |
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416 |
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417 # apply the changes collected during the bisect loop to our addlist |
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418 # return a delta suitable for addrevision |
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419 def _addlistdelta(addlist, x): |
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420 # for large addlist arrays, building a new array is cheaper |
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421 # than repeatedly modifying the existing one |
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422 currentposition = 0 |
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423 newaddlist = array.array('c') |
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424 |
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425 for start, end, content in x: |
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426 newaddlist += addlist[currentposition:start] |
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427 if content: |
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428 newaddlist += array.array('c', content) |
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429 |
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430 currentposition = end |
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431 |
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432 newaddlist += addlist[currentposition:] |
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433 |
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434 deltatext = "".join(struct.pack(">lll", start, end, len(content)) |
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435 + content for start, end, content in x) |
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436 return deltatext, newaddlist |
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437 |
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438 def _splittopdir(f): |
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439 if '/' in f: |
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440 dir, subpath = f.split('/', 1) |
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441 return dir + '/', subpath |
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442 else: |
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443 return '', f |
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444 |
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445 _noop = lambda s: None |
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446 |
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447 class treemanifest(object): |
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448 def __init__(self, dir='', text=''): |
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449 self._dir = dir |
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450 self._node = revlog.nullid |
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451 self._loadfunc = _noop |
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452 self._copyfunc = _noop |
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453 self._dirty = False |
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454 self._dirs = {} |
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455 # Using _lazymanifest here is a little slower than plain old dicts |
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456 self._files = {} |
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457 self._flags = {} |
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458 if text: |
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459 def readsubtree(subdir, subm): |
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460 raise AssertionError('treemanifest constructor only accepts ' |
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461 'flat manifests') |
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462 self.parse(text, readsubtree) |
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463 self._dirty = True # Mark flat manifest dirty after parsing |
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464 |
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465 def _subpath(self, path): |
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466 return self._dir + path |
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467 |
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468 def __len__(self): |
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469 self._load() |
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470 size = len(self._files) |
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471 for m in self._dirs.values(): |
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472 size += m.__len__() |
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473 return size |
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474 |
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475 def _isempty(self): |
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476 self._load() # for consistency; already loaded by all callers |
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477 return (not self._files and (not self._dirs or |
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478 all(m._isempty() for m in self._dirs.values()))) |
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479 |
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480 def __repr__(self): |
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481 return ('<treemanifest dir=%s, node=%s, loaded=%s, dirty=%s at 0x%x>' % |
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482 (self._dir, revlog.hex(self._node), |
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483 bool(self._loadfunc is _noop), |
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484 self._dirty, id(self))) |
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485 |
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486 def dir(self): |
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487 '''The directory that this tree manifest represents, including a |
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488 trailing '/'. Empty string for the repo root directory.''' |
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489 return self._dir |
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490 |
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491 def node(self): |
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492 '''This node of this instance. nullid for unsaved instances. Should |
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493 be updated when the instance is read or written from a revlog. |
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494 ''' |
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495 assert not self._dirty |
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496 return self._node |
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497 |
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498 def setnode(self, node): |
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499 self._node = node |
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500 self._dirty = False |
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501 |
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502 def iteritems(self): |
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503 self._load() |
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504 for p, n in sorted(self._dirs.items() + self._files.items()): |
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505 if p in self._files: |
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506 yield self._subpath(p), n |
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507 else: |
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508 for f, sn in n.iteritems(): |
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509 yield f, sn |
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510 |
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511 def iterkeys(self): |
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512 self._load() |
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513 for p in sorted(self._dirs.keys() + self._files.keys()): |
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514 if p in self._files: |
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515 yield self._subpath(p) |
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516 else: |
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517 for f in self._dirs[p].iterkeys(): |
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518 yield f |
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519 |
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520 def keys(self): |
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521 return list(self.iterkeys()) |
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522 |
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523 def __iter__(self): |
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524 return self.iterkeys() |
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|
525 |
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526 def __contains__(self, f): |
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527 if f is None: |
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528 return False |
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529 self._load() |
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530 dir, subpath = _splittopdir(f) |
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531 if dir: |
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532 if dir not in self._dirs: |
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533 return False |
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|
534 return self._dirs[dir].__contains__(subpath) |
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535 else: |
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536 return f in self._files |
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|
537 |
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|
538 def get(self, f, default=None): |
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539 self._load() |
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540 dir, subpath = _splittopdir(f) |
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|
541 if dir: |
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542 if dir not in self._dirs: |
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|
543 return default |
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544 return self._dirs[dir].get(subpath, default) |
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|
545 else: |
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|
546 return self._files.get(f, default) |
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|
547 |
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|
548 def __getitem__(self, f): |
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549 self._load() |
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550 dir, subpath = _splittopdir(f) |
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|
551 if dir: |
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|
552 return self._dirs[dir].__getitem__(subpath) |
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553 else: |
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|
554 return self._files[f] |
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|
555 |
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556 def flags(self, f): |
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|
557 self._load() |
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558 dir, subpath = _splittopdir(f) |
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|
559 if dir: |
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|
560 if dir not in self._dirs: |
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|
561 return '' |
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562 return self._dirs[dir].flags(subpath) |
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|
563 else: |
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|
564 if f in self._dirs: |
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|
565 return '' |
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|
566 return self._flags.get(f, '') |
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|
567 |
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|
568 def find(self, f): |
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|
569 self._load() |
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570 dir, subpath = _splittopdir(f) |
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|
571 if dir: |
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|
572 return self._dirs[dir].find(subpath) |
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573 else: |
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574 return self._files[f], self._flags.get(f, '') |
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|
575 |
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|
576 def __delitem__(self, f): |
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577 self._load() |
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578 dir, subpath = _splittopdir(f) |
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|
579 if dir: |
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580 self._dirs[dir].__delitem__(subpath) |
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|
581 # If the directory is now empty, remove it |
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|
582 if self._dirs[dir]._isempty(): |
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|
583 del self._dirs[dir] |
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|
584 else: |
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585 del self._files[f] |
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586 if f in self._flags: |
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587 del self._flags[f] |
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588 self._dirty = True |
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589 |
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590 def __setitem__(self, f, n): |
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591 assert n is not None |
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592 self._load() |
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593 dir, subpath = _splittopdir(f) |
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594 if dir: |
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595 if dir not in self._dirs: |
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596 self._dirs[dir] = treemanifest(self._subpath(dir)) |
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597 self._dirs[dir].__setitem__(subpath, n) |
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598 else: |
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599 self._files[f] = n[:21] # to match manifestdict's behavior |
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600 self._dirty = True |
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601 |
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602 def _load(self): |
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603 if self._loadfunc is not _noop: |
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604 lf, self._loadfunc = self._loadfunc, _noop |
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605 lf(self) |
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606 elif self._copyfunc is not _noop: |
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607 cf, self._copyfunc = self._copyfunc, _noop |
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608 cf(self) |
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609 |
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610 def setflag(self, f, flags): |
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611 """Set the flags (symlink, executable) for path f.""" |
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612 assert 'd' not in flags |
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613 self._load() |
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614 dir, subpath = _splittopdir(f) |
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615 if dir: |
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616 if dir not in self._dirs: |
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617 self._dirs[dir] = treemanifest(self._subpath(dir)) |
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618 self._dirs[dir].setflag(subpath, flags) |
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619 else: |
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620 self._flags[f] = flags |
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621 self._dirty = True |
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622 |
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623 def copy(self): |
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624 copy = treemanifest(self._dir) |
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625 copy._node = self._node |
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626 copy._dirty = self._dirty |
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627 if self._copyfunc is _noop: |
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628 def _copyfunc(s): |
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629 self._load() |
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630 for d in self._dirs: |
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631 s._dirs[d] = self._dirs[d].copy() |
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632 s._files = dict.copy(self._files) |
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633 s._flags = dict.copy(self._flags) |
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634 if self._loadfunc is _noop: |
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635 _copyfunc(copy) |
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636 else: |
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637 copy._copyfunc = _copyfunc |
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638 else: |
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639 copy._copyfunc = self._copyfunc |
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640 return copy |
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641 |
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642 def filesnotin(self, m2): |
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643 '''Set of files in this manifest that are not in the other''' |
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644 files = set() |
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645 def _filesnotin(t1, t2): |
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646 if t1._node == t2._node and not t1._dirty and not t2._dirty: |
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647 return |
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648 t1._load() |
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649 t2._load() |
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650 for d, m1 in t1._dirs.iteritems(): |
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651 if d in t2._dirs: |
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652 m2 = t2._dirs[d] |
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653 _filesnotin(m1, m2) |
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654 else: |
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655 files.update(m1.iterkeys()) |
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656 |
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657 for fn in t1._files.iterkeys(): |
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658 if fn not in t2._files: |
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659 files.add(t1._subpath(fn)) |
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660 |
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661 _filesnotin(self, m2) |
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662 return files |
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663 |
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664 @propertycache |
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665 def _alldirs(self): |
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666 return util.dirs(self) |
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667 |
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668 def dirs(self): |
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669 return self._alldirs |
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670 |
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671 def hasdir(self, dir): |
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672 self._load() |
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673 topdir, subdir = _splittopdir(dir) |
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674 if topdir: |
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675 if topdir in self._dirs: |
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676 return self._dirs[topdir].hasdir(subdir) |
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677 return False |
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678 return (dir + '/') in self._dirs |
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679 |
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680 def walk(self, match): |
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681 '''Generates matching file names. |
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682 |
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683 Equivalent to manifest.matches(match).iterkeys(), but without creating |
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684 an entirely new manifest. |
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685 |
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686 It also reports nonexistent files by marking them bad with match.bad(). |
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687 ''' |
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688 if match.always(): |
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689 for f in iter(self): |
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690 yield f |
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691 return |
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692 |
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693 fset = set(match.files()) |
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694 |
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695 for fn in self._walk(match): |
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696 if fn in fset: |
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697 # specified pattern is the exact name |
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698 fset.remove(fn) |
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699 yield fn |
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700 |
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|
701 # for dirstate.walk, files=['.'] means "walk the whole tree". |
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702 # follow that here, too |
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703 fset.discard('.') |
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704 |
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705 for fn in sorted(fset): |
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706 if not self.hasdir(fn): |
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|
707 match.bad(fn, None) |
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|
708 |
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|
709 def _walk(self, match): |
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710 '''Recursively generates matching file names for walk().''' |
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711 if not match.visitdir(self._dir[:-1] or '.'): |
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712 return |
24647
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|
713 |
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|
714 # yield this dir's files and walk its submanifests |
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|
715 self._load() |
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716 for p in sorted(self._dirs.keys() + self._files.keys()): |
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717 if p in self._files: |
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718 fullp = self._subpath(p) |
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719 if match(fullp): |
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|
720 yield fullp |
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721 else: |
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722 for f in self._dirs[p]._walk(match): |
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723 yield f |
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724 |
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725 def matches(self, match): |
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726 '''generate a new manifest filtered by the match argument''' |
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727 if match.always(): |
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728 return self.copy() |
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|
729 |
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|
730 return self._matches(match) |
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|
731 |
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732 def _matches(self, match): |
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733 '''recursively generate a new manifest filtered by the match argument. |
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734 ''' |
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735 ret = treemanifest(self._dir) |
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|
736 |
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737 if not match.visitdir(self._dir[:-1] or '.'): |
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|
738 return ret |
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|
739 |
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|
740 self._load() |
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741 for fn in self._files: |
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742 fullp = self._subpath(fn) |
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743 if not match(fullp): |
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744 continue |
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745 ret._files[fn] = self._files[fn] |
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|
746 if fn in self._flags: |
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|
747 ret._flags[fn] = self._flags[fn] |
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|
748 |
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|
749 for dir, subm in self._dirs.iteritems(): |
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|
750 m = subm._matches(match) |
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|
751 if not m._isempty(): |
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|
752 ret._dirs[dir] = m |
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|
753 |
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|
754 if not ret._isempty(): |
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|
755 ret._dirty = True |
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|
756 return ret |
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|
757 |
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|
758 def diff(self, m2, clean=False): |
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759 '''Finds changes between the current manifest and m2. |
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|
760 |
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|
761 Args: |
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|
762 m2: the manifest to which this manifest should be compared. |
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|
763 clean: if true, include files unchanged between these manifests |
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|
764 with a None value in the returned dictionary. |
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|
765 |
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|
766 The result is returned as a dict with filename as key and |
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|
767 values of the form ((n1,fl1),(n2,fl2)), where n1/n2 is the |
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|
768 nodeid in the current/other manifest and fl1/fl2 is the flag |
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changeset
|
769 in the current/other manifest. Where the file does not exist, |
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|
770 the nodeid will be None and the flags will be the empty |
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|
771 string. |
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|
772 ''' |
24404
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|
773 result = {} |
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|
774 emptytree = treemanifest() |
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|
775 def _diff(t1, t2): |
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776 if t1._node == t2._node and not t1._dirty and not t2._dirty: |
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|
777 return |
25222
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|
778 t1._load() |
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|
779 t2._load() |
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|
780 for d, m1 in t1._dirs.iteritems(): |
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781 m2 = t2._dirs.get(d, emptytree) |
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|
782 _diff(m1, m2) |
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|
783 |
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|
784 for d, m2 in t2._dirs.iteritems(): |
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|
785 if d not in t1._dirs: |
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|
786 _diff(emptytree, m2) |
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|
787 |
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|
788 for fn, n1 in t1._files.iteritems(): |
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|
789 fl1 = t1._flags.get(fn, '') |
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|
790 n2 = t2._files.get(fn, None) |
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791 fl2 = t2._flags.get(fn, '') |
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|
792 if n1 != n2 or fl1 != fl2: |
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|
793 result[t1._subpath(fn)] = ((n1, fl1), (n2, fl2)) |
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|
794 elif clean: |
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changeset
|
795 result[t1._subpath(fn)] = None |
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|
796 |
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|
797 for fn, n2 in t2._files.iteritems(): |
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|
798 if fn not in t1._files: |
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|
799 fl2 = t2._flags.get(fn, '') |
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|
800 result[t2._subpath(fn)] = ((None, ''), (n2, fl2)) |
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|
801 |
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|
802 _diff(self, m2) |
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|
803 return result |
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|
804 |
25221
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changeset
|
805 def unmodifiedsince(self, m2): |
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|
806 return not self._dirty and not m2._dirty and self._node == m2._node |
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|
807 |
25091
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changeset
|
808 def parse(self, text, readsubtree): |
24781
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changeset
|
809 for f, n, fl in _parse(text): |
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|
810 if fl == 'd': |
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|
811 f = f + '/' |
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changeset
|
812 self._dirs[f] = readsubtree(self._subpath(f), n) |
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|
813 elif '/' in f: |
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|
814 # This is a flat manifest, so use __setitem__ and setflag rather |
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|
815 # than assigning directly to _files and _flags, so we can |
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|
816 # assign a path in a subdirectory, and to mark dirty (compared |
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817 # to nullid). |
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818 self[f] = n |
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|
819 if fl: |
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820 self.setflag(f, fl) |
25220
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|
821 else: |
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|
822 # Assigning to _files and _flags avoids marking as dirty, |
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823 # and should be a little faster. |
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824 self._files[f] = n |
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825 if fl: |
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|
826 self._flags[f] = fl |
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827 |
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828 def text(self, usemanifestv2=False): |
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829 """Get the full data of this manifest as a bytestring.""" |
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830 self._load() |
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831 flags = self.flags |
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832 return _text(((f, self[f], flags(f)) for f in self.keys()), |
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|
833 usemanifestv2) |
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834 |
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835 def dirtext(self, usemanifestv2=False): |
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836 """Get the full data of this directory as a bytestring. Make sure that |
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837 any submanifests have been written first, so their nodeids are correct. |
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838 """ |
25222
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839 self._load() |
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840 flags = self.flags |
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841 dirs = [(d[:-1], self._dirs[d]._node, 'd') for d in self._dirs] |
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842 files = [(f, self._files[f], flags(f)) for f in self._files] |
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843 return _text(sorted(dirs + files), usemanifestv2) |
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844 |
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845 def read(self, gettext, readsubtree): |
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846 def _load_for_read(s): |
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847 s.parse(gettext(), readsubtree) |
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848 s._dirty = False |
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849 self._loadfunc = _load_for_read |
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850 |
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851 def writesubtrees(self, m1, m2, writesubtree): |
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852 self._load() # for consistency; should never have any effect here |
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853 emptytree = treemanifest() |
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854 for d, subm in self._dirs.iteritems(): |
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855 subp1 = m1._dirs.get(d, emptytree)._node |
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856 subp2 = m2._dirs.get(d, emptytree)._node |
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857 if subp1 == revlog.nullid: |
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858 subp1, subp2 = subp2, subp1 |
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859 writesubtree(subm, subp1, subp2) |
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860 |
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|
861 class manifest(revlog.revlog): |
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862 def __init__(self, opener, dir='', dirlogcache=None): |
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863 '''The 'dir' and 'dirlogcache' arguments are for internal use by |
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864 manifest.manifest only. External users should create a root manifest |
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865 log with manifest.manifest(opener) and call dirlog() on it. |
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866 ''' |
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867 # During normal operations, we expect to deal with not more than four |
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868 # revs at a time (such as during commit --amend). When rebasing large |
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869 # stacks of commits, the number can go up, hence the config knob below. |
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870 cachesize = 4 |
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871 usetreemanifest = False |
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872 usemanifestv2 = False |
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873 opts = getattr(opener, 'options', None) |
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874 if opts is not None: |
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875 cachesize = opts.get('manifestcachesize', cachesize) |
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876 usetreemanifest = opts.get('treemanifest', usetreemanifest) |
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877 usemanifestv2 = opts.get('manifestv2', usemanifestv2) |
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878 self._mancache = util.lrucachedict(cachesize) |
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879 self._treeinmem = usetreemanifest |
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880 self._treeondisk = usetreemanifest |
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|
881 self._usemanifestv2 = usemanifestv2 |
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882 indexfile = "00manifest.i" |
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883 if dir: |
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|
884 assert self._treeondisk |
25119
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|
885 if not dir.endswith('/'): |
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|
886 dir = dir + '/' |
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887 indexfile = "meta/" + dir + "00manifest.i" |
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|
888 revlog.revlog.__init__(self, opener, indexfile) |
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889 self._dir = dir |
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890 # The dirlogcache is kept on the root manifest log |
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891 if dir: |
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|
892 self._dirlogcache = dirlogcache |
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893 else: |
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|
894 self._dirlogcache = {'': self} |
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895 |
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|
896 def _newmanifest(self, data=''): |
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897 if self._treeinmem: |
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|
898 return treemanifest(self._dir, data) |
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|
899 return manifestdict(data) |
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|
900 |
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|
901 def dirlog(self, dir): |
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902 assert self._treeondisk |
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|
903 if dir not in self._dirlogcache: |
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904 self._dirlogcache[dir] = manifest(self.opener, dir, |
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|
905 self._dirlogcache) |
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906 return self._dirlogcache[dir] |
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|
907 |
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|
908 def _slowreaddelta(self, node): |
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|
909 r0 = self.deltaparent(self.rev(node)) |
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|
910 m0 = self.read(self.node(r0)) |
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|
911 m1 = self.read(node) |
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|
912 md = self._newmanifest() |
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|
913 for f, ((n0, fl0), (n1, fl1)) in m0.diff(m1).iteritems(): |
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|
914 if n1: |
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|
915 md[f] = n1 |
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916 if fl1: |
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|
917 md.setflag(f, fl1) |
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918 return md |
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|
919 |
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|
920 def readdelta(self, node): |
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921 if self._usemanifestv2 or self._treeondisk: |
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|
922 return self._slowreaddelta(node) |
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|
923 r = self.rev(node) |
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|
924 d = mdiff.patchtext(self.revdiff(self.deltaparent(r), r)) |
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|
925 return self._newmanifest(d) |
3223
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|
926 |
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|
927 def readfast(self, node): |
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manifest: document return type of readfast()
Augie Fackler <augie@google.com>
parents:
24781
diff
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|
928 '''use the faster of readdelta or read |
d9832a12a06e
manifest: document return type of readfast()
Augie Fackler <augie@google.com>
parents:
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diff
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|
929 |
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parents:
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diff
changeset
|
930 This will return a manifest which is either only the files |
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parents:
24781
diff
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|
931 added/modified relative to p1, or all files in the |
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parents:
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diff
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|
932 manifest. Which one is returned depends on the codepath used |
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manifest: document return type of readfast()
Augie Fackler <augie@google.com>
parents:
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diff
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|
933 to retrieve the data. |
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diff
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|
934 ''' |
13711
ed913fd7837b
manifest: add readfast method
Matt Mackall <mpm@selenic.com>
parents:
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diff
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|
935 r = self.rev(node) |
14208
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revlog: compute correct deltaparent in the deltaparent function
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parents:
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diff
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|
936 deltaparent = self.deltaparent(r) |
d62d597b8974
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parents:
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diff
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|
937 if deltaparent != revlog.nullrev and deltaparent in self.parentrevs(r): |
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938 return self.readdelta(node) |
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|
939 return self.read(node) |
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|
940 |
0
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|
941 def read(self, node): |
7634
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revlog: kill from-style imports
Matt Mackall <mpm@selenic.com>
parents:
7633
diff
changeset
|
942 if node == revlog.nullid: |
24402
c2287f203ec4
treemanifest: add configuration for using treemanifest type
Martin von Zweigbergk <martinvonz@google.com>
parents:
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|
943 return self._newmanifest() # don't upset local cache |
18604
a1141f04e368
manifest: use a size 3 LRU cache to store parsed manifests
Siddharth Agarwal <sid0@fb.com>
parents:
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diff
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|
944 if node in self._mancache: |
a1141f04e368
manifest: use a size 3 LRU cache to store parsed manifests
Siddharth Agarwal <sid0@fb.com>
parents:
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|
945 return self._mancache[node][0] |
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|
946 if self._treeondisk: |
25222
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treemanifest: lazily load manifests
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|
947 def gettext(): |
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|
948 return self.revision(node) |
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|
949 def readsubtree(dir, subm): |
25185
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|
950 return self.dirlog(dir).read(subm) |
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|
951 m = self._newmanifest() |
25222
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diff
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|
952 m.read(gettext, readsubtree) |
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|
953 m.setnode(node) |
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|
954 arraytext = None |
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|
955 else: |
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|
956 text = self.revision(node) |
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957 m = self._newmanifest(text) |
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|
958 arraytext = array.array('c', text) |
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959 self._mancache[node] = (m, arraytext) |
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960 return m |
0
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|
961 |
2320
dbdce3b99988
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Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2142
diff
changeset
|
962 def find(self, node, f): |
dbdce3b99988
fix parsing of tags. make parse errors useful. add new tag tests.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
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diff
changeset
|
963 '''look up entry for a single file efficiently. |
4159
a896607d3ec3
fix manifest.find
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
3891
diff
changeset
|
964 return (node, flags) pair if found, (None, None) if not.''' |
24292
b7add2ebef9e
manifest: rewrite find(node, f) in terms of read(node)
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parents:
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diff
changeset
|
965 m = self.read(node) |
24225
3e5c4af69808
manifest: split manifestdict into high-level and low-level logic
Augie Fackler <augie@google.com>
parents:
24224
diff
changeset
|
966 try: |
24292
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parents:
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|
967 return m.find(f) |
24225
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parents:
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diff
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|
968 except KeyError: |
2320
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parents:
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|
969 return None, None |
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parents:
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diff
changeset
|
970 |
24147
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manifest: rename 'mf', 'map', and 'mapping' to 'm'
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parents:
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diff
changeset
|
971 def add(self, m, transaction, link, p1, p2, added, removed): |
24701
03ee576784e6
treemanifest: separate flags for trees in memory and trees on disk
Martin von Zweigbergk <martinvonz@google.com>
parents:
24700
diff
changeset
|
972 if (p1 in self._mancache and not self._treeinmem |
24527
8aead3bc5ff8
manifestv2: disable fastdelta optimization
Martin von Zweigbergk <martinvonz@google.com>
parents:
24526
diff
changeset
|
973 and not self._usemanifestv2): |
22788
160efd225b24
manifest: rearrange add() method and add comments for clarity
Augie Fackler <raf@durin42.com>
parents:
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diff
changeset
|
974 # If our first parent is in the manifest cache, we can |
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manifest: rearrange add() method and add comments for clarity
Augie Fackler <raf@durin42.com>
parents:
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diff
changeset
|
975 # compute a delta here using properties we know about the |
160efd225b24
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Augie Fackler <raf@durin42.com>
parents:
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diff
changeset
|
976 # manifest up-front, which may save time later for the |
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Augie Fackler <raf@durin42.com>
parents:
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diff
changeset
|
977 # revlog layer. |
644 | 978 |
22415
65ec6c5c0fb3
manifest: mark addlistdelta and checkforbidden as module-private
Augie Fackler <raf@durin42.com>
parents:
22409
diff
changeset
|
979 _checkforbidden(added) |
26199
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manifest: switch add() to heapq.merge (available in Py2.6+)
timeless@mozdev.org
parents:
25276
diff
changeset
|
980 # combine the changed lists into one sorted iterator |
5411059d93f8
manifest: switch add() to heapq.merge (available in Py2.6+)
timeless@mozdev.org
parents:
25276
diff
changeset
|
981 work = heapq.merge([(x, False) for x in added], |
5411059d93f8
manifest: switch add() to heapq.merge (available in Py2.6+)
timeless@mozdev.org
parents:
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diff
changeset
|
982 [(x, True) for x in removed]) |
644 | 983 |
24147
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parents:
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diff
changeset
|
984 arraytext, deltatext = m.fastdelta(self._mancache[p1][1], work) |
22931
48c0b101a9de
manifest: add fastdelta method to manifestdict
Augie Fackler <raf@durin42.com>
parents:
22930
diff
changeset
|
985 cachedelta = self.rev(p1), deltatext |
15657
d976b1ef6760
util: don't mess with builtins to emulate buffer()
Matt Mackall <mpm@selenic.com>
parents:
14632
diff
changeset
|
986 text = util.buffer(arraytext) |
24780
4ea521b3c554
manifest: duplicate call to addrevision()
Martin von Zweigbergk <martinvonz@google.com>
parents:
24701
diff
changeset
|
987 n = self.addrevision(text, transaction, link, p1, p2, cachedelta) |
22788
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manifest: rearrange add() method and add comments for clarity
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parents:
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diff
changeset
|
988 else: |
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parents:
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diff
changeset
|
989 # The first parent manifest isn't already loaded, so we'll |
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parents:
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diff
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|
990 # just encode a fulltext of the manifest and pass that |
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parents:
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diff
changeset
|
991 # through to the revlog layer, and let it handle the delta |
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parents:
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diff
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|
992 # process. |
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|
993 if self._treeondisk: |
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|
994 m1 = self.read(p1) |
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|
995 m2 = self.read(p2) |
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|
996 n = self._addtree(m, transaction, link, m1, m2) |
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|
997 arraytext = None |
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|
998 else: |
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changeset
|
999 text = m.text(self._usemanifestv2) |
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|
1000 n = self.addrevision(text, transaction, link, p1, p2) |
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|
1001 arraytext = array.array('c', text) |
1534 | 1002 |
24147
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|
1003 self._mancache[n] = (m, arraytext) |
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|
1004 |
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diff
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|
1005 return n |
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|
1006 |
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|
1007 def _addtree(self, m, transaction, link, m1, m2): |
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parents:
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|
1008 # If the manifest is unchanged compared to one parent, |
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|
1009 # don't write a new revision |
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|
1010 if m.unmodifiedsince(m1) or m.unmodifiedsince(m2): |
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|
1011 return m.node() |
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|
1012 def writesubtree(subm, subp1, subp2): |
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|
1013 sublog = self.dirlog(subm.dir()) |
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|
1014 sublog.add(subm, transaction, link, subp1, subp2, None, None) |
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|
1015 m.writesubtrees(m1, m2, writesubtree) |
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|
1016 text = m.dirtext(self._usemanifestv2) |
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|
1017 # Double-check whether contents are unchanged to one parent |
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|
1018 if text == m1.dirtext(self._usemanifestv2): |
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|
1019 n = m1.node() |
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|
1020 elif text == m2.dirtext(self._usemanifestv2): |
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|
1021 n = m2.node() |
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|
1022 else: |
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|
1023 n = self.addrevision(text, transaction, link, m1.node(), m2.node()) |
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diff
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|
1024 # Save nodeid so parent manifest can calculate its nodeid |
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|
1025 m.setnode(n) |
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|
1026 return n |