Mercurial > hg
annotate hgext/remotefilelog/metadatastore.py @ 51863:f4733654f144
typing: add `from __future__ import annotations` to most files
Now that py36 is no longer supported, we can postpone annotation evaluation.
This means that the quoting is usually optional (for things imported under the
guard of `if typing.TYPE_CHECKING:` to avoid circular imports), and there's less
overhead on startup[1].
There may be some missing here. I backed out 6000f5b25c9b (which removed the
`from __future__ import ...` that was supporting py2), reverted the changes in
`contrib/`, `doc/`, and `tests/`, and then ran:
$ hg status -n --change . | \
xargs sed -i -e 's/from __future__ import .*$/from __future__ import annotations/'
There were some minor tweaks needed when reviewing (mostly making the spacing
around the import consistent, and `mercurial/testing/__init__.py` had a
multiline import that wasn't fully rewritten.
[1] https://docs.python.org/3/whatsnew/3.7.html#pep-563-postponed-evaluation-of-annotations
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Mon, 16 Sep 2024 15:36:44 +0200 |
parents | 642e31cb55f0 |
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rev | line source |
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1 from __future__ import annotations |
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2 |
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3 from mercurial.node import ( |
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4 hex, |
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5 sha1nodeconstants, |
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6 ) |
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7 from . import ( |
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8 basestore, |
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9 shallowutil, |
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10 ) |
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11 |
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12 |
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13 class unionmetadatastore(basestore.baseunionstore): |
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14 def __init__(self, *args, **kwargs): |
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15 super(unionmetadatastore, self).__init__(*args, **kwargs) |
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16 |
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17 self.stores = args |
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18 self.writestore = kwargs.get('writestore') |
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19 |
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20 # If allowincomplete==True then the union store can return partial |
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21 # ancestor lists, otherwise it will throw a KeyError if a full |
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22 # history can't be found. |
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23 self.allowincomplete = kwargs.get('allowincomplete', False) |
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24 |
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25 def getancestors(self, name, node, known=None): |
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26 """Returns as many ancestors as we're aware of. |
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27 |
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28 return value: { |
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29 node: (p1, p2, linknode, copyfrom), |
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30 ... |
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31 } |
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32 """ |
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33 if known is None: |
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34 known = set() |
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35 if node in known: |
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36 return [] |
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37 |
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38 ancestors = {} |
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39 |
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40 def traverse(curname, curnode): |
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41 # TODO: this algorithm has the potential to traverse parts of |
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42 # history twice. Ex: with A->B->C->F and A->B->D->F, both D and C |
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43 # may be queued as missing, then B and A are traversed for both. |
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44 queue = [(curname, curnode)] |
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45 missing = [] |
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46 seen = set() |
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47 while queue: |
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48 name, node = queue.pop() |
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49 if (name, node) in seen: |
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50 continue |
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51 seen.add((name, node)) |
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52 value = ancestors.get(node) |
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53 if not value: |
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54 missing.append((name, node)) |
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55 continue |
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56 p1, p2, linknode, copyfrom = value |
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57 if p1 != sha1nodeconstants.nullid and p1 not in known: |
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58 queue.append((copyfrom or curname, p1)) |
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59 if p2 != sha1nodeconstants.nullid and p2 not in known: |
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60 queue.append((curname, p2)) |
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61 return missing |
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62 |
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63 missing = [(name, node)] |
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64 while missing: |
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65 curname, curnode = missing.pop() |
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66 try: |
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67 ancestors.update( |
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68 self._getpartialancestors(curname, curnode, known=known) |
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69 ) |
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70 newmissing = traverse(curname, curnode) |
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71 missing.extend(newmissing) |
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72 except KeyError: |
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73 # If we allow incomplete histories, don't throw. |
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74 if not self.allowincomplete: |
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75 raise |
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76 # If the requested name+node doesn't exist, always throw. |
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77 if (curname, curnode) == (name, node): |
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78 raise |
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79 |
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80 # TODO: ancestors should probably be (name, node) -> (value) |
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81 return ancestors |
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82 |
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83 @basestore.baseunionstore.retriable |
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84 def _getpartialancestors(self, name, node, known=None): |
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85 for store in self.stores: |
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86 try: |
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87 return store.getancestors(name, node, known=known) |
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88 except KeyError: |
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89 pass |
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90 |
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91 raise KeyError((name, hex(node))) |
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92 |
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93 @basestore.baseunionstore.retriable |
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94 def getnodeinfo(self, name, node): |
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95 for store in self.stores: |
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96 try: |
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97 return store.getnodeinfo(name, node) |
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98 except KeyError: |
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99 pass |
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100 |
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101 raise KeyError((name, hex(node))) |
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102 |
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103 def add(self, name, node, data): |
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104 raise RuntimeError( |
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105 b"cannot add content only to remotefilelog contentstore" |
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106 ) |
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107 |
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108 def getmissing(self, keys): |
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109 missing = keys |
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110 for store in self.stores: |
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111 if missing: |
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112 missing = store.getmissing(missing) |
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113 return missing |
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114 |
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115 def markledger(self, ledger, options=None): |
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116 for store in self.stores: |
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117 store.markledger(ledger, options) |
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118 |
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119 def getmetrics(self): |
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120 metrics = [s.getmetrics() for s in self.stores] |
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121 return shallowutil.sumdicts(*metrics) |
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122 |
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123 |
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124 class remotefilelogmetadatastore(basestore.basestore): |
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125 def getancestors(self, name, node, known=None): |
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126 """Returns as many ancestors as we're aware of. |
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127 |
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128 return value: { |
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129 node: (p1, p2, linknode, copyfrom), |
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130 ... |
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131 } |
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132 """ |
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133 data = self._getdata(name, node) |
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134 ancestors = shallowutil.ancestormap(data) |
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135 return ancestors |
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136 |
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137 def getnodeinfo(self, name, node): |
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138 return self.getancestors(name, node)[node] |
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139 |
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140 def add(self, name, node, parents, linknode): |
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141 raise RuntimeError( |
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142 b"cannot add metadata only to remotefilelog metadatastore" |
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143 ) |
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144 |
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145 |
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146 class remotemetadatastore: |
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147 def __init__(self, ui, fileservice, shared): |
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148 self._fileservice = fileservice |
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149 self._shared = shared |
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150 |
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151 def getancestors(self, name, node, known=None): |
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152 self._fileservice.prefetch( |
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153 [(name, hex(node))], force=True, fetchdata=False, fetchhistory=True |
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154 ) |
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155 return self._shared.getancestors(name, node, known=known) |
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156 |
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157 def getnodeinfo(self, name, node): |
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158 return self.getancestors(name, node)[node] |
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159 |
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160 def add(self, name, node, data): |
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161 raise RuntimeError(b"cannot add to a remote store") |
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162 |
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163 def getmissing(self, keys): |
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164 return keys |
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165 |
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166 def markledger(self, ledger, options=None): |
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167 pass |