author | Augie Fackler <augie@google.com> |
Sat, 05 Oct 2019 09:55:56 -0400 | |
changeset 43049 | 6e8582ccf76d |
parent 40610 | 13d4ad8d7801 |
child 43076 | 2372284d9457 |
permissions | -rw-r--r-- |
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from __future__ import absolute_import |
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from mercurial.node import hex, nullid |
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from . import ( |
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basestore, |
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shallowutil, |
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) |
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class unionmetadatastore(basestore.baseunionstore): |
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def __init__(self, *args, **kwargs): |
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super(unionmetadatastore, self).__init__(*args, **kwargs) |
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self.stores = args |
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self.writestore = kwargs.get(r'writestore') |
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# If allowincomplete==True then the union store can return partial |
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# ancestor lists, otherwise it will throw a KeyError if a full |
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# history can't be found. |
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self.allowincomplete = kwargs.get(r'allowincomplete', False) |
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def getancestors(self, name, node, known=None): |
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"""Returns as many ancestors as we're aware of. |
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return value: { |
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node: (p1, p2, linknode, copyfrom), |
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... |
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} |
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""" |
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if known is None: |
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known = set() |
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if node in known: |
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return [] |
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ancestors = {} |
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def traverse(curname, curnode): |
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# TODO: this algorithm has the potential to traverse parts of |
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# history twice. Ex: with A->B->C->F and A->B->D->F, both D and C |
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# may be queued as missing, then B and A are traversed for both. |
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queue = [(curname, curnode)] |
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missing = [] |
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seen = set() |
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while queue: |
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name, node = queue.pop() |
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if (name, node) in seen: |
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continue |
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seen.add((name, node)) |
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value = ancestors.get(node) |
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if not value: |
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missing.append((name, node)) |
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continue |
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p1, p2, linknode, copyfrom = value |
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if p1 != nullid and p1 not in known: |
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queue.append((copyfrom or curname, p1)) |
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if p2 != nullid and p2 not in known: |
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queue.append((curname, p2)) |
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return missing |
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missing = [(name, node)] |
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while missing: |
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curname, curnode = missing.pop() |
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try: |
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ancestors.update(self._getpartialancestors(curname, curnode, |
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known=known)) |
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newmissing = traverse(curname, curnode) |
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missing.extend(newmissing) |
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except KeyError: |
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# If we allow incomplete histories, don't throw. |
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if not self.allowincomplete: |
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raise |
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# If the requested name+node doesn't exist, always throw. |
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if (curname, curnode) == (name, node): |
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raise |
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# TODO: ancestors should probably be (name, node) -> (value) |
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return ancestors |
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@basestore.baseunionstore.retriable |
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def _getpartialancestors(self, name, node, known=None): |
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for store in self.stores: |
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try: |
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return store.getancestors(name, node, known=known) |
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except KeyError: |
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pass |
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raise KeyError((name, hex(node))) |
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@basestore.baseunionstore.retriable |
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def getnodeinfo(self, name, node): |
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for store in self.stores: |
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try: |
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return store.getnodeinfo(name, node) |
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except KeyError: |
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pass |
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raise KeyError((name, hex(node))) |
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def add(self, name, node, data): |
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raise RuntimeError("cannot add content only to remotefilelog " |
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"contentstore") |
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def getmissing(self, keys): |
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missing = keys |
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for store in self.stores: |
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if missing: |
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missing = store.getmissing(missing) |
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return missing |
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107 |
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108 |
def markledger(self, ledger, options=None): |
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109 |
for store in self.stores: |
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110 |
store.markledger(ledger, options) |
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111 |
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112 |
def getmetrics(self): |
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metrics = [s.getmetrics() for s in self.stores] |
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114 |
return shallowutil.sumdicts(*metrics) |
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115 |
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116 |
class remotefilelogmetadatastore(basestore.basestore): |
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117 |
def getancestors(self, name, node, known=None): |
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118 |
"""Returns as many ancestors as we're aware of. |
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119 |
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120 |
return value: { |
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121 |
node: (p1, p2, linknode, copyfrom), |
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122 |
... |
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123 |
} |
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124 |
""" |
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125 |
data = self._getdata(name, node) |
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126 |
ancestors = shallowutil.ancestormap(data) |
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127 |
return ancestors |
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128 |
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129 |
def getnodeinfo(self, name, node): |
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130 |
return self.getancestors(name, node)[node] |
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131 |
|
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132 |
def add(self, name, node, parents, linknode): |
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133 |
raise RuntimeError("cannot add metadata only to remotefilelog " |
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134 |
"metadatastore") |
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135 |
|
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136 |
class remotemetadatastore(object): |
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137 |
def __init__(self, ui, fileservice, shared): |
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138 |
self._fileservice = fileservice |
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139 |
self._shared = shared |
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140 |
|
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141 |
def getancestors(self, name, node, known=None): |
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142 |
self._fileservice.prefetch([(name, hex(node))], force=True, |
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143 |
fetchdata=False, fetchhistory=True) |
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144 |
return self._shared.getancestors(name, node, known=known) |
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145 |
|
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146 |
def getnodeinfo(self, name, node): |
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147 |
return self.getancestors(name, node)[node] |
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148 |
|
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149 |
def add(self, name, node, data): |
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150 |
raise RuntimeError("cannot add to a remote store") |
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151 |
|
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152 |
def getmissing(self, keys): |
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153 |
return keys |
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154 |
|
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155 |
def markledger(self, ledger, options=None): |
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156 |
pass |