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annotate rust/hg-cpython/src/revlog.rs @ 44304:dbbae122f5e4

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manifest: remove optional default= argument on flags(path) It had only one caller inside manifest.py, and treemanifest was actually incorrectly implemented. treemanifest is still missing the fastdelta() method from the interface (and so doesn't yet conform), but this is at least progress. Differential Revision: https://phab.mercurial-scm.org/D8069
author Augie Fackler <augie@google.com>
date Mon, 03 Feb 2020 22:16:36 -0500
parents 451d22174b5f
children 887d0f921b34
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1 // revlog.rs
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2 //
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3 // Copyright 2019 Georges Racinet <georges.racinet@octobus.net>
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4 //
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5 // This software may be used and distributed according to the terms of the
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6 // GNU General Public License version 2 or any later version.
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7
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8 use crate::cindex;
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9 use cpython::{
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10 ObjectProtocol, PyClone, PyDict, PyModule, PyObject, PyResult, PyTuple,
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11 Python, PythonObject, ToPyObject,
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12 };
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13 use hg::Revision;
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14 use std::cell::RefCell;
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15
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16 /// Return a Struct implementing the Graph trait
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17 pub(crate) fn pyindex_to_graph(
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18 py: Python,
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19 index: PyObject,
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20 ) -> PyResult<cindex::Index> {
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21 match index.extract::<MixedIndex>(py) {
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22 Ok(midx) => Ok(midx.clone_cindex(py)),
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23 Err(_) => cindex::Index::new(py, index),
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24 }
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25 }
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26
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27 py_class!(pub class MixedIndex |py| {
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28 data cindex: RefCell<cindex::Index>;
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29
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30 def __new__(_cls, cindex: PyObject) -> PyResult<MixedIndex> {
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31 Self::create_instance(py, RefCell::new(
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32 cindex::Index::new(py, cindex)?))
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33 }
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34
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35 /// Compatibility layer used for Python consumers needing access to the C index
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36 ///
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37 /// Only use case so far is `scmutil.shortesthexnodeidprefix`,
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38 /// that may need to build a custom `nodetree`, based on a specified revset.
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39 /// With a Rust implementation of the nodemap, we will be able to get rid of
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40 /// this, by exposing our own standalone nodemap class,
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41 /// ready to accept `MixedIndex`.
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42 def get_cindex(&self) -> PyResult<PyObject> {
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43 Ok(self.cindex(py).borrow().inner().clone_ref(py))
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44 }
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45
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46
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47 // Reforwarded C index API
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48
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49 // index_methods (tp_methods). Same ordering as in revlog.c
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50
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51 /// return the gca set of the given revs
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52 def ancestors(&self, *args, **kw) -> PyResult<PyObject> {
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53 self.call_cindex(py, "ancestors", args, kw)
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54 }
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55
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56 /// return the heads of the common ancestors of the given revs
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57 def commonancestorsheads(&self, *args, **kw) -> PyResult<PyObject> {
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58 self.call_cindex(py, "commonancestorsheads", args, kw)
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59 }
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60
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61 /// clear the index caches
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62 def clearcaches(&self, *args, **kw) -> PyResult<PyObject> {
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63 self.call_cindex(py, "clearcaches", args, kw)
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64 }
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65
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66 /// get an index entry
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67 def get(&self, *args, **kw) -> PyResult<PyObject> {
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68 self.call_cindex(py, "get", args, kw)
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69 }
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70
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71 /// return `rev` associated with a node or None
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72 def get_rev(&self, *args, **kw) -> PyResult<PyObject> {
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73 self.call_cindex(py, "get_rev", args, kw)
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74 }
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75
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76 /// return True if the node exist in the index
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77 def has_node(&self, *args, **kw) -> PyResult<PyObject> {
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78 self.call_cindex(py, "has_node", args, kw)
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79 }
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80
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81 /// return `rev` associated with a node or raise RevlogError
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82 def rev(&self, *args, **kw) -> PyResult<PyObject> {
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83 self.call_cindex(py, "rev", args, kw)
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84 }
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85
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86 /// compute phases
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87 def computephasesmapsets(&self, *args, **kw) -> PyResult<PyObject> {
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88 self.call_cindex(py, "computephasesmapsets", args, kw)
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89 }
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90
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91 /// reachableroots
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92 def reachableroots2(&self, *args, **kw) -> PyResult<PyObject> {
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93 self.call_cindex(py, "reachableroots2", args, kw)
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94 }
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95
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96 /// get head revisions
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97 def headrevs(&self, *args, **kw) -> PyResult<PyObject> {
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98 self.call_cindex(py, "headrevs", args, kw)
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99 }
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100
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101 /// get filtered head revisions
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102 def headrevsfiltered(&self, *args, **kw) -> PyResult<PyObject> {
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103 self.call_cindex(py, "headrevsfiltered", args, kw)
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104 }
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105
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106 /// True if the object is a snapshot
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107 def issnapshot(&self, *args, **kw) -> PyResult<PyObject> {
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108 self.call_cindex(py, "issnapshot", args, kw)
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109 }
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110
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111 /// Gather snapshot data in a cache dict
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112 def findsnapshots(&self, *args, **kw) -> PyResult<PyObject> {
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113 self.call_cindex(py, "findsnapshots", args, kw)
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114 }
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115
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116 /// determine revisions with deltas to reconstruct fulltext
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117 def deltachain(&self, *args, **kw) -> PyResult<PyObject> {
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118 self.call_cindex(py, "deltachain", args, kw)
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119 }
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120
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121 /// slice planned chunk read to reach a density threshold
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122 def slicechunktodensity(&self, *args, **kw) -> PyResult<PyObject> {
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123 self.call_cindex(py, "slicechunktodensity", args, kw)
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124 }
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125
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126 /// append an index entry
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127 def append(&self, *args, **kw) -> PyResult<PyObject> {
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128 self.call_cindex(py, "append", args, kw)
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129 }
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130
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131 /// match a potentially ambiguous node ID
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132 def partialmatch(&self, *args, **kw) -> PyResult<PyObject> {
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133 self.call_cindex(py, "partialmatch", args, kw)
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134 }
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135
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136 /// find length of shortest hex nodeid of a binary ID
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137 def shortest(&self, *args, **kw) -> PyResult<PyObject> {
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138 self.call_cindex(py, "shortest", args, kw)
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139 }
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140
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141 /// stats for the index
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142 def stats(&self, *args, **kw) -> PyResult<PyObject> {
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143 self.call_cindex(py, "stats", args, kw)
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144 }
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145
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146 // index_sequence_methods and index_mapping_methods.
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147 //
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148 // Since we call back through the high level Python API,
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149 // there's no point making a distinction between index_get
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150 // and index_getitem.
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151
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152 def __len__(&self) -> PyResult<usize> {
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153 self.cindex(py).borrow().inner().len(py)
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154 }
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155
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156 def __getitem__(&self, key: PyObject) -> PyResult<PyObject> {
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157 // this conversion seems needless, but that's actually because
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158 // `index_getitem` does not handle conversion from PyLong,
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159 // which expressions such as [e for e in index] internally use.
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160 // Note that we don't seem to have a direct way to call
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161 // PySequence_GetItem (does the job), which would be better for
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162 // for performance
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163 let key = match key.extract::<Revision>(py) {
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164 Ok(rev) => rev.to_py_object(py).into_object(),
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165 Err(_) => key,
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166 };
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167 self.cindex(py).borrow().inner().get_item(py, key)
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168 }
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169
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170 def __setitem__(&self, key: PyObject, value: PyObject) -> PyResult<()> {
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171 self.cindex(py).borrow().inner().set_item(py, key, value)
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172 }
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173
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174 def __delitem__(&self, key: PyObject) -> PyResult<()> {
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175 self.cindex(py).borrow().inner().del_item(py, key)
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176 }
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177
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178 def __contains__(&self, item: PyObject) -> PyResult<bool> {
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179 // ObjectProtocol does not seem to provide contains(), so
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180 // this is an equivalent implementation of the index_contains()
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181 // defined in revlog.c
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182 let cindex = self.cindex(py).borrow();
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183 match item.extract::<Revision>(py) {
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184 Ok(rev) => {
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185 Ok(rev >= -1 && rev < cindex.inner().len(py)? as Revision)
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186 }
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187 Err(_) => {
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188 cindex.inner().call_method(
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189 py,
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190 "has_node",
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191 PyTuple::new(py, &[item]),
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192 None)?
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193 .extract(py)
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194 }
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195 }
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196 }
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197
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198
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199 });
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200
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201 impl MixedIndex {
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202 /// forward a method call to the underlying C index
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203 fn call_cindex(
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204 &self,
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205 py: Python,
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206 name: &str,
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207 args: &PyTuple,
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208 kwargs: Option<&PyDict>,
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209 ) -> PyResult<PyObject> {
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210 self.cindex(py)
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211 .borrow()
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212 .inner()
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213 .call_method(py, name, args, kwargs)
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214 }
44013
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215
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216 pub fn clone_cindex(&self, py: Python) -> cindex::Index {
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217 self.cindex(py).borrow().clone_ref(py)
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218 }
43966
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219 }
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220
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221 /// Create the module, with __package__ given from parent
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222 pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> {
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223 let dotted_name = &format!("{}.revlog", package);
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224 let m = PyModule::new(py, dotted_name)?;
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225 m.add(py, "__package__", package)?;
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226 m.add(py, "__doc__", "RevLog - Rust implementations")?;
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227
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228 m.add_class::<MixedIndex>(py)?;
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229
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230 let sys = PyModule::import(py, "sys")?;
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231 let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?;
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232 sys_modules.set_item(py, dotted_name, &m)?;
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233
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234 Ok(m)
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235 }