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annotate rust/hg-cpython/src/revlog.rs @ 44070:451d22174b5f

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revlog: run rustfmt nightly I'm a little nervous about folding this back (might be nightly rustfmt mismatches?) so I want someone to review this. Differential Revision: https://phab.mercurial-scm.org/D7813
author Augie Fackler <augie@google.com>
date Wed, 08 Jan 2020 14:37:54 -0500
parents 443dc1655923
children 887d0f921b34
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 }
44010
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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 }
43961
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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 }