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annotate rust/hg-cpython/src/revlog.rs @ 44513:887d0f921b34

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rust-index: moved constructor in separate impl block with the upcoming addition of the nodemap logic, it's going to become more complicated. Being in the separate impl block has the advantage to be subject to rustfmt, whereas code inside macro calls isn't. Differential Revision: https://phab.mercurial-scm.org/D8153
author Georges Racinet <georges.racinet@octobus.net>
date Mon, 13 Jan 2020 19:56:16 +0100
parents 451d22174b5f
children 26dd35ac59b8
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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::new(py, cindex)
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32 }
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33
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34 /// Compatibility layer used for Python consumers needing access to the C index
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35 ///
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36 /// Only use case so far is `scmutil.shortesthexnodeidprefix`,
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37 /// that may need to build a custom `nodetree`, based on a specified revset.
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38 /// With a Rust implementation of the nodemap, we will be able to get rid of
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39 /// this, by exposing our own standalone nodemap class,
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40 /// ready to accept `MixedIndex`.
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41 def get_cindex(&self) -> PyResult<PyObject> {
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42 Ok(self.cindex(py).borrow().inner().clone_ref(py))
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43 }
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44
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45
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46 // Reforwarded C index API
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47
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48 // index_methods (tp_methods). Same ordering as in revlog.c
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49
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50 /// return the gca set of the given revs
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51 def ancestors(&self, *args, **kw) -> PyResult<PyObject> {
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52 self.call_cindex(py, "ancestors", args, kw)
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53 }
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54
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55 /// return the heads of the common ancestors of the given revs
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56 def commonancestorsheads(&self, *args, **kw) -> PyResult<PyObject> {
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57 self.call_cindex(py, "commonancestorsheads", args, kw)
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58 }
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59
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60 /// clear the index caches
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61 def clearcaches(&self, *args, **kw) -> PyResult<PyObject> {
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62 self.call_cindex(py, "clearcaches", args, kw)
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63 }
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64
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65 /// get an index entry
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66 def get(&self, *args, **kw) -> PyResult<PyObject> {
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67 self.call_cindex(py, "get", args, kw)
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68 }
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69
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70 /// return `rev` associated with a node or None
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71 def get_rev(&self, *args, **kw) -> PyResult<PyObject> {
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72 self.call_cindex(py, "get_rev", args, kw)
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73 }
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74
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75 /// return True if the node exist in the index
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76 def has_node(&self, *args, **kw) -> PyResult<PyObject> {
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77 self.call_cindex(py, "has_node", args, kw)
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78 }
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79
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80 /// return `rev` associated with a node or raise RevlogError
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81 def rev(&self, *args, **kw) -> PyResult<PyObject> {
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82 self.call_cindex(py, "rev", args, kw)
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83 }
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84
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85 /// compute phases
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86 def computephasesmapsets(&self, *args, **kw) -> PyResult<PyObject> {
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87 self.call_cindex(py, "computephasesmapsets", args, kw)
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88 }
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89
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90 /// reachableroots
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91 def reachableroots2(&self, *args, **kw) -> PyResult<PyObject> {
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92 self.call_cindex(py, "reachableroots2", args, kw)
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93 }
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94
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95 /// get head revisions
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96 def headrevs(&self, *args, **kw) -> PyResult<PyObject> {
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97 self.call_cindex(py, "headrevs", args, kw)
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98 }
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99
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100 /// get filtered head revisions
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101 def headrevsfiltered(&self, *args, **kw) -> PyResult<PyObject> {
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102 self.call_cindex(py, "headrevsfiltered", args, kw)
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103 }
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104
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105 /// True if the object is a snapshot
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106 def issnapshot(&self, *args, **kw) -> PyResult<PyObject> {
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107 self.call_cindex(py, "issnapshot", args, kw)
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108 }
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109
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110 /// Gather snapshot data in a cache dict
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111 def findsnapshots(&self, *args, **kw) -> PyResult<PyObject> {
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112 self.call_cindex(py, "findsnapshots", args, kw)
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113 }
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114
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115 /// determine revisions with deltas to reconstruct fulltext
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116 def deltachain(&self, *args, **kw) -> PyResult<PyObject> {
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117 self.call_cindex(py, "deltachain", args, kw)
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118 }
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119
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120 /// slice planned chunk read to reach a density threshold
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121 def slicechunktodensity(&self, *args, **kw) -> PyResult<PyObject> {
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122 self.call_cindex(py, "slicechunktodensity", args, kw)
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123 }
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124
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125 /// append an index entry
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126 def append(&self, *args, **kw) -> PyResult<PyObject> {
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127 self.call_cindex(py, "append", args, kw)
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128 }
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129
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130 /// match a potentially ambiguous node ID
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131 def partialmatch(&self, *args, **kw) -> PyResult<PyObject> {
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132 self.call_cindex(py, "partialmatch", args, kw)
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133 }
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134
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135 /// find length of shortest hex nodeid of a binary ID
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136 def shortest(&self, *args, **kw) -> PyResult<PyObject> {
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137 self.call_cindex(py, "shortest", args, kw)
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138 }
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139
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140 /// stats for the index
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141 def stats(&self, *args, **kw) -> PyResult<PyObject> {
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142 self.call_cindex(py, "stats", args, kw)
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143 }
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144
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145 // index_sequence_methods and index_mapping_methods.
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146 //
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147 // Since we call back through the high level Python API,
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148 // there's no point making a distinction between index_get
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149 // and index_getitem.
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150
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151 def __len__(&self) -> PyResult<usize> {
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152 self.cindex(py).borrow().inner().len(py)
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153 }
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154
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155 def __getitem__(&self, key: PyObject) -> PyResult<PyObject> {
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156 // this conversion seems needless, but that's actually because
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157 // `index_getitem` does not handle conversion from PyLong,
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158 // which expressions such as [e for e in index] internally use.
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159 // Note that we don't seem to have a direct way to call
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160 // PySequence_GetItem (does the job), which would be better for
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161 // for performance
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162 let key = match key.extract::<Revision>(py) {
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163 Ok(rev) => rev.to_py_object(py).into_object(),
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164 Err(_) => key,
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165 };
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166 self.cindex(py).borrow().inner().get_item(py, key)
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167 }
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168
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169 def __setitem__(&self, key: PyObject, value: PyObject) -> PyResult<()> {
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170 self.cindex(py).borrow().inner().set_item(py, key, value)
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171 }
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172
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173 def __delitem__(&self, key: PyObject) -> PyResult<()> {
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174 self.cindex(py).borrow().inner().del_item(py, key)
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175 }
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176
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177 def __contains__(&self, item: PyObject) -> PyResult<bool> {
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178 // ObjectProtocol does not seem to provide contains(), so
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179 // this is an equivalent implementation of the index_contains()
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180 // defined in revlog.c
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181 let cindex = self.cindex(py).borrow();
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182 match item.extract::<Revision>(py) {
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183 Ok(rev) => {
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184 Ok(rev >= -1 && rev < cindex.inner().len(py)? as Revision)
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185 }
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186 Err(_) => {
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187 cindex.inner().call_method(
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188 py,
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189 "has_node",
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190 PyTuple::new(py, &[item]),
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191 None)?
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192 .extract(py)
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193 }
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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 impl MixedIndex {
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201 fn new(py: Python, cindex: PyObject) -> PyResult<MixedIndex> {
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202 Self::create_instance(
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203 py,
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204 RefCell::new(cindex::Index::new(py, cindex)?),
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205 )
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206 }
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207
43966
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208 /// forward a method call to the underlying C index
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209 fn call_cindex(
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210 &self,
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211 py: Python,
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212 name: &str,
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213 args: &PyTuple,
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214 kwargs: Option<&PyDict>,
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215 ) -> PyResult<PyObject> {
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216 self.cindex(py)
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217 .borrow()
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218 .inner()
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219 .call_method(py, name, args, kwargs)
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220 }
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221
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222 pub fn clone_cindex(&self, py: Python) -> cindex::Index {
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223 self.cindex(py).borrow().clone_ref(py)
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224 }
43966
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225 }
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226
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227 /// Create the module, with __package__ given from parent
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228 pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> {
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229 let dotted_name = &format!("{}.revlog", package);
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230 let m = PyModule::new(py, dotted_name)?;
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231 m.add(py, "__package__", package)?;
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232 m.add(py, "__doc__", "RevLog - Rust implementations")?;
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233
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234 m.add_class::<MixedIndex>(py)?;
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235
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236 let sys = PyModule::import(py, "sys")?;
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237 let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?;
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238 sys_modules.set_item(py, dotted_name, &m)?;
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239
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240 Ok(m)
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241 }