Mercurial > hg
annotate rust/hg-cpython/src/parsers.rs @ 45914:be25b66f86ab
errors: raise InputError when too few arguments given to alias
Differential Revision: https://phab.mercurial-scm.org/D9389
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Mon, 23 Nov 2020 16:05:03 -0800 |
parents | 496537c9c1b4 |
children | 68a15b5a7e58 |
rev | line source |
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1 // parsers.rs |
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2 // |
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3 // Copyright 2019 Raphaël Gomès <rgomes@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 //! Bindings for the `hg::dirstate::parsers` module provided by the |
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9 //! `hg-core` package. |
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10 //! |
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11 //! From Python, this will be seen as `mercurial.rustext.parsers` |
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12 use cpython::{ |
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13 exc, PyBytes, PyDict, PyErr, PyInt, PyModule, PyResult, PyTuple, Python, |
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14 PythonObject, ToPyObject, |
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15 }; |
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16 use hg::{ |
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17 pack_dirstate, parse_dirstate, utils::hg_path::HgPathBuf, DirstateEntry, |
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18 DirstatePackError, DirstateParents, DirstateParseError, FastHashMap, |
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19 PARENT_SIZE, |
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20 }; |
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21 use std::convert::TryInto; |
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22 |
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23 use crate::dirstate::{extract_dirstate, make_dirstate_tuple}; |
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24 use std::time::Duration; |
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25 |
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26 fn parse_dirstate_wrapper( |
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27 py: Python, |
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28 dmap: PyDict, |
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29 copymap: PyDict, |
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30 st: PyBytes, |
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31 ) -> PyResult<PyTuple> { |
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32 match parse_dirstate(st.data(py)) { |
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33 Ok((parents, entries, copies)) => { |
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34 let dirstate_map: FastHashMap<HgPathBuf, DirstateEntry> = entries |
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35 .into_iter() |
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36 .map(|(path, entry)| (path.to_owned(), entry)) |
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37 .collect(); |
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38 let copy_map: FastHashMap<HgPathBuf, HgPathBuf> = copies |
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39 .into_iter() |
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40 .map(|(path, copy)| (path.to_owned(), copy.to_owned())) |
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41 .collect(); |
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42 |
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43 for (filename, entry) in &dirstate_map { |
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44 dmap.set_item( |
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45 py, |
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46 PyBytes::new(py, filename.as_bytes()), |
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47 make_dirstate_tuple(py, entry)?, |
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48 )?; |
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49 } |
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50 for (path, copy_path) in copy_map { |
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51 copymap.set_item( |
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52 py, |
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53 PyBytes::new(py, path.as_bytes()), |
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54 PyBytes::new(py, copy_path.as_bytes()), |
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55 )?; |
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56 } |
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57 Ok( |
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58 (PyBytes::new(py, &parents.p1), PyBytes::new(py, &parents.p2)) |
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59 .to_py_object(py), |
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60 ) |
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61 } |
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62 Err(e) => Err(PyErr::new::<exc::ValueError, _>( |
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63 py, |
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64 match e { |
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65 DirstateParseError::TooLittleData => { |
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66 "too little data for parents".to_string() |
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67 } |
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68 DirstateParseError::Overflow => { |
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69 "overflow in dirstate".to_string() |
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70 } |
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71 DirstateParseError::CorruptedEntry(e) => e, |
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72 DirstateParseError::Damaged => { |
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73 "dirstate appears to be damaged".to_string() |
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74 } |
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75 }, |
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76 )), |
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77 } |
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78 } |
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79 |
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80 fn pack_dirstate_wrapper( |
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81 py: Python, |
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82 dmap: PyDict, |
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83 copymap: PyDict, |
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84 pl: PyTuple, |
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85 now: PyInt, |
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86 ) -> PyResult<PyBytes> { |
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87 let p1 = pl.get_item(py, 0).extract::<PyBytes>(py)?; |
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88 let p1: &[u8] = p1.data(py); |
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89 let p2 = pl.get_item(py, 1).extract::<PyBytes>(py)?; |
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90 let p2: &[u8] = p2.data(py); |
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91 |
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92 let mut dirstate_map = extract_dirstate(py, &dmap)?; |
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93 |
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94 let copies: Result<FastHashMap<HgPathBuf, HgPathBuf>, PyErr> = copymap |
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95 .items(py) |
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96 .iter() |
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97 .map(|(key, value)| { |
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98 Ok(( |
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99 HgPathBuf::from_bytes(key.extract::<PyBytes>(py)?.data(py)), |
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100 HgPathBuf::from_bytes(value.extract::<PyBytes>(py)?.data(py)), |
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101 )) |
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102 }) |
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103 .collect(); |
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104 |
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105 if p1.len() != PARENT_SIZE || p2.len() != PARENT_SIZE { |
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106 return Err(PyErr::new::<exc::ValueError, _>( |
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107 py, |
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108 "expected a 20-byte hash".to_string(), |
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109 )); |
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110 } |
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111 |
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112 match pack_dirstate( |
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113 &mut dirstate_map, |
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114 &copies?, |
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115 DirstateParents { |
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116 p1: p1.try_into().unwrap(), |
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117 p2: p2.try_into().unwrap(), |
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118 }, |
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119 Duration::from_secs(now.as_object().extract::<u64>(py)?), |
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120 ) { |
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121 Ok(packed) => { |
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122 for (filename, entry) in dirstate_map.iter() { |
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123 dmap.set_item( |
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124 py, |
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125 PyBytes::new(py, filename.as_bytes()), |
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126 make_dirstate_tuple(py, &entry)?, |
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127 )?; |
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128 } |
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129 Ok(PyBytes::new(py, &packed)) |
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130 } |
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131 Err(error) => Err(PyErr::new::<exc::ValueError, _>( |
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132 py, |
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133 match error { |
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134 DirstatePackError::CorruptedParent => { |
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135 "expected a 20-byte hash".to_string() |
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136 } |
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137 DirstatePackError::CorruptedEntry(e) => e, |
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138 DirstatePackError::BadSize(expected, actual) => { |
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139 format!("bad dirstate size: {} != {}", actual, expected) |
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140 } |
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141 }, |
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142 )), |
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143 } |
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144 } |
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145 |
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146 /// Create the module, with `__package__` given from parent |
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147 pub fn init_parsers_module(py: Python, package: &str) -> PyResult<PyModule> { |
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148 let dotted_name = &format!("{}.parsers", package); |
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149 let m = PyModule::new(py, dotted_name)?; |
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150 |
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151 m.add(py, "__package__", package)?; |
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152 m.add(py, "__doc__", "Parsers - Rust implementation")?; |
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153 |
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154 m.add( |
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155 py, |
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156 "parse_dirstate", |
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157 py_fn!( |
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158 py, |
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159 parse_dirstate_wrapper(dmap: PyDict, copymap: PyDict, st: PyBytes) |
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160 ), |
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161 )?; |
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162 m.add( |
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163 py, |
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164 "pack_dirstate", |
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165 py_fn!( |
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166 py, |
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167 pack_dirstate_wrapper( |
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168 dmap: PyDict, |
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169 copymap: PyDict, |
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170 pl: PyTuple, |
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171 now: PyInt |
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172 ) |
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173 ), |
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174 )?; |
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175 |
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176 let sys = PyModule::import(py, "sys")?; |
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177 let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?; |
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178 sys_modules.set_item(py, dotted_name, &m)?; |
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179 |
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180 Ok(m) |
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181 } |