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@@ -1,498 +1,505 b'' | |||
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1 | 1 | # pycompat.py - portability shim for python 3 |
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2 | 2 | # |
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3 | 3 | # This software may be used and distributed according to the terms of the |
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4 | 4 | # GNU General Public License version 2 or any later version. |
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5 | 5 | |
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6 | 6 | """Mercurial portability shim for python 3. |
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7 | 7 | |
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8 | 8 | This contains aliases to hide python version-specific details from the core. |
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9 | 9 | """ |
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10 | 10 | |
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11 | 11 | |
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12 | 12 | import builtins |
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13 | 13 | import codecs |
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14 | 14 | import concurrent.futures as futures |
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15 | 15 | import functools |
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16 | 16 | import getopt |
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17 | 17 | import http.client as httplib |
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18 | 18 | import http.cookiejar as cookielib |
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19 | 19 | import inspect |
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20 | 20 | import io |
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21 | 21 | import json |
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22 | 22 | import os |
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23 | 23 | import queue |
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24 | 24 | import shlex |
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25 | 25 | import socketserver |
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26 | 26 | import struct |
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27 | 27 | import sys |
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28 | 28 | import tempfile |
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29 | 29 | import xmlrpc.client as xmlrpclib |
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30 | 30 | |
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31 | 31 | from typing import ( |
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32 | 32 | Any, |
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33 | 33 | AnyStr, |
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34 | 34 | BinaryIO, |
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35 | 35 | Callable, |
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36 | 36 | Dict, |
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37 | 37 | Iterable, |
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38 | 38 | Iterator, |
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39 | 39 | List, |
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40 | 40 | Mapping, |
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41 | 41 | NoReturn, |
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42 | 42 | Optional, |
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43 | 43 | Sequence, |
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44 | 44 | Tuple, |
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45 | 45 | Type, |
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46 | 46 | TypeVar, |
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47 | 47 | cast, |
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48 | 48 | overload, |
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49 | 49 | ) |
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50 | 50 | |
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51 | 51 | ispy3 = sys.version_info[0] >= 3 |
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52 | 52 | ispypy = '__pypy__' in sys.builtin_module_names |
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53 | 53 | TYPE_CHECKING = False |
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54 | 54 | |
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55 | 55 | if not globals(): # hide this from non-pytype users |
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56 | 56 | import typing |
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57 | 57 | |
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58 | 58 | TYPE_CHECKING = typing.TYPE_CHECKING |
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59 | 59 | |
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60 | 60 | _GetOptResult = Tuple[List[Tuple[bytes, bytes]], List[bytes]] |
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61 | 61 | _T0 = TypeVar('_T0') |
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62 | 62 | _T1 = TypeVar('_T1') |
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63 | 63 | _S = TypeVar('_S') |
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64 | 64 | _Tbytestr = TypeVar('_Tbytestr', bound='bytestr') |
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65 | 65 | |
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66 | 66 | |
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67 | 67 | def future_set_exception_info(f, exc_info): |
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68 | 68 | f.set_exception(exc_info[0]) |
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69 | 69 | |
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70 | 70 | |
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71 | 71 | FileNotFoundError = builtins.FileNotFoundError |
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72 | 72 | |
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73 | 73 | |
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74 | 74 | def identity(a: _T0) -> _T0: |
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75 | 75 | return a |
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76 | 76 | |
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77 | 77 | |
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78 | 78 | def _rapply(f, xs): |
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79 | 79 | if xs is None: |
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80 | 80 | # assume None means non-value of optional data |
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81 | 81 | return xs |
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82 | 82 | if isinstance(xs, (list, set, tuple)): |
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83 | 83 | return type(xs)(_rapply(f, x) for x in xs) |
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84 | 84 | if isinstance(xs, dict): |
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85 | 85 | return type(xs)((_rapply(f, k), _rapply(f, v)) for k, v in xs.items()) |
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86 | 86 | return f(xs) |
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87 | 87 | |
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88 | 88 | |
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89 | 89 | def rapply(f, xs): |
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90 | 90 | """Apply function recursively to every item preserving the data structure |
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91 | 91 | |
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92 | 92 | >>> def f(x): |
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93 | 93 | ... return 'f(%s)' % x |
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94 | 94 | >>> rapply(f, None) is None |
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95 | 95 | True |
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96 | 96 | >>> rapply(f, 'a') |
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97 | 97 | 'f(a)' |
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98 | 98 | >>> rapply(f, {'a'}) == {'f(a)'} |
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99 | 99 | True |
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100 | 100 | >>> rapply(f, ['a', 'b', None, {'c': 'd'}, []]) |
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101 | 101 | ['f(a)', 'f(b)', None, {'f(c)': 'f(d)'}, []] |
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102 | 102 | |
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103 | 103 | >>> xs = [object()] |
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104 | 104 | >>> rapply(identity, xs) is xs |
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105 | 105 | True |
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106 | 106 | """ |
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107 | 107 | if f is identity: |
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108 | 108 | # fast path mainly for py2 |
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109 | 109 | return xs |
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110 | 110 | return _rapply(f, xs) |
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111 | 111 | |
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112 | 112 | |
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113 | 113 | if os.name == r'nt': |
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114 | 114 | # MBCS (or ANSI) filesystem encoding must be used as before. |
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115 | 115 | # Otherwise non-ASCII filenames in existing repositories would be |
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116 | 116 | # corrupted. |
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117 | 117 | # This must be set once prior to any fsencode/fsdecode calls. |
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118 | 118 | sys._enablelegacywindowsfsencoding() # pytype: disable=module-attr |
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119 | 119 | |
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120 | 120 | fsencode = os.fsencode |
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121 | 121 | fsdecode = os.fsdecode |
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122 | 122 | oscurdir: bytes = os.curdir.encode('ascii') |
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123 | 123 | oslinesep: bytes = os.linesep.encode('ascii') |
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124 | 124 | osname: bytes = os.name.encode('ascii') |
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125 | 125 | ospathsep: bytes = os.pathsep.encode('ascii') |
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126 | 126 | ospardir: bytes = os.pardir.encode('ascii') |
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127 | 127 | ossep: bytes = os.sep.encode('ascii') |
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128 | 128 | osaltsep: Optional[bytes] = os.altsep.encode('ascii') if os.altsep else None |
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129 | 129 | osdevnull: bytes = os.devnull.encode('ascii') |
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130 | 130 | |
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131 | 131 | sysplatform: bytes = sys.platform.encode('ascii') |
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132 | 132 | sysexecutable: bytes = os.fsencode(sys.executable) if sys.executable else b'' |
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133 | 133 | |
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134 | 134 | |
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135 | 135 | if TYPE_CHECKING: |
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136 | 136 | |
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137 | 137 | @overload |
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138 | 138 | def maplist(f: Callable[[_T0], _S], arg: Iterable[_T0]) -> List[_S]: |
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139 | 139 | ... |
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140 | 140 | |
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141 | 141 | @overload |
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142 | 142 | def maplist( |
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143 | 143 | f: Callable[[_T0, _T1], _S], arg1: Iterable[_T0], arg2: Iterable[_T1] |
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144 | 144 | ) -> List[_S]: |
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145 | 145 | ... |
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146 | 146 | |
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147 | 147 | |
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148 | 148 | def maplist(f, *args): |
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149 | 149 | return list(map(f, *args)) |
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150 | 150 | |
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151 | 151 | |
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152 | 152 | def rangelist(*args) -> List[int]: |
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153 | 153 | return list(range(*args)) |
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154 | 154 | |
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155 | 155 | |
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156 | 156 | def ziplist(*args): |
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157 | 157 | return list(zip(*args)) |
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158 | 158 | |
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159 | 159 | |
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160 | 160 | rawinput = input |
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161 | 161 | getargspec = inspect.getfullargspec |
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162 | 162 | |
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163 | 163 | long = int |
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164 | 164 | |
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165 | 165 | if builtins.getattr(sys, 'argv', None) is not None: |
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166 | 166 | # On POSIX, the char** argv array is converted to Python str using |
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167 | 167 | # Py_DecodeLocale(). The inverse of this is Py_EncodeLocale(), which |
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168 | 168 | # isn't directly callable from Python code. In practice, os.fsencode() |
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169 | 169 | # can be used instead (this is recommended by Python's documentation |
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170 | 170 | # for sys.argv). |
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171 | 171 | # |
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172 | 172 | # On Windows, the wchar_t **argv is passed into the interpreter as-is. |
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173 | 173 | # Like POSIX, we need to emulate what Py_EncodeLocale() would do. But |
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174 | 174 | # there's an additional wrinkle. What we really want to access is the |
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175 | 175 | # ANSI codepage representation of the arguments, as this is what |
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176 | 176 | # `int main()` would receive if Python 3 didn't define `int wmain()` |
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177 | 177 | # (this is how Python 2 worked). To get that, we encode with the mbcs |
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178 | 178 | # encoding, which will pass CP_ACP to the underlying Windows API to |
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179 | 179 | # produce bytes. |
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180 | 180 | sysargv: List[bytes] = [] |
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181 | 181 | if os.name == r'nt': |
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182 | 182 | sysargv = [a.encode("mbcs", "ignore") for a in sys.argv] |
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183 | 183 | else: |
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184 | 184 | sysargv = [fsencode(a) for a in sys.argv] |
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185 | 185 | |
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186 | 186 | bytechr = struct.Struct('>B').pack |
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187 | 187 | byterepr = b'%r'.__mod__ |
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188 | 188 | |
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189 | 189 | |
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190 | 190 | class bytestr(bytes): |
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191 | 191 | """A bytes which mostly acts as a Python 2 str |
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192 | 192 | |
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193 | 193 | >>> bytestr(), bytestr(bytearray(b'foo')), bytestr(u'ascii'), bytestr(1) |
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194 | 194 | ('', 'foo', 'ascii', '1') |
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195 | 195 | >>> s = bytestr(b'foo') |
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196 | 196 | >>> assert s is bytestr(s) |
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197 | 197 | |
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198 | 198 | __bytes__() should be called if provided: |
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199 | 199 | |
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200 | 200 | >>> class bytesable: |
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201 | 201 | ... def __bytes__(self): |
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202 | 202 | ... return b'bytes' |
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203 | 203 | >>> bytestr(bytesable()) |
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204 | 204 | 'bytes' |
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205 | 205 | |
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206 | 206 | There's no implicit conversion from non-ascii str as its encoding is |
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207 | 207 | unknown: |
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208 | 208 | |
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209 | 209 | >>> bytestr(chr(0x80)) # doctest: +ELLIPSIS |
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210 | 210 | Traceback (most recent call last): |
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211 | 211 | ... |
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212 | 212 | UnicodeEncodeError: ... |
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213 | 213 | |
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214 | 214 | Comparison between bytestr and bytes should work: |
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215 | 215 | |
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216 | 216 | >>> assert bytestr(b'foo') == b'foo' |
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217 | 217 | >>> assert b'foo' == bytestr(b'foo') |
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218 | 218 | >>> assert b'f' in bytestr(b'foo') |
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219 | 219 | >>> assert bytestr(b'f') in b'foo' |
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220 | 220 | |
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221 | 221 | Sliced elements should be bytes, not integer: |
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222 | 222 | |
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223 | 223 | >>> s[1], s[:2] |
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224 | 224 | (b'o', b'fo') |
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225 | 225 | >>> list(s), list(reversed(s)) |
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226 | 226 | ([b'f', b'o', b'o'], [b'o', b'o', b'f']) |
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227 | 227 | |
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228 | 228 | As bytestr type isn't propagated across operations, you need to cast |
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229 | 229 | bytes to bytestr explicitly: |
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230 | 230 | |
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231 | 231 | >>> s = bytestr(b'foo').upper() |
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232 | 232 | >>> t = bytestr(s) |
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233 | 233 | >>> s[0], t[0] |
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234 | 234 | (70, b'F') |
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235 | 235 | |
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236 | 236 | Be careful to not pass a bytestr object to a function which expects |
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237 | 237 | bytearray-like behavior. |
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238 | 238 | |
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239 | 239 | >>> t = bytes(t) # cast to bytes |
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240 | 240 | >>> assert type(t) is bytes |
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241 | 241 | """ |
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242 | 242 | |
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243 | 243 | # Trick pytype into not demanding Iterable[int] be passed to __new__(), |
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244 | 244 | # since the appropriate bytes format is done internally. |
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245 | 245 | # |
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246 | 246 | # https://github.com/google/pytype/issues/500 |
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247 | 247 | if TYPE_CHECKING: |
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248 | 248 | |
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249 | 249 | def __init__(self, s: object = b'') -> None: |
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250 | 250 | pass |
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251 | 251 | |
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252 | 252 | def __new__(cls: Type[_Tbytestr], s: object = b'') -> _Tbytestr: |
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253 | 253 | if isinstance(s, bytestr): |
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254 | 254 | return s |
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255 | 255 | if not isinstance( |
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256 | 256 | s, (bytes, bytearray) |
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257 | 257 | ) and not builtins.hasattr( # hasattr-py3-only |
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258 | 258 | s, u'__bytes__' |
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259 | 259 | ): |
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260 | 260 | s = str(s).encode('ascii') |
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261 | 261 | return bytes.__new__(cls, s) |
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262 | 262 | |
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263 | 263 | # The base class uses `int` return in py3, but the point of this class is to |
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264 | 264 | # behave like py2. |
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265 | 265 | def __getitem__(self, key) -> bytes: # pytype: disable=signature-mismatch |
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266 | 266 | s = bytes.__getitem__(self, key) |
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267 | 267 | if not isinstance(s, bytes): |
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268 | 268 | s = bytechr(s) |
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269 | 269 | return s |
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270 | 270 | |
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271 | 271 | # The base class expects `Iterator[int]` return in py3, but the point of |
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272 | 272 | # this class is to behave like py2. |
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273 | 273 | def __iter__(self) -> Iterator[bytes]: # pytype: disable=signature-mismatch |
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274 | 274 | return iterbytestr(bytes.__iter__(self)) |
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275 | 275 | |
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276 | 276 | def __repr__(self) -> str: |
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277 | 277 | return bytes.__repr__(self)[1:] # drop b'' |
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278 | 278 | |
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279 | 279 | |
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280 | 280 | def iterbytestr(s: Iterable[int]) -> Iterator[bytes]: |
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281 | 281 | """Iterate bytes as if it were a str object of Python 2""" |
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282 | 282 | return map(bytechr, s) |
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283 | 283 | |
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284 | 284 | |
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285 | 285 | if TYPE_CHECKING: |
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286 | 286 | |
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287 | 287 | @overload |
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288 | 288 | def maybebytestr(s: bytes) -> bytestr: |
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289 | 289 | ... |
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290 | 290 | |
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291 | 291 | @overload |
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292 | 292 | def maybebytestr(s: _T0) -> _T0: |
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293 | 293 | ... |
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294 | 294 | |
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295 | 295 | |
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296 | 296 | def maybebytestr(s): |
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297 | 297 | """Promote bytes to bytestr""" |
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298 | 298 | if isinstance(s, bytes): |
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299 | 299 | return bytestr(s) |
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300 | 300 | return s |
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301 | 301 | |
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302 | 302 | |
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303 | 303 | def sysbytes(s: AnyStr) -> bytes: |
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304 | 304 | """Convert an internal str (e.g. keyword, __doc__) back to bytes |
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305 | 305 | |
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306 | 306 | This never raises UnicodeEncodeError, but only ASCII characters |
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307 | 307 | can be round-trip by sysstr(sysbytes(s)). |
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308 | 308 | """ |
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309 | 309 | if isinstance(s, bytes): |
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310 | 310 | return s |
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311 | 311 | return s.encode('utf-8') |
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312 | 312 | |
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313 | 313 | |
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314 | 314 | def sysstr(s: AnyStr) -> str: |
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315 | 315 | """Return a keyword str to be passed to Python functions such as |
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316 | 316 | getattr() and str.encode() |
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317 | 317 | |
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318 | 318 | This never raises UnicodeDecodeError. Non-ascii characters are |
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319 | 319 | considered invalid and mapped to arbitrary but unique code points |
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320 | 320 | such that 'sysstr(a) != sysstr(b)' for all 'a != b'. |
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321 | 321 | """ |
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322 | 322 | if isinstance(s, builtins.str): |
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323 | 323 | return s |
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324 | 324 | return s.decode('latin-1') |
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325 | 325 | |
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326 | 326 | |
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327 | 327 | def strurl(url: AnyStr) -> str: |
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328 | 328 | """Converts a bytes url back to str""" |
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329 | 329 | if isinstance(url, bytes): |
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330 | 330 | return url.decode('ascii') |
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331 | 331 | return url |
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332 | 332 | |
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333 | 333 | |
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334 | 334 | def bytesurl(url: AnyStr) -> bytes: |
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335 | 335 | """Converts a str url to bytes by encoding in ascii""" |
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336 | 336 | if isinstance(url, str): |
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337 | 337 | return url.encode('ascii') |
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338 | 338 | return url |
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339 | 339 | |
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340 | 340 | |
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341 | 341 | def raisewithtb(exc: BaseException, tb) -> NoReturn: |
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342 | 342 | """Raise exception with the given traceback""" |
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343 | 343 | raise exc.with_traceback(tb) |
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344 | 344 | |
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345 | 345 | |
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346 | 346 | def getdoc(obj: object) -> Optional[bytes]: |
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347 | 347 | """Get docstring as bytes; may be None so gettext() won't confuse it |
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348 | 348 | with _('')""" |
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349 | 349 | doc = builtins.getattr(obj, '__doc__', None) |
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350 | 350 | if doc is None: |
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351 | 351 | return doc |
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352 | 352 | return sysbytes(doc) |
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353 | 353 | |
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354 | 354 | |
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355 | 355 | def _wrapattrfunc(f): |
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356 | 356 | @functools.wraps(f) |
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357 | 357 | def w(object, name, *args): |
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358 | if isinstance(name, bytes): | |
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359 | from . import util | |
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360 | ||
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361 | msg = b'function "%s" take `str` as argument, not `bytes`' | |
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362 | fname = f.__name__.encode('ascii') | |
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363 | msg %= fname | |
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364 | util.nouideprecwarn(msg, b"6.6", stacklevel=2) | |
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358 | 365 | return f(object, sysstr(name), *args) |
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359 | 366 | |
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360 | 367 | return w |
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361 | 368 | |
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362 | 369 | |
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363 | 370 | # these wrappers are automagically imported by hgloader |
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364 | 371 | delattr = _wrapattrfunc(builtins.delattr) |
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365 | 372 | getattr = _wrapattrfunc(builtins.getattr) |
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366 | 373 | hasattr = _wrapattrfunc(builtins.hasattr) |
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367 | 374 | setattr = _wrapattrfunc(builtins.setattr) |
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368 | 375 | xrange = builtins.range |
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369 | 376 | unicode = str |
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370 | 377 | |
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371 | 378 | |
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372 | 379 | def open( |
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373 | 380 | name, |
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374 | 381 | mode: AnyStr = b'r', |
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375 | 382 | buffering: int = -1, |
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376 | 383 | encoding: Optional[str] = None, |
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377 | 384 | ) -> Any: |
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378 | 385 | # TODO: assert binary mode, and cast result to BinaryIO? |
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379 | 386 | return builtins.open(name, sysstr(mode), buffering, encoding) |
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380 | 387 | |
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381 | 388 | |
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382 | 389 | safehasattr = _wrapattrfunc(builtins.hasattr) |
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383 | 390 | |
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384 | 391 | |
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385 | 392 | def _getoptbwrapper( |
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386 | 393 | orig, args: Sequence[bytes], shortlist: bytes, namelist: Sequence[bytes] |
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387 | 394 | ) -> _GetOptResult: |
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388 | 395 | """ |
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389 | 396 | Takes bytes arguments, converts them to unicode, pass them to |
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390 | 397 | getopt.getopt(), convert the returned values back to bytes and then |
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391 | 398 | return them for Python 3 compatibility as getopt.getopt() don't accepts |
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392 | 399 | bytes on Python 3. |
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393 | 400 | """ |
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394 | 401 | args = [a.decode('latin-1') for a in args] |
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395 | 402 | shortlist = shortlist.decode('latin-1') |
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396 | 403 | namelist = [a.decode('latin-1') for a in namelist] |
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397 | 404 | opts, args = orig(args, shortlist, namelist) |
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398 | 405 | opts = [(a[0].encode('latin-1'), a[1].encode('latin-1')) for a in opts] |
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399 | 406 | args = [a.encode('latin-1') for a in args] |
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400 | 407 | return opts, args |
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401 | 408 | |
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402 | 409 | |
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403 | 410 | def strkwargs(dic: Mapping[bytes, _T0]) -> Dict[str, _T0]: |
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404 | 411 | """ |
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405 | 412 | Converts the keys of a python dictonary to str i.e. unicodes so that |
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406 | 413 | they can be passed as keyword arguments as dictionaries with bytes keys |
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407 | 414 | can't be passed as keyword arguments to functions on Python 3. |
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408 | 415 | """ |
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409 | 416 | dic = {k.decode('latin-1'): v for k, v in dic.items()} |
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410 | 417 | return dic |
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411 | 418 | |
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412 | 419 | |
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413 | 420 | def byteskwargs(dic: Mapping[str, _T0]) -> Dict[bytes, _T0]: |
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414 | 421 | """ |
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415 | 422 | Converts keys of python dictionaries to bytes as they were converted to |
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416 | 423 | str to pass that dictonary as a keyword argument on Python 3. |
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417 | 424 | """ |
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418 | 425 | dic = {k.encode('latin-1'): v for k, v in dic.items()} |
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419 | 426 | return dic |
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420 | 427 | |
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421 | 428 | |
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422 | 429 | # TODO: handle shlex.shlex(). |
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423 | 430 | def shlexsplit( |
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424 | 431 | s: bytes, comments: bool = False, posix: bool = True |
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425 | 432 | ) -> List[bytes]: |
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426 | 433 | """ |
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427 | 434 | Takes bytes argument, convert it to str i.e. unicodes, pass that into |
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428 | 435 | shlex.split(), convert the returned value to bytes and return that for |
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429 | 436 | Python 3 compatibility as shelx.split() don't accept bytes on Python 3. |
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430 | 437 | """ |
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431 | 438 | ret = shlex.split(s.decode('latin-1'), comments, posix) |
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432 | 439 | return [a.encode('latin-1') for a in ret] |
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433 | 440 | |
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434 | 441 | |
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435 | 442 | iteritems = lambda x: x.items() |
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436 | 443 | itervalues = lambda x: x.values() |
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437 | 444 | |
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438 | 445 | json_loads = json.loads |
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439 | 446 | |
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440 | 447 | isjython: bool = sysplatform.startswith(b'java') |
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441 | 448 | |
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442 | 449 | isdarwin: bool = sysplatform.startswith(b'darwin') |
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443 | 450 | islinux: bool = sysplatform.startswith(b'linux') |
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444 | 451 | isposix: bool = osname == b'posix' |
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445 | 452 | iswindows: bool = osname == b'nt' |
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446 | 453 | |
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447 | 454 | |
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448 | 455 | def getoptb( |
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449 | 456 | args: Sequence[bytes], shortlist: bytes, namelist: Sequence[bytes] |
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450 | 457 | ) -> _GetOptResult: |
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451 | 458 | return _getoptbwrapper(getopt.getopt, args, shortlist, namelist) |
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452 | 459 | |
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453 | 460 | |
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454 | 461 | def gnugetoptb( |
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455 | 462 | args: Sequence[bytes], shortlist: bytes, namelist: Sequence[bytes] |
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456 | 463 | ) -> _GetOptResult: |
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457 | 464 | return _getoptbwrapper(getopt.gnu_getopt, args, shortlist, namelist) |
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458 | 465 | |
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459 | 466 | |
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460 | 467 | def mkdtemp( |
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461 | 468 | suffix: bytes = b'', prefix: bytes = b'tmp', dir: Optional[bytes] = None |
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462 | 469 | ) -> bytes: |
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463 | 470 | return tempfile.mkdtemp(suffix, prefix, dir) |
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464 | 471 | |
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465 | 472 | |
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466 | 473 | # text=True is not supported; use util.from/tonativeeol() instead |
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467 | 474 | def mkstemp( |
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468 | 475 | suffix: bytes = b'', prefix: bytes = b'tmp', dir: Optional[bytes] = None |
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469 | 476 | ) -> Tuple[int, bytes]: |
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470 | 477 | return tempfile.mkstemp(suffix, prefix, dir) |
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471 | 478 | |
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472 | 479 | |
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473 | 480 | # TemporaryFile does not support an "encoding=" argument on python2. |
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474 | 481 | # This wrapper file are always open in byte mode. |
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475 | 482 | def unnamedtempfile(mode: Optional[bytes] = None, *args, **kwargs) -> BinaryIO: |
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476 | 483 | if mode is None: |
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477 | 484 | mode = 'w+b' |
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478 | 485 | else: |
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479 | 486 | mode = sysstr(mode) |
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480 | 487 | assert 'b' in mode |
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481 | 488 | return cast(BinaryIO, tempfile.TemporaryFile(mode, *args, **kwargs)) |
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482 | 489 | |
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483 | 490 | |
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484 | 491 | # NamedTemporaryFile does not support an "encoding=" argument on python2. |
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485 | 492 | # This wrapper file are always open in byte mode. |
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486 | 493 | def namedtempfile( |
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487 | 494 | mode: bytes = b'w+b', |
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488 | 495 | bufsize: int = -1, |
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489 | 496 | suffix: bytes = b'', |
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490 | 497 | prefix: bytes = b'tmp', |
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491 | 498 | dir: Optional[bytes] = None, |
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492 | 499 | delete: bool = True, |
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493 | 500 | ): |
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494 | 501 | mode = sysstr(mode) |
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495 | 502 | assert 'b' in mode |
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496 | 503 | return tempfile.NamedTemporaryFile( |
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497 | 504 | mode, bufsize, suffix=suffix, prefix=prefix, dir=dir, delete=delete |
|
498 | 505 | ) |
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