Mercurial > hgrepos > Python > apps > py-cutils
annotate cutils/util/walk.py @ 198:c1e875ba4bdc
Put the effective filesystem encoding into the treesum digest file using FSENCODING = <encoding>
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Thu, 16 Jan 2025 23:18:04 +0100 |
| parents | 0f4febf646f5 |
| children | b2aba84ca426 |
| rev | line source |
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A heavily customized "os.walk()" alike to support the coming treeview implementation
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1 # -*- coding: utf-8 -*- |
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2 # :- |
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3 # :Copyright: (c) 2020-2025 Franz Glasner |
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4 # :License: BSD-3-Clause |
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5 # :- |
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6 r"""Utility sub-module to implement a heavily customized :func:`os.walk`. |
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7 |
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8 """ |
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9 |
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10 from __future__ import print_function, absolute_import |
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11 |
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12 |
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Put the effective filesystem encoding into the treesum digest file using FSENCODING = <encoding>
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13 __all__ = ["ScanDir", "getfsencoding"] |
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14 |
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15 |
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16 import os |
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17 try: |
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18 from os import scandir |
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19 except ImportError: |
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20 try: |
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21 from scandir import scandir |
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22 except ImportError: |
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23 scandir = None |
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Put the effective filesystem encoding into the treesum digest file using FSENCODING = <encoding>
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24 import sys |
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25 |
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Move PY2 from cutils.util.constants into cutils.util
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26 from . import PY2 |
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27 |
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28 |
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29 _FSENCODING = sys.getfilesystemencoding() |
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30 |
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31 |
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32 class WalkDirEntry(object): |
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33 |
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34 """A :class:`os.DirEntry` alike to be used in :func:`walk` and for |
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35 its results. |
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36 |
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37 """ |
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38 |
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39 __slots__ = ("_name", "_fsname", "_path", "_fspath", "_is_symlink", |
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40 "_is_dir", "_stat_result") |
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41 |
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42 def __init__(self, name): |
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43 self._name = name |
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44 if PY2: |
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45 assert isinstance(name, bytes) |
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46 self._fsname = name |
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47 else: |
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48 self._name = name |
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49 self._fsname = os.fsencode(name) |
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50 self._path = None |
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51 self._fspath = None |
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52 self._is_symlink = self._is_dir = self._stat_result = None |
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53 |
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54 @property |
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55 def name(self): |
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56 """The native name""" |
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57 return self._name |
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58 |
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59 @property |
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60 def fsname(self): |
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61 """The name as bytes""" |
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62 return self._fsname |
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63 |
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64 @property |
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65 def path(self): |
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66 """Always native""" |
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67 return self._path |
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68 |
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69 @property |
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70 def fspath(self): |
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71 """Always bytes""" |
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72 if self._path is not None: |
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73 if self._fspath is None: |
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74 if PY2: |
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75 assert isinstance(self._path, bytes) |
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76 self._fspath = self._path |
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77 else: |
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78 self._fspath = os.fsencode(self._path) |
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79 return self._fspath |
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80 |
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81 @property |
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82 def is_symlink(self): |
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83 return self._is_symlink |
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84 |
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85 @property |
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86 def is_dir(self): |
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87 return self._is_dir |
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88 |
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89 @property |
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90 def stat(self): |
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91 return self._stat_result |
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92 |
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93 def __repr__(self): |
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94 tag = "" |
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95 if self._is_symlink: |
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96 tag += "l" |
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97 if self._is_dir: |
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98 tag += "d" |
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99 if tag: |
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100 return "<WalkDirEntry %r (%s)>" % (self._name, tag) |
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101 return "<WalkDirEntry %r>" % (self._name,) |
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102 |
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103 @classmethod |
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104 def from_direntry(cls_, entry): |
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105 w = cls_(entry.name) |
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106 w._path = entry.path |
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107 try: |
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108 w._is_dir = entry.is_dir(follow_symlinks=True) |
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109 except OSError: |
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110 # |
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111 # If is_dir() raises an OSError, consider that the entry |
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112 # is not a directory, same behaviour than os.path.isdir(). |
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113 # |
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114 w._is_dir = False |
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115 try: |
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116 w._is_symlink = entry.is_symlink() |
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117 except OSError: |
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118 # |
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119 # If is_symlink() raises an OSError, consider that the entry |
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120 # is not a symbolic link, same behaviour than os.path.islink(). |
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121 # |
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122 w._is_symlink = False |
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156
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123 # Do not supress errors here and (consistently) follow symlinks |
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124 w._stat_result = entry.stat(follow_symlinks=True) |
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125 return w |
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126 |
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162
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127 @classmethod |
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128 def from_path_name(cls_, path, name): |
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129 w = cls_(name) |
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130 w._path = os.path.join(path, name) |
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131 try: |
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132 w._is_dir = os.path.isdir(w._path) |
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133 except OSError: |
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134 # |
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135 # If is_dir() raises an OSError, consider that the entry |
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136 # is not a directory, same behaviour than os.path.isdir(). |
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137 # |
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138 w._is_dir = False |
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139 try: |
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140 w._is_symlink = os.path.islink(w._path) |
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141 except OSError: |
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142 # |
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143 # If is_symlink() raises an OSError, consider that the entry |
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144 # is not a symbolic link, same behaviour than os.path.islink(). |
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145 # |
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146 w._is_symlink = False |
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147 w._stat_result = os.stat(w._path) |
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148 return w |
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149 |
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121
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150 @staticmethod |
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151 def sort_key(entry): |
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152 return entry._fsname |
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153 |
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154 |
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155 if scandir: |
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156 |
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178
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157 class ScanDir(object): |
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158 |
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159 """An :func:`os.scandir` wrapper that is always an iterator and |
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160 a context manager. |
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161 |
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162 """ |
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163 |
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164 __slots__ = ("_scandir_it", ) |
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165 |
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166 def __init__(self, path): |
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167 super(ScanDir, self).__init__() |
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195
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168 self._scandir_it = scandir(path) |
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169 |
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170 def __iter__(self): |
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171 return self |
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172 |
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173 def __next__(self): |
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174 return WalkDirEntry.from_direntry(next(self._scandir_it)) |
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175 |
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176 if PY2: |
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177 next = __next__ |
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178 |
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179 def __enter__(self): |
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180 return self |
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181 |
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182 def __exit__(self, *args, **kwds): |
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183 if hasattr(self._scandir_it, "close"): |
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184 self._scandir_it.close() |
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185 |
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186 else: |
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187 |
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178
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188 class ScanDir(object): |
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189 |
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190 """An :func:`os.scandir` wrapper that is always an iterator and |
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191 a context manager. |
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192 |
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193 """ |
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194 |
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195 __slots__ = ("_listdir_it", "_path") |
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196 |
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197 def __init__(self, path): |
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198 super(ScanDir, self).__init__() |
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199 self._listdir_it = iter(os.listdir(path)) |
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200 self._path = path |
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201 |
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202 def __iter__(self): |
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203 return self |
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204 |
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205 def __next__(self): |
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206 return WalkDirEntry.from_path_name(self._path, |
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207 next(self._listdir_it)) |
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208 |
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209 if PY2: |
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210 next = __next__ |
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211 |
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212 def __enter__(self): |
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213 return self |
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214 |
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215 def __exit__(self, *args, **kwds): |
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216 pass |
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217 |
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218 |
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219 def getfsencoding(): |
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220 """Return the stored _FSENCODING of this module""" |
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221 return _FSENCODING |