Mercurial > hgrepos > Python > apps > py-cutils

annotate cutils/util/fnmatch.py @ 308:652870b20f9e

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treesum: Implement --accept-treesum: trust a treesum-file for a directory checksum
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 08 Mar 2025 04:49:06 +0100
parents 6c212e407524
children f5f54b9c3552
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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"""File name matching.
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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
302
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13 __all__ = ["FnMatcher"]
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14
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15
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16 import re
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17
308
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18 from . import PY2
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19 from . import glob
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22 HELP_DESCRIPTION = """\
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23 PATTERNs
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24 ========
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25
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26 glob: case-sensitive, anchored at the begin and end
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27 iglob: case-insensitive variant of "glob"
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28 re: regular expression
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29 path: plain text example (rooted), can be a file or a directory or a prefix
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30 thereof
302
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31 fullpath: exactly a single full path (file or directory), relative to the
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32 root of the tree
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33
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34 """
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35
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36
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37 def glob_factory(pattern):
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38
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39 cpat = re.compile(
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40 # automatically anchored
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41 "\\A{}\\Z".format(glob.glob_to_regexp(pattern)),
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42 re.DOTALL)
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43
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44 def _glob_matcher(s):
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45 return cpat.search(s) is not None
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46
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47 return _glob_matcher
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49
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50 def iglob_factory(pattern):
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51
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52 cpat = re.compile(
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53 # automatically anchored
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54 "\\A{}\\Z".format(glob.glob_to_regexp(pattern)),
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55 re.DOTALL | re.IGNORECASE)
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56
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57 def _iglob_matcher(s):
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58 return cpat.search(s) is not None
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59
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60 return _iglob_matcher
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62
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63 def re_factory(pattern):
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64
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65 cpat = re.compile(pattern, re.DOTALL)
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66
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67 def _re_matcher(s):
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68 return cpat.search(s) is not None
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69
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70 return _re_matcher
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72
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73 def path_factory(pattern):
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74
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75 def _path_matcher(s):
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76 return s.startswith(pattern)
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77
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78 return _path_matcher
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79
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80
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81 def fullpath_factory(pattern):
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82
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83 def _fullpath_matcher(s):
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84 return s == pattern
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85
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86 return _fullpath_matcher
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87
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88
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89 class FnMatcher(object):
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90
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91 _registry = {
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92 "glob": glob_factory,
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93 "iglob": iglob_factory,
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94 "re": re_factory,
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95 "path": path_factory,
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96 "fullpath": fullpath_factory,
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97 }
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98
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99 def __init__(self, matchers):
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100 super(FnMatcher, self).__init__()
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101 self._matchers = matchers
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102
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103 @classmethod
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104 def build_from_commandline_patterns(klass, filter_definitions):
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105 matchers = []
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106 if filter_definitions:
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107 for action, kpattern in filter_definitions:
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108 assert action in ("include", "exclude", "accept-treesum")
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109 kind, sep, pattern = kpattern.partition(':')
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110 if not sep:
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111 # use the default
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112 kind = "glob"
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113 pattern = kpattern
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114 factory = klass._registry.get(kind, None)
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115 if not factory:
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116 raise RuntimeError("unknown pattern kind: {}".format(kind))
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117 matchers.append((action, kind, factory(pattern), pattern))
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118 return klass(matchers)
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119
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120 def shall_visit(self, fn, default=True):
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121 visit = default
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122 for action, kind, matcher, orig_pattern in self._matchers:
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123 if matcher(fn):
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124 if action == "include":
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125 visit = True
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126 elif action in ("exclude", "accept-treesum"):
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127 visit = False
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128 else:
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129 raise RuntimeError("unknown action: {}".format(action))
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130 return visit
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131
308
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132 def shall_accept_treesum(self, fn, default=False):
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133 accept = default
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134 for action, kind, matcher, orig_pattern in self._matchers:
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135 if action == "accept-treesum":
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136 if matcher(fn):
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137 accept = True
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138 elif action in ("include", "exclude"):
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139 pass
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140 else:
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141 raise RuntimeError("unknown action: {}".format(action))
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142 return accept
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143
302
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144 def definitions(self):
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145 for action, kind, matcher, orig_pattern in self._matchers:
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146 yield (action, kind, orig_pattern)
308
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147
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148 def __bool__(self):
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149 return bool(self._matchers)
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150
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151 if PY2:
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152 __nonzero__ = __bool__