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annotate mercurial/configuration/rcutil.py @ 52451:91f22b89ea05

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config: type `rcutil` It helps to understand what is going on here and catch future errors.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 22 Oct 2024 17:23:28 +0200
parents 0a81f3ef054c
children 0b791c90280a
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1 # rcutil.py - utilities about config paths, special config sections etc.
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2 #
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3 # Copyright Mercurial Contributors
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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 from __future__ import annotations
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9
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10 import os
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11
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12 from typing import (
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13 Dict,
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14 List,
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15 Optional,
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16 Tuple,
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17 Union,
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18 )
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19
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20 from .. import (
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21 encoding,
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22 pycompat,
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23 util,
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24 )
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25
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26 from ..utils import resourceutil
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27
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28 if pycompat.iswindows:
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29 from .. import scmwindows as scmplatform
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30 else:
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31 from .. import scmposix as scmplatform
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32
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33 fallbackpager = scmplatform.fallbackpager
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34 systemrcpath = scmplatform.systemrcpath
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35 userrcpath = scmplatform.userrcpath
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36
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37 ConfigItemT = Tuple[bytes, bytes, bytes, bytes]
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38 ResourceIDT = Tuple[bytes, bytes]
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39 FileRCT = bytes
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40 ComponentT = Tuple[
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41 bytes,
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42 Union[
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43 List[ConfigItemT],
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44 FileRCT,
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45 ResourceIDT,
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46 ],
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47 ]
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49
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50 def _expandrcpath(path: bytes) -> List[FileRCT]:
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51 '''path could be a file or a directory. return a list of file paths'''
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52 p = util.expandpath(path)
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53 if os.path.isdir(p):
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54 join = os.path.join
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55 return sorted(
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56 join(p, f) for f, k in util.listdir(p) if f.endswith(b'.rc')
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57 )
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58 return [p]
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59
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60
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61 def envrcitems(env: Optional[Dict[bytes, bytes]] = None) -> List[ConfigItemT]:
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62 """Return [(section, name, value, source)] config items.
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63
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64 The config items are extracted from environment variables specified by env,
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65 used to override systemrc, but not userrc.
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66
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67 If env is not provided, encoding.environ will be used.
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68 """
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69 if env is None:
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70 env = encoding.environ
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71 checklist = [
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72 (b'EDITOR', b'ui', b'editor'),
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73 (b'VISUAL', b'ui', b'editor'),
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74 (b'PAGER', b'pager', b'pager'),
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75 ]
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76 result = []
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77 for envname, section, configname in checklist:
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78 if envname not in env:
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79 continue
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80 result.append((section, configname, env[envname], b'$%s' % envname))
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81 return result
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82
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83
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84 def default_rc_resources() -> List[ResourceIDT]:
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85 """return rc resource IDs in defaultrc"""
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86 rsrcs = resourceutil.contents(b'mercurial.defaultrc')
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87 return [
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88 (b'mercurial.defaultrc', r)
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89 for r in sorted(rsrcs)
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90 if resourceutil.is_resource(b'mercurial.defaultrc', r)
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91 and r.endswith(b'.rc')
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92 ]
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93
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94
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95 def rccomponents() -> List[ComponentT]:
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96 """return an ordered [(type, obj)] about where to load configs.
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97
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98 respect $HGRCPATH. if $HGRCPATH is empty, only .hg/hgrc of current repo is
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99 used. if $HGRCPATH is not set, the platform default will be used.
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100
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101 if a directory is provided, *.rc files under it will be used.
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102
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103 type could be either 'path', 'items' or 'resource'. If type is 'path',
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104 obj is a string, and is the config file path. if type is 'items', obj is a
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105 list of (section, name, value, source) that should fill the config directly.
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106 If type is 'resource', obj is a tuple of (package name, resource name).
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107 """
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108 envrc = (b'items', envrcitems())
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109
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110 if b'HGRCPATH' in encoding.environ:
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111 # assume HGRCPATH is all about user configs so environments can be
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112 # overridden.
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113 _rccomponents = [envrc]
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114 for p in encoding.environ[b'HGRCPATH'].split(pycompat.ospathsep):
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115 if not p:
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116 continue
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117 _rccomponents.extend((b'path', p) for p in _expandrcpath(p))
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118 else:
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119 _rccomponents = [(b'resource', r) for r in default_rc_resources()]
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120
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121 normpaths = lambda paths: [
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122 (b'path', os.path.normpath(p)) for p in paths
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123 ]
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124 _rccomponents.extend(normpaths(systemrcpath()))
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125 _rccomponents.append(envrc)
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126 _rccomponents.extend(normpaths(userrcpath()))
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127 return _rccomponents
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128
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129
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130 def defaultpagerenv() -> Dict[bytes, bytes]:
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131 """return a dict of default environment variables and their values,
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e518192d6bac pager: set some environment variables if they're not set
Jun Wu <quark@fb.com>
parents: 31699
diff changeset
132 intended to be set before starting a pager.
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89a2afe31e82 formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents: 44160
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133 """
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687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43075
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134 return {b'LESS': b'FRX', b'LV': b'-c'}
44160
238790674d69 config: add a function in `rcutil` to abstract HGRCSKIPREPO
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 44034
diff changeset
135
238790674d69 config: add a function in `rcutil` to abstract HGRCSKIPREPO
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 44034
diff changeset
136
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 52447
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137 def use_repo_hgrc() -> bool:
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238790674d69 config: add a function in `rcutil` to abstract HGRCSKIPREPO
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 44034
diff changeset
138 """True if repositories `.hg/hgrc` config should be read"""
238790674d69 config: add a function in `rcutil` to abstract HGRCSKIPREPO
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 44034
diff changeset
139 return b'HGRCSKIPREPO' not in encoding.environ