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annotate mercurial/configuration/rcutil.py @ 52456:3e79ca017157

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config: gather constant and type into the `__init__.py` This will help using them in multiple files.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Wed, 23 Oct 2024 00:43:17 +0200
parents e3b45916c375
children 22129ce9f86d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 )
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17
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18 from .. import (
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19 configuration as conf_mod,
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20 encoding,
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21 localrepo,
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22 pycompat,
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23 requirements as requirementsmod,
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24 util,
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25 vfs,
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26 )
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27
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28 from ..utils import resourceutil
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29
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30 if pycompat.iswindows:
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31 from .. import scmwindows as scmplatform
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32 else:
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33 from .. import scmposix as scmplatform
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34
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35 fallbackpager = scmplatform.fallbackpager
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36 systemrcpath = scmplatform.systemrcpath
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37 userrcpath = scmplatform.userrcpath
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38
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39 ComponentT = conf_mod.ComponentT
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40 ConfigItemT = conf_mod.ConfigItemT
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41 FileRCT = conf_mod.FileRCT
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42 ResourceIDT = conf_mod.ResourceIDT
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43
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44
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45 def _expandrcpath(path: bytes) -> List[FileRCT]:
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46 '''path could be a file or a directory. return a list of file paths'''
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47 p = util.expandpath(path)
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48 if os.path.isdir(p):
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49 join = os.path.join
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50 return sorted(
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51 join(p, f) for f, k in util.listdir(p) if f.endswith(b'.rc')
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52 )
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53 return [p]
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54
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55
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56 def envrcitems(env: Optional[Dict[bytes, bytes]] = None) -> List[ConfigItemT]:
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57 """Return [(section, name, value, source)] config items.
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58
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59 The config items are extracted from environment variables specified by env,
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60 used to override systemrc, but not userrc.
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61
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62 If env is not provided, encoding.environ will be used.
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63 """
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64 if env is None:
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65 env = encoding.environ
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66 checklist = [
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67 (b'EDITOR', b'ui', b'editor'),
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68 (b'VISUAL', b'ui', b'editor'),
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69 (b'PAGER', b'pager', b'pager'),
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70 ]
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71 result = []
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72 for envname, section, configname in checklist:
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73 if envname not in env:
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74 continue
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75 result.append((section, configname, env[envname], b'$%s' % envname))
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76 return result
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77
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78
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79 def default_rc_resources() -> List[ResourceIDT]:
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80 """return rc resource IDs in defaultrc"""
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81 rsrcs = resourceutil.contents(b'mercurial.defaultrc')
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82 return [
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83 (b'mercurial.defaultrc', r)
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84 for r in sorted(rsrcs)
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85 if resourceutil.is_resource(b'mercurial.defaultrc', r)
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86 and r.endswith(b'.rc')
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87 ]
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88
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89
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90 def rccomponents() -> List[ComponentT]:
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91 """return an ordered [(type, obj)] about where to load configs.
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92
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93 respect $HGRCPATH. if $HGRCPATH is empty, only .hg/hgrc of current repo is
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94 used. if $HGRCPATH is not set, the platform default will be used.
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95
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96 if a directory is provided, *.rc files under it will be used.
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97
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98 type could be either 'path', 'items' or 'resource'. If type is 'path',
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99 obj is a string, and is the config file path. if type is 'items', obj is a
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100 list of (section, name, value, source) that should fill the config directly.
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101 If type is 'resource', obj is a tuple of (package name, resource name).
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102 """
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103 envrc = (b'items', envrcitems())
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104
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105 if b'HGRCPATH' in encoding.environ:
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106 # assume HGRCPATH is all about user configs so environments can be
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107 # overridden.
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108 _rccomponents = [envrc]
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109 for p in encoding.environ[b'HGRCPATH'].split(pycompat.ospathsep):
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110 if not p:
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111 continue
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112 _rccomponents.extend((b'path', p) for p in _expandrcpath(p))
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113 else:
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114 _rccomponents = [(b'resource', r) for r in default_rc_resources()]
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115
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116 normpaths = lambda paths: [
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117 (b'path', os.path.normpath(p)) for p in paths
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118 ]
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119 _rccomponents.extend(normpaths(systemrcpath()))
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120 _rccomponents.append(envrc)
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121 _rccomponents.extend(normpaths(userrcpath()))
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122 return _rccomponents
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123
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124
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125 def _shared_source_component(path: bytes) -> List[FileRCT]:
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126 """if the current repository is shared one, this tries to read
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127 .hg/hgrc of shared source if we are in share-safe mode
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128
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129 This should be called before reading .hg/hgrc or the main repo
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130 as that overrides config set in shared source"""
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131 try:
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132 with open(os.path.join(path, b".hg", b"requires"), "rb") as fp:
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133 requirements = set(fp.read().splitlines())
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134 if not (
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135 requirementsmod.SHARESAFE_REQUIREMENT in requirements
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136 and requirementsmod.SHARED_REQUIREMENT in requirements
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137 ):
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138 return []
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139 hgvfs = vfs.vfs(os.path.join(path, b".hg"))
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140 sharedvfs = localrepo._getsharedvfs(hgvfs, requirements)
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141 return [sharedvfs.join(b"hgrc")]
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142 except IOError:
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143 pass
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144 return []
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145
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146
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147 def repo_components(repo_path: bytes) -> List[ComponentT]:
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148 """return the list of config file to read for a repository"""
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149 components = []
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150 components.extend(_shared_source_component(repo_path))
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151 components.append(os.path.join(repo_path, b".hg", b"hgrc"))
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152 components.append(os.path.join(repo_path, b".hg", b"hgrc-not-shared"))
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153 return [(b'path', c) for c in components]
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154
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155
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156 def defaultpagerenv() -> Dict[bytes, bytes]:
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157 """return a dict of default environment variables and their values,
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158 intended to be set before starting a pager.
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159 """
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160 return {b'LESS': b'FRX', b'LV': b'-c'}
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161
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162
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163 def use_repo_hgrc() -> bool:
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164 """True if repositories `.hg/hgrc` config should be read"""
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165 return b'HGRCSKIPREPO' not in encoding.environ