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annotate mercurial/rcutil.py @ 31697:cf052cc5c2c2

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rcutil: do not cache rccomponents The function is only called once except for "hg debugconfig", where it is called twice. So there is no need to cache it. Caching it will cause issues with chgserver. Instead of dropping the cache in chgserver, it seems cleaner to just avoid the cache.
author Jun Wu <quark@fb.com>
date Tue, 28 Mar 2017 07:54:00 -0700
parents d83e51654c8a
children 67f0377bd24b
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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 absolute_import
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9
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10 import os
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11
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12 from . import (
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13 encoding,
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14 osutil,
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15 pycompat,
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16 util,
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17 )
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18
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19 if pycompat.osname == 'nt':
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20 from . import scmwindows as scmplatform
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21 else:
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22 from . import scmposix as scmplatform
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23
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24 systemrcpath = scmplatform.systemrcpath
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25 userrcpath = scmplatform.userrcpath
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26
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27 def _expandrcpath(path):
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28 '''path could be a file or a directory. return a list of file paths'''
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29 p = util.expandpath(path)
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30 if os.path.isdir(p):
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31 join = os.path.join
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32 return [join(p, f) for f, k in osutil.listdir(p) if f.endswith('.rc')]
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33 return [p]
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34
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35 def envrcitems(env=None):
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36 '''Return [(section, name, value, source)] config items.
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37
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38 The config items are extracted from environment variables specified by env,
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39 used to override systemrc, but not userrc.
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40
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41 If env is not provided, encoding.environ will be used.
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42 '''
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43 if env is None:
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44 env = encoding.environ
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45 checklist = [
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46 ('EDITOR', 'ui', 'editor'),
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47 ('VISUAL', 'ui', 'editor'),
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48 ('PAGER', 'pager', 'pager'),
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49 ]
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50 result = []
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51 for envname, section, configname in checklist:
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52 if envname not in env:
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53 continue
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54 result.append((section, configname, env[envname], '$%s' % envname))
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55 return result
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56
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57 def defaultrcpath():
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58 '''return rc paths in default.d'''
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59 path = []
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60 defaultpath = os.path.join(util.datapath, 'default.d')
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61 if os.path.isdir(defaultpath):
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62 path = _expandrcpath(defaultpath)
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63 return path
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64
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65 def rccomponents():
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66 '''return an ordered [(type, obj)] about where to load configs.
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67
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68 respect $HGRCPATH. if $HGRCPATH is empty, only .hg/hgrc of current repo is
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69 used. if $HGRCPATH is not set, the platform default will be used.
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70
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71 if a directory is provided, *.rc files under it will be used.
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72
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73 type could be either 'path' or 'items', if type is 'path', obj is a string,
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74 and is the config file path. if type is 'items', obj is a list of (section,
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75 name, value, source) that should fill the config directly.
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76 '''
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77 envrc = ('items', envrcitems())
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78
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79 _rccomponents = None
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80 if _rccomponents is None:
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81 if 'HGRCPATH' in encoding.environ:
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82 # assume HGRCPATH is all about user configs so environments can be
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83 # overridden.
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84 _rccomponents = [envrc]
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85 for p in encoding.environ['HGRCPATH'].split(pycompat.ospathsep):
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86 if not p:
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87 continue
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88 _rccomponents.extend(('path', p) for p in _expandrcpath(p))
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89 else:
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90 paths = defaultrcpath() + systemrcpath()
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91 _rccomponents = [('path', os.path.normpath(p)) for p in paths]
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92 _rccomponents.append(envrc)
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93 paths = userrcpath()
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94 _rccomponents.extend(('path', os.path.normpath(p)) for p in paths)
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95 return _rccomponents