annotate mercurial/rcutil.py @ 40272:a36c5e23c055

rust: iterator bindings to C code In this changeset, still made of Rust code only, we expose the Rust iterator for instantiation and consumption from C code. The idea is that both the index and index_get_parents() will be passed from the C extension, hence avoiding a hard link dependency to parsers.so, so that the crate can still be built and tested independently. On the other hand, parsers.so will use the symbols defined in this changeset.
author Georges Racinet <gracinet@anybox.fr>
date Thu, 27 Sep 2018 16:51:36 +0200
parents 75979c8d4572
children edbcf5b239f9
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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 pycompat,
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15 util,
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16 )
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17
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18 if pycompat.iswindows:
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19 from . import scmwindows as scmplatform
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20 else:
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21 from . import scmposix as scmplatform
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22
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23 fallbackpager = scmplatform.fallbackpager
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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 util.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 if 'HGRCPATH' in encoding.environ:
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80 # assume HGRCPATH is all about user configs so environments can be
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81 # overridden.
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82 _rccomponents = [envrc]
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83 for p in encoding.environ['HGRCPATH'].split(pycompat.ospathsep):
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84 if not p:
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85 continue
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86 _rccomponents.extend(('path', p) for p in _expandrcpath(p))
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87 else:
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88 normpaths = lambda paths: [('path', os.path.normpath(p)) for p in paths]
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89 _rccomponents = normpaths(defaultrcpath() + systemrcpath())
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90 _rccomponents.append(envrc)
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91 _rccomponents.extend(normpaths(userrcpath()))
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92 return _rccomponents
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93
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94 def defaultpagerenv():
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95 '''return a dict of default environment variables and their values,
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96 intended to be set before starting a pager.
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97 '''
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98 return {'LESS': 'FRX', 'LV': '-c'}