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Git did this already [1] [2]. We want this behavior too [3]. This provides a better default user experience (like, supporting colors) if users have things like "PAGER=less" set, which is not uncommon. The environment variables are provided by a method so extensions can override them on demand. [1]:6a5ff7acb5/pager.c (L87)[2]:6a5ff7acb5/Makefile (L1545)[3]: https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-March/094780.html
99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
# rcutil.py - utilities about config paths, special config sections etc.
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#
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# Copyright Mercurial Contributors
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import os
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from . import (
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encoding,
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osutil,
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pycompat,
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util,
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)
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if pycompat.osname == 'nt':
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from . import scmwindows as scmplatform
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else:
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from . import scmposix as scmplatform
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systemrcpath = scmplatform.systemrcpath
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userrcpath = scmplatform.userrcpath
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def _expandrcpath(path):
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'''path could be a file or a directory. return a list of file paths'''
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p = util.expandpath(path)
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if os.path.isdir(p):
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join = os.path.join
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return [join(p, f) for f, k in osutil.listdir(p) if f.endswith('.rc')]
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return [p]
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def envrcitems(env=None):
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'''Return [(section, name, value, source)] config items.
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The config items are extracted from environment variables specified by env,
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used to override systemrc, but not userrc.
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If env is not provided, encoding.environ will be used.
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'''
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if env is None:
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env = encoding.environ
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checklist = [
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('EDITOR', 'ui', 'editor'),
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('VISUAL', 'ui', 'editor'),
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('PAGER', 'pager', 'pager'),
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]
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result = []
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for envname, section, configname in checklist:
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if envname not in env:
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continue
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result.append((section, configname, env[envname], '$%s' % envname))
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return result
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def defaultrcpath():
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'''return rc paths in default.d'''
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path = []
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defaultpath = os.path.join(util.datapath, 'default.d')
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if os.path.isdir(defaultpath):
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path = _expandrcpath(defaultpath)
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return path
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def rccomponents():
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'''return an ordered [(type, obj)] about where to load configs.
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respect $HGRCPATH. if $HGRCPATH is empty, only .hg/hgrc of current repo is
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used. if $HGRCPATH is not set, the platform default will be used.
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if a directory is provided, *.rc files under it will be used.
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type could be either 'path' or 'items', if type is 'path', obj is a string,
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and is the config file path. if type is 'items', obj is a list of (section,
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name, value, source) that should fill the config directly.
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'''
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envrc = ('items', envrcitems())
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if 'HGRCPATH' in encoding.environ:
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# assume HGRCPATH is all about user configs so environments can be
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# overridden.
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_rccomponents = [envrc]
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for p in encoding.environ['HGRCPATH'].split(pycompat.ospathsep):
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if not p:
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continue
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_rccomponents.extend(('path', p) for p in _expandrcpath(p))
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else:
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normpaths = lambda paths: [('path', os.path.normpath(p)) for p in paths]
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_rccomponents = normpaths(defaultrcpath() + systemrcpath())
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_rccomponents.append(envrc)
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_rccomponents.extend(normpaths(userrcpath()))
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return _rccomponents
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def defaultpagerenv():
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'''return a dict of default environment variables and their values,
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intended to be set before starting a pager.
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'''
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return {'LESS': 'FRX', 'LV': '-c'}
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