# rcutil.py - utilities about config paths, special config sections etc.
#
# Copyright Mercurial Contributors
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
import os
from . import (
encoding,
pycompat,
util,
)
from .utils import resourceutil
if pycompat.iswindows:
from . import scmwindows as scmplatform
else:
from . import scmposix as scmplatform
fallbackpager = scmplatform.fallbackpager
systemrcpath = scmplatform.systemrcpath
userrcpath = scmplatform.userrcpath
def _expandrcpath(path):
'''path could be a file or a directory. return a list of file paths'''
p = util.expandpath(path)
if os.path.isdir(p):
join = os.path.join
return sorted(
join(p, f) for f, k in util.listdir(p) if f.endswith(b'.rc')
)
return [p]
def envrcitems(env=None):
"""Return [(section, name, value, source)] config items.
The config items are extracted from environment variables specified by env,
used to override systemrc, but not userrc.
If env is not provided, encoding.environ will be used.
"""
if env is None:
env = encoding.environ
checklist = [
(b'EDITOR', b'ui', b'editor'),
(b'VISUAL', b'ui', b'editor'),
(b'PAGER', b'pager', b'pager'),
]
result = []
for envname, section, configname in checklist:
if envname not in env:
continue
result.append((section, configname, env[envname], b'$%s' % envname))
return result
def default_rc_resources():
"""return rc resource IDs in defaultrc"""
rsrcs = resourceutil.contents(b'mercurial.defaultrc')
return [
(b'mercurial.defaultrc', r)
for r in sorted(rsrcs)
if resourceutil.is_resource(b'mercurial.defaultrc', r)
and r.endswith(b'.rc')
]
def rccomponents():
"""return an ordered [(type, obj)] about where to load configs.
respect $HGRCPATH. if $HGRCPATH is empty, only .hg/hgrc of current repo is
used. if $HGRCPATH is not set, the platform default will be used.
if a directory is provided, *.rc files under it will be used.
type could be either 'path', 'items' or 'resource'. If type is 'path',
obj is a string, and is the config file path. if type is 'items', obj is a
list of (section, name, value, source) that should fill the config directly.
If type is 'resource', obj is a tuple of (package name, resource name).
"""
envrc = (b'items', envrcitems())
if b'HGRCPATH' in encoding.environ:
# assume HGRCPATH is all about user configs so environments can be
# overridden.
_rccomponents = [envrc]
for p in encoding.environ[b'HGRCPATH'].split(pycompat.ospathsep):
if not p:
continue
_rccomponents.extend((b'path', p) for p in _expandrcpath(p))
else:
_rccomponents = [(b'resource', r) for r in default_rc_resources()]
normpaths = lambda paths: [
(b'path', os.path.normpath(p)) for p in paths
]
_rccomponents.extend(normpaths(systemrcpath()))
_rccomponents.append(envrc)
_rccomponents.extend(normpaths(userrcpath()))
return _rccomponents
def defaultpagerenv():
"""return a dict of default environment variables and their values,
intended to be set before starting a pager.
"""
return {b'LESS': b'FRX', b'LV': b'-c'}
def use_repo_hgrc():
"""True if repositories `.hg/hgrc` config should be read"""
return b'HGRCSKIPREPO' not in encoding.environ