# 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.

from __future__ import absolute_import

import os

from . import (

    encoding,

    osutil,

    pycompat,

    util,

)

if pycompat.osname == 'nt':

    from . import scmwindows as scmplatform

else:

    from . import scmposix as scmplatform

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 [join(p, f) for f, k in osutil.listdir(p) if f.endswith('.rc')]

    return [p]

def defaultrcpath():

    '''return rc paths in default.d'''

    path = []

    defaultpath = os.path.join(util.datapath, 'default.d')

    if os.path.isdir(defaultpath):

        path = _expandrcpath(defaultpath)

    return path

_rccomponents = None

def rccomponents():

    global _rccomponents

    if _rccomponents is None:

        if 'HGRCPATH' in encoding.environ:

            _rccomponents = []

            for p in encoding.environ['HGRCPATH'].split(pycompat.ospathsep):

                if not p:

                    continue

        else:

            paths = defaultrcpath() + systemrcpath() + userrcpath()

    return _rccomponents