# Test the config layer generated by environment variables

from __future__ import absolute_import, print_function

import os

from mercurial import (

    encoding,

    rcutil,

    ui as uimod,

)

testtmp = encoding.environ['TESTTMP']

# prepare hgrc files

def join(name):

    return os.path.join(testtmp, name)

with open(join('sysrc'), 'w') as f:

    f.write('[ui]\neditor=e0\n[pager]\npager=p0\n')

with open(join('userrc'), 'w') as f:

    f.write('[ui]\neditor=e1')

# replace rcpath functions so they point to the files above

def systemrcpath():

    return [join('sysrc')]

def userrcpath():

    return [join('userrc')]

rcutil.systemrcpath = systemrcpath

rcutil.userrcpath = userrcpath

os.path.isdir = lambda x: False # hack: do not load default.d/*.rc

# utility to print configs

def printconfigs(env):

    encoding.environ = env

    rcutil._rccomponents = None # reset cache

    ui = uimod.ui.load()

    for section, name, value in ui.walkconfig():

        source = ui.configsource(section, name)

    print('')

# environment variable overrides

printconfigs({})

printconfigs({'EDITOR': 'e2', 'PAGER': 'p2'})