# 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, util


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("%s.%s=%s # %s" % (section, name, value, util.pconvert(source)))
    print("")


# environment variable overrides
printconfigs({})
printconfigs({"EDITOR": "e2", "PAGER": "p2"})