config: use the new '_unset' value for 'configbool'
This should let 'configbool' delegate all special processing of the default
config value to the main 'config' method.
The default value for bool (False) is still enforced in this method if no other
default were passed.
# 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'})