def _interpolate(self, section, option, rawval, vars):
# special overloading of SafeConfigParser._interpolate:
# do not attempt to interpolate if the string is (double-)quoted
if is_quoted(rawval):
return rawval
# cannot use 'super' here as ConfigParser is outdated
return ConfigParser._interpolate(self, section, option, rawval, vars)
def _interpolate(self, section, option, rawval, vars):
value = ConfigParser._interpolate(self, section, option, rawval,
vars)
return EnvironmentInterpolation().before_get(
parser=self,
section=section,
option=option,
value=value,
defaults=None,
)
def _interpolate(self, section, option, rawval, vars):
# Python < 3.2
try:
return ConfigParser._interpolate(
self, section, option, rawval, vars)
except Exception:
e = sys.exc_info()[1]
args = list(e.args)
args[0] = f'Error in file {self.filename}: {e}'
e.args = tuple(args)
e.message = args[0]
raise
def diff_ini(first, second, diff=None, existing_only=False):
"""Diff ini files
Generate a parser with any value in the second that is different in the first.
Returns a ConfigParser.
Takes interpolation into account. Does not include values that disappeared."""
from configparser import _Chainmap
first = asParser(first)
second = asParser(second)
# TODO: Look at first both in raw and formatted versions
diff = diff or ConfigParser(interpolation=None)
interpolating = ConfigParser()
for section in second.sections():
if section != 'DEFAULT' and not first.has_section(section):
if not existing_only:
diff.add_section(section)
for option in second.options(section):
value = second.get(section, option)
diff.set(section, option, value)
else:
vars = _Chainmap(second._sections[section],
first._sections[section], second._defaults,
first._defaults)
for option, value2 in second.items(section):
if not first.has_option(section, option):
if not existing_only:
ensureSection(diff, section)
diff.set(section, option, value2)
continue
value1 = first.get(section, option)
if value1 != value2 and '%(' in value1:
# try to interpolate, and see if it would amount to the same.
try:
value1 = interpolating._interpolate(
section, option, value1, vars)
except Exception as e:
pass
if value1 != value2:
ensureSection(diff, section)
diff.set(section, option, value2)
return diff
