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# SPDX-License-Identifier: GPL-2.0
#
# Builds a .config from a kunitconfig.
#
# Copyright (C) 2019, Google LLC.
# Author: Felix Guo <felixguoxiuping@gmail.com>
# Author: Brendan Higgins <brendanhiggins@google.com>
import collections
import re
CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_\w+ is not set$'
CONFIG_PATTERN = r'^CONFIG_\w+=\S+$'
KconfigEntryBase = collections.namedtuple('KconfigEntry', ['raw_entry'])
class KconfigEntry(KconfigEntryBase):
def __str__(self) -> str:
return self.raw_entry
class KconfigParseError(Exception):
"""Error parsing Kconfig defconfig or .config."""
class Kconfig(object):
"""Represents defconfig or .config specified using the Kconfig language."""
def __init__(self):
self._entries = []
def entries(self):
return set(self._entries)
def add_entry(self, entry: KconfigEntry) -> None:
self._entries.append(entry)
def is_subset_of(self, other: 'Kconfig') -> bool:
return self.entries().issubset(other.entries())
def write_to_file(self, path: str) -> None:
with open(path, 'w') as f:
for entry in self.entries():
f.write(str(entry) + '\n')
def parse_from_string(self, blob: str) -> None:
"""Parses a string containing KconfigEntrys and populates this Kconfig."""
self._entries = []
is_not_set_matcher = re.compile(CONFIG_IS_NOT_SET_PATTERN)
config_matcher = re.compile(CONFIG_PATTERN)
for line in blob.split('\n'):
line = line.strip()
if not line:
continue
elif config_matcher.match(line) or is_not_set_matcher.match(line):
self._entries.append(KconfigEntry(line))
elif line[0] == '#':
continue
else:
raise KconfigParseError('Failed to parse: ' + line)
def read_from_file(self, path: str) -> None:
with open(path, 'r') as f:
self.parse_from_string(f.read())
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