# SPDX-License-Identifier: GPL-2.0
#
# Builds a .config from a kunitconfig.
#
# Copyright (C) 2019, Google LLC.
# Author: Felix Guo <[email protected]>
# Author: Brendan Higgins <[email protected]>
from dataclasses import dataclass
import re
from typing import Any, Dict, Iterable, List, Tuple
CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$'
CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+|".*")$'
@dataclass(frozen=True)
class KconfigEntry:
name: str
value: str
def __str__(self) -> str:
if self.value == 'n':
return f'# CONFIG_{self.name} is not set'
return f'CONFIG_{self.name}={self.value}'
class KconfigParseError(Exception):
"""Error parsing Kconfig defconfig or .config."""
class Kconfig:
"""Represents defconfig or .config specified using the Kconfig language."""
def __init__(self) -> None:
self._entries = {} # type: Dict[str, str]
def __eq__(self, other: Any) -> bool:
if not isinstance(other, self.__class__):
return False
return self._entries == other._entries
def __repr__(self) -> str:
return ','.join(str(e) for e in self.as_entries())
def as_entries(self) -> Iterable[KconfigEntry]:
for name, value in self._entries.items():
yield KconfigEntry(name, value)
def add_entry(self, name: str, value: str) -> None:
self._entries[name] = value
def is_subset_of(self, other: 'Kconfig') -> bool:
for name, value in self._entries.items():
b = other._entries.get(name)
if b is None:
if value == 'n':
continue
return False
if value != b:
return False
return True
def conflicting_options(self, other: 'Kconfig') -> List[Tuple[KconfigEntry, KconfigEntry]]:
diff = [] # type: List[Tuple[KconfigEntry, KconfigEntry]]
for name, value in self._entries.items():
b = other._entries.get(name)
if b and value != b:
pair = (KconfigEntry(name, value), KconfigEntry(name, b))
diff.append(pair)
return diff
def merge_in_entries(self, other: 'Kconfig') -> None:
for name, value in other._entries.items():
self._entries[name] = value
def write_to_file(self, path: str) -> None:
with open(path, 'a+') as f:
for e in self.as_entries():
f.write(str(e) + '\n')
def parse_file(path: str) -> Kconfig:
with open(path, 'r') as f:
return parse_from_string(f.read())
def parse_from_string(blob: str) -> Kconfig:
"""Parses a string containing Kconfig entries."""
kconfig = Kconfig()
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
match = config_matcher.match(line)
if match:
kconfig.add_entry(match.group(1), match.group(2))
continue
empty_match = is_not_set_matcher.match(line)
if empty_match:
kconfig.add_entry(empty_match.group(1), 'n')
continue
if line[0] == '#':
continue
raise KconfigParseError('Failed to parse: ' + line)
return kconfig
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