109 lines · python
1# SPDX-License-Identifier: GPL-2.02#3# Builds a .config from a kunitconfig.4#5# Copyright (C) 2019, Google LLC.6# Author: Felix Guo <felixguoxiuping@gmail.com>7# Author: Brendan Higgins <brendanhiggins@google.com>8 9from dataclasses import dataclass10import re11from typing import Any, Dict, Iterable, List, Tuple12 13CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$'14CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+|".*")$'15 16@dataclass(frozen=True)17class KconfigEntry:18 name: str19 value: str20 21 def __str__(self) -> str:22 if self.value == 'n':23 return f'# CONFIG_{self.name} is not set'24 return f'CONFIG_{self.name}={self.value}'25 26 27class KconfigParseError(Exception):28 """Error parsing Kconfig defconfig or .config."""29 30 31class Kconfig:32 """Represents defconfig or .config specified using the Kconfig language."""33 34 def __init__(self) -> None:35 self._entries = {} # type: Dict[str, str]36 37 def __eq__(self, other: Any) -> bool:38 if not isinstance(other, self.__class__):39 return False40 return self._entries == other._entries41 42 def __repr__(self) -> str:43 return ','.join(str(e) for e in self.as_entries())44 45 def as_entries(self) -> Iterable[KconfigEntry]:46 for name, value in self._entries.items():47 yield KconfigEntry(name, value)48 49 def add_entry(self, name: str, value: str) -> None:50 self._entries[name] = value51 52 def is_subset_of(self, other: 'Kconfig') -> bool:53 for name, value in self._entries.items():54 b = other._entries.get(name)55 if b is None:56 if value == 'n':57 continue58 return False59 if value != b:60 return False61 return True62 63 def conflicting_options(self, other: 'Kconfig') -> List[Tuple[KconfigEntry, KconfigEntry]]:64 diff = [] # type: List[Tuple[KconfigEntry, KconfigEntry]]65 for name, value in self._entries.items():66 b = other._entries.get(name)67 if b and value != b:68 pair = (KconfigEntry(name, value), KconfigEntry(name, b))69 diff.append(pair)70 return diff71 72 def merge_in_entries(self, other: 'Kconfig') -> None:73 for name, value in other._entries.items():74 self._entries[name] = value75 76 def write_to_file(self, path: str) -> None:77 with open(path, 'a+') as f:78 for e in self.as_entries():79 f.write(str(e) + '\n')80 81def parse_file(path: str) -> Kconfig:82 with open(path, 'r') as f:83 return parse_from_string(f.read())84 85def parse_from_string(blob: str) -> Kconfig:86 """Parses a string containing Kconfig entries."""87 kconfig = Kconfig()88 is_not_set_matcher = re.compile(CONFIG_IS_NOT_SET_PATTERN)89 config_matcher = re.compile(CONFIG_PATTERN)90 for line in blob.split('\n'):91 line = line.strip()92 if not line:93 continue94 95 match = config_matcher.match(line)96 if match:97 kconfig.add_entry(match.group(1), match.group(2))98 continue99 100 empty_match = is_not_set_matcher.match(line)101 if empty_match:102 kconfig.add_entry(empty_match.group(1), 'n')103 continue104 105 if line[0] == '#':106 continue107 raise KconfigParseError('Failed to parse: ' + line)108 return kconfig109