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