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108 lines
2.9 KiB
108 lines
2.9 KiB
# 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 <[email protected]> |
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# Author: Brendan Higgins <[email protected]> |
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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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