projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 6ebf5866 FG |
1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | # | |
| 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 | ||
| 9 | import collections | |
| 10 | import re | |
| 09641f7c | 11 | from typing import List, Set |
| 6ebf5866 | 12 | |
| 97752c39 | 13 | CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$' |
| 3f37d14b | 14 | CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+|".*")$' |
| 6ebf5866 | 15 | |
| 7421b1a4 | 16 | KconfigEntryBase = collections.namedtuple('KconfigEntryBase', ['name', 'value']) |
| 6ebf5866 FG |
17 | |
| 18 | class KconfigEntry(KconfigEntryBase): | |
| 19 | ||
| 20 | def __str__(self) -> str: | |
| 97752c39 DG |
21 | if self.value == 'n': |
| 22 | return r'# CONFIG_%s is not set' % (self.name) | |
| 23 | else: | |
| 24 | return r'CONFIG_%s=%s' % (self.name, self.value) | |
| 6ebf5866 FG |
25 | |
| 26 | ||
| 27 | class KconfigParseError(Exception): | |
| 28 | """Error parsing Kconfig defconfig or .config.""" | |
| 29 | ||
| 30 | ||
| 31 | class Kconfig(object): | |
| 32 | """Represents defconfig or .config specified using the Kconfig language.""" | |
| 33 | ||
| 09641f7c DL |
34 | def __init__(self) -> None: |
| 35 | self._entries = [] # type: List[KconfigEntry] | |
| 6ebf5866 | 36 | |
| 09641f7c | 37 | def entries(self) -> Set[KconfigEntry]: |
| 6ebf5866 FG |
38 | return set(self._entries) |
| 39 | ||
| 40 | def add_entry(self, entry: KconfigEntry) -> None: | |
| 41 | self._entries.append(entry) | |
| 42 | ||
| 43 | def is_subset_of(self, other: 'Kconfig') -> bool: | |
| d3bae4a0 | 44 | other_dict = {e.name: e.value for e in other.entries()} |
| 97752c39 | 45 | for a in self.entries(): |
| d3bae4a0 DL |
46 | b = other_dict.get(a.name) |
| 47 | if b is None: | |
| 48 | if a.value == 'n': | |
| 97752c39 | 49 | continue |
| d3bae4a0 DL |
50 | return False |
| 51 | elif a.value != b: | |
| 97752c39 DG |
52 | return False |
| 53 | return True | |
| 6ebf5866 | 54 | |
| 87c9c163 BH |
55 | def merge_in_entries(self, other: 'Kconfig') -> None: |
| 56 | if other.is_subset_of(self): | |
| 57 | return | |
| 58 | self._entries = list(self.entries().union(other.entries())) | |
| 59 | ||
| 6ebf5866 | 60 | def write_to_file(self, path: str) -> None: |
| 87c9c163 | 61 | with open(path, 'a+') as f: |
| 6ebf5866 FG |
62 | for entry in self.entries(): |
| 63 | f.write(str(entry) + '\n') | |
| 64 | ||
| 98978490 DL |
65 | def parse_file(path: str) -> Kconfig: |
| 66 | with open(path, 'r') as f: | |
| 67 | return parse_from_string(f.read()) | |
| 68 | ||
| 69 | def parse_from_string(blob: str) -> Kconfig: | |
| 70 | """Parses a string containing Kconfig entries.""" | |
| 71 | kconfig = Kconfig() | |
| 72 | is_not_set_matcher = re.compile(CONFIG_IS_NOT_SET_PATTERN) | |
| 73 | config_matcher = re.compile(CONFIG_PATTERN) | |
| 74 | for line in blob.split('\n'): | |
| 75 | line = line.strip() | |
| 76 | if not line: | |
| 77 | continue | |
| 78 | ||
| 79 | match = config_matcher.match(line) | |
| 80 | if match: | |
| 81 | entry = KconfigEntry(match.group(1), match.group(2)) | |
| 82 | kconfig.add_entry(entry) | |
| 83 | continue | |
| 84 | ||
| 85 | empty_match = is_not_set_matcher.match(line) | |
| 86 | if empty_match: | |
| 87 | entry = KconfigEntry(empty_match.group(1), 'n') | |
| 88 | kconfig.add_entry(entry) | |
| 89 | continue | |
| 90 | ||
| 91 | if line[0] == '#': | |
| 92 | continue | |
| 93 | else: | |
| 94 | raise KconfigParseError('Failed to parse: ' + line) | |
| 95 | return kconfig |