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 | |
| 11 | ||
| 97752c39 | 12 | CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$' |
| 3f37d14b | 13 | CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+|".*")$' |
| 6ebf5866 | 14 | |
| 97752c39 | 15 | KconfigEntryBase = collections.namedtuple('KconfigEntry', ['name', 'value']) |
| 6ebf5866 FG |
16 | |
| 17 | class KconfigEntry(KconfigEntryBase): | |
| 18 | ||
| 19 | def __str__(self) -> str: | |
| 97752c39 DG |
20 | if self.value == 'n': |
| 21 | return r'# CONFIG_%s is not set' % (self.name) | |
| 22 | else: | |
| 23 | return r'CONFIG_%s=%s' % (self.name, self.value) | |
| 6ebf5866 FG |
24 | |
| 25 | ||
| 26 | class KconfigParseError(Exception): | |
| 27 | """Error parsing Kconfig defconfig or .config.""" | |
| 28 | ||
| 29 | ||
| 30 | class Kconfig(object): | |
| 31 | """Represents defconfig or .config specified using the Kconfig language.""" | |
| 32 | ||
| 33 | def __init__(self): | |
| 34 | self._entries = [] | |
| 35 | ||
| 36 | def entries(self): | |
| 37 | return set(self._entries) | |
| 38 | ||
| 39 | def add_entry(self, entry: KconfigEntry) -> None: | |
| 40 | self._entries.append(entry) | |
| 41 | ||
| 42 | def is_subset_of(self, other: 'Kconfig') -> bool: | |
| 97752c39 DG |
43 | for a in self.entries(): |
| 44 | found = False | |
| 45 | for b in other.entries(): | |
| 46 | if a.name != b.name: | |
| 47 | continue | |
| 48 | if a.value != b.value: | |
| 49 | return False | |
| 50 | found = True | |
| 51 | if a.value != 'n' and found == False: | |
| 52 | return False | |
| 53 | return True | |
| 6ebf5866 FG |
54 | |
| 55 | def write_to_file(self, path: str) -> None: | |
| 56 | with open(path, 'w') as f: | |
| 57 | for entry in self.entries(): | |
| 58 | f.write(str(entry) + '\n') | |
| 59 | ||
| 60 | def parse_from_string(self, blob: str) -> None: | |
| 61 | """Parses a string containing KconfigEntrys and populates this Kconfig.""" | |
| 62 | self._entries = [] | |
| 63 | is_not_set_matcher = re.compile(CONFIG_IS_NOT_SET_PATTERN) | |
| 64 | config_matcher = re.compile(CONFIG_PATTERN) | |
| 65 | for line in blob.split('\n'): | |
| 66 | line = line.strip() | |
| 67 | if not line: | |
| 68 | continue | |
| 97752c39 DG |
69 | |
| 70 | match = config_matcher.match(line) | |
| 71 | if match: | |
| 72 | entry = KconfigEntry(match.group(1), match.group(2)) | |
| 73 | self.add_entry(entry) | |
| 74 | continue | |
| 75 | ||
| 76 | empty_match = is_not_set_matcher.match(line) | |
| 77 | if empty_match: | |
| 78 | entry = KconfigEntry(empty_match.group(1), 'n') | |
| 79 | self.add_entry(entry) | |
| 80 | continue | |
| 81 | ||
| 82 | if line[0] == '#': | |
| 6ebf5866 FG |
83 | continue |
| 84 | else: | |
| 85 | raise KconfigParseError('Failed to parse: ' + line) | |
| 86 | ||
| 87 | def read_from_file(self, path: str) -> None: | |
| 88 | with open(path, 'r') as f: | |
| 89 | self.parse_from_string(f.read()) |