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
  9from dataclasses import dataclass
 10import re
 11from typing import Any, Dict, Iterable, List, Tuple
 12
 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: str
 19	value: str
 20
 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 False
 40		return self._entries == other._entries
 41
 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] = value
 51
 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					continue
 58				return False
 59			if value != b:
 
 
 60				return False
 61		return True
 62
 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 diff
 71
 72	def merge_in_entries(self, other: 'Kconfig') -> None:
 73		for name, value in other._entries.items():
 74			self._entries[name] = value
 75
 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			continue
 94
 95		match = config_matcher.match(line)
 96		if match:
 97			kconfig.add_entry(match.group(1), match.group(2))
 98			continue
 99
100		empty_match = is_not_set_matcher.match(line)
101		if empty_match:
102			kconfig.add_entry(empty_match.group(1), 'n')
103			continue
104
105		if line[0] == '#':
106			continue
107		raise KconfigParseError('Failed to parse: ' + line)
108	return kconfig
 
 

 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
 9import collections
10import re
 
11
12CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$'
13CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+|".*")$'
14
15KconfigEntryBase = collections.namedtuple('KconfigEntry', ['name', 'value'])
16
17class KconfigEntry(KconfigEntryBase):
 
18
19	def __str__(self) -> str:
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)
24
25
26class KconfigParseError(Exception):
27	"""Error parsing Kconfig defconfig or .config."""
28
29
30class 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:
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
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
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] == '#':
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())