summaryrefslogtreecommitdiff
path: root/tools/testing/kunit/kunit_config.py
blob: 75a8dc1683d4295a375f12829e36650ebe1c8d9d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
# SPDX-License-Identifier: GPL-2.0
#
# Builds a .config from a kunitconfig.
#
# Copyright (C) 2019, Google LLC.
# Author: Felix Guo <felixguoxiuping@gmail.com>
# Author: Brendan Higgins <brendanhiggins@google.com>

from dataclasses import dataclass
import re
from typing import List, Set

CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$'
CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+|".*")$'

@dataclass(frozen=True)
class KconfigEntry:
	name: str
	value: str

	def __str__(self) -> str:
		if self.value == 'n':
			return f'# CONFIG_{self.name} is not set'
		return f'CONFIG_{self.name}={self.value}'


class KconfigParseError(Exception):
	"""Error parsing Kconfig defconfig or .config."""


class Kconfig:
	"""Represents defconfig or .config specified using the Kconfig language."""

	def __init__(self) -> None:
		self._entries = []  # type: List[KconfigEntry]

	def entries(self) -> Set[KconfigEntry]:
		return set(self._entries)

	def add_entry(self, entry: KconfigEntry) -> None:
		self._entries.append(entry)

	def is_subset_of(self, other: 'Kconfig') -> bool:
		other_dict = {e.name: e.value for e in other.entries()}
		for a in self.entries():
			b = other_dict.get(a.name)
			if b is None:
				if a.value == 'n':
					continue
				return False
			if a.value != b:
				return False
		return True

	def merge_in_entries(self, other: 'Kconfig') -> None:
		if other.is_subset_of(self):
			return
		self._entries = list(self.entries().union(other.entries()))

	def write_to_file(self, path: str) -> None:
		with open(path, 'a+') as f:
			for entry in self.entries():
				f.write(str(entry) + '\n')

def parse_file(path: str) -> Kconfig:
	with open(path, 'r') as f:
		return parse_from_string(f.read())

def parse_from_string(blob: str) -> Kconfig:
	"""Parses a string containing Kconfig entries."""
	kconfig = Kconfig()
	is_not_set_matcher = re.compile(CONFIG_IS_NOT_SET_PATTERN)
	config_matcher = re.compile(CONFIG_PATTERN)
	for line in blob.split('\n'):
		line = line.strip()
		if not line:
			continue

		match = config_matcher.match(line)
		if match:
			entry = KconfigEntry(match.group(1), match.group(2))
			kconfig.add_entry(entry)
			continue

		empty_match = is_not_set_matcher.match(line)
		if empty_match:
			entry = KconfigEntry(empty_match.group(1), 'n')
			kconfig.add_entry(entry)
			continue

		if line[0] == '#':
			continue
		raise KconfigParseError('Failed to parse: ' + line)
	return kconfig