File size: 5,223 Bytes
b5e8702 | 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 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | from collections.abc import Mapping
from typing import NamedTuple
from .exceptions import ParseError
COMMENTCHARS = "#;"
class ParsedLine(NamedTuple):
lineno: int
section: str | None
name: str | None
value: str | None
def parse_ini_data(
path: str,
data: str,
*,
strip_inline_comments: bool,
strip_section_whitespace: bool = False,
) -> tuple[Mapping[str, Mapping[str, str]], Mapping[tuple[str, str | None], int]]:
"""Parse INI data and return sections and sources mappings.
Args:
path: Path for error messages
data: INI content as string
strip_inline_comments: Whether to strip inline comments from values
strip_section_whitespace: Whether to strip whitespace from section and key names
(default: False). When True, addresses issue #4 by stripping Unicode whitespace.
Returns:
Tuple of (sections_data, sources) where:
- sections_data: mapping of section -> {name -> value}
- sources: mapping of (section, name) -> line number
"""
tokens = parse_lines(
path,
data.splitlines(True),
strip_inline_comments=strip_inline_comments,
strip_section_whitespace=strip_section_whitespace,
)
sources: dict[tuple[str, str | None], int] = {}
sections_data: dict[str, dict[str, str]] = {}
for lineno, section, name, value in tokens:
if section is None:
raise ParseError(path, lineno, "no section header defined")
sources[section, name] = lineno
if name is None:
if section in sections_data:
raise ParseError(path, lineno, f"duplicate section {section!r}")
sections_data[section] = {}
else:
if name in sections_data[section]:
raise ParseError(path, lineno, f"duplicate name {name!r}")
assert value is not None
sections_data[section][name] = value
return sections_data, sources
def parse_lines(
path: str,
line_iter: list[str],
*,
strip_inline_comments: bool = False,
strip_section_whitespace: bool = False,
) -> list[ParsedLine]:
result: list[ParsedLine] = []
section = None
for lineno, line in enumerate(line_iter):
name, data = _parseline(
path, line, lineno, strip_inline_comments, strip_section_whitespace
)
# new value
if name is not None and data is not None:
result.append(ParsedLine(lineno, section, name, data))
# new section
elif name is not None and data is None:
if not name:
raise ParseError(path, lineno, "empty section name")
section = name
result.append(ParsedLine(lineno, section, None, None))
# continuation
elif name is None and data is not None:
if not result:
raise ParseError(path, lineno, "unexpected value continuation")
last = result.pop()
if last.name is None:
raise ParseError(path, lineno, "unexpected value continuation")
if last.value:
last = last._replace(value=f"{last.value}\n{data}")
else:
last = last._replace(value=data)
result.append(last)
return result
def _parseline(
path: str,
line: str,
lineno: int,
strip_inline_comments: bool,
strip_section_whitespace: bool,
) -> tuple[str | None, str | None]:
# blank lines
if iscommentline(line):
line = ""
else:
line = line.rstrip()
if not line:
return None, None
# section
if line[0] == "[":
realline = line
for c in COMMENTCHARS:
line = line.split(c)[0].rstrip()
if line[-1] == "]":
section_name = line[1:-1]
# Optionally strip whitespace from section name (issue #4)
if strip_section_whitespace:
section_name = section_name.strip()
return section_name, None
return None, realline.strip()
# value
elif not line[0].isspace():
try:
name, value = line.split("=", 1)
if ":" in name:
raise ValueError()
except ValueError:
try:
name, value = line.split(":", 1)
except ValueError:
raise ParseError(path, lineno, f"unexpected line: {line!r}") from None
# Strip key name (always for backward compatibility, optionally with unicode awareness)
key_name = name.strip()
# Strip value
value = value.strip()
# Strip inline comments from values if requested (issue #55)
if strip_inline_comments:
for c in COMMENTCHARS:
value = value.split(c)[0].rstrip()
return key_name, value
# continuation
else:
line = line.strip()
# Strip inline comments from continuations if requested (issue #55)
if strip_inline_comments:
for c in COMMENTCHARS:
line = line.split(c)[0].rstrip()
return None, line
def iscommentline(line: str) -> bool:
c = line.lstrip()[:1]
return c in COMMENTCHARS
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