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
165
166
167
|
# fork of https://github.com/asottile/blacken-docs adapted for ruff
from __future__ import annotations
import re
import sys
import argparse
import textwrap
import contextlib
import subprocess
from typing import Match, Optional, Sequence, Generator, NamedTuple, cast
MD_RE = re.compile(
r"(?P<before>^(?P<indent> *)```\s*python\n)" r"(?P<code>.*?)" r"(?P<after>^(?P=indent)```\s*$)",
re.DOTALL | re.MULTILINE,
)
MD_PYCON_RE = re.compile(
r"(?P<before>^(?P<indent> *)```\s*pycon\n)" r"(?P<code>.*?)" r"(?P<after>^(?P=indent)```.*$)",
re.DOTALL | re.MULTILINE,
)
PYCON_PREFIX = ">>> "
PYCON_CONTINUATION_PREFIX = "..."
PYCON_CONTINUATION_RE = re.compile(
rf"^{re.escape(PYCON_CONTINUATION_PREFIX)}( |$)",
)
DEFAULT_LINE_LENGTH = 100
class CodeBlockError(NamedTuple):
offset: int
exc: Exception
def format_str(
src: str,
) -> tuple[str, Sequence[CodeBlockError]]:
errors: list[CodeBlockError] = []
@contextlib.contextmanager
def _collect_error(match: Match[str]) -> Generator[None, None, None]:
try:
yield
except Exception as e:
errors.append(CodeBlockError(match.start(), e))
def _md_match(match: Match[str]) -> str:
code = textwrap.dedent(match["code"])
with _collect_error(match):
code = format_code_block(code)
code = textwrap.indent(code, match["indent"])
return f"{match['before']}{code}{match['after']}"
def _pycon_match(match: Match[str]) -> str:
code = ""
fragment = cast(Optional[str], None)
def finish_fragment() -> None:
nonlocal code
nonlocal fragment
if fragment is not None:
with _collect_error(match):
fragment = format_code_block(fragment)
fragment_lines = fragment.splitlines()
code += f"{PYCON_PREFIX}{fragment_lines[0]}\n"
for line in fragment_lines[1:]:
# Skip blank lines to handle Black adding a blank above
# functions within blocks. A blank line would end the REPL
# continuation prompt.
#
# >>> if True:
# ... def f():
# ... pass
# ...
if line:
code += f"{PYCON_CONTINUATION_PREFIX} {line}\n"
if fragment_lines[-1].startswith(" "):
code += f"{PYCON_CONTINUATION_PREFIX}\n"
fragment = None
indentation = None
for line in match["code"].splitlines():
orig_line, line = line, line.lstrip()
if indentation is None and line:
indentation = len(orig_line) - len(line)
continuation_match = PYCON_CONTINUATION_RE.match(line)
if continuation_match and fragment is not None:
fragment += line[continuation_match.end() :] + "\n"
else:
finish_fragment()
if line.startswith(PYCON_PREFIX):
fragment = line[len(PYCON_PREFIX) :] + "\n"
else:
code += orig_line[indentation:] + "\n"
finish_fragment()
return code
def _md_pycon_match(match: Match[str]) -> str:
code = _pycon_match(match)
code = textwrap.indent(code, match["indent"])
return f"{match['before']}{code}{match['after']}"
src = MD_RE.sub(_md_match, src)
src = MD_PYCON_RE.sub(_md_pycon_match, src)
return src, errors
def format_code_block(code: str) -> str:
return subprocess.check_output(
[
sys.executable,
"-m",
"ruff",
"format",
"--stdin-filename=script.py",
f"--line-length={DEFAULT_LINE_LENGTH}",
],
encoding="utf-8",
input=code,
)
def format_file(
filename: str,
skip_errors: bool,
) -> int:
with open(filename, encoding="UTF-8") as f:
contents = f.read()
new_contents, errors = format_str(contents)
for error in errors:
lineno = contents[: error.offset].count("\n") + 1
print(f"{filename}:{lineno}: code block parse error {error.exc}")
if errors and not skip_errors:
return 1
if contents != new_contents:
print(f"{filename}: Rewriting...")
with open(filename, "w", encoding="UTF-8") as f:
f.write(new_contents)
return 0
else:
return 0
def main(argv: Sequence[str] | None = None) -> int:
parser = argparse.ArgumentParser()
parser.add_argument(
"-l",
"--line-length",
type=int,
default=DEFAULT_LINE_LENGTH,
)
parser.add_argument(
"-S",
"--skip-string-normalization",
action="store_true",
)
parser.add_argument("-E", "--skip-errors", action="store_true")
parser.add_argument("filenames", nargs="*")
args = parser.parse_args(argv)
retv = 0
for filename in args.filenames:
retv |= format_file(filename, skip_errors=args.skip_errors)
return retv
if __name__ == "__main__":
raise SystemExit(main())
|
