133 lines
4.3 KiB
Python
Executable File
133 lines
4.3 KiB
Python
Executable File
#!/usr/bin/env python
|
|
# Generate a Markdown table of all lints, and put it in README.md.
|
|
# With -n option, only print the new table to stdout.
|
|
# With -c option, print a warning and set exit status to 1 if a file would be changed.
|
|
|
|
import os
|
|
import re
|
|
import sys
|
|
|
|
declare_lint_re = re.compile(r'''
|
|
declare_lint! \s* [{(] \s*
|
|
pub \s+ (?P<name>[A-Z_]+) \s*,\s*
|
|
(?P<level>Forbid|Deny|Warn|Allow) \s*,\s*
|
|
" (?P<desc>(?:[^"\\]+|\\.)*) " \s* [})]
|
|
''', re.X | re.S)
|
|
|
|
nl_escape_re = re.compile(r'\\\n\s*')
|
|
|
|
|
|
def collect(lints, fn):
|
|
"""Collect all lints from a file.
|
|
|
|
Adds entries to the lints list as `(module, name, level, desc)`.
|
|
"""
|
|
with open(fn) as fp:
|
|
code = fp.read()
|
|
for match in declare_lint_re.finditer(code):
|
|
# remove \-newline escapes from description string
|
|
desc = nl_escape_re.sub('', match.group('desc'))
|
|
lints.append((os.path.splitext(os.path.basename(fn))[0],
|
|
match.group('name').lower(),
|
|
match.group('level').lower(),
|
|
desc.replace('\\"', '"')))
|
|
|
|
|
|
def gen_table(lints):
|
|
"""Write lint table in Markdown format."""
|
|
# first and third column widths
|
|
w_name = max(len(l[1]) for l in lints)
|
|
w_desc = max(len(l[3]) for l in lints)
|
|
# header and underline
|
|
yield '%-*s | default | meaning\n' % (w_name, 'name')
|
|
yield '%s-|-%s-|-%s\n' % ('-' * w_name, '-' * 7, '-' * w_desc)
|
|
# one table row per lint
|
|
for (_, name, default, meaning) in sorted(lints, key=lambda l: l[1]):
|
|
yield '%-*s | %-7s | %s\n' % (w_name, name, default, meaning)
|
|
|
|
|
|
def gen_group(lints):
|
|
"""Write lint group (list of all lints in the form module::NAME)."""
|
|
for (module, name, _, _) in sorted(lints):
|
|
yield ' %s::%s,\n' % (module, name.upper())
|
|
|
|
|
|
def replace_region(fn, region_start, region_end, callback,
|
|
replace_start=True, write_back=True):
|
|
"""Replace a region in a file delimited by two lines matching regexes.
|
|
|
|
A callback is called to write the new region. If `replace_start` is true,
|
|
the start delimiter line is replaced as well. The end delimiter line is
|
|
never replaced.
|
|
"""
|
|
# read current content
|
|
with open(fn) as fp:
|
|
lines = list(fp)
|
|
|
|
# replace old region with new region
|
|
new_lines = []
|
|
in_old_region = False
|
|
for line in lines:
|
|
if in_old_region:
|
|
if re.search(region_end, line):
|
|
in_old_region = False
|
|
new_lines.extend(callback())
|
|
new_lines.append(line)
|
|
elif re.search(region_start, line):
|
|
if not replace_start:
|
|
new_lines.append(line)
|
|
# old region starts here
|
|
in_old_region = True
|
|
else:
|
|
new_lines.append(line)
|
|
|
|
# write back to file
|
|
if write_back:
|
|
with open(fn, 'w') as fp:
|
|
fp.writelines(new_lines)
|
|
|
|
# if something changed, return true
|
|
return lines != new_lines
|
|
|
|
|
|
def main(print_only=False, check=False):
|
|
lints = []
|
|
|
|
# check directory
|
|
if not os.path.isfile('src/lib.rs'):
|
|
print('Error: call this script from clippy checkout directory!')
|
|
return
|
|
|
|
# collect all lints from source files
|
|
for root, dirs, files in os.walk('src'):
|
|
for fn in files:
|
|
if fn.endswith('.rs'):
|
|
collect(lints, os.path.join(root, fn))
|
|
|
|
if print_only:
|
|
sys.stdout.writelines(gen_table(lints))
|
|
return
|
|
|
|
# replace table in README.md
|
|
changed = replace_region('README.md', r'^name +\|', '^$',
|
|
lambda: gen_table(lints),
|
|
write_back=not check)
|
|
|
|
changed |= replace_region('README.md',
|
|
r'^There are \d+ lints included in this crate:', "",
|
|
lambda: ['There are %d lints included in this crate:\n' % len(lints)],
|
|
write_back=not check)
|
|
|
|
# same for "clippy" lint collection
|
|
changed |= replace_region('src/lib.rs', r'reg.register_lint_group\("clippy"', r'\]\);',
|
|
lambda: gen_group(lints), replace_start=False,
|
|
write_back=not check)
|
|
|
|
if check and changed:
|
|
print('Please run util/update_lints.py to regenerate lints lists.')
|
|
return 1
|
|
|
|
|
|
if __name__ == '__main__':
|
|
sys.exit(main(print_only='-n' in sys.argv, check='-c' in sys.argv))
|