/usr/lib/python2.7/dist-packages/pylama/core.py is in python-pylama 7.3.3-1.1.
This file is owned by root:root, with mode 0o644.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 | """Pylama's core functionality.
Prepare params, check a modeline and run the checkers.
"""
import logging
import os.path as op
from .config import process_value, LOGGER, MODELINE_RE, SKIP_PATTERN, CURDIR
from .errors import Error, remove_duplicates
from .lint.extensions import LINTERS
def run(path='', code=None, rootdir=CURDIR, options=None):
"""Run code checkers with given params.
:param path: (str) A file's path.
:param code: (str) A code source
:return errors: list of dictionaries with error's information
"""
errors = []
fileconfig = dict()
linters = LINTERS
linters_params = dict()
lname = 'undefined'
params = dict()
path = op.relpath(path, rootdir)
if options:
linters = options.linters
linters_params = options.linters_params
for mask in options.file_params:
if mask.match(path):
fileconfig.update(options.file_params[mask])
if options.skip and any(p.match(path) for p in options.skip):
LOGGER.info('Skip checking for path: %s', path)
return []
try:
with CodeContext(code, path) as ctx:
code = ctx.code
params = prepare_params(parse_modeline(code), fileconfig, options)
LOGGER.debug('Checking params: %s', params)
if params.get('skip'):
return errors
for item in params.get('linters') or linters:
if not isinstance(item, tuple):
item = (item, LINTERS.get(item))
lname, linter = item
if not linter:
continue
lparams = linters_params.get(lname, dict())
LOGGER.info("Run %s %s", lname, lparams)
linter_errors = linter.run(
path, code=code, ignore=params.get("ignore", set()),
select=params.get("select", set()), params=lparams)
if linter_errors:
for er in linter_errors:
errors.append(Error(filename=path, linter=lname, **er))
except IOError as e:
LOGGER.debug("IOError %s", e)
errors.append(Error(text=str(e), filename=path, linter=lname))
except SyntaxError as e:
LOGGER.debug("SyntaxError %s", e)
errors.append(
Error(linter='pylama', lnum=e.lineno, col=e.offset,
text='E0100 SyntaxError: {}'.format(e.args[0]),
filename=path))
except Exception as e: # noqa
import traceback
LOGGER.info(traceback.format_exc())
errors = filter_errors(errors, **params) # noqa
errors = list(remove_duplicates(errors))
if code and errors:
errors = filter_skiplines(code, errors)
key = lambda e: e.lnum
if options and options.sort:
sort = dict((v, n) for n, v in enumerate(options.sort, 1))
key = lambda e: (sort.get(e.type, 999), e.lnum)
return sorted(errors, key=key)
def parse_modeline(code):
"""Parse params from file's modeline.
:return dict: Linter params.
"""
seek = MODELINE_RE.search(code)
if seek:
return dict(v.split('=') for v in seek.group(1).split(':'))
return dict()
def prepare_params(modeline, fileconfig, options):
"""Prepare and merge a params from modelines and configs.
:return dict:
"""
params = dict(skip=False, ignore=[], select=[], linters=[])
if options:
params['ignore'] = list(options.ignore)
params['select'] = list(options.select)
for config in filter(None, [modeline, fileconfig]):
for key in ('ignore', 'select', 'linters'):
params[key] += process_value(key, config.get(key, []))
params['skip'] = bool(int(config.get('skip', False)))
params['ignore'] = set(params['ignore'])
params['select'] = set(params['select'])
return params
def filter_errors(errors, select=None, ignore=None, **params):
"""Filter a erros by select and ignore options.
:return bool:
"""
select = select or []
ignore = ignore or []
for e in errors:
for s in select:
if e.number.startswith(s):
yield e
break
else:
for s in ignore:
if e.number.startswith(s):
break
else:
yield e
def filter_skiplines(code, errors):
"""Filter lines by `noqa`.
:return list: A filtered errors
"""
if not errors:
return errors
enums = set(er.lnum for er in errors)
removed = set([
num for num, l in enumerate(code.split('\n'), 1)
if num in enums and SKIP_PATTERN(l)
])
if removed:
errors = [er for er in errors if er.lnum not in removed]
return errors
class CodeContext(object):
"""Read file if code is None. """
def __init__(self, code, path):
""" Init context. """
self.code = code
self.path = path
self._file = None
def __enter__(self):
""" Open a file and read it. """
if self.code is None:
LOGGER.info("File is reading: %s", self.path)
self._file = open(self.path, 'rU')
self.code = self._file.read()
return self
def __exit__(self, t, value, traceback):
""" Close the file which was opened. """
if self._file is not None:
self._file.close()
if t and LOGGER.level == logging.DEBUG:
LOGGER.debug(traceback)
# pylama:ignore=R0912,D210,F0001
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