#!/usr/bin/env python3
#
# __init__.py
"""
Plugin for Coverage.py to selectively ignore branches depending on the Python version.
"""
#
# Copyright © 2020-2021 Dominic Davis-Foster <dominic@davis-foster.co.uk>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
# OR OTHER DEALINGS IN THE SOFTWARE.
#
# stdlib
import functools
import re
from contextlib import suppress
from typing import Set
# 3rd party
import coverage.python
import pyparsing
from coverage.config import DEFAULT_EXCLUDE
from coverage.misc import join_regex
# this package
from coverage_pyver_pragma.grammar import GRAMMAR
__author__: str = "Dominic Davis-Foster"
__copyright__: str = "2020-2021 Dominic Davis-Foster"
__license__: str = "MIT License"
__version__: str = "0.3.2"
__email__: str = "dominic@davis-foster.co.uk"
__all__ = ("DSL_EXCLUDE", "evaluate_exclude")
DSL_EXCLUDE = re.compile(r'.*#\s*(?:pragma|PRAGMA)[:\s]?\s*(?:no|NO)\s*(?:cover|COVER)\s*\((.*)\)')
"""
Compiled regular expression to match comments in the ``# pragma: no cover (XXX)``,
where ``XXX`` is an expression to be evaluated to determine whether the line
should be excluded from coverage.
.. versionadded:: 0.2.4
"""
[docs]@functools.lru_cache()
def evaluate_exclude(expression: str) -> bool:
"""
Evaluate the given expression to determine whether the line should be excluded from coverage.
.. versionadded:: 0.2.4
:param expression:
"""
return all(list(GRAMMAR.parseString(expression.lower(), parseAll=True)))
class PythonParser(coverage.python.PythonParser):
@functools.lru_cache()
def lines_matching(self, *regexes) -> Set[int]: # pragma: no cover (py311+) # TODO: why?
combined = join_regex([*regexes, *DEFAULT_EXCLUDE])
regex_c = re.compile(combined)
matches = set()
exclude = DSL_EXCLUDE
for idx, ltext in enumerate(self.lines, start=1):
dsl_m = exclude.match(ltext)
# Check if it matches the DSL regex:
if dsl_m:
exclude_source = dsl_m.group(1)
with suppress(pyparsing.ParseBaseException):
if evaluate_exclude(exclude_source):
matches.add(idx)
continue
if regex_c.search(ltext):
matches.add(idx)
return matches
def coverage_init(*args, **kwargs) -> None:
coverage.python.PythonParser.lines_matching = PythonParser.lines_matching # type: ignore[assignment]