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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
from __future__ import annotations
import pickle
import sys
import warnings
from pathlib import Path
from pylint.constants import PYLINT_HOME
from pylint.utils import LinterStats
PYLINT_HOME_AS_PATH = Path(PYLINT_HOME)
def _get_pdata_path(
base_name: Path, recurs: int, pylint_home: Path = PYLINT_HOME_AS_PATH
) -> Path:
# We strip all characters that can't be used in a filename. Also strip '/' and
# '\\' because we want to create a single file, not sub-directories.
underscored_name = "_".join(
str(p.replace(":", "_").replace("/", "_").replace("\\", "_"))
for p in base_name.parts
)
return pylint_home / f"{underscored_name}_{recurs}.stats"
def load_results(
base: str | Path, pylint_home: str | Path = PYLINT_HOME
) -> LinterStats | None:
base = Path(base)
pylint_home = Path(pylint_home)
data_file = _get_pdata_path(base, 1, pylint_home)
if not data_file.exists():
return None
try:
with open(data_file, "rb") as stream:
data = pickle.load(stream)
if not isinstance(data, LinterStats):
warnings.warn(
"You're using an old pylint cache with invalid data following "
f"an upgrade, please delete '{data_file}'.",
UserWarning,
)
raise TypeError
return data
except Exception: # pylint: disable=broad-except
# There's an issue with the cache but we just continue as if it isn't there
return None
def save_results(
results: LinterStats, base: str | Path, pylint_home: str | Path = PYLINT_HOME
) -> None:
base = Path(base)
pylint_home = Path(pylint_home)
try:
pylint_home.mkdir(parents=True, exist_ok=True)
except OSError: # pragma: no cover
print(f"Unable to create directory {pylint_home}", file=sys.stderr)
data_file = _get_pdata_path(base, 1)
try:
with open(data_file, "wb") as stream:
pickle.dump(results, stream)
except OSError as ex: # pragma: no cover
print(f"Unable to create file {data_file}: {ex}", file=sys.stderr)
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