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650 lines
25 KiB
650 lines
25 KiB
#!/usr/bin/env python3
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"""
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Wrapper around pyright type checking to allow for easy ignore of specific error messages.
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Thanks to it the `# type: ignore` does not affect the whole line,
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so other problems at the same line cannot be masked by it.
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Features:
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- ignores specific pyright errors based on substring or regex
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- reports empty `# type: ignore`s (without ignore reason in `[]`)
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- reports unused `# type: ignore`s (for example after pyright is updated)
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- allows for ignoring some errors in the whole file - see `FILE_SPECIFIC_IGNORES` variable
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- allows for error aliases - see `ALIASES` variable
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Usage:
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- there are multiple options how to ignore/silence a pyright error:
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1 - "# type: ignore [<error_substring>]"
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- put it as a comment to the line we want to ignore
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- "# type: ignore [<error1>;;<error2>;;...]" if there are more than one errors on that line
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- also regex patterns are valid substrings
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2 - "# pyright: off" / "# pyright: on"
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- all errors in block of code between these marks will be ignored
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3 - FILE_SPECIFIC_IGNORES
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- ignore specific rules (defined by pyright) or error substrings in the whole file
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4 - ALIASES
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- create an alias for a common error and use is with option 1 - "# type: ignore [<error_alias>]"
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Running the script:
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- see all script argument by calling `python pyright_tool.py --help`
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- only directories with existing `pyrightconfig.json` can be tested - see `--dir` flag
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Simplified program flow (as it happens in PyrightTool.run()):
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- extract and validate pyright config data from pyrightconfig.json
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- collect all the pyright errors by actually running the pyright itself
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- extract type-ignore information for all the files pyright was analyzing
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- loop through all the pyright errors and try to match them against all the type-ignore rules
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- if there are some unmatched errors, report them and exit with nonzero value
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- also report unused ignores and other inconsistencies
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"""
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from __future__ import annotations
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import argparse
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import json
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import os
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import re
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import subprocess
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import sys
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from dataclasses import dataclass
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from pathlib import Path
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from typing import Any, Final, TypedDict, TYPE_CHECKING
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if TYPE_CHECKING:
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LineIgnores = list[LineIgnore]
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FileIgnores = dict[str, LineIgnores]
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FileSpecificIgnores = dict[str, list[FileSpecificIgnore]]
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PyrightOffIgnores = list[PyrightOffIgnore]
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FilePyrightOffIgnores = dict[str, PyrightOffIgnores]
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class RangeDetail(TypedDict):
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line: int
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character: int
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class Range(TypedDict):
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start: RangeDetail
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end: RangeDetail
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class Error(TypedDict):
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file: str
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severity: str
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message: str
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range: Range
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rule: str
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class Summary(TypedDict):
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filesAnalyzed: int
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errorCount: int
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warningCount: int
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informationCount: int
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timeInSec: float
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class PyrightResults(TypedDict):
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version: str
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time: str
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generalDiagnostics: list[Error]
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summary: Summary
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@dataclass
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class IgnoreStatement:
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substring: str
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already_used: bool = False
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@dataclass
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class LineIgnore:
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line_no: int
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ignore_statements: list[IgnoreStatement]
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@dataclass
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class FileSpecificIgnore:
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rule: str = ""
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substring: str = ""
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already_used: bool = False
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def __post_init__(self) -> None:
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if self.rule and self.substring:
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raise ValueError("Only one of rule|substring should be set")
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@dataclass
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class PyrightOffIgnore:
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start_line: int
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end_line: int
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already_used: bool = False
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"--dev", action="store_true", help="Creating the error file and not deleting it"
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)
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parser.add_argument(
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"--test",
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action="store_true",
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help="Reusing existing error file and not deleting it",
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)
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parser.add_argument("--log", action="store_true", help="Log details")
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parser.add_argument(
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"--dir",
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help="Directory which to test, relative to the repository root. When empty, taking the directory of this file.",
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default="",
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)
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args = parser.parse_args()
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if args.dev:
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should_generate_error_file = True
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should_delete_error_file = False
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print("Running in dev mode, creating the file and not deleting it")
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elif args.test:
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should_generate_error_file = False
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should_delete_error_file = False
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print("Running in test mode, will reuse existing error file")
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else:
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should_generate_error_file = True
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should_delete_error_file = True
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SHOULD_GENERATE_ERROR_FILE = should_generate_error_file
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SHOULD_DELETE_ERROR_FILE = should_delete_error_file
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SHOULD_LOG = args.log
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if args.dir:
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# Need to change the os directory to find all the files correctly
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# Repository root + the wanted directory.
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HERE = Path(__file__).resolve().parent.parent / args.dir
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if not HERE.is_dir():
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raise RuntimeError(f"Could not find directory {args.dir} under {HERE}")
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os.chdir(HERE)
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else:
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# Directory of this file
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HERE = Path(__file__).resolve().parent
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# TODO: move into a JSON or other config file
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# Files need to have a relative location to the directory being tested
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# Example (when checking `python` directory):
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# "tools/helloworld.py": [
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# FileSpecificIgnore(rule="reportMissingParameterType"),
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# FileSpecificIgnore(substring="cannot be assigned to parameter"),
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# ],
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FILE_SPECIFIC_IGNORES: FileSpecificIgnores = {}
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# Allowing for more readable ignore of common problems, with an easy-to-understand alias
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ALIASES: dict[str, str] = {
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"awaitable-is-generator": 'Return type of generator function must be "Generator" or "Iterable"',
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"obscured-by-same-name": "is obscured by a declaration of the same name",
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"int-into-enum": 'Expression of type "int.*" cannot be assigned to return type ".*"',
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}
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class PyrightTool:
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ON_PATTERN: Final = "# pyright: on"
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OFF_PATTERN: Final = "# pyright: off"
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IGNORE_PATTERN: Final = "# type: ignore"
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IGNORE_DELIMITER: Final = ";;"
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original_pyright_results: PyrightResults
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all_files_to_check: set[str]
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all_pyright_ignores: FileIgnores
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pyright_off_ignores: FilePyrightOffIgnores
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real_errors: list[Error]
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unused_ignores: list[str]
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inconsistencies: list[str] = []
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def __init__(
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self,
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pyright_config_file: str | Path,
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*,
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file_specific_ignores: FileSpecificIgnores | None = None,
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aliases: dict[str, str] | None = None,
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error_file: str | Path = "temp_error_file.json",
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should_generate_error_file: bool = True,
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should_delete_error_file: bool = True,
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should_log: bool = False,
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) -> None:
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self.pyright_config_file = pyright_config_file
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self.file_specific_ignores = file_specific_ignores or {}
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self.aliases = aliases or {}
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self.error_file = error_file
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self.should_generate_error_file = should_generate_error_file
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self.should_delete_error_file = should_delete_error_file
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self.should_log = should_log
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self.count_of_ignored_errors = 0
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self.check_input_correctness()
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def check_input_correctness(self) -> None:
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"""Verify the input data structures are correct."""
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# Checking for correct file_specific_ignores structure
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for file, ignores in self.file_specific_ignores.items():
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for ignore in ignores:
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if not isinstance(ignore, FileSpecificIgnore):
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raise RuntimeError(
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"All items of file_specific_ignores must be FileSpecificIgnore classes. "
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f"Got {ignore} - type {type(ignore)}"
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)
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# Also putting substrings at the beginning of ignore-lists, so they are matched before rules
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# (Not to leave them potentially unused when error would be matched by a rule instead)
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self.file_specific_ignores[file].sort(
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key=lambda x: x.substring, reverse=True
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)
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# Checking for correct aliases (dict[str, str] type)
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for alias, full_substring in self.aliases.items():
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if not isinstance(alias, str) or not isinstance(full_substring, str):
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raise RuntimeError(
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"All alias keys and values must be strings. "
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f"Got {alias} (type {type(alias)}), {full_substring} (type {type(full_substring)}"
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)
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def run(self) -> None:
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"""Main function, putting together all logic and evaluating result."""
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self.pyright_config_data = self.get_and_validate_pyright_config_data()
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self.original_pyright_results = self.get_original_pyright_results()
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self.all_files_to_check = self.get_all_files_to_check()
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self.all_pyright_ignores = self.get_all_pyright_ignores()
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self.pyright_off_ignores = self.get_pyright_off_ignores()
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self.real_errors = self.get_all_real_errors()
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self.unused_ignores = self.get_unused_ignores()
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self.evaluate_final_result()
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def evaluate_final_result(self) -> None:
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"""Reporting results to the user/CI (printing stuff, deciding exit value)."""
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print(
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f"\nIgnored {self.count_of_ignored_errors} custom-defined errors "
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f"from {len(self.all_pyright_ignores)} files."
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)
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if self.unused_ignores:
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print("\nWARNING: there are unused ignores!")
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for unused_ignore in self.unused_ignores:
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print(unused_ignore)
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if self.inconsistencies:
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print("\nWARNING: there are inconsistencies!")
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for inconsistency in self.inconsistencies:
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print(inconsistency)
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if not self.real_errors:
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print("\nSUCCESS: Everything is fine!")
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if self.unused_ignores or self.inconsistencies:
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print("But we have unused ignores or inconsistencies!")
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sys.exit(2)
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else:
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sys.exit(0)
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else:
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print("\nERROR: We have issues!\n")
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for error in self.real_errors:
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print(self.get_human_readable_error_string(error))
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print(f"Found {len(self.real_errors)} issues above")
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if self.unused_ignores or self.inconsistencies:
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print("And we have unused ignores or inconsistencies!")
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sys.exit(1)
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def get_and_validate_pyright_config_data(self) -> dict[str, Any]:
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"""Verify that pyrightconfig exists and has correct data."""
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if not os.path.isfile(self.pyright_config_file):
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raise RuntimeError(
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f"Pyright config file under {self.pyright_config_file} does not exist! "
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"Tool relies on its existence, please create it."
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)
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try:
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config_data = json.loads(open(self.pyright_config_file, "r").read())
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except json.decoder.JSONDecodeError as err:
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raise RuntimeError(
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f"Pyright config under {self.pyright_config_file} does not contain valid JSON! Err: {err}"
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) from None
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# enableTypeIgnoreComments MUST be set to False, otherwise the "type: ignore"s
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# will affect the original pyright result - and we need it to grab all the errors
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# so we can handle them on our own
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if (
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"enableTypeIgnoreComments" not in config_data
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or config_data["enableTypeIgnoreComments"]
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):
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raise RuntimeError(
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f"Please set '\"enableTypeIgnoreComments\": true' in {self.pyright_config_file}. "
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"Otherwise the tool will not work as expected."
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)
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return config_data
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def get_original_pyright_results(self) -> PyrightResults:
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"""Extract all information from pyright.
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`pyright --outputjson` will return all the results in
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nice JSON format with `generalDiagnostics` array storing
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all the errors - schema described in PyrightResults
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"""
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if self.should_generate_error_file:
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cmd = f"pyright -p {self.pyright_config_file} --outputjson > {self.error_file}"
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exit_code = subprocess.call(cmd, shell=True)
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# Checking if there was no non-type-checking error when running the above command
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# Exit code 0 = all fine, no type-checking issues in pyright
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# Exit code 1 = pyright has found some type-checking issues (expected)
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# All other exit codes mean something non-type-related got wrong (or pyright was not found)
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# https://github.com/microsoft/pyright/blob/main/docs/command-line.md#pyright-exit-codes
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if exit_code not in (0, 1):
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raise RuntimeError(
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f"Running '{cmd}' produced a non-expected exit code (see output above)."
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)
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if not os.path.isfile(self.error_file):
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raise RuntimeError(
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f"Pyright error file under {self.error_file} was not generated by running '{cmd}'."
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)
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try:
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pyright_results: PyrightResults = json.loads(
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open(self.error_file, "r").read()
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)
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except FileNotFoundError:
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raise RuntimeError(
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f"Error file under {self.error_file} does not exist!"
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) from None
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except json.decoder.JSONDecodeError as err:
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raise RuntimeError(
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f"Error file under {self.error_file} does not contain valid JSON! Err: {err}"
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) from None
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if self.should_delete_error_file:
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os.remove(self.error_file)
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return pyright_results
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def get_all_real_errors(self) -> list[Error]:
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"""Analyze all pyright errors and discard all that should be ignored.
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Ignores can be different:
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- as per "# type: ignore [<error_substring>]" comment
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- as per "file_specific_ignores"
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- as per "# pyright: off" mark
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"""
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real_errors: list[Error] = []
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for error in self.original_pyright_results["generalDiagnostics"]:
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# Special handling of cycle import issues, which have different format
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if "range" not in error:
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error["range"] = {"start": {"line": 0}}
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error["rule"] = "cycleImport"
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real_errors.append(error)
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continue
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file_path = error["file"]
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error_message = error["message"]
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line_no = error["range"]["start"]["line"]
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# Checking for "# type: ignore [<error_substring>]" comment
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if self.should_ignore_per_inline_substring(
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file_path, error_message, line_no
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):
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self.count_of_ignored_errors += 1
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self.log_ignore(error, "error substring matched")
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continue
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# Checking in file_specific_ignores
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if self.should_ignore_file_specific_error(file_path, error):
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self.count_of_ignored_errors += 1
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self.log_ignore(error, "file specific error")
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continue
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# Checking for "# pyright: off" mark
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if self.is_line_in_pyright_off_block(file_path, line_no):
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self.count_of_ignored_errors += 1
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self.log_ignore(error, "pyright disabled for this line")
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continue
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real_errors.append(error)
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return real_errors
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def get_all_files_to_check(self) -> set[str]:
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"""Get all files to be analyzed by pyright, based on its config."""
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all_files: set[str] = set()
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if "include" in self.pyright_config_data:
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for dir_or_file in self.pyright_config_data["include"]:
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for file in self.get_all_py_files_recursively(dir_or_file):
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all_files.add(file)
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else:
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# "include" is missing, we should analyze all files in current dir
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for file in self.get_all_py_files_recursively("."):
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all_files.add(file)
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if "exclude" in self.pyright_config_data:
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for dir_or_file in self.pyright_config_data["exclude"]:
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for file in self.get_all_py_files_recursively(dir_or_file):
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if file in all_files:
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all_files.remove(file)
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return all_files
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@staticmethod
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def get_all_py_files_recursively(dir_or_file: str) -> set[str]:
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"""Return all python files in certain directory (or the file itself)."""
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if os.path.isfile(dir_or_file):
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return set(str(HERE / dir_or_file))
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all_files: set[str] = set()
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for root, _, files in os.walk(dir_or_file):
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for file in files:
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if file.endswith(".py"):
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all_files.add(str(HERE / os.path.join(root, file)))
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return all_files
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def get_all_pyright_ignores(self) -> FileIgnores:
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"""Get ignore information from all the files to be analyzed."""
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file_ignores: FileIgnores = {}
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for file in self.all_files_to_check:
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ignores = self.get_inline_type_ignores_from_file(file)
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if ignores:
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file_ignores[file] = ignores
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return file_ignores
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def get_pyright_off_ignores(self) -> FilePyrightOffIgnores:
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"""Get ignore information based on `# pyright: on/off` marks."""
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pyright_off_ignores: FilePyrightOffIgnores = {}
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for file in self.all_files_to_check:
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ignores = self.find_pyright_off_from_file(file)
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if ignores:
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pyright_off_ignores[file] = ignores
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return pyright_off_ignores
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def get_unused_ignores(self) -> list[str]:
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"""Evaluate if there are no ignores not matched by pyright errors."""
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unused_ignores: list[str] = []
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# type: ignore
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for file, file_ignores in self.all_pyright_ignores.items():
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for line_ignore in file_ignores:
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for ignore_statement in line_ignore.ignore_statements:
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if not ignore_statement.already_used:
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unused_ignores.append(
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f"File {file}:{line_ignore.line_no + 1} has unused ignore. "
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f"Substring: {ignore_statement.substring}"
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)
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# Pyright: off
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for file, file_ignores in self.pyright_off_ignores.items():
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for off_ignore in file_ignores:
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if not off_ignore.already_used:
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unused_ignores.append(
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f"File {file} has unused # pyright: off ignore between lines "
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f"{off_ignore.start_line + 1} and {off_ignore.end_line + 1}."
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)
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# File-specific
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for file, file_ignores in self.file_specific_ignores.items():
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for ignore_object in file_ignores:
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if not ignore_object.already_used:
|
|
if ignore_object.substring:
|
|
unused_ignores.append(
|
|
f"File {file} has unused specific ignore substring. "
|
|
f"Substring: {ignore_object.substring}"
|
|
)
|
|
elif ignore_object.rule:
|
|
unused_ignores.append(
|
|
f"File {file} has unused specific ignore rule. "
|
|
f"Rule: {ignore_object.rule}"
|
|
)
|
|
|
|
return unused_ignores
|
|
|
|
def should_ignore_per_inline_substring(
|
|
self, file: str, error_message: str, line_no: int
|
|
) -> bool:
|
|
"""Check if line should be ignored based on inline substring/regex."""
|
|
if file not in self.all_pyright_ignores:
|
|
return False
|
|
|
|
for ignore_index, ignore in enumerate(self.all_pyright_ignores[file]):
|
|
if line_no == ignore.line_no:
|
|
for substring_index, ignore_statement in enumerate(
|
|
ignore.ignore_statements
|
|
):
|
|
# Supporting both text substrings and regex patterns
|
|
if ignore_statement.substring in error_message or re.search(
|
|
ignore_statement.substring, error_message
|
|
):
|
|
# Marking this ignore to be used (so we can identify unused ignores)
|
|
self.all_pyright_ignores[file][ignore_index].ignore_statements[
|
|
substring_index
|
|
].already_used = True
|
|
return True
|
|
|
|
return False
|
|
|
|
def should_ignore_file_specific_error(self, file: str, error: Error) -> bool:
|
|
"""Check if line should be ignored based on file-specific ignores."""
|
|
if file not in self.file_specific_ignores:
|
|
return False
|
|
|
|
for ignore_object in self.file_specific_ignores[file]:
|
|
if ignore_object.rule:
|
|
if error["rule"] == ignore_object.rule:
|
|
ignore_object.already_used = True
|
|
return True
|
|
elif ignore_object.substring:
|
|
# Supporting both text substrings and regex patterns
|
|
if ignore_object.substring in error["message"] or re.search(
|
|
ignore_object.substring, error["message"]
|
|
):
|
|
ignore_object.already_used = True
|
|
return True
|
|
|
|
return False
|
|
|
|
def is_line_in_pyright_off_block(self, file: str, line_no: int) -> bool:
|
|
"""Check if line should be ignored based on `# pyright: off` mark."""
|
|
if file not in self.pyright_off_ignores:
|
|
return False
|
|
|
|
for off_ignore in self.pyright_off_ignores[file]:
|
|
if off_ignore.start_line < line_no < off_ignore.end_line:
|
|
off_ignore.already_used = True
|
|
return True
|
|
|
|
return False
|
|
|
|
def find_pyright_off_from_file(self, file: str) -> PyrightOffIgnores:
|
|
"""Get sections in file to be ignored based on `# pyright: off`."""
|
|
pyright_off_ignores: PyrightOffIgnores = []
|
|
with open(file, "r") as f:
|
|
pyright_off = False
|
|
start_line = 0
|
|
index = 0
|
|
for index, line in enumerate(f):
|
|
if self.OFF_PATTERN in line and not pyright_off:
|
|
start_line = index
|
|
pyright_off = True
|
|
elif self.ON_PATTERN in line and pyright_off:
|
|
pyright_off_ignores.append(PyrightOffIgnore(start_line, index))
|
|
pyright_off = False
|
|
|
|
if pyright_off:
|
|
pyright_off_ignores.append(PyrightOffIgnore(start_line, index))
|
|
|
|
return pyright_off_ignores
|
|
|
|
def get_inline_type_ignores_from_file(self, file: str) -> LineIgnores:
|
|
"""Get all type ignore lines and statements from a certain file."""
|
|
ignores: LineIgnores = []
|
|
with open(file, "r") as f:
|
|
for index, line in enumerate(f):
|
|
if self.IGNORE_PATTERN in line:
|
|
ignore_statements = self.get_ignore_statements(line)
|
|
if not ignore_statements:
|
|
self.inconsistencies.append(
|
|
f"There is an empty `{self.IGNORE_PATTERN}` in {file}:{index+1}"
|
|
)
|
|
else:
|
|
ignores.append(LineIgnore(index, ignore_statements))
|
|
|
|
return ignores
|
|
|
|
def get_ignore_statements(self, line: str) -> list[IgnoreStatement]:
|
|
"""Extract error substrings to be ignored from a certain line."""
|
|
# Extracting content of [error_substring(s)] after the ignore comment
|
|
ignore_part = line.split(self.IGNORE_PATTERN, maxsplit=2)[1]
|
|
ignore_content = re.search(r"\[(.*)\]", ignore_part)
|
|
|
|
# We should not be using empty `# type: ignore` without content in []
|
|
# Notifying the parent function that we should do something about it
|
|
if not ignore_content:
|
|
return []
|
|
|
|
# There might be more than one substring
|
|
statement_substrings = ignore_content.group(1).split(self.IGNORE_DELIMITER)
|
|
|
|
# When finding aliases, replacing them with a real substring
|
|
statement_substrings = [self.aliases.get(ss, ss) for ss in statement_substrings]
|
|
|
|
return [IgnoreStatement(substr) for substr in statement_substrings]
|
|
|
|
def log_ignore(self, error: Error, reason: str) -> None:
|
|
"""Print the action of ignoring certain error into the console."""
|
|
if self.should_log:
|
|
err = self.get_human_readable_error_string(error)
|
|
print(f"\nError ignored. Reason: {reason}.\nErr: {err}")
|
|
|
|
@staticmethod
|
|
def get_human_readable_error_string(error: Error) -> str:
|
|
"""Transform error object to a string readable by human."""
|
|
file = error["file"]
|
|
message = error["message"]
|
|
rule = error.get("rule", "No specific rule")
|
|
line = error["range"]["start"]["line"]
|
|
|
|
# Need to add +1 to the line, as it is zero-based index
|
|
return f"{file}:{line + 1}: - error: {message} ({rule})\n"
|
|
|
|
|
|
if __name__ == "__main__":
|
|
tool = PyrightTool(
|
|
pyright_config_file=HERE / "pyrightconfig.json",
|
|
file_specific_ignores={
|
|
str(HERE / k): v for k, v in FILE_SPECIFIC_IGNORES.items()
|
|
},
|
|
aliases=ALIASES,
|
|
error_file="errors_for_pyright_temp.json",
|
|
should_generate_error_file=SHOULD_GENERATE_ERROR_FILE,
|
|
should_delete_error_file=SHOULD_DELETE_ERROR_FILE,
|
|
should_log=SHOULD_LOG,
|
|
)
|
|
tool.run()
|