mirror of
https://github.com/Lucas-V-L/lucasvl.nl.git
synced 2024-10-29 19:38:16 -05:00
661 lines
20 KiB
Python
661 lines
20 KiB
Python
"""Exceptions used throughout package.
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This module MUST NOT try to import from anything within `pip._internal` to
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operate. This is expected to be importable from any/all files within the
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subpackage and, thus, should not depend on them.
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"""
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import configparser
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import re
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from itertools import chain, groupby, repeat
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from typing import TYPE_CHECKING, Dict, List, Optional, Union
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from pip._vendor.requests.models import Request, Response
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from pip._vendor.rich.console import Console, ConsoleOptions, RenderResult
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from pip._vendor.rich.markup import escape
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from pip._vendor.rich.text import Text
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if TYPE_CHECKING:
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from hashlib import _Hash
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from typing import Literal
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from pip._internal.metadata import BaseDistribution
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from pip._internal.req.req_install import InstallRequirement
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#
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# Scaffolding
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#
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def _is_kebab_case(s: str) -> bool:
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return re.match(r"^[a-z]+(-[a-z]+)*$", s) is not None
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def _prefix_with_indent(
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s: Union[Text, str],
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console: Console,
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*,
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prefix: str,
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indent: str,
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) -> Text:
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if isinstance(s, Text):
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text = s
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else:
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text = console.render_str(s)
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return console.render_str(prefix, overflow="ignore") + console.render_str(
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f"\n{indent}", overflow="ignore"
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).join(text.split(allow_blank=True))
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class PipError(Exception):
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"""The base pip error."""
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class DiagnosticPipError(PipError):
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"""An error, that presents diagnostic information to the user.
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This contains a bunch of logic, to enable pretty presentation of our error
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messages. Each error gets a unique reference. Each error can also include
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additional context, a hint and/or a note -- which are presented with the
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main error message in a consistent style.
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This is adapted from the error output styling in `sphinx-theme-builder`.
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"""
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reference: str
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def __init__(
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self,
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*,
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kind: 'Literal["error", "warning"]' = "error",
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reference: Optional[str] = None,
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message: Union[str, Text],
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context: Optional[Union[str, Text]],
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hint_stmt: Optional[Union[str, Text]],
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note_stmt: Optional[Union[str, Text]] = None,
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link: Optional[str] = None,
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) -> None:
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# Ensure a proper reference is provided.
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if reference is None:
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assert hasattr(self, "reference"), "error reference not provided!"
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reference = self.reference
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assert _is_kebab_case(reference), "error reference must be kebab-case!"
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self.kind = kind
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self.reference = reference
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self.message = message
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self.context = context
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self.note_stmt = note_stmt
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self.hint_stmt = hint_stmt
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self.link = link
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super().__init__(f"<{self.__class__.__name__}: {self.reference}>")
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def __repr__(self) -> str:
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return (
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f"<{self.__class__.__name__}("
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f"reference={self.reference!r}, "
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f"message={self.message!r}, "
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f"context={self.context!r}, "
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f"note_stmt={self.note_stmt!r}, "
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f"hint_stmt={self.hint_stmt!r}"
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")>"
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)
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def __rich_console__(
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self,
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console: Console,
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options: ConsoleOptions,
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) -> RenderResult:
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colour = "red" if self.kind == "error" else "yellow"
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yield f"[{colour} bold]{self.kind}[/]: [bold]{self.reference}[/]"
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yield ""
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if not options.ascii_only:
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# Present the main message, with relevant context indented.
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if self.context is not None:
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yield _prefix_with_indent(
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self.message,
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console,
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prefix=f"[{colour}]×[/] ",
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indent=f"[{colour}]│[/] ",
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)
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yield _prefix_with_indent(
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self.context,
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console,
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prefix=f"[{colour}]╰─>[/] ",
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indent=f"[{colour}] [/] ",
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)
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else:
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yield _prefix_with_indent(
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self.message,
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console,
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prefix="[red]×[/] ",
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indent=" ",
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)
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else:
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yield self.message
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if self.context is not None:
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yield ""
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yield self.context
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if self.note_stmt is not None or self.hint_stmt is not None:
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yield ""
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if self.note_stmt is not None:
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yield _prefix_with_indent(
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self.note_stmt,
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console,
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prefix="[magenta bold]note[/]: ",
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indent=" ",
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)
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if self.hint_stmt is not None:
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yield _prefix_with_indent(
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self.hint_stmt,
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console,
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prefix="[cyan bold]hint[/]: ",
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indent=" ",
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)
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if self.link is not None:
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yield ""
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yield f"Link: {self.link}"
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#
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# Actual Errors
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#
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class ConfigurationError(PipError):
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"""General exception in configuration"""
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class InstallationError(PipError):
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"""General exception during installation"""
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class UninstallationError(PipError):
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"""General exception during uninstallation"""
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class MissingPyProjectBuildRequires(DiagnosticPipError):
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"""Raised when pyproject.toml has `build-system`, but no `build-system.requires`."""
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reference = "missing-pyproject-build-system-requires"
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def __init__(self, *, package: str) -> None:
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super().__init__(
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message=f"Can not process {escape(package)}",
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context=Text(
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"This package has an invalid pyproject.toml file.\n"
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"The [build-system] table is missing the mandatory `requires` key."
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),
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note_stmt="This is an issue with the package mentioned above, not pip.",
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hint_stmt=Text("See PEP 518 for the detailed specification."),
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)
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class InvalidPyProjectBuildRequires(DiagnosticPipError):
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"""Raised when pyproject.toml an invalid `build-system.requires`."""
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reference = "invalid-pyproject-build-system-requires"
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def __init__(self, *, package: str, reason: str) -> None:
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super().__init__(
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message=f"Can not process {escape(package)}",
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context=Text(
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"This package has an invalid `build-system.requires` key in "
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f"pyproject.toml.\n{reason}"
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),
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note_stmt="This is an issue with the package mentioned above, not pip.",
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hint_stmt=Text("See PEP 518 for the detailed specification."),
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)
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class NoneMetadataError(PipError):
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"""Raised when accessing a Distribution's "METADATA" or "PKG-INFO".
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This signifies an inconsistency, when the Distribution claims to have
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the metadata file (if not, raise ``FileNotFoundError`` instead), but is
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not actually able to produce its content. This may be due to permission
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errors.
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"""
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def __init__(
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self,
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dist: "BaseDistribution",
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metadata_name: str,
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) -> None:
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"""
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:param dist: A Distribution object.
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:param metadata_name: The name of the metadata being accessed
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(can be "METADATA" or "PKG-INFO").
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"""
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self.dist = dist
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self.metadata_name = metadata_name
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def __str__(self) -> str:
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# Use `dist` in the error message because its stringification
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# includes more information, like the version and location.
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return "None {} metadata found for distribution: {}".format(
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self.metadata_name,
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self.dist,
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)
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class UserInstallationInvalid(InstallationError):
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"""A --user install is requested on an environment without user site."""
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def __str__(self) -> str:
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return "User base directory is not specified"
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class InvalidSchemeCombination(InstallationError):
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def __str__(self) -> str:
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before = ", ".join(str(a) for a in self.args[:-1])
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return f"Cannot set {before} and {self.args[-1]} together"
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class DistributionNotFound(InstallationError):
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"""Raised when a distribution cannot be found to satisfy a requirement"""
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class RequirementsFileParseError(InstallationError):
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"""Raised when a general error occurs parsing a requirements file line."""
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class BestVersionAlreadyInstalled(PipError):
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"""Raised when the most up-to-date version of a package is already
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installed."""
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class BadCommand(PipError):
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"""Raised when virtualenv or a command is not found"""
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class CommandError(PipError):
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"""Raised when there is an error in command-line arguments"""
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class PreviousBuildDirError(PipError):
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"""Raised when there's a previous conflicting build directory"""
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class NetworkConnectionError(PipError):
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"""HTTP connection error"""
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def __init__(
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self,
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error_msg: str,
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response: Optional[Response] = None,
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request: Optional[Request] = None,
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) -> None:
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"""
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Initialize NetworkConnectionError with `request` and `response`
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objects.
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"""
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self.response = response
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self.request = request
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self.error_msg = error_msg
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if (
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self.response is not None
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and not self.request
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and hasattr(response, "request")
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):
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self.request = self.response.request
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super().__init__(error_msg, response, request)
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def __str__(self) -> str:
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return str(self.error_msg)
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class InvalidWheelFilename(InstallationError):
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"""Invalid wheel filename."""
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class UnsupportedWheel(InstallationError):
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"""Unsupported wheel."""
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class InvalidWheel(InstallationError):
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"""Invalid (e.g. corrupt) wheel."""
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def __init__(self, location: str, name: str):
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self.location = location
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self.name = name
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def __str__(self) -> str:
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return f"Wheel '{self.name}' located at {self.location} is invalid."
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class MetadataInconsistent(InstallationError):
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"""Built metadata contains inconsistent information.
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This is raised when the metadata contains values (e.g. name and version)
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that do not match the information previously obtained from sdist filename,
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user-supplied ``#egg=`` value, or an install requirement name.
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"""
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def __init__(
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self, ireq: "InstallRequirement", field: str, f_val: str, m_val: str
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) -> None:
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self.ireq = ireq
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self.field = field
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self.f_val = f_val
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self.m_val = m_val
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def __str__(self) -> str:
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return (
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f"Requested {self.ireq} has inconsistent {self.field}: "
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f"expected {self.f_val!r}, but metadata has {self.m_val!r}"
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)
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class LegacyInstallFailure(DiagnosticPipError):
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"""Error occurred while executing `setup.py install`"""
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reference = "legacy-install-failure"
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def __init__(self, package_details: str) -> None:
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super().__init__(
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message="Encountered error while trying to install package.",
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context=package_details,
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hint_stmt="See above for output from the failure.",
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note_stmt="This is an issue with the package mentioned above, not pip.",
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)
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class InstallationSubprocessError(DiagnosticPipError, InstallationError):
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"""A subprocess call failed."""
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reference = "subprocess-exited-with-error"
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def __init__(
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self,
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*,
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command_description: str,
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exit_code: int,
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output_lines: Optional[List[str]],
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) -> None:
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if output_lines is None:
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output_prompt = Text("See above for output.")
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else:
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output_prompt = (
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Text.from_markup(f"[red][{len(output_lines)} lines of output][/]\n")
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+ Text("".join(output_lines))
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+ Text.from_markup(R"[red]\[end of output][/]")
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)
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super().__init__(
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message=(
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f"[green]{escape(command_description)}[/] did not run successfully.\n"
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f"exit code: {exit_code}"
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),
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context=output_prompt,
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hint_stmt=None,
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note_stmt=(
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"This error originates from a subprocess, and is likely not a "
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"problem with pip."
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),
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)
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self.command_description = command_description
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self.exit_code = exit_code
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def __str__(self) -> str:
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return f"{self.command_description} exited with {self.exit_code}"
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class MetadataGenerationFailed(InstallationSubprocessError, InstallationError):
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reference = "metadata-generation-failed"
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def __init__(
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self,
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*,
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package_details: str,
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) -> None:
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super(InstallationSubprocessError, self).__init__(
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message="Encountered error while generating package metadata.",
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context=escape(package_details),
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hint_stmt="See above for details.",
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note_stmt="This is an issue with the package mentioned above, not pip.",
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)
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def __str__(self) -> str:
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return "metadata generation failed"
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class HashErrors(InstallationError):
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"""Multiple HashError instances rolled into one for reporting"""
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def __init__(self) -> None:
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self.errors: List["HashError"] = []
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def append(self, error: "HashError") -> None:
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self.errors.append(error)
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def __str__(self) -> str:
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lines = []
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self.errors.sort(key=lambda e: e.order)
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for cls, errors_of_cls in groupby(self.errors, lambda e: e.__class__):
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lines.append(cls.head)
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lines.extend(e.body() for e in errors_of_cls)
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if lines:
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return "\n".join(lines)
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return ""
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def __bool__(self) -> bool:
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return bool(self.errors)
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class HashError(InstallationError):
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"""
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A failure to verify a package against known-good hashes
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:cvar order: An int sorting hash exception classes by difficulty of
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recovery (lower being harder), so the user doesn't bother fretting
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about unpinned packages when he has deeper issues, like VCS
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dependencies, to deal with. Also keeps error reports in a
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deterministic order.
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:cvar head: A section heading for display above potentially many
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exceptions of this kind
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:ivar req: The InstallRequirement that triggered this error. This is
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pasted on after the exception is instantiated, because it's not
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typically available earlier.
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"""
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req: Optional["InstallRequirement"] = None
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head = ""
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order: int = -1
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def body(self) -> str:
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"""Return a summary of me for display under the heading.
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This default implementation simply prints a description of the
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triggering requirement.
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:param req: The InstallRequirement that provoked this error, with
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its link already populated by the resolver's _populate_link().
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"""
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return f" {self._requirement_name()}"
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def __str__(self) -> str:
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return f"{self.head}\n{self.body()}"
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def _requirement_name(self) -> str:
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"""Return a description of the requirement that triggered me.
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This default implementation returns long description of the req, with
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line numbers
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"""
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return str(self.req) if self.req else "unknown package"
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class VcsHashUnsupported(HashError):
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"""A hash was provided for a version-control-system-based requirement, but
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we don't have a method for hashing those."""
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order = 0
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head = (
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"Can't verify hashes for these requirements because we don't "
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"have a way to hash version control repositories:"
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)
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class DirectoryUrlHashUnsupported(HashError):
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"""A hash was provided for a version-control-system-based requirement, but
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we don't have a method for hashing those."""
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order = 1
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head = (
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"Can't verify hashes for these file:// requirements because they "
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"point to directories:"
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)
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class HashMissing(HashError):
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"""A hash was needed for a requirement but is absent."""
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order = 2
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head = (
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"Hashes are required in --require-hashes mode, but they are "
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||
"missing from some requirements. Here is a list of those "
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||
"requirements along with the hashes their downloaded archives "
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||
"actually had. Add lines like these to your requirements files to "
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||
"prevent tampering. (If you did not enable --require-hashes "
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||
"manually, note that it turns on automatically when any package "
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||
"has a hash.)"
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)
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def __init__(self, gotten_hash: str) -> None:
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"""
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||
:param gotten_hash: The hash of the (possibly malicious) archive we
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just downloaded
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"""
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self.gotten_hash = gotten_hash
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def body(self) -> str:
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||
# Dodge circular import.
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||
from pip._internal.utils.hashes import FAVORITE_HASH
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||
package = None
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||
if self.req:
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||
# In the case of URL-based requirements, display the original URL
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||
# seen in the requirements file rather than the package name,
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||
# so the output can be directly copied into the requirements file.
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package = (
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self.req.original_link
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||
if self.req.original_link
|
||
# In case someone feeds something downright stupid
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||
# to InstallRequirement's constructor.
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||
else getattr(self.req, "req", None)
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||
)
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return " {} --hash={}:{}".format(
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package or "unknown package", FAVORITE_HASH, self.gotten_hash
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)
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||
class HashUnpinned(HashError):
|
||
"""A requirement had a hash specified but was not pinned to a specific
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||
version."""
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order = 3
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||
head = (
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||
"In --require-hashes mode, all requirements must have their "
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"versions pinned with ==. These do not:"
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||
)
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|
||
class HashMismatch(HashError):
|
||
"""
|
||
Distribution file hash values don't match.
|
||
|
||
:ivar package_name: The name of the package that triggered the hash
|
||
mismatch. Feel free to write to this after the exception is raise to
|
||
improve its error message.
|
||
|
||
"""
|
||
|
||
order = 4
|
||
head = (
|
||
"THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS "
|
||
"FILE. If you have updated the package versions, please update "
|
||
"the hashes. Otherwise, examine the package contents carefully; "
|
||
"someone may have tampered with them."
|
||
)
|
||
|
||
def __init__(self, allowed: Dict[str, List[str]], gots: Dict[str, "_Hash"]) -> None:
|
||
"""
|
||
:param allowed: A dict of algorithm names pointing to lists of allowed
|
||
hex digests
|
||
:param gots: A dict of algorithm names pointing to hashes we
|
||
actually got from the files under suspicion
|
||
"""
|
||
self.allowed = allowed
|
||
self.gots = gots
|
||
|
||
def body(self) -> str:
|
||
return " {}:\n{}".format(self._requirement_name(), self._hash_comparison())
|
||
|
||
def _hash_comparison(self) -> str:
|
||
"""
|
||
Return a comparison of actual and expected hash values.
|
||
|
||
Example::
|
||
|
||
Expected sha256 abcdeabcdeabcdeabcdeabcdeabcdeabcdeabcdeabcde
|
||
or 123451234512345123451234512345123451234512345
|
||
Got bcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdef
|
||
|
||
"""
|
||
|
||
def hash_then_or(hash_name: str) -> "chain[str]":
|
||
# For now, all the decent hashes have 6-char names, so we can get
|
||
# away with hard-coding space literals.
|
||
return chain([hash_name], repeat(" or"))
|
||
|
||
lines: List[str] = []
|
||
for hash_name, expecteds in self.allowed.items():
|
||
prefix = hash_then_or(hash_name)
|
||
lines.extend(
|
||
(" Expected {} {}".format(next(prefix), e)) for e in expecteds
|
||
)
|
||
lines.append(
|
||
" Got {}\n".format(self.gots[hash_name].hexdigest())
|
||
)
|
||
return "\n".join(lines)
|
||
|
||
|
||
class UnsupportedPythonVersion(InstallationError):
|
||
"""Unsupported python version according to Requires-Python package
|
||
metadata."""
|
||
|
||
|
||
class ConfigurationFileCouldNotBeLoaded(ConfigurationError):
|
||
"""When there are errors while loading a configuration file"""
|
||
|
||
def __init__(
|
||
self,
|
||
reason: str = "could not be loaded",
|
||
fname: Optional[str] = None,
|
||
error: Optional[configparser.Error] = None,
|
||
) -> None:
|
||
super().__init__(error)
|
||
self.reason = reason
|
||
self.fname = fname
|
||
self.error = error
|
||
|
||
def __str__(self) -> str:
|
||
if self.fname is not None:
|
||
message_part = f" in {self.fname}."
|
||
else:
|
||
assert self.error is not None
|
||
message_part = f".\n{self.error}\n"
|
||
return f"Configuration file {self.reason}{message_part}"
|