25683017529

Committed 11 May 2026 04:27PM UTC coverage: 91.788% (-0.04%) from 91.823%

Build # 25683017529

Build Type

push

github

Committed by

web-flow

Commit Message

Bump urllib3 from 2.6.3 to 2.7.0 in /CI (#2354)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.6.3 to 2.7.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/urllib3/urllib3/releases">urllib3's
releases</a>.</em></p>
<blockquote>
<h2>2.7.0</h2>
<h2>🚀 urllib3 is fundraising for HTTP/2 support</h2>
<p><a
href="https://sethmlarson.dev/urllib3-is-fundraising-for-http2-support">urllib3
is raising ~$40,000 USD</a> to release HTTP/2 support and ensure
long-term sustainable maintenance of the project after a sharp decline
in financial support. If your company or organization uses Python and
would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and
thousands of other projects <a
href="https://opencollective.com/urllib3">please consider contributing
financially</a> to ensure HTTP/2 support is developed sustainably and
maintained for the long-haul.</p>
<p>Thank you for your support.</p>
<h2>Security</h2>
<p>Addressed high-severity security issues. Impact was limited to
specific use cases detailed in the accompanying advisories; overall user
exposure was estimated to be marginal.</p>
<ul>
<li>
<p>Decompression-bomb safeguards of the streaming API were bypassed:</p>
<ol>
<li>When <code>HTTPResponse.drain_conn()</code> was called after the
response had been read and decompressed partially. (Reported by <a
href="https://github.com/Cycloctane"><code>@Cycloctane</code></a>)</li>
<li>During the second <code>HTTPResponse.read(amt=N)</code> or
<code>HTTPResponse.stream(amt=N)</code> call when the response was
decompressed using the official <a
href="https://pypi.org/project/brotli/">Brotli</a> library. (Reported by
<a
href="https://github.com/kimkou2024"><code>@kimkou2024</code></a>)</li>
</ol>
<p>See GHSA-mf9v-mfxr-j63j for details.</p>
</li>
<li>
<p>HTTP pools created using
<code>ProxyManager.connection_from_url</code> did not strip sensitive
headers specified in <code>Retry.remove_headers_on_redirect</... (continued)

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77.37

/src/xclim/testing/utils.py

"""
Testing and Tutorial Utilities' Module
======================================
"""

from __future__ import annotations

import importlib.metadata as ilm
import importlib.resources as ilr
import logging
import os
import platform
import re
import sys
import time
import warnings
from collections.abc import Callable, Iterable, Sequence
from datetime import datetime as dt
from functools import wraps
from importlib.metadata import PackageNotFoundError
from io import StringIO
from pathlib import Path
from shutil import copytree
from typing import IO, Any, TextIO
from urllib.error import HTTPError, URLError
from urllib.parse import urljoin, urlparse
from urllib.request import urlretrieve

from filelock import FileLock
from packaging.version import Version
from xarray import Dataset
from xarray import open_dataset as _open_dataset

import xclim
from xclim import __version__ as __xclim_version__

try:
    import pytest
    from pytest_socket import SocketBlockedError
except ImportError:
    pytest = None

    class SocketBlockedError(Exception):
        pass


try:
    import pooch
except ImportError:
    warnings.warn("The `pooch` library is not installed. The default cache directory for testing data will not be set.")
    pooch = None


logger = logging.getLogger("xclim")


__all__ = [
    "TESTDATA_BRANCH",
    "TESTDATA_CACHE_DIR",
    "TESTDATA_REPO_URL",
    "audit_url",
    "default_testdata_cache",
    "default_testdata_repo_url",
    "default_testdata_version",
    "gather_testing_data",
    "list_input_variables",
    "nimbus",
    "open_dataset",
    "populate_testing_data",
    "publish_release_notes",
    "run_doctests",
    "show_versions",
    "testing_setup_warnings",
]

default_testdata_version = "v2025.4.29"
"""Default version of the testing data to use when fetching datasets."""

default_testdata_repo_url = "https://raw.githubusercontent.com/Ouranosinc/xclim-testdata/"
"""Default URL of the testing data repository to use when fetching datasets."""

try:
    default_testdata_cache = Path(pooch.os_cache("xclim-testdata"))
    """Default location for the testing data cache."""
except (AttributeError, TypeError):
    default_testdata_cache = None

TESTDATA_REPO_URL = str(os.getenv("XCLIM_TESTDATA_REPO_URL", default_testdata_repo_url))
"""
Sets the URL of the testing data repository to use when fetching datasets.

Notes
-----
When running tests locally, this can be set for both `pytest` and `tox` by exporting the variable:

.. code-block:: console

    $ export XCLIM_TESTDATA_REPO_URL="https://github.com/my_username/xclim-testdata"

or setting the variable at runtime:

.. code-block:: console

    $ env XCLIM_TESTDATA_REPO_URL="https://github.com/my_username/xclim-testdata" pytest
"""

TESTDATA_BRANCH = str(os.getenv("XCLIM_TESTDATA_BRANCH", default_testdata_version))
"""
Sets the branch of the testing data repository to use when fetching datasets.

Notes
-----
When running tests locally, this can be set for both `pytest` and `tox` by exporting the variable:

.. code-block:: console

    $ export XCLIM_TESTDATA_BRANCH="my_testing_branch"

or setting the variable at runtime:

.. code-block:: console

    $ env XCLIM_TESTDATA_BRANCH="my_testing_branch" pytest
"""

TESTDATA_CACHE_DIR = os.getenv("XCLIM_TESTDATA_CACHE_DIR", default_testdata_cache)
"""
Sets the directory to store the testing datasets.

If not set, the default location will be used (based on ``platformdirs``, see :func:`pooch.os_cache`).

Notes
-----
When running tests locally, this can be set for both `pytest` and `tox` by exporting the variable:

.. code-block:: console

    $ export XCLIM_TESTDATA_CACHE_DIR="/path/to/my/data"

or setting the variable at runtime:

.. code-block:: console

    $ env XCLIM_TESTDATA_CACHE_DIR="/path/to/my/data" pytest
"""


def list_input_variables(submodules: Sequence[str] | None = None, realms: Sequence[str] | None = None) -> dict:
    """
    List all possible variables names used in xclim's indicators.

    Made for development purposes. Parses all indicator parameters with the
    :py:attr:`xclim.core.utils.InputKind.VARIABLE` or `OPTIONAL_VARIABLE` kinds.

    Parameters
    ----------
    submodules : str, optional
        Restrict the output to indicators of a list of submodules only. Default None, which parses all indicators.
    realms : Sequence of str, optional
        Restrict the output to indicators of a list of realms only. Default None, which parses all indicators.

    Returns
    -------
    dict
        A mapping from variable name to indicator class.
    """
    from collections import defaultdict  # pylint: disable=import-outside-toplevel

    from xclim import indicators  # pylint: disable=import-outside-toplevel
    from xclim.core.indicator import registry  # pylint: disable=import-outside-toplevel
    from xclim.core.utils import InputKind  # pylint: disable=import-outside-toplevel

    submodules = submodules or [sub for sub in dir(indicators) if not sub.startswith("__")]
    realms = realms or ["atmos", "ocean", "land", "seaIce"]

    variables = defaultdict(list)
    for name, ind in registry.items():
        if "." in name:
            # external submodule, submodule name is prepended to registry key
            if name.split(".")[0] not in submodules:
                continue
        elif ind.realm not in submodules:
            # official indicator : realm == submodule
            continue
        if ind.realm not in realms:
            continue

        # ok we want this one.
        for varname, meta in ind._all_parameters.items():
            if meta.kind in [
                InputKind.VARIABLE,
                InputKind.OPTIONAL_VARIABLE,
            ]:
                var = meta.default or varname
                variables[var].append(ind)

    return variables


# Publishing Tools ###


def publish_release_notes(
    style: str = "md",
    file: os.PathLike[str] | StringIO | TextIO | None = None,
    changes: str | os.PathLike[str] | None = None,
) -> str | None:
    """
    Format release notes in Markdown or ReStructuredText.

    Parameters
    ----------
    style : {"rst", "md"}
        Use ReStructuredText formatting or Markdown. Default: Markdown.
    file : {os.PathLike, StringIO, TextIO}, optional
        If provided, prints to the given file-like object. Otherwise, returns a string.
    changes : str or os.PathLike[str], optional
        If provided, manually points to the file where the changelog can be found.
        Assumes a relative path otherwise.

    Returns
    -------
    str, optional
        If `file` not provided, the formatted release notes.

    Notes
    -----
    This function is used solely for development and packaging purposes.
    """
    if isinstance(changes, str | Path):
        changes_file = Path(changes).absolute()
    else:
        changes_file = Path(__file__).absolute().parents[3].joinpath("CHANGELOG.rst")

    if not changes_file.exists():
        raise FileNotFoundError("Changelog file not found in xclim folder tree.")

    with open(changes_file, encoding="utf-8") as hf:
        changes = hf.read()

    if style == "rst":
        hyperlink_replacements = {
            r":issue:`([0-9]+)`": r"`GH/\1 <https://github.com/Ouranosinc/xclim/issues/\1>`_",
            r":pull:`([0-9]+)`": r"`PR/\1 <https://github.com/Ouranosinc/xclim/pull/\>`_",
            r":user:`([a-zA-Z0-9_.-]+)`": r"`@\1 <https://github.com/\1>`_",
        }
    elif style == "md":
        hyperlink_replacements = {
            r":issue:`([0-9]+)`": r"[GH/\1](https://github.com/Ouranosinc/xclim/issues/\1)",
            r":pull:`([0-9]+)`": r"[PR/\1](https://github.com/Ouranosinc/xclim/pull/\1)",
            r":user:`([a-zA-Z0-9_.-]+)`": r"[@\1](https://github.com/\1)",
        }
    else:
        msg = f"Formatting style not supported: {style}"
        raise NotImplementedError(msg)

    for search, replacement in hyperlink_replacements.items():
        changes = re.sub(search, replacement, changes)

    if style == "md":
        changes = changes.replace("=========\nChangelog\n=========", "# Changelog")

        titles = {r"\n(.*?)\n([\-]{1,})": "-", r"\n(.*?)\n([\^]{1,})": "^"}
        for title_expression, level in titles.items():
            found = re.findall(title_expression, changes)
            for grouping in found:
                fixed_grouping = str(grouping[0]).replace("(", r"\(").replace(")", r"\)")
                search = rf"({fixed_grouping})\n([\{level}]{'{' + str(len(grouping[1])) + '}'})"
                replacement = f"{'##' if level == '-' else '###'} {grouping[0]}"
                changes = re.sub(search, replacement, changes)

        link_expressions = r"[\`]{1}([\w\s]+)\s<(.+)>`\_"
        found = re.findall(link_expressions, changes)
        for grouping in found:
            search = rf"`{grouping[0]} <.+>`\_"
            replacement = f"[{str(grouping[0]).strip()}]({grouping[1]})"
            changes = re.sub(search, replacement, changes)

    if not file:
        return changes
    if isinstance(file, Path | os.PathLike):
        with open(file, "w", encoding="utf-8") as f:
            print(changes, file=f)
    else:
        print(changes, file=file)
    return None


_xclim_deps = [
    "xclim",
    "xarray",
    "statsmodels",
    "scikit-learn",
    "scipy",
    "pint",
    "pandas",
    "numpy",
    "numba",
    "lmoments3",
    "jsonpickle",
    "flox",
    "dask",
    "cf_xarray",
    "cftime",
    "clisops",
    "click",
    "bottleneck",
    "boltons",
]


def show_versions(
    file: os.PathLike | StringIO | TextIO | None = None,
    deps: Iterable[str] | None = None,
) -> str | None:
    """
    Print the versions of xclim and its dependencies.

    Parameters
    ----------
    file : {os.PathLike, StringIO, TextIO}, optional
        If provided, prints to the given file-like object. Otherwise, returns a string.
    deps : iterable of str, optional
        An iterable of dependencies to gather and print version information from.
        Otherwise, prints `xclim` dependencies.

    Returns
    -------
    str or None
        If `file` not provided, the versions of xclim and its dependencies.
    """
    dependencies: list[str]
    if deps is None:
        dependencies = _xclim_deps
    else:
        dependencies = deps

    dependency_versions = {}
    for d in dependencies:
        try:
            _version = ilm.version(d)
        except PackageNotFoundError:
            _version = None
        dependency_versions[d] = _version

    modules_versions = "\n".join([f"{k}: {stat}" for k, stat in sorted(dependency_versions.items())])

    installed_versions = [
        "INSTALLED VERSIONS",
        "------------------",
        f"python: {platform.python_version()}",
        f"{modules_versions}",
        f"Anaconda-based environment: {'yes' if Path(sys.base_prefix).joinpath('conda-meta').exists() else 'no'}",
    ]

    message = "\n".join(installed_versions)

    if not file:
        return message
    if isinstance(file, Path | os.PathLike):
        with open(file, "w", encoding="utf-8") as f:
            print(message, file=f)
    else:
        print(message, file=file)
    return None


# Test Data Utilities ###


def run_doctests():
    """Run the doctests for the module."""
    if pytest is None:
        raise ImportError(
            "The `pytest` package is required to run the doctests. "
            "You can install it with `pip install pytest` or `pip install xclim[dev]`."
        )

    cmd = [
        f"--rootdir={Path(__file__).absolute().parent}",
        "--numprocesses=0",
        "--xdoctest",
        f"{Path(__file__).absolute().parents[1]}",
    ]

    sys.exit(pytest.main(cmd))


def testing_setup_warnings():
    """Warn users about potential incompatibilities between xclim and xclim-testdata versions."""
    if re.match(r"^\d+\.\d+\.\d+$", __xclim_version__) and TESTDATA_BRANCH != default_testdata_version:
        # This does not need to be emitted on GitHub Workflows and ReadTheDocs
        if not os.getenv("CI") and not os.getenv("READTHEDOCS"):
            warnings.warn(
                f"`xclim` stable ({__xclim_version__}) is running tests against a non-default "
                f"branch of the testing data. It is possible that changes to the testing data may "
                f"be incompatible with some assertions in this version. "
                f"Please be sure to check {TESTDATA_REPO_URL} for more information.",
            )

    if re.match(r"^v\d+\.\d+\.\d+", TESTDATA_BRANCH):
        # Find the date of last modification of xclim source files to generate a calendar version
        install_date = dt.strptime(
            time.ctime(os.path.getmtime(xclim.__file__)),
            "%a %b %d %H:%M:%S %Y",
        )
        install_calendar_version = f"{install_date.year}.{install_date.month}.{install_date.day}"

        if Version(TESTDATA_BRANCH) > Version(install_calendar_version):
            warnings.warn(
                f"The installation date of `xclim` ({install_date.ctime()}) "
                f"predates the last release of testing data ({TESTDATA_BRANCH}). "
                "It is very likely that the testing data is incompatible with this build of `xclim`.",
            )


def load_registry(branch: str = TESTDATA_BRANCH, repo: str = TESTDATA_REPO_URL) -> dict[str, str]:
    """
    Load the registry file for the test data.

    Parameters
    ----------
    branch : str
        Branch of the repository to use when fetching testing datasets.
    repo : str
        URL of the repository to use when fetching testing datasets.

    Returns
    -------
    dict
        Dictionary of filenames and hashes.
    """
    if not repo.endswith("/"):
        repo = f"{repo}/"
    remote_registry = audit_url(
        urljoin(
            urljoin(repo, branch if branch.endswith("/") else f"{branch}/"),
            "data/registry.txt",
        )
    )

    if repo != default_testdata_repo_url:
        external_repo_name = urlparse(repo).path.split("/")[-2]
        external_branch_name = branch.split("/")[-1]
        registry_file = Path(
            str(ilr.files("xclim").joinpath(f"testing/registry.{external_repo_name}.{external_branch_name}.txt"))
        )
        urlretrieve(remote_registry, registry_file)  # noqa: S310

    elif branch != default_testdata_version:
        custom_registry_folder = Path(str(ilr.files("xclim").joinpath(f"testing/{branch}")))
        custom_registry_folder.mkdir(parents=True, exist_ok=True)
        registry_file = custom_registry_folder.joinpath("registry.txt")
        urlretrieve(remote_registry, registry_file)  # noqa: S310

    else:
        registry_file = Path(str(ilr.files("xclim").joinpath("testing/registry.txt")))

    if not registry_file.exists():
        raise FileNotFoundError(f"Registry file not found: {registry_file}")

    # Load the registry file
    with registry_file.open(encoding="utf-8") as f:
        registry = {line.split()[0]: line.split()[1] for line in f}
    return registry


def nimbus(
    repo: str = TESTDATA_REPO_URL,
    branch: str = TESTDATA_BRANCH,
    cache_dir: str | Path = TESTDATA_CACHE_DIR,
    allow_updates: bool = True,
):
    """
    Pooch registry instance for xclim test data.

    Parameters
    ----------
    repo : str
        URL of the repository to use when fetching testing datasets.
    branch : str
        Branch of repository to use when fetching testing datasets.
    cache_dir : str or Path
        The path to the directory where the data files are stored.
    allow_updates : bool
        If True, allow updates to the data files. Default is True.

    Returns
    -------
    pooch.Pooch
        The Pooch instance for accessing the xclim testing data.

    Notes
    -----
    There are three environment variables that can be used to control the behaviour of this registry:
        - ``XCLIM_TESTDATA_CACHE_DIR``: If this environment variable is set, it will be used as the
          base directory to store the data files.
          The directory should be an absolute path (i.e., it should start with ``/``).
          Otherwise, the default location will be used (based on ``platformdirs``, see :py:func:`pooch.os_cache`).
        - ``XCLIM_TESTDATA_REPO_URL``: If this environment variable is set, it will be used as the URL of
          the repository to use when fetching datasets. Otherwise, the default repository will be used.
        - ``XCLIM_TESTDATA_BRANCH``: If this environment variable is set, it will be used as the branch of
          the repository to use when fetching datasets. Otherwise, the default branch will be used.

    Examples
    --------
    Using the registry to download a file:

    .. code-block:: python

        import xarray as xr
        from xclim.testing.helpers import nimbus

        example_file = nimbus().fetch("example.nc")
        data = xr.open_dataset(example_file)
    """
    if pooch is None:
        raise ImportError(
            "The `pooch` package is required to fetch the xclim testing data. "
            "You can install it with `pip install pooch` or `pip install xclim[dev]`."
        )
    if not repo.endswith("/"):
        repo = f"{repo}/"
    remote = audit_url(urljoin(urljoin(repo, branch if branch.endswith("/") else f"{branch}/"), "data"))

    _nimbus = pooch.create(
        path=cache_dir,
        base_url=remote,
        version=default_testdata_version,
        version_dev=branch,
        allow_updates=allow_updates,
        registry=load_registry(branch=branch, repo=repo),
    )

    # Add a custom fetch method to the Pooch instance
    # Needed to address: https://github.com/readthedocs/readthedocs.org/issues/11763
    # Fix inspired by @bjlittle (https://github.com/bjlittle/geovista/pull/1202)
    _nimbus.fetch_diversion = _nimbus.fetch

    # Overload the fetch method to add user-agent headers
    @wraps(_nimbus.fetch_diversion)
    def _fetch(*args, **kwargs: bool | Callable) -> str:  # numpydoc ignore=GL08  # *args: str
        def _downloader(
            url: str,
            output_file: str | IO,
            poocher: pooch.Pooch,
            check_only: bool | None = False,
        ) -> None:
            """Download the file from the URL and save it to the save_path."""
            headers = {"User-Agent": f"xclim ({__xclim_version__})"}
            downloader = pooch.HTTPDownloader(headers=headers)
            return downloader(url, output_file, poocher, check_only=check_only)

        # default to our http/s downloader with user-agent headers
        kwargs.setdefault("downloader", _downloader)
        try:
            return _nimbus.fetch_diversion(*args, **kwargs)
        except SocketBlockedError as err:
            raise FileNotFoundError(
                "File was not found in the testing data cache and remote socket connections are disabled. "
                "You may need to download the testing data using `xclim prefetch_testing_data`."
            ) from err

    # Replace the fetch method with the custom fetch method
    _nimbus.fetch = _fetch

    return _nimbus


def open_dataset(name: str, nimbus_kwargs: dict[str, Path | str | bool] | None = None, **xr_kwargs: Any) -> Dataset:
    r"""
    Convenience function to open a dataset from the xclim testing data using the `nimbus` class.

    This is a thin wrapper around the `nimbus` class to make it easier to open xclim testing datasets.

    Parameters
    ----------
    name : str
        Name of the file containing the dataset.
    nimbus_kwargs : dict
        Keyword arguments passed to the nimbus function.
    **xr_kwargs : Any
        Keyword arguments passed to xarray.open_dataset.

    Returns
    -------
    xarray.Dataset
        The dataset.

    See Also
    --------
    xarray.open_dataset : Open and read a dataset from a file or file-like object.
    nimbus : Pooch wrapper for accessing the xclim testing data.

    Notes
    -----
    As of `xclim` v0.57.0, this function no longer supports the `dap_url` parameter. For OPeNDAP datasets, use
    `xarray.open_dataset` directly using the OPeNDAP URL with an appropriate backend installed (netCDF4, pydap, etc.).
    """
    if nimbus_kwargs is None:
        nimbus_kwargs = {}
    return _open_dataset(nimbus(**nimbus_kwargs).fetch(name), **xr_kwargs)


def populate_testing_data(
    temp_folder: Path | None = None,
    repo: str = TESTDATA_REPO_URL,
    branch: str = TESTDATA_BRANCH,
    local_cache: Path = TESTDATA_CACHE_DIR,
) -> None:
    """
    Populate the local cache with the testing data.

    Parameters
    ----------
    temp_folder : Path, optional
        Path to a temporary folder to use as the local cache. If not provided, the default location will be used.
    repo : str, optional
        URL of the repository to use when fetching testing datasets.
    branch : str, optional
        Branch of xclim-testdata to use when fetching testing datasets.
    local_cache : Path
        The path to the local cache. Defaults to the location set by the platformdirs library.
        The testing data will be downloaded to this local cache.
    """
    # Create the Pooch instance
    n = nimbus(repo=repo, branch=branch, cache_dir=temp_folder or local_cache)

    # Download the files
    errored_files = []
    for file in load_registry():
        try:
            n.fetch(file)
        except HTTPError:
            msg = f"File `{file}` not accessible in remote repository."
            logging.error(msg)
            errored_files.append(file)
        except SocketBlockedError as err:
            msg = (
                "Unable to access registry file online. Testing suite is being run with `--disable-socket`. "
                "If you intend to run tests with this option enabled, please download the file beforehand with the "
                "following console command: `$ xclim prefetch_testing_data`."
            )
            raise SocketBlockedError(msg) from err
        else:
            logging.info("Files were downloaded successfully.")

    if errored_files:
        logging.error(
            "The following files were unable to be downloaded: %s",
            errored_files,
        )


def gather_testing_data(
    worker_cache_dir: str | os.PathLike[str] | Path,
    worker_id: str,
    _cache_dir: str | os.PathLike[str] | None = TESTDATA_CACHE_DIR,
) -> None:
    """
    Gather testing data across workers.

    Parameters
    ----------
    worker_cache_dir : str or Path
        The directory to store the testing data.
    worker_id : str
        The worker ID.
    _cache_dir : str or Path, optional
        The directory to store the testing data. Default is None.

    Raises
    ------
    ValueError
        If the cache directory is not set.
    FileNotFoundError
        If the testing data is not found.
    """
    if _cache_dir is None:
        raise ValueError(
            "The cache directory must be set. "
            "Please set the `cache_dir` parameter or the `XCLIM_DATA_DIR` environment variable."
        )
    cache_dir = Path(_cache_dir)

    if worker_id == "master":
        populate_testing_data(branch=TESTDATA_BRANCH)
    else:
        if platform.system() == "Windows":
            if not cache_dir.joinpath(default_testdata_version).exists():
                raise FileNotFoundError(
                    "Testing data not found and UNIX-style file-locking is not supported on Windows. "
                    "Consider running `$ xclim prefetch_testing_data` to download testing data beforehand."
                )
        else:
            cache_dir.mkdir(exist_ok=True, parents=True)
            lockfile = cache_dir.joinpath(".lock")
            test_data_being_written = FileLock(lockfile)
            with test_data_being_written:
                # This flag prevents multiple calls from re-attempting to download testing data in the same pytest run
                populate_testing_data(branch=TESTDATA_BRANCH)
                cache_dir.joinpath(".data_written").touch()
            with test_data_being_written.acquire():
                if lockfile.exists():
                    lockfile.unlink()
        copytree(cache_dir.joinpath(default_testdata_version), worker_cache_dir)


# Testing Utilities ###


def audit_url(url: str, context: str | None = None) -> str:
    """
    Check if the URL is well-formed.

    Parameters
    ----------
    url : str
        The URL to check.
    context : str, optional
        Additional context to include in the error message. Default is None.

    Returns
    -------
    str
        The URL if it is well-formed.

    Raises
    ------
    URLError
        If the URL is not well-formed.
    """
    msg = ""
    result = urlparse(url)
    if result.scheme == "http":
        msg = f"{context if context else ''} URL is not using secure HTTP: '{url}'".strip()
    if not all([result.scheme, result.netloc]):
        msg = f"{context if context else ''} URL is not well-formed: '{url}'".strip()

    if msg:
        logger.error(msg)
        raise URLError(msg)
    return url

Ouranosinc / xclim / 25683017529

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