1. PostgreSQL copy of all MySQL created and tested.\n 2. Purchase Orders and Sales Orders and stock level management added to MySQL, PostgreSQL, and server and front end code.
This commit is contained in:
285
env_web/Lib/site-packages/pip/_internal/index/sources.py
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285
env_web/Lib/site-packages/pip/_internal/index/sources.py
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import logging
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import mimetypes
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import os
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from collections import defaultdict
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from typing import Callable, Dict, Iterable, List, Optional, Tuple
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from pip._vendor.packaging.utils import (
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InvalidSdistFilename,
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InvalidVersion,
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InvalidWheelFilename,
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canonicalize_name,
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parse_sdist_filename,
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parse_wheel_filename,
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)
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from pip._internal.models.candidate import InstallationCandidate
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from pip._internal.models.link import Link
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from pip._internal.utils.urls import path_to_url, url_to_path
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from pip._internal.vcs import is_url
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logger = logging.getLogger(__name__)
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FoundCandidates = Iterable[InstallationCandidate]
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FoundLinks = Iterable[Link]
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CandidatesFromPage = Callable[[Link], Iterable[InstallationCandidate]]
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PageValidator = Callable[[Link], bool]
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class LinkSource:
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@property
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def link(self) -> Optional[Link]:
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"""Returns the underlying link, if there's one."""
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raise NotImplementedError()
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def page_candidates(self) -> FoundCandidates:
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"""Candidates found by parsing an archive listing HTML file."""
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raise NotImplementedError()
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def file_links(self) -> FoundLinks:
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"""Links found by specifying archives directly."""
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raise NotImplementedError()
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def _is_html_file(file_url: str) -> bool:
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return mimetypes.guess_type(file_url, strict=False)[0] == "text/html"
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class _FlatDirectoryToUrls:
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"""Scans directory and caches results"""
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def __init__(self, path: str) -> None:
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self._path = path
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self._page_candidates: List[str] = []
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self._project_name_to_urls: Dict[str, List[str]] = defaultdict(list)
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self._scanned_directory = False
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def _scan_directory(self) -> None:
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"""Scans directory once and populates both page_candidates
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and project_name_to_urls at the same time
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"""
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for entry in os.scandir(self._path):
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url = path_to_url(entry.path)
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if _is_html_file(url):
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self._page_candidates.append(url)
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continue
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# File must have a valid wheel or sdist name,
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# otherwise not worth considering as a package
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try:
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project_filename = parse_wheel_filename(entry.name)[0]
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except (InvalidWheelFilename, InvalidVersion):
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try:
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project_filename = parse_sdist_filename(entry.name)[0]
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except (InvalidSdistFilename, InvalidVersion):
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continue
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self._project_name_to_urls[project_filename].append(url)
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self._scanned_directory = True
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@property
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def page_candidates(self) -> List[str]:
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if not self._scanned_directory:
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self._scan_directory()
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return self._page_candidates
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@property
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def project_name_to_urls(self) -> Dict[str, List[str]]:
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if not self._scanned_directory:
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self._scan_directory()
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return self._project_name_to_urls
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class _FlatDirectorySource(LinkSource):
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"""Link source specified by ``--find-links=<path-to-dir>``.
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This looks the content of the directory, and returns:
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* ``page_candidates``: Links listed on each HTML file in the directory.
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* ``file_candidates``: Archives in the directory.
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"""
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_paths_to_urls: Dict[str, _FlatDirectoryToUrls] = {}
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def __init__(
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self,
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candidates_from_page: CandidatesFromPage,
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path: str,
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project_name: str,
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) -> None:
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self._candidates_from_page = candidates_from_page
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self._project_name = canonicalize_name(project_name)
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# Get existing instance of _FlatDirectoryToUrls if it exists
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if path in self._paths_to_urls:
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self._path_to_urls = self._paths_to_urls[path]
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else:
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self._path_to_urls = _FlatDirectoryToUrls(path=path)
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self._paths_to_urls[path] = self._path_to_urls
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@property
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def link(self) -> Optional[Link]:
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return None
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def page_candidates(self) -> FoundCandidates:
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for url in self._path_to_urls.page_candidates:
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yield from self._candidates_from_page(Link(url))
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def file_links(self) -> FoundLinks:
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for url in self._path_to_urls.project_name_to_urls[self._project_name]:
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yield Link(url)
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class _LocalFileSource(LinkSource):
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"""``--find-links=<path-or-url>`` or ``--[extra-]index-url=<path-or-url>``.
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If a URL is supplied, it must be a ``file:`` URL. If a path is supplied to
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the option, it is converted to a URL first. This returns:
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* ``page_candidates``: Links listed on an HTML file.
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* ``file_candidates``: The non-HTML file.
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"""
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def __init__(
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self,
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candidates_from_page: CandidatesFromPage,
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link: Link,
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) -> None:
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self._candidates_from_page = candidates_from_page
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self._link = link
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@property
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def link(self) -> Optional[Link]:
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return self._link
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def page_candidates(self) -> FoundCandidates:
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if not _is_html_file(self._link.url):
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return
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yield from self._candidates_from_page(self._link)
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def file_links(self) -> FoundLinks:
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if _is_html_file(self._link.url):
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return
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yield self._link
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class _RemoteFileSource(LinkSource):
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"""``--find-links=<url>`` or ``--[extra-]index-url=<url>``.
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This returns:
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* ``page_candidates``: Links listed on an HTML file.
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* ``file_candidates``: The non-HTML file.
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"""
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def __init__(
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self,
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candidates_from_page: CandidatesFromPage,
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page_validator: PageValidator,
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link: Link,
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) -> None:
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self._candidates_from_page = candidates_from_page
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self._page_validator = page_validator
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self._link = link
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@property
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def link(self) -> Optional[Link]:
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return self._link
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def page_candidates(self) -> FoundCandidates:
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if not self._page_validator(self._link):
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return
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yield from self._candidates_from_page(self._link)
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def file_links(self) -> FoundLinks:
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yield self._link
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class _IndexDirectorySource(LinkSource):
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"""``--[extra-]index-url=<path-to-directory>``.
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This is treated like a remote URL; ``candidates_from_page`` contains logic
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for this by appending ``index.html`` to the link.
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"""
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def __init__(
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self,
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candidates_from_page: CandidatesFromPage,
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link: Link,
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) -> None:
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self._candidates_from_page = candidates_from_page
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self._link = link
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@property
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def link(self) -> Optional[Link]:
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return self._link
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def page_candidates(self) -> FoundCandidates:
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yield from self._candidates_from_page(self._link)
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def file_links(self) -> FoundLinks:
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return ()
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def build_source(
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location: str,
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*,
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candidates_from_page: CandidatesFromPage,
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page_validator: PageValidator,
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expand_dir: bool,
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cache_link_parsing: bool,
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project_name: str,
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) -> Tuple[Optional[str], Optional[LinkSource]]:
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path: Optional[str] = None
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url: Optional[str] = None
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if os.path.exists(location): # Is a local path.
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url = path_to_url(location)
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path = location
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elif location.startswith("file:"): # A file: URL.
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url = location
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path = url_to_path(location)
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elif is_url(location):
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url = location
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if url is None:
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msg = (
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"Location '%s' is ignored: "
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"it is either a non-existing path or lacks a specific scheme."
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)
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logger.warning(msg, location)
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return (None, None)
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if path is None:
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source: LinkSource = _RemoteFileSource(
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candidates_from_page=candidates_from_page,
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page_validator=page_validator,
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link=Link(url, cache_link_parsing=cache_link_parsing),
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)
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return (url, source)
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if os.path.isdir(path):
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if expand_dir:
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source = _FlatDirectorySource(
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candidates_from_page=candidates_from_page,
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path=path,
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project_name=project_name,
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)
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else:
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source = _IndexDirectorySource(
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candidates_from_page=candidates_from_page,
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link=Link(url, cache_link_parsing=cache_link_parsing),
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)
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return (url, source)
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elif os.path.isfile(path):
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source = _LocalFileSource(
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candidates_from_page=candidates_from_page,
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link=Link(url, cache_link_parsing=cache_link_parsing),
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)
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return (url, source)
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logger.warning(
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"Location '%s' is ignored: it is neither a file nor a directory.",
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location,
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)
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return (url, None)
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