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Diffstat (limited to '.venv/lib/python3.12/site-packages/pip/_internal/req/req_file.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/pip/_internal/req/req_file.py | 623 |
1 files changed, 623 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/pip/_internal/req/req_file.py b/.venv/lib/python3.12/site-packages/pip/_internal/req/req_file.py new file mode 100644 index 00000000..f6ba70fe --- /dev/null +++ b/.venv/lib/python3.12/site-packages/pip/_internal/req/req_file.py @@ -0,0 +1,623 @@ +""" +Requirements file parsing +""" + +import codecs +import locale +import logging +import optparse +import os +import re +import shlex +import sys +import urllib.parse +from dataclasses import dataclass +from optparse import Values +from typing import ( + TYPE_CHECKING, + Any, + Callable, + Dict, + Generator, + Iterable, + List, + NoReturn, + Optional, + Tuple, +) + +from pip._internal.cli import cmdoptions +from pip._internal.exceptions import InstallationError, RequirementsFileParseError +from pip._internal.models.search_scope import SearchScope + +if TYPE_CHECKING: + from pip._internal.index.package_finder import PackageFinder + from pip._internal.network.session import PipSession + +__all__ = ["parse_requirements"] + +ReqFileLines = Iterable[Tuple[int, str]] + +LineParser = Callable[[str], Tuple[str, Values]] + +SCHEME_RE = re.compile(r"^(http|https|file):", re.I) +COMMENT_RE = re.compile(r"(^|\s+)#.*$") + +# Matches environment variable-style values in '${MY_VARIABLE_1}' with the +# variable name consisting of only uppercase letters, digits or the '_' +# (underscore). This follows the POSIX standard defined in IEEE Std 1003.1, +# 2013 Edition. +ENV_VAR_RE = re.compile(r"(?P<var>\$\{(?P<name>[A-Z0-9_]+)\})") + +SUPPORTED_OPTIONS: List[Callable[..., optparse.Option]] = [ + cmdoptions.index_url, + cmdoptions.extra_index_url, + cmdoptions.no_index, + cmdoptions.constraints, + cmdoptions.requirements, + cmdoptions.editable, + cmdoptions.find_links, + cmdoptions.no_binary, + cmdoptions.only_binary, + cmdoptions.prefer_binary, + cmdoptions.require_hashes, + cmdoptions.pre, + cmdoptions.trusted_host, + cmdoptions.use_new_feature, +] + +# options to be passed to requirements +SUPPORTED_OPTIONS_REQ: List[Callable[..., optparse.Option]] = [ + cmdoptions.global_options, + cmdoptions.hash, + cmdoptions.config_settings, +] + +SUPPORTED_OPTIONS_EDITABLE_REQ: List[Callable[..., optparse.Option]] = [ + cmdoptions.config_settings, +] + + +# the 'dest' string values +SUPPORTED_OPTIONS_REQ_DEST = [str(o().dest) for o in SUPPORTED_OPTIONS_REQ] +SUPPORTED_OPTIONS_EDITABLE_REQ_DEST = [ + str(o().dest) for o in SUPPORTED_OPTIONS_EDITABLE_REQ +] + +# order of BOMS is important: codecs.BOM_UTF16_LE is a prefix of codecs.BOM_UTF32_LE +# so data.startswith(BOM_UTF16_LE) would be true for UTF32_LE data +BOMS: List[Tuple[bytes, str]] = [ + (codecs.BOM_UTF8, "utf-8"), + (codecs.BOM_UTF32, "utf-32"), + (codecs.BOM_UTF32_BE, "utf-32-be"), + (codecs.BOM_UTF32_LE, "utf-32-le"), + (codecs.BOM_UTF16, "utf-16"), + (codecs.BOM_UTF16_BE, "utf-16-be"), + (codecs.BOM_UTF16_LE, "utf-16-le"), +] + +PEP263_ENCODING_RE = re.compile(rb"coding[:=]\s*([-\w.]+)") +DEFAULT_ENCODING = "utf-8" + +logger = logging.getLogger(__name__) + + +@dataclass(frozen=True) +class ParsedRequirement: + # TODO: replace this with slots=True when dropping Python 3.9 support. + __slots__ = ( + "requirement", + "is_editable", + "comes_from", + "constraint", + "options", + "line_source", + ) + + requirement: str + is_editable: bool + comes_from: str + constraint: bool + options: Optional[Dict[str, Any]] + line_source: Optional[str] + + +@dataclass(frozen=True) +class ParsedLine: + __slots__ = ("filename", "lineno", "args", "opts", "constraint") + + filename: str + lineno: int + args: str + opts: Values + constraint: bool + + @property + def is_editable(self) -> bool: + return bool(self.opts.editables) + + @property + def requirement(self) -> Optional[str]: + if self.args: + return self.args + elif self.is_editable: + # We don't support multiple -e on one line + return self.opts.editables[0] + return None + + +def parse_requirements( + filename: str, + session: "PipSession", + finder: Optional["PackageFinder"] = None, + options: Optional[optparse.Values] = None, + constraint: bool = False, +) -> Generator[ParsedRequirement, None, None]: + """Parse a requirements file and yield ParsedRequirement instances. + + :param filename: Path or url of requirements file. + :param session: PipSession instance. + :param finder: Instance of pip.index.PackageFinder. + :param options: cli options. + :param constraint: If true, parsing a constraint file rather than + requirements file. + """ + line_parser = get_line_parser(finder) + parser = RequirementsFileParser(session, line_parser) + + for parsed_line in parser.parse(filename, constraint): + parsed_req = handle_line( + parsed_line, options=options, finder=finder, session=session + ) + if parsed_req is not None: + yield parsed_req + + +def preprocess(content: str) -> ReqFileLines: + """Split, filter, and join lines, and return a line iterator + + :param content: the content of the requirements file + """ + lines_enum: ReqFileLines = enumerate(content.splitlines(), start=1) + lines_enum = join_lines(lines_enum) + lines_enum = ignore_comments(lines_enum) + lines_enum = expand_env_variables(lines_enum) + return lines_enum + + +def handle_requirement_line( + line: ParsedLine, + options: Optional[optparse.Values] = None, +) -> ParsedRequirement: + # preserve for the nested code path + line_comes_from = "{} {} (line {})".format( + "-c" if line.constraint else "-r", + line.filename, + line.lineno, + ) + + assert line.requirement is not None + + # get the options that apply to requirements + if line.is_editable: + supported_dest = SUPPORTED_OPTIONS_EDITABLE_REQ_DEST + else: + supported_dest = SUPPORTED_OPTIONS_REQ_DEST + req_options = {} + for dest in supported_dest: + if dest in line.opts.__dict__ and line.opts.__dict__[dest]: + req_options[dest] = line.opts.__dict__[dest] + + line_source = f"line {line.lineno} of {line.filename}" + return ParsedRequirement( + requirement=line.requirement, + is_editable=line.is_editable, + comes_from=line_comes_from, + constraint=line.constraint, + options=req_options, + line_source=line_source, + ) + + +def handle_option_line( + opts: Values, + filename: str, + lineno: int, + finder: Optional["PackageFinder"] = None, + options: Optional[optparse.Values] = None, + session: Optional["PipSession"] = None, +) -> None: + if opts.hashes: + logger.warning( + "%s line %s has --hash but no requirement, and will be ignored.", + filename, + lineno, + ) + + if options: + # percolate options upward + if opts.require_hashes: + options.require_hashes = opts.require_hashes + if opts.features_enabled: + options.features_enabled.extend( + f for f in opts.features_enabled if f not in options.features_enabled + ) + + # set finder options + if finder: + find_links = finder.find_links + index_urls = finder.index_urls + no_index = finder.search_scope.no_index + if opts.no_index is True: + no_index = True + index_urls = [] + if opts.index_url and not no_index: + index_urls = [opts.index_url] + if opts.extra_index_urls and not no_index: + index_urls.extend(opts.extra_index_urls) + if opts.find_links: + # FIXME: it would be nice to keep track of the source + # of the find_links: support a find-links local path + # relative to a requirements file. + value = opts.find_links[0] + req_dir = os.path.dirname(os.path.abspath(filename)) + relative_to_reqs_file = os.path.join(req_dir, value) + if os.path.exists(relative_to_reqs_file): + value = relative_to_reqs_file + find_links.append(value) + + if session: + # We need to update the auth urls in session + session.update_index_urls(index_urls) + + search_scope = SearchScope( + find_links=find_links, + index_urls=index_urls, + no_index=no_index, + ) + finder.search_scope = search_scope + + if opts.pre: + finder.set_allow_all_prereleases() + + if opts.prefer_binary: + finder.set_prefer_binary() + + if session: + for host in opts.trusted_hosts or []: + source = f"line {lineno} of {filename}" + session.add_trusted_host(host, source=source) + + +def handle_line( + line: ParsedLine, + options: Optional[optparse.Values] = None, + finder: Optional["PackageFinder"] = None, + session: Optional["PipSession"] = None, +) -> Optional[ParsedRequirement]: + """Handle a single parsed requirements line; This can result in + creating/yielding requirements, or updating the finder. + + :param line: The parsed line to be processed. + :param options: CLI options. + :param finder: The finder - updated by non-requirement lines. + :param session: The session - updated by non-requirement lines. + + Returns a ParsedRequirement object if the line is a requirement line, + otherwise returns None. + + For lines that contain requirements, the only options that have an effect + are from SUPPORTED_OPTIONS_REQ, and they are scoped to the + requirement. Other options from SUPPORTED_OPTIONS may be present, but are + ignored. + + For lines that do not contain requirements, the only options that have an + effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may + be present, but are ignored. These lines may contain multiple options + (although our docs imply only one is supported), and all our parsed and + affect the finder. + """ + + if line.requirement is not None: + parsed_req = handle_requirement_line(line, options) + return parsed_req + else: + handle_option_line( + line.opts, + line.filename, + line.lineno, + finder, + options, + session, + ) + return None + + +class RequirementsFileParser: + def __init__( + self, + session: "PipSession", + line_parser: LineParser, + ) -> None: + self._session = session + self._line_parser = line_parser + + def parse( + self, filename: str, constraint: bool + ) -> Generator[ParsedLine, None, None]: + """Parse a given file, yielding parsed lines.""" + yield from self._parse_and_recurse( + filename, constraint, [{os.path.abspath(filename): None}] + ) + + def _parse_and_recurse( + self, + filename: str, + constraint: bool, + parsed_files_stack: List[Dict[str, Optional[str]]], + ) -> Generator[ParsedLine, None, None]: + for line in self._parse_file(filename, constraint): + if line.requirement is None and ( + line.opts.requirements or line.opts.constraints + ): + # parse a nested requirements file + if line.opts.requirements: + req_path = line.opts.requirements[0] + nested_constraint = False + else: + req_path = line.opts.constraints[0] + nested_constraint = True + + # original file is over http + if SCHEME_RE.search(filename): + # do a url join so relative paths work + req_path = urllib.parse.urljoin(filename, req_path) + # original file and nested file are paths + elif not SCHEME_RE.search(req_path): + # do a join so relative paths work + # and then abspath so that we can identify recursive references + req_path = os.path.abspath( + os.path.join( + os.path.dirname(filename), + req_path, + ) + ) + parsed_files = parsed_files_stack[0] + if req_path in parsed_files: + initial_file = parsed_files[req_path] + tail = ( + f" and again in {initial_file}" + if initial_file is not None + else "" + ) + raise RequirementsFileParseError( + f"{req_path} recursively references itself in {filename}{tail}" + ) + # Keeping a track where was each file first included in + new_parsed_files = parsed_files.copy() + new_parsed_files[req_path] = filename + yield from self._parse_and_recurse( + req_path, nested_constraint, [new_parsed_files, *parsed_files_stack] + ) + else: + yield line + + def _parse_file( + self, filename: str, constraint: bool + ) -> Generator[ParsedLine, None, None]: + _, content = get_file_content(filename, self._session) + + lines_enum = preprocess(content) + + for line_number, line in lines_enum: + try: + args_str, opts = self._line_parser(line) + except OptionParsingError as e: + # add offending line + msg = f"Invalid requirement: {line}\n{e.msg}" + raise RequirementsFileParseError(msg) + + yield ParsedLine( + filename, + line_number, + args_str, + opts, + constraint, + ) + + +def get_line_parser(finder: Optional["PackageFinder"]) -> LineParser: + def parse_line(line: str) -> Tuple[str, Values]: + # Build new parser for each line since it accumulates appendable + # options. + parser = build_parser() + defaults = parser.get_default_values() + defaults.index_url = None + if finder: + defaults.format_control = finder.format_control + + args_str, options_str = break_args_options(line) + + try: + options = shlex.split(options_str) + except ValueError as e: + raise OptionParsingError(f"Could not split options: {options_str}") from e + + opts, _ = parser.parse_args(options, defaults) + + return args_str, opts + + return parse_line + + +def break_args_options(line: str) -> Tuple[str, str]: + """Break up the line into an args and options string. We only want to shlex + (and then optparse) the options, not the args. args can contain markers + which are corrupted by shlex. + """ + tokens = line.split(" ") + args = [] + options = tokens[:] + for token in tokens: + if token.startswith("-") or token.startswith("--"): + break + else: + args.append(token) + options.pop(0) + return " ".join(args), " ".join(options) + + +class OptionParsingError(Exception): + def __init__(self, msg: str) -> None: + self.msg = msg + + +def build_parser() -> optparse.OptionParser: + """ + Return a parser for parsing requirement lines + """ + parser = optparse.OptionParser(add_help_option=False) + + option_factories = SUPPORTED_OPTIONS + SUPPORTED_OPTIONS_REQ + for option_factory in option_factories: + option = option_factory() + parser.add_option(option) + + # By default optparse sys.exits on parsing errors. We want to wrap + # that in our own exception. + def parser_exit(self: Any, msg: str) -> "NoReturn": + raise OptionParsingError(msg) + + # NOTE: mypy disallows assigning to a method + # https://github.com/python/mypy/issues/2427 + parser.exit = parser_exit # type: ignore + + return parser + + +def join_lines(lines_enum: ReqFileLines) -> ReqFileLines: + """Joins a line ending in '\' with the previous line (except when following + comments). The joined line takes on the index of the first line. + """ + primary_line_number = None + new_line: List[str] = [] + for line_number, line in lines_enum: + if not line.endswith("\\") or COMMENT_RE.match(line): + if COMMENT_RE.match(line): + # this ensures comments are always matched later + line = " " + line + if new_line: + new_line.append(line) + assert primary_line_number is not None + yield primary_line_number, "".join(new_line) + new_line = [] + else: + yield line_number, line + else: + if not new_line: + primary_line_number = line_number + new_line.append(line.strip("\\")) + + # last line contains \ + if new_line: + assert primary_line_number is not None + yield primary_line_number, "".join(new_line) + + # TODO: handle space after '\'. + + +def ignore_comments(lines_enum: ReqFileLines) -> ReqFileLines: + """ + Strips comments and filter empty lines. + """ + for line_number, line in lines_enum: + line = COMMENT_RE.sub("", line) + line = line.strip() + if line: + yield line_number, line + + +def expand_env_variables(lines_enum: ReqFileLines) -> ReqFileLines: + """Replace all environment variables that can be retrieved via `os.getenv`. + + The only allowed format for environment variables defined in the + requirement file is `${MY_VARIABLE_1}` to ensure two things: + + 1. Strings that contain a `$` aren't accidentally (partially) expanded. + 2. Ensure consistency across platforms for requirement files. + + These points are the result of a discussion on the `github pull + request #3514 <https://github.com/pypa/pip/pull/3514>`_. + + Valid characters in variable names follow the `POSIX standard + <http://pubs.opengroup.org/onlinepubs/9699919799/>`_ and are limited + to uppercase letter, digits and the `_` (underscore). + """ + for line_number, line in lines_enum: + for env_var, var_name in ENV_VAR_RE.findall(line): + value = os.getenv(var_name) + if not value: + continue + + line = line.replace(env_var, value) + + yield line_number, line + + +def get_file_content(url: str, session: "PipSession") -> Tuple[str, str]: + """Gets the content of a file; it may be a filename, file: URL, or + http: URL. Returns (location, content). Content is unicode. + Respects # -*- coding: declarations on the retrieved files. + + :param url: File path or url. + :param session: PipSession instance. + """ + scheme = urllib.parse.urlsplit(url).scheme + # Pip has special support for file:// URLs (LocalFSAdapter). + if scheme in ["http", "https", "file"]: + # Delay importing heavy network modules until absolutely necessary. + from pip._internal.network.utils import raise_for_status + + resp = session.get(url) + raise_for_status(resp) + return resp.url, resp.text + + # Assume this is a bare path. + try: + with open(url, "rb") as f: + raw_content = f.read() + except OSError as exc: + raise InstallationError(f"Could not open requirements file: {exc}") + + content = _decode_req_file(raw_content, url) + + return url, content + + +def _decode_req_file(data: bytes, url: str) -> str: + for bom, encoding in BOMS: + if data.startswith(bom): + return data[len(bom) :].decode(encoding) + + for line in data.split(b"\n")[:2]: + if line[0:1] == b"#": + result = PEP263_ENCODING_RE.search(line) + if result is not None: + encoding = result.groups()[0].decode("ascii") + return data.decode(encoding) + + try: + return data.decode(DEFAULT_ENCODING) + except UnicodeDecodeError: + locale_encoding = locale.getpreferredencoding(False) or sys.getdefaultencoding() + logging.warning( + "unable to decode data from %s with default encoding %s, " + "falling back to encoding from locale: %s. " + "If this is intentional you should specify the encoding with a " + "PEP-263 style comment, e.g. '# -*- coding: %s -*-'", + url, + DEFAULT_ENCODING, + locale_encoding, + locale_encoding, + ) + return data.decode(locale_encoding) |