mirror of https://github.com/pypa/pip
666 lines
24 KiB
Python
666 lines
24 KiB
Python
"""Support for installing and building the "wheel" binary package format.
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"""
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# The following comment should be removed at some point in the future.
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# mypy: strict-optional=False
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from __future__ import absolute_import
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import collections
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import compileall
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import csv
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import logging
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import os.path
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import re
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import shutil
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import stat
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import sys
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import warnings
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from base64 import urlsafe_b64encode
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from email.parser import Parser
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from pip._vendor import pkg_resources
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from pip._vendor.distlib.scripts import ScriptMaker
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from pip._vendor.distlib.util import get_export_entry
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from pip._vendor.packaging.utils import canonicalize_name
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from pip._vendor.six import StringIO
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from pip._internal.exceptions import InstallationError, UnsupportedWheel
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from pip._internal.locations import get_major_minor_version
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from pip._internal.utils.misc import captured_stdout, ensure_dir, hash_file
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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from typing import (
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Dict, List, Optional, Sequence, Tuple, IO, Text, Any,
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Iterable, Callable, Set,
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)
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from pip._internal.models.scheme import Scheme
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InstalledCSVRow = Tuple[str, ...]
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VERSION_COMPATIBLE = (1, 0)
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logger = logging.getLogger(__name__)
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def normpath(src, p):
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# type: (str, str) -> str
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return os.path.relpath(src, p).replace(os.path.sep, '/')
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def rehash(path, blocksize=1 << 20):
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# type: (str, int) -> Tuple[str, str]
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"""Return (encoded_digest, length) for path using hashlib.sha256()"""
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h, length = hash_file(path, blocksize)
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digest = 'sha256=' + urlsafe_b64encode(
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h.digest()
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).decode('latin1').rstrip('=')
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# unicode/str python2 issues
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return (digest, str(length)) # type: ignore
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def open_for_csv(name, mode):
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# type: (str, Text) -> IO[Any]
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if sys.version_info[0] < 3:
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nl = {} # type: Dict[str, Any]
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bin = 'b'
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else:
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nl = {'newline': ''} # type: Dict[str, Any]
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bin = ''
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return open(name, mode + bin, **nl)
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def fix_script(path):
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# type: (str) -> Optional[bool]
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"""Replace #!python with #!/path/to/python
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Return True if file was changed.
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"""
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# XXX RECORD hashes will need to be updated
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if os.path.isfile(path):
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with open(path, 'rb') as script:
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firstline = script.readline()
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if not firstline.startswith(b'#!python'):
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return False
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exename = sys.executable.encode(sys.getfilesystemencoding())
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firstline = b'#!' + exename + os.linesep.encode("ascii")
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rest = script.read()
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with open(path, 'wb') as script:
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script.write(firstline)
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script.write(rest)
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return True
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return None
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dist_info_re = re.compile(r"""^(?P<namever>(?P<name>.+?)(-(?P<ver>.+?))?)
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\.dist-info$""", re.VERBOSE)
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def root_is_purelib(name, wheeldir):
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# type: (str, str) -> bool
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"""True if the extracted wheel in wheeldir should go into purelib."""
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name_folded = name.replace("-", "_")
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for item in os.listdir(wheeldir):
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match = dist_info_re.match(item)
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if match and match.group('name') == name_folded:
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with open(os.path.join(wheeldir, item, 'WHEEL')) as wheel:
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for line in wheel:
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line = line.lower().rstrip()
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if line == "root-is-purelib: true":
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return True
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return False
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def get_entrypoints(filename):
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# type: (str) -> Tuple[Dict[str, str], Dict[str, str]]
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if not os.path.exists(filename):
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return {}, {}
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# This is done because you can pass a string to entry_points wrappers which
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# means that they may or may not be valid INI files. The attempt here is to
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# strip leading and trailing whitespace in order to make them valid INI
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# files.
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with open(filename) as fp:
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data = StringIO()
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for line in fp:
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data.write(line.strip())
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data.write("\n")
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data.seek(0)
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# get the entry points and then the script names
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entry_points = pkg_resources.EntryPoint.parse_map(data)
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console = entry_points.get('console_scripts', {})
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gui = entry_points.get('gui_scripts', {})
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def _split_ep(s):
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# type: (pkg_resources.EntryPoint) -> Tuple[str, str]
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"""get the string representation of EntryPoint,
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remove space and split on '='
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"""
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split_parts = str(s).replace(" ", "").split("=")
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return split_parts[0], split_parts[1]
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# convert the EntryPoint objects into strings with module:function
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console = dict(_split_ep(v) for v in console.values())
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gui = dict(_split_ep(v) for v in gui.values())
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return console, gui
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def message_about_scripts_not_on_PATH(scripts):
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# type: (Sequence[str]) -> Optional[str]
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"""Determine if any scripts are not on PATH and format a warning.
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Returns a warning message if one or more scripts are not on PATH,
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otherwise None.
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"""
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if not scripts:
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return None
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# Group scripts by the path they were installed in
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grouped_by_dir = collections.defaultdict(set) # type: Dict[str, Set[str]]
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for destfile in scripts:
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parent_dir = os.path.dirname(destfile)
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script_name = os.path.basename(destfile)
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grouped_by_dir[parent_dir].add(script_name)
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# We don't want to warn for directories that are on PATH.
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not_warn_dirs = [
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os.path.normcase(i).rstrip(os.sep) for i in
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os.environ.get("PATH", "").split(os.pathsep)
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]
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# If an executable sits with sys.executable, we don't warn for it.
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# This covers the case of venv invocations without activating the venv.
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not_warn_dirs.append(os.path.normcase(os.path.dirname(sys.executable)))
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warn_for = {
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parent_dir: scripts for parent_dir, scripts in grouped_by_dir.items()
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if os.path.normcase(parent_dir) not in not_warn_dirs
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} # type: Dict[str, Set[str]]
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if not warn_for:
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return None
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# Format a message
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msg_lines = []
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for parent_dir, dir_scripts in warn_for.items():
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sorted_scripts = sorted(dir_scripts) # type: List[str]
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if len(sorted_scripts) == 1:
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start_text = "script {} is".format(sorted_scripts[0])
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else:
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start_text = "scripts {} are".format(
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", ".join(sorted_scripts[:-1]) + " and " + sorted_scripts[-1]
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)
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msg_lines.append(
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"The {} installed in '{}' which is not on PATH."
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.format(start_text, parent_dir)
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)
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last_line_fmt = (
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"Consider adding {} to PATH or, if you prefer "
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"to suppress this warning, use --no-warn-script-location."
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)
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if len(msg_lines) == 1:
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msg_lines.append(last_line_fmt.format("this directory"))
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else:
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msg_lines.append(last_line_fmt.format("these directories"))
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# Add a note if any directory starts with ~
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warn_for_tilde = any(
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i[0] == "~" for i in os.environ.get("PATH", "").split(os.pathsep) if i
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)
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if warn_for_tilde:
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tilde_warning_msg = (
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"NOTE: The current PATH contains path(s) starting with `~`, "
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"which may not be expanded by all applications."
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)
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msg_lines.append(tilde_warning_msg)
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# Returns the formatted multiline message
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return "\n".join(msg_lines)
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def sorted_outrows(outrows):
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# type: (Iterable[InstalledCSVRow]) -> List[InstalledCSVRow]
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"""Return the given rows of a RECORD file in sorted order.
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Each row is a 3-tuple (path, hash, size) and corresponds to a record of
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a RECORD file (see PEP 376 and PEP 427 for details). For the rows
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passed to this function, the size can be an integer as an int or string,
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or the empty string.
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"""
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# Normally, there should only be one row per path, in which case the
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# second and third elements don't come into play when sorting.
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# However, in cases in the wild where a path might happen to occur twice,
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# we don't want the sort operation to trigger an error (but still want
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# determinism). Since the third element can be an int or string, we
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# coerce each element to a string to avoid a TypeError in this case.
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# For additional background, see--
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# https://github.com/pypa/pip/issues/5868
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return sorted(outrows, key=lambda row: tuple(str(x) for x in row))
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def get_csv_rows_for_installed(
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old_csv_rows, # type: Iterable[List[str]]
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installed, # type: Dict[str, str]
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changed, # type: Set[str]
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generated, # type: List[str]
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lib_dir, # type: str
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):
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# type: (...) -> List[InstalledCSVRow]
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"""
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:param installed: A map from archive RECORD path to installation RECORD
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path.
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"""
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installed_rows = [] # type: List[InstalledCSVRow]
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for row in old_csv_rows:
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if len(row) > 3:
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logger.warning(
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'RECORD line has more than three elements: {}'.format(row)
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)
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# Make a copy because we are mutating the row.
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row = list(row)
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old_path = row[0]
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new_path = installed.pop(old_path, old_path)
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row[0] = new_path
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if new_path in changed:
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digest, length = rehash(new_path)
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row[1] = digest
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row[2] = length
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installed_rows.append(tuple(row))
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for f in generated:
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digest, length = rehash(f)
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installed_rows.append((normpath(f, lib_dir), digest, str(length)))
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for f in installed:
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installed_rows.append((installed[f], '', ''))
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return installed_rows
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class MissingCallableSuffix(Exception):
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pass
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def _raise_for_invalid_entrypoint(specification):
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# type: (str) -> None
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entry = get_export_entry(specification)
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if entry is not None and entry.suffix is None:
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raise MissingCallableSuffix(str(entry))
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class PipScriptMaker(ScriptMaker):
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def make(self, specification, options=None):
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# type: (str, Dict[str, Any]) -> List[str]
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_raise_for_invalid_entrypoint(specification)
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return super(PipScriptMaker, self).make(specification, options)
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def install_unpacked_wheel(
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name, # type: str
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wheeldir, # type: str
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scheme, # type: Scheme
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req_description, # type: str
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pycompile=True, # type: bool
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warn_script_location=True # type: bool
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):
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# type: (...) -> None
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"""Install a wheel.
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:param name: Name of the project to install
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:param wheeldir: Base directory of the unpacked wheel
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:param scheme: Distutils scheme dictating the install directories
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:param req_description: String used in place of the requirement, for
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logging
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:param pycompile: Whether to byte-compile installed Python files
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:param warn_script_location: Whether to check that scripts are installed
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into a directory on PATH
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:raises UnsupportedWheel: when the directory holds an unpacked wheel with
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incompatible Wheel-Version
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"""
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# TODO: Investigate and break this up.
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# TODO: Look into moving this into a dedicated class for representing an
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# installation.
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version = wheel_version(wheeldir)
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check_compatibility(version, name)
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if root_is_purelib(name, wheeldir):
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lib_dir = scheme.purelib
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else:
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lib_dir = scheme.platlib
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info_dir = [] # type: List[str]
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data_dirs = []
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source = wheeldir.rstrip(os.path.sep) + os.path.sep
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# Record details of the files moved
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# installed = files copied from the wheel to the destination
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# changed = files changed while installing (scripts #! line typically)
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# generated = files newly generated during the install (script wrappers)
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installed = {} # type: Dict[str, str]
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changed = set()
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generated = [] # type: List[str]
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# Compile all of the pyc files that we're going to be installing
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if pycompile:
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with captured_stdout() as stdout:
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with warnings.catch_warnings():
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warnings.filterwarnings('ignore')
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compileall.compile_dir(source, force=True, quiet=True)
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logger.debug(stdout.getvalue())
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def record_installed(srcfile, destfile, modified=False):
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# type: (str, str, bool) -> None
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"""Map archive RECORD paths to installation RECORD paths."""
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oldpath = normpath(srcfile, wheeldir)
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newpath = normpath(destfile, lib_dir)
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installed[oldpath] = newpath
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if modified:
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changed.add(destfile)
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def clobber(
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source, # type: str
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dest, # type: str
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is_base, # type: bool
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fixer=None, # type: Optional[Callable[[str], Any]]
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filter=None # type: Optional[Callable[[str], bool]]
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):
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# type: (...) -> None
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ensure_dir(dest) # common for the 'include' path
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for dir, subdirs, files in os.walk(source):
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basedir = dir[len(source):].lstrip(os.path.sep)
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destdir = os.path.join(dest, basedir)
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if is_base and basedir.split(os.path.sep, 1)[0].endswith('.data'):
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continue
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for s in subdirs:
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destsubdir = os.path.join(dest, basedir, s)
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if is_base and basedir == '' and destsubdir.endswith('.data'):
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data_dirs.append(s)
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continue
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elif (
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is_base and
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s.endswith('.dist-info') and
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canonicalize_name(s).startswith(canonicalize_name(name))
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):
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assert not info_dir, (
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'Multiple .dist-info directories: {}, '.format(
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destsubdir
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) + ', '.join(info_dir)
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)
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info_dir.append(destsubdir)
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for f in files:
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# Skip unwanted files
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if filter and filter(f):
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continue
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srcfile = os.path.join(dir, f)
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destfile = os.path.join(dest, basedir, f)
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# directory creation is lazy and after the file filtering above
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# to ensure we don't install empty dirs; empty dirs can't be
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# uninstalled.
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ensure_dir(destdir)
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# copyfile (called below) truncates the destination if it
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# exists and then writes the new contents. This is fine in most
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# cases, but can cause a segfault if pip has loaded a shared
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# object (e.g. from pyopenssl through its vendored urllib3)
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# Since the shared object is mmap'd an attempt to call a
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# symbol in it will then cause a segfault. Unlinking the file
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# allows writing of new contents while allowing the process to
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# continue to use the old copy.
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if os.path.exists(destfile):
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os.unlink(destfile)
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# We use copyfile (not move, copy, or copy2) to be extra sure
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# that we are not moving directories over (copyfile fails for
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# directories) as well as to ensure that we are not copying
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# over any metadata because we want more control over what
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# metadata we actually copy over.
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shutil.copyfile(srcfile, destfile)
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# Copy over the metadata for the file, currently this only
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# includes the atime and mtime.
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st = os.stat(srcfile)
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if hasattr(os, "utime"):
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os.utime(destfile, (st.st_atime, st.st_mtime))
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# If our file is executable, then make our destination file
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# executable.
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if os.access(srcfile, os.X_OK):
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st = os.stat(srcfile)
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permissions = (
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st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
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)
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os.chmod(destfile, permissions)
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changed = False
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if fixer:
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changed = fixer(destfile)
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record_installed(srcfile, destfile, changed)
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clobber(source, lib_dir, True)
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assert info_dir, "{} .dist-info directory not found".format(
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req_description
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)
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# Get the defined entry points
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ep_file = os.path.join(info_dir[0], 'entry_points.txt')
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console, gui = get_entrypoints(ep_file)
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def is_entrypoint_wrapper(name):
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# type: (str) -> bool
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# EP, EP.exe and EP-script.py are scripts generated for
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# entry point EP by setuptools
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if name.lower().endswith('.exe'):
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matchname = name[:-4]
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elif name.lower().endswith('-script.py'):
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matchname = name[:-10]
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elif name.lower().endswith(".pya"):
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matchname = name[:-4]
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else:
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matchname = name
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# Ignore setuptools-generated scripts
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return (matchname in console or matchname in gui)
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for datadir in data_dirs:
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fixer = None
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filter = None
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for subdir in os.listdir(os.path.join(wheeldir, datadir)):
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fixer = None
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if subdir == 'scripts':
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fixer = fix_script
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filter = is_entrypoint_wrapper
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source = os.path.join(wheeldir, datadir, subdir)
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dest = getattr(scheme, subdir)
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clobber(source, dest, False, fixer=fixer, filter=filter)
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maker = PipScriptMaker(None, scheme.scripts)
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# Ensure old scripts are overwritten.
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# See https://github.com/pypa/pip/issues/1800
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maker.clobber = True
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# Ensure we don't generate any variants for scripts because this is almost
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# never what somebody wants.
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# See https://bitbucket.org/pypa/distlib/issue/35/
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maker.variants = {''}
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# This is required because otherwise distlib creates scripts that are not
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# executable.
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# See https://bitbucket.org/pypa/distlib/issue/32/
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maker.set_mode = True
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scripts_to_generate = []
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# Special case pip and setuptools to generate versioned wrappers
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#
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# The issue is that some projects (specifically, pip and setuptools) use
|
|
# code in setup.py to create "versioned" entry points - pip2.7 on Python
|
|
# 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
|
|
# the wheel metadata at build time, and so if the wheel is installed with
|
|
# a *different* version of Python the entry points will be wrong. The
|
|
# correct fix for this is to enhance the metadata to be able to describe
|
|
# such versioned entry points, but that won't happen till Metadata 2.0 is
|
|
# available.
|
|
# In the meantime, projects using versioned entry points will either have
|
|
# incorrect versioned entry points, or they will not be able to distribute
|
|
# "universal" wheels (i.e., they will need a wheel per Python version).
|
|
#
|
|
# Because setuptools and pip are bundled with _ensurepip and virtualenv,
|
|
# we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
|
|
# override the versioned entry points in the wheel and generate the
|
|
# correct ones. This code is purely a short-term measure until Metadata 2.0
|
|
# is available.
|
|
#
|
|
# To add the level of hack in this section of code, in order to support
|
|
# ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
|
|
# variable which will control which version scripts get installed.
|
|
#
|
|
# ENSUREPIP_OPTIONS=altinstall
|
|
# - Only pipX.Y and easy_install-X.Y will be generated and installed
|
|
# ENSUREPIP_OPTIONS=install
|
|
# - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
|
|
# that this option is technically if ENSUREPIP_OPTIONS is set and is
|
|
# not altinstall
|
|
# DEFAULT
|
|
# - The default behavior is to install pip, pipX, pipX.Y, easy_install
|
|
# and easy_install-X.Y.
|
|
pip_script = console.pop('pip', None)
|
|
if pip_script:
|
|
if "ENSUREPIP_OPTIONS" not in os.environ:
|
|
scripts_to_generate.append('pip = ' + pip_script)
|
|
|
|
if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
|
|
scripts_to_generate.append(
|
|
'pip%s = %s' % (sys.version_info[0], pip_script)
|
|
)
|
|
|
|
scripts_to_generate.append(
|
|
'pip%s = %s' % (get_major_minor_version(), pip_script)
|
|
)
|
|
# Delete any other versioned pip entry points
|
|
pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)]
|
|
for k in pip_ep:
|
|
del console[k]
|
|
easy_install_script = console.pop('easy_install', None)
|
|
if easy_install_script:
|
|
if "ENSUREPIP_OPTIONS" not in os.environ:
|
|
scripts_to_generate.append(
|
|
'easy_install = ' + easy_install_script
|
|
)
|
|
|
|
scripts_to_generate.append(
|
|
'easy_install-%s = %s' % (
|
|
get_major_minor_version(), easy_install_script
|
|
)
|
|
)
|
|
# Delete any other versioned easy_install entry points
|
|
easy_install_ep = [
|
|
k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)
|
|
]
|
|
for k in easy_install_ep:
|
|
del console[k]
|
|
|
|
# Generate the console and GUI entry points specified in the wheel
|
|
scripts_to_generate.extend(
|
|
'%s = %s' % kv for kv in console.items()
|
|
)
|
|
|
|
gui_scripts_to_generate = [
|
|
'%s = %s' % kv for kv in gui.items()
|
|
]
|
|
|
|
generated_console_scripts = [] # type: List[str]
|
|
|
|
try:
|
|
generated_console_scripts = maker.make_multiple(scripts_to_generate)
|
|
generated.extend(generated_console_scripts)
|
|
|
|
generated.extend(
|
|
maker.make_multiple(gui_scripts_to_generate, {'gui': True})
|
|
)
|
|
except MissingCallableSuffix as e:
|
|
entry = e.args[0]
|
|
raise InstallationError(
|
|
"Invalid script entry point: {} for req: {} - A callable "
|
|
"suffix is required. Cf https://packaging.python.org/"
|
|
"specifications/entry-points/#use-for-scripts for more "
|
|
"information.".format(entry, req_description)
|
|
)
|
|
|
|
if warn_script_location:
|
|
msg = message_about_scripts_not_on_PATH(generated_console_scripts)
|
|
if msg is not None:
|
|
logger.warning(msg)
|
|
|
|
# Record pip as the installer
|
|
installer = os.path.join(info_dir[0], 'INSTALLER')
|
|
temp_installer = os.path.join(info_dir[0], 'INSTALLER.pip')
|
|
with open(temp_installer, 'wb') as installer_file:
|
|
installer_file.write(b'pip\n')
|
|
shutil.move(temp_installer, installer)
|
|
generated.append(installer)
|
|
|
|
# Record details of all files installed
|
|
record = os.path.join(info_dir[0], 'RECORD')
|
|
temp_record = os.path.join(info_dir[0], 'RECORD.pip')
|
|
with open_for_csv(record, 'r') as record_in:
|
|
with open_for_csv(temp_record, 'w+') as record_out:
|
|
reader = csv.reader(record_in)
|
|
outrows = get_csv_rows_for_installed(
|
|
reader, installed=installed, changed=changed,
|
|
generated=generated, lib_dir=lib_dir,
|
|
)
|
|
writer = csv.writer(record_out)
|
|
# Sort to simplify testing.
|
|
for row in sorted_outrows(outrows):
|
|
writer.writerow(row)
|
|
shutil.move(temp_record, record)
|
|
|
|
|
|
def wheel_version(source_dir):
|
|
# type: (Optional[str]) -> Optional[Tuple[int, ...]]
|
|
"""Return the Wheel-Version of an extracted wheel, if possible.
|
|
Otherwise, return None if we couldn't parse / extract it.
|
|
"""
|
|
try:
|
|
dist = [d for d in pkg_resources.find_on_path(None, source_dir)][0]
|
|
|
|
wheel_data = dist.get_metadata('WHEEL')
|
|
wheel_data = Parser().parsestr(wheel_data)
|
|
|
|
version = wheel_data['Wheel-Version'].strip()
|
|
version = tuple(map(int, version.split('.')))
|
|
return version
|
|
except Exception:
|
|
return None
|
|
|
|
|
|
def check_compatibility(version, name):
|
|
# type: (Optional[Tuple[int, ...]], str) -> None
|
|
"""Raises errors or warns if called with an incompatible Wheel-Version.
|
|
|
|
Pip should refuse to install a Wheel-Version that's a major series
|
|
ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when
|
|
installing a version only minor version ahead (e.g 1.2 > 1.1).
|
|
|
|
version: a 2-tuple representing a Wheel-Version (Major, Minor)
|
|
name: name of wheel or package to raise exception about
|
|
|
|
:raises UnsupportedWheel: when an incompatible Wheel-Version is given
|
|
"""
|
|
if not version:
|
|
raise UnsupportedWheel(
|
|
"%s is in an unsupported or invalid wheel" % name
|
|
)
|
|
if version[0] > VERSION_COMPATIBLE[0]:
|
|
raise UnsupportedWheel(
|
|
"%s's Wheel-Version (%s) is not compatible with this version "
|
|
"of pip" % (name, '.'.join(map(str, version)))
|
|
)
|
|
elif version > VERSION_COMPATIBLE:
|
|
logger.warning(
|
|
'Installing from a newer Wheel-Version (%s)',
|
|
'.'.join(map(str, version)),
|
|
)
|