guppy_basecaller: env/lib/python3.7/site-packages/virtualenv/discovery/py

comparison env/lib/python3.7/site-packages/virtualenv/discovery/py_info.py @ 0:26e78fe6e8c4 draft

"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"

author	shellac
date	Sat, 02 May 2020 07:14:21 -0400
parents
children

comparison

equal deleted inserted replaced

--1:000000000000
+:26e78fe6e8c4
+"""
+The PythonInfo contains information about a concrete instance of a Python interpreter
+Note: this file is also used to query target interpreters, so can only use standard library methods
+"""
+from __future__ import absolute_import, print_function
+import json
+import logging
+import os
+import platform
+import re
+import sys
+import sysconfig
+from collections import OrderedDict, namedtuple
+from distutils import dist
+from distutils.command.install import SCHEME_KEYS
+from string import digits
+VersionInfo = namedtuple("VersionInfo", ["major", "minor", "micro", "releaselevel", "serial"])
+def _get_path_extensions():
+return list(OrderedDict.fromkeys([""] + os.environ.get("PATHEXT", "").lower().split(os.pathsep)))
+EXTENSIONS = _get_path_extensions()
+_CONF_VAR_RE = re.compile(r"\{\w+\}")
+class PythonInfo(object):
+"""Contains information for a Python interpreter"""
+def __init__(self):
+def u(v):
+return v.decode("utf-8") if isinstance(v, bytes) else v
+def abs_path(v):
+return None if v is None else os.path.abspath(v)  # unroll relative elements from path (e.g. ..)
+# qualifies the python
+self.platform = u(sys.platform)
+self.implementation = u(platform.python_implementation())
+if self.implementation == "PyPy":
+self.pypy_version_info = tuple(u(i) for i in sys.pypy_version_info)
+# this is a tuple in earlier, struct later, unify to our own named tuple
+self.version_info = VersionInfo(*list(u(i) for i in sys.version_info))
+self.architecture = 64 if sys.maxsize > 2 ** 32 else 32
+self.version = u(sys.version)
+self.os = u(os.name)
+# information about the prefix - determines python home
+self.prefix = u(abs_path(getattr(sys, "prefix", None)))  # prefix we think
+self.base_prefix = u(abs_path(getattr(sys, "base_prefix", None)))  # venv
+self.real_prefix = u(abs_path(getattr(sys, "real_prefix", None)))  # old virtualenv
+# information about the exec prefix - dynamic stdlib modules
+self.base_exec_prefix = u(abs_path(getattr(sys, "base_exec_prefix", None)))
+self.exec_prefix = u(abs_path(getattr(sys, "exec_prefix", None)))
+self.executable = u(abs_path(sys.executable))  # the executable we were invoked via
+self.original_executable = u(abs_path(self.executable))  # the executable as known by the interpreter
+self.system_executable = self._fast_get_system_executable()  # the executable we are based of (if available)
+try:
+__import__("venv")
+has = True
+except ImportError:
+has = False
+self.has_venv = has
+self.path = [u(i) for i in sys.path]
+self.file_system_encoding = u(sys.getfilesystemencoding())
+self.stdout_encoding = u(getattr(sys.stdout, "encoding", None))
+self.sysconfig_paths = {u(i): u(sysconfig.get_path(i, expand=False)) for i in sysconfig.get_path_names()}
+config_var_keys = set()
+for element in self.sysconfig_paths.values():
+for k in _CONF_VAR_RE.findall(element):
+config_var_keys.add(u(k[1:-1]))
+config_var_keys.add("PYTHONFRAMEWORK")
+self.sysconfig_vars = {u(i): u(sysconfig.get_config_var(i) or "") for i in config_var_keys}
+if self.implementation == "PyPy" and sys.version_info.major == 2:
+self.sysconfig_vars[u"implementation_lower"] = u"python"
+self.distutils_install = {u(k): u(v) for k, v in self._distutils_install().items()}
+confs = {k: (self.system_prefix if v.startswith(self.prefix) else v) for k, v in self.sysconfig_vars.items()}
+self.system_stdlib = self.sysconfig_path("stdlib", confs)
+self.system_stdlib_platform = self.sysconfig_path("platstdlib", confs)
+self.max_size = getattr(sys, "maxsize", getattr(sys, "maxint", None))
+self._creators = None
+def _fast_get_system_executable(self):
+"""Try to get the system executable by just looking at properties"""
+if self.real_prefix or (
+self.base_prefix is not None and self.base_prefix != self.prefix
+):  # if this is a virtual environment
+if self.real_prefix is None:
+base_executable = getattr(sys, "_base_executable", None)  # some platforms may set this to help us
+if base_executable is not None:  # use the saved system executable if present
+if sys.executable != base_executable:  # we know we're in a virtual environment, cannot be us
+return base_executable
+return None  # in this case we just can't tell easily without poking around FS and calling them, bail
+# if we're not in a virtual environment, this is already a system python, so return the original executable
+# note we must choose the original and not the pure executable as shim scripts might throw us off
+return self.original_executable
+@staticmethod
+def _distutils_install():
+# follow https://github.com/pypa/pip/blob/master/src/pip/_internal/locations.py#L95
+# note here we don't import Distribution directly to allow setuptools to patch it
+d = dist.Distribution({"script_args": "--no-user-cfg"})  # conf files not parsed so they do not hijack paths
+if hasattr(sys, "_framework"):
+sys._framework = None  # disable macOS static paths for framework
+i = d.get_command_obj("install", create=True)
+i.prefix = os.sep  # paths generated are relative to prefix that contains the path sep, this makes it relative
+i.finalize_options()
+result = {key: (getattr(i, "install_{}".format(key))[1:]).lstrip(os.sep) for key in SCHEME_KEYS}
+return result
+@property
+def version_str(self):
+return ".".join(str(i) for i in self.version_info[0:3])
+@property
+def version_release_str(self):
+return ".".join(str(i) for i in self.version_info[0:2])
+@property
+def python_name(self):
+version_info = self.version_info
+return "python{}.{}".format(version_info.major, version_info.minor)
+@property
+def is_old_virtualenv(self):
+return self.real_prefix is not None
+@property
+def is_venv(self):
+return self.base_prefix is not None and self.version_info.major == 3
+def sysconfig_path(self, key, config_var=None, sep=os.sep):
+pattern = self.sysconfig_paths[key]
+if config_var is None:
+config_var = self.sysconfig_vars
+else:
+base = {k: v for k, v in self.sysconfig_vars.items()}
+base.update(config_var)
+config_var = base
+return pattern.format(**config_var).replace(u"/", sep)
+def creators(self, refresh=False):
+if self._creators is None or refresh is True:
+from virtualenv.run.plugin.creators import CreatorSelector
+self._creators = CreatorSelector.for_interpreter(self)
+return self._creators
+@property
+def system_include(self):
+path = self.sysconfig_path(
+"include",
+{k: (self.system_prefix if v.startswith(self.prefix) else v) for k, v in self.sysconfig_vars.items()},
+)
+if not os.path.exists(path):  # some broken packaging don't respect the sysconfig, fallback to distutils path
+# the pattern include the distribution name too at the end, remove that via the parent call
+fallback = os.path.join(self.prefix, os.path.dirname(self.distutils_install["headers"]))
+if os.path.exists(fallback):
+path = fallback
+return path
+@property
+def system_prefix(self):
+return self.real_prefix or self.base_prefix or self.prefix
+@property
+def system_exec_prefix(self):
+return self.real_prefix or self.base_exec_prefix or self.exec_prefix
+def __unicode__(self):
+content = repr(self)
+if sys.version_info == 2:
+content = content.decode("utf-8")
+return content
+def __repr__(self):
+return "{}({!r})".format(
+self.__class__.__name__, {k: v for k, v in self.__dict__.items() if not k.startswith("_")}
+)
+def __str__(self):
+content = "{}({})".format(
+self.__class__.__name__,
+", ".join(
+"{}={}".format(k, v)
+for k, v in (
+("spec", self.spec,),
+(
+"system"
+if self.system_executable is not None and self.system_executable != self.executable
+else None,
+self.system_executable,
+),
+(
+"original"
+if (
+self.original_executable != self.system_executable
+and self.original_executable != self.executable
+)
+else None,
+self.original_executable,
+),
+("exe", self.executable),
+("platform", self.platform),
+("version", repr(self.version)),
+("encoding_fs_io", "{}-{}".format(self.file_system_encoding, self.stdout_encoding)),
+)
+if k is not None
+),
+)
+return content
+@property
+def spec(self):
+return "{}{}-{}".format(self.implementation, ".".join(str(i) for i in self.version_info), self.architecture)
+@classmethod
+def clear_cache(cls, app_data):
+# this method is not used by itself, so here and called functions can import stuff locally
+from virtualenv.discovery.cached_py_info import clear
+clear(app_data)
+cls._cache_exe_discovery.clear()
+def satisfies(self, spec, impl_must_match):
+"""check if a given specification can be satisfied by the this python interpreter instance"""
+if spec.path:
+if self.executable == os.path.abspath(spec.path):
+return True  # if the path is a our own executable path we're done
+if not spec.is_abs:
+# if path set, and is not our original executable name, this does not match
+basename = os.path.basename(self.original_executable)
+spec_path = spec.path
+if sys.platform == "win32":
+basename, suffix = os.path.splitext(basename)
+if spec_path.endswith(suffix):
+spec_path = spec_path[: -len(suffix)]
+if basename != spec_path:
+return False
+if impl_must_match:
+if spec.implementation is not None and spec.implementation.lower() != self.implementation.lower():
+return False
+if spec.architecture is not None and spec.architecture != self.architecture:
+return False
+for our, req in zip(self.version_info[0:3], (spec.major, spec.minor, spec.micro)):
+if req is not None and our is not None and our != req:
+return False
+return True
+_current_system = None
+_current = None
+@classmethod
+def current(cls, app_data=None):
+"""
+This locates the current host interpreter information. This might be different than what we run into in case
+the host python has been upgraded from underneath us.
+"""
+if cls._current is None:
+cls._current = cls.from_exe(sys.executable, app_data, raise_on_error=True, resolve_to_host=False)
+return cls._current
+@classmethod
+def current_system(cls, app_data=None):
+"""
+This locates the current host interpreter information. This might be different than what we run into in case
+the host python has been upgraded from underneath us.
+"""
+if cls._current_system is None:
+cls._current_system = cls.from_exe(sys.executable, app_data, raise_on_error=True, resolve_to_host=True)
+return cls._current_system
+def _to_json(self):
+# don't save calculated paths, as these are non primitive types
+return json.dumps(self._to_dict(), indent=2)
+def _to_dict(self):
+data = {var: (getattr(self, var) if var not in ("_creators",) else None) for var in vars(self)}
+# noinspection PyProtectedMember
+data["version_info"] = data["version_info"]._asdict()  # namedtuple to dictionary
+return data
+@classmethod
+def from_exe(cls, exe, app_data=None, raise_on_error=True, ignore_cache=False, resolve_to_host=True):
+"""Given a path to an executable get the python information"""
+# this method is not used by itself, so here and called functions can import stuff locally
+from virtualenv.discovery.cached_py_info import from_exe
+proposed = from_exe(cls, app_data, exe, raise_on_error=raise_on_error, ignore_cache=ignore_cache)
+# noinspection PyProtectedMember
+if isinstance(proposed, PythonInfo) and resolve_to_host:
+proposed = proposed._resolve_to_system(app_data, proposed)
+return proposed
+@classmethod
+def _from_json(cls, payload):
+# the dictionary unroll here is to protect against pypy bug of interpreter crashing
+raw = json.loads(payload)
+return cls._from_dict({k: v for k, v in raw.items()})
+@classmethod
+def _from_dict(cls, data):
+data["version_info"] = VersionInfo(**data["version_info"])  # restore this to a named tuple structure
+result = cls()
+result.__dict__ = {k: v for k, v in data.items()}
+return result
+@classmethod
+def _resolve_to_system(cls, app_data, target):
+start_executable = target.executable
+prefixes = OrderedDict()
+while target.system_executable is None:
+prefix = target.real_prefix or target.base_prefix or target.prefix
+if prefix in prefixes:
+if len(prefixes) == 1:
+# if we're linking back to ourselves accept ourselves with a WARNING
+logging.info("%r links back to itself via prefixes", target)
+target.system_executable = target.executable
+break
+for at, (p, t) in enumerate(prefixes.items(), start=1):
+logging.error("%d: prefix=%s, info=%r", at, p, t)
+logging.error("%d: prefix=%s, info=%r", len(prefixes) + 1, prefix, target)
+raise RuntimeError("prefixes are causing a circle {}".format("|".join(prefixes.keys())))
+prefixes[prefix] = target
+target = target.discover_exe(app_data, prefix=prefix, exact=False)
+if target.executable != target.system_executable:
+target = cls.from_exe(target.system_executable, app_data)
+target.executable = start_executable
+return target
+_cache_exe_discovery = {}
+def discover_exe(self, app_data, prefix, exact=True):
+key = prefix, exact
+if key in self._cache_exe_discovery and prefix:
+logging.debug("discover exe from cache %s - exact %s: %r", prefix, exact, self._cache_exe_discovery[key])
+return self._cache_exe_discovery[key]
+logging.debug("discover exe for %s in %s", self, prefix)
+# we don't know explicitly here, do some guess work - our executable name should tell
+possible_names = self._find_possible_exe_names()
+possible_folders = self._find_possible_folders(prefix)
+discovered = []
+for folder in possible_folders:
+for name in possible_names:
+info = self._check_exe(app_data, folder, name, exact, discovered)
+if info is not None:
+self._cache_exe_discovery[key] = info
+return info
+if exact is False and discovered:
+info = self._select_most_likely(discovered, self)
+folders = os.pathsep.join(possible_folders)
+self._cache_exe_discovery[key] = info
+logging.debug("no exact match found, chosen most similar of %s within base folders %s", info, folders)
+return info
+msg = "failed to detect {} in {}".format("|".join(possible_names), os.pathsep.join(possible_folders))
+raise RuntimeError(msg)
+def _check_exe(self, app_data, folder, name, exact, discovered):
+exe_path = os.path.join(folder, name)
+if not os.path.exists(exe_path):
+return None
+info = self.from_exe(exe_path, app_data, resolve_to_host=False, raise_on_error=False)
+if info is None:  # ignore if for some reason we can't query
+return None
+for item in ["implementation", "architecture", "version_info"]:
+found = getattr(info, item)
+searched = getattr(self, item)
+if found != searched:
+if item == "version_info":
+found, searched = ".".join(str(i) for i in found), ".".join(str(i) for i in searched)
+executable = info.executable
+logging.debug("refused interpreter %s because %s differs %s != %s", executable, item, found, searched)
+if exact is False:
+discovered.append(info)
+break
+else:
+return info
+return None
+@staticmethod
+def _select_most_likely(discovered, target):
+# no exact match found, start relaxing our requirements then to facilitate system package upgrades that
+# could cause this (when using copy strategy of the host python)
+def sort_by(info):
+# we need to setup some priority of traits, this is as follows:
+# implementation, major, minor, micro, architecture, tag, serial
+matches = [
+info.implementation == target.implementation,
+info.version_info.major == target.version_info.major,
+info.version_info.minor == target.version_info.minor,
+info.architecture == target.architecture,
+info.version_info.micro == target.version_info.micro,
+info.version_info.releaselevel == target.version_info.releaselevel,
+info.version_info.serial == target.version_info.serial,
+]
+priority = sum((1 << pos if match else 0) for pos, match in enumerate(reversed(matches)))
+return priority
+sorted_discovered = sorted(discovered, key=sort_by, reverse=True)  # sort by priority in decreasing order
+most_likely = sorted_discovered[0]
+return most_likely
+def _find_possible_folders(self, inside_folder):
+candidate_folder = OrderedDict()
+executables = OrderedDict()
+executables[os.path.realpath(self.executable)] = None
+executables[self.executable] = None
+executables[os.path.realpath(self.original_executable)] = None
+executables[self.original_executable] = None
+for exe in executables.keys():
+base = os.path.dirname(exe)
+# following path pattern of the current
+if base.startswith(self.prefix):
+relative = base[len(self.prefix) :]
+candidate_folder["{}{}".format(inside_folder, relative)] = None
+# or at root level
+candidate_folder[inside_folder] = None
+return list(i for i in candidate_folder.keys() if os.path.exists(i))
+def _find_possible_exe_names(self):
+name_candidate = OrderedDict()
+for name in self._possible_base():
+for at in (3, 2, 1, 0):
+version = ".".join(str(i) for i in self.version_info[:at])
+for arch in ["-{}".format(self.architecture), ""]:
+for ext in EXTENSIONS:
+candidate = "{}{}{}{}".format(name, version, arch, ext)
+name_candidate[candidate] = None
+return list(name_candidate.keys())
+def _possible_base(self):
+possible_base = OrderedDict()
+basename = os.path.splitext(os.path.basename(self.executable))[0].rstrip(digits)
+possible_base[basename] = None
+possible_base[self.implementation] = None
+# python is always the final option as in practice is used by multiple implementation as exe name
+if "python" in possible_base:
+del possible_base["python"]
+possible_base["python"] = None
+for base in possible_base:
+lower = base.lower()
+yield lower
+from virtualenv.info import fs_is_case_sensitive
+if fs_is_case_sensitive():
+if base != lower:
+yield base
+upper = base.upper()
+if upper != base:
+yield upper
+if __name__ == "__main__":
+# dump a JSON representation of the current python
+# noinspection PyProtectedMember
+print(PythonInfo()._to_json())

Mercurial > repos > shellac > guppy_basecaller

comparison env/lib/python3.7/site-packages/virtualenv/discovery/py_info.py @ 0:26e78fe6e8c4 draft