+++ /dev/null
-"""Package resource API
---------------------
-
-A resource is a logical file contained within a package, or a logical
-subdirectory thereof. The package resource API expects resource names
-to have their path parts separated with ``/``, *not* whatever the local
-path separator is. Do not use os.path operations to manipulate resource
-names being passed into the API.
-
-The package resource API is designed to work with normal filesystem packages,
-.egg files, and unpacked .egg files. It can also work in a limited way with
-.zip files and with custom PEP 302 loaders that support the ``get_data()``
-method.
-"""
-
-import sys, os, zipimport, time, re, imp
-
-try:
- frozenset
-except NameError:
- from sets import ImmutableSet as frozenset
-
-# capture these to bypass sandboxing
-from os import utime, rename, unlink, mkdir
-from os import open as os_open
-from os.path import isdir, split
-
-def _bypass_ensure_directory(name, mode=0777):
- # Sandbox-bypassing version of ensure_directory()
- dirname, filename = split(name)
- if dirname and filename and not isdir(dirname):
- _bypass_ensure_directory(dirname)
- mkdir(dirname, mode)
-
-
-
-
-
-
-
-
-_state_vars = {}
-
-def _declare_state(vartype, **kw):
- g = globals()
- for name, val in kw.iteritems():
- g[name] = val
- _state_vars[name] = vartype
-
-def __getstate__():
- state = {}
- g = globals()
- for k, v in _state_vars.iteritems():
- state[k] = g['_sget_'+v](g[k])
- return state
-
-def __setstate__(state):
- g = globals()
- for k, v in state.iteritems():
- g['_sset_'+_state_vars[k]](k, g[k], v)
- return state
-
-def _sget_dict(val):
- return val.copy()
-
-def _sset_dict(key, ob, state):
- ob.clear()
- ob.update(state)
-
-def _sget_object(val):
- return val.__getstate__()
-
-def _sset_object(key, ob, state):
- ob.__setstate__(state)
-
-_sget_none = _sset_none = lambda *args: None
-
-
-
-
-
-
-def get_supported_platform():
- """Return this platform's maximum compatible version.
-
- distutils.util.get_platform() normally reports the minimum version
- of Mac OS X that would be required to *use* extensions produced by
- distutils. But what we want when checking compatibility is to know the
- version of Mac OS X that we are *running*. To allow usage of packages that
- explicitly require a newer version of Mac OS X, we must also know the
- current version of the OS.
-
- If this condition occurs for any other platform with a version in its
- platform strings, this function should be extended accordingly.
- """
- plat = get_build_platform(); m = macosVersionString.match(plat)
- if m is not None and sys.platform == "darwin":
- try:
- plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
- except ValueError:
- pass # not Mac OS X
- return plat
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-__all__ = [
- # Basic resource access and distribution/entry point discovery
- 'require', 'run_script', 'get_provider', 'get_distribution',
- 'load_entry_point', 'get_entry_map', 'get_entry_info', 'iter_entry_points',
- 'resource_string', 'resource_stream', 'resource_filename',
- 'resource_listdir', 'resource_exists', 'resource_isdir',
-
- # Environmental control
- 'declare_namespace', 'working_set', 'add_activation_listener',
- 'find_distributions', 'set_extraction_path', 'cleanup_resources',
- 'get_default_cache',
-
- # Primary implementation classes
- 'Environment', 'WorkingSet', 'ResourceManager',
- 'Distribution', 'Requirement', 'EntryPoint',
-
- # Exceptions
- 'ResolutionError','VersionConflict','DistributionNotFound','UnknownExtra',
- 'ExtractionError',
-
- # Parsing functions and string utilities
- 'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
- 'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
- 'safe_extra', 'to_filename',
-
- # filesystem utilities
- 'ensure_directory', 'normalize_path',
-
- # Distribution "precedence" constants
- 'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
-
- # "Provider" interfaces, implementations, and registration/lookup APIs
- 'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
- 'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
- 'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
- 'register_finder', 'register_namespace_handler', 'register_loader_type',
- 'fixup_namespace_packages', 'get_importer',
-
- # Deprecated/backward compatibility only
- 'run_main', 'AvailableDistributions',
-]
-class ResolutionError(Exception):
- """Abstract base for dependency resolution errors"""
- def __repr__(self):
- return self.__class__.__name__+repr(self.args)
-
-class VersionConflict(ResolutionError):
- """An already-installed version conflicts with the requested version"""
-
-class DistributionNotFound(ResolutionError):
- """A requested distribution was not found"""
-
-class UnknownExtra(ResolutionError):
- """Distribution doesn't have an "extra feature" of the given name"""
-
-_provider_factories = {}
-PY_MAJOR = sys.version[:3]
-EGG_DIST = 3
-BINARY_DIST = 2
-SOURCE_DIST = 1
-CHECKOUT_DIST = 0
-DEVELOP_DIST = -1
-
-def register_loader_type(loader_type, provider_factory):
- """Register `provider_factory` to make providers for `loader_type`
-
- `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
- and `provider_factory` is a function that, passed a *module* object,
- returns an ``IResourceProvider`` for that module.
- """
- _provider_factories[loader_type] = provider_factory
-
-def get_provider(moduleOrReq):
- """Return an IResourceProvider for the named module or requirement"""
- if isinstance(moduleOrReq,Requirement):
- return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
- try:
- module = sys.modules[moduleOrReq]
- except KeyError:
- __import__(moduleOrReq)
- module = sys.modules[moduleOrReq]
- loader = getattr(module, '__loader__', None)
- return _find_adapter(_provider_factories, loader)(module)
-
-def _macosx_vers(_cache=[]):
- if not _cache:
- from platform import mac_ver
- _cache.append(mac_ver()[0].split('.'))
- return _cache[0]
-
-def _macosx_arch(machine):
- return {'PowerPC':'ppc', 'Power_Macintosh':'ppc'}.get(machine,machine)
-
-def get_build_platform():
- """Return this platform's string for platform-specific distributions
-
- XXX Currently this is the same as ``distutils.util.get_platform()``, but it
- needs some hacks for Linux and Mac OS X.
- """
- from distutils.util import get_platform
- plat = get_platform()
- if sys.platform == "darwin" and not plat.startswith('macosx-'):
- try:
- version = _macosx_vers()
- machine = os.uname()[4].replace(" ", "_")
- return "macosx-%d.%d-%s" % (int(version[0]), int(version[1]),
- _macosx_arch(machine))
- except ValueError:
- # if someone is running a non-Mac darwin system, this will fall
- # through to the default implementation
- pass
- return plat
-
-macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
-darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
-get_platform = get_build_platform # XXX backward compat
-
-
-
-
-
-
-
-def compatible_platforms(provided,required):
- """Can code for the `provided` platform run on the `required` platform?
-
- Returns true if either platform is ``None``, or the platforms are equal.
-
- XXX Needs compatibility checks for Linux and other unixy OSes.
- """
- if provided is None or required is None or provided==required:
- return True # easy case
-
- # Mac OS X special cases
- reqMac = macosVersionString.match(required)
- if reqMac:
- provMac = macosVersionString.match(provided)
-
- # is this a Mac package?
- if not provMac:
- # this is backwards compatibility for packages built before
- # setuptools 0.6. All packages built after this point will
- # use the new macosx designation.
- provDarwin = darwinVersionString.match(provided)
- if provDarwin:
- dversion = int(provDarwin.group(1))
- macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
- if dversion == 7 and macosversion >= "10.3" or \
- dversion == 8 and macosversion >= "10.4":
-
- #import warnings
- #warnings.warn("Mac eggs should be rebuilt to "
- # "use the macosx designation instead of darwin.",
- # category=DeprecationWarning)
- return True
- return False # egg isn't macosx or legacy darwin
-
- # are they the same major version and machine type?
- if provMac.group(1) != reqMac.group(1) or \
- provMac.group(3) != reqMac.group(3):
- return False
-
-
-
- # is the required OS major update >= the provided one?
- if int(provMac.group(2)) > int(reqMac.group(2)):
- return False
-
- return True
-
- # XXX Linux and other platforms' special cases should go here
- return False
-
-
-def run_script(dist_spec, script_name):
- """Locate distribution `dist_spec` and run its `script_name` script"""
- ns = sys._getframe(1).f_globals
- name = ns['__name__']
- ns.clear()
- ns['__name__'] = name
- require(dist_spec)[0].run_script(script_name, ns)
-
-run_main = run_script # backward compatibility
-
-def get_distribution(dist):
- """Return a current distribution object for a Requirement or string"""
- if isinstance(dist,basestring): dist = Requirement.parse(dist)
- if isinstance(dist,Requirement): dist = get_provider(dist)
- if not isinstance(dist,Distribution):
- raise TypeError("Expected string, Requirement, or Distribution", dist)
- return dist
-
-def load_entry_point(dist, group, name):
- """Return `name` entry point of `group` for `dist` or raise ImportError"""
- return get_distribution(dist).load_entry_point(group, name)
-
-def get_entry_map(dist, group=None):
- """Return the entry point map for `group`, or the full entry map"""
- return get_distribution(dist).get_entry_map(group)
-
-def get_entry_info(dist, group, name):
- """Return the EntryPoint object for `group`+`name`, or ``None``"""
- return get_distribution(dist).get_entry_info(group, name)
-
-
-class IMetadataProvider:
-
- def has_metadata(name):
- """Does the package's distribution contain the named metadata?"""
-
- def get_metadata(name):
- """The named metadata resource as a string"""
-
- def get_metadata_lines(name):
- """Yield named metadata resource as list of non-blank non-comment lines
-
- Leading and trailing whitespace is stripped from each line, and lines
- with ``#`` as the first non-blank character are omitted."""
-
- def metadata_isdir(name):
- """Is the named metadata a directory? (like ``os.path.isdir()``)"""
-
- def metadata_listdir(name):
- """List of metadata names in the directory (like ``os.listdir()``)"""
-
- def run_script(script_name, namespace):
- """Execute the named script in the supplied namespace dictionary"""
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-class IResourceProvider(IMetadataProvider):
- """An object that provides access to package resources"""
-
- def get_resource_filename(manager, resource_name):
- """Return a true filesystem path for `resource_name`
-
- `manager` must be an ``IResourceManager``"""
-
- def get_resource_stream(manager, resource_name):
- """Return a readable file-like object for `resource_name`
-
- `manager` must be an ``IResourceManager``"""
-
- def get_resource_string(manager, resource_name):
- """Return a string containing the contents of `resource_name`
-
- `manager` must be an ``IResourceManager``"""
-
- def has_resource(resource_name):
- """Does the package contain the named resource?"""
-
- def resource_isdir(resource_name):
- """Is the named resource a directory? (like ``os.path.isdir()``)"""
-
- def resource_listdir(resource_name):
- """List of resource names in the directory (like ``os.listdir()``)"""
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-class WorkingSet(object):
- """A collection of active distributions on sys.path (or a similar list)"""
-
- def __init__(self, entries=None):
- """Create working set from list of path entries (default=sys.path)"""
- self.entries = []
- self.entry_keys = {}
- self.by_key = {}
- self.callbacks = []
-
- if entries is None:
- entries = sys.path
-
- for entry in entries:
- self.add_entry(entry)
-
-
- def add_entry(self, entry):
- """Add a path item to ``.entries``, finding any distributions on it
-
- ``find_distributions(entry, True)`` is used to find distributions
- corresponding to the path entry, and they are added. `entry` is
- always appended to ``.entries``, even if it is already present.
- (This is because ``sys.path`` can contain the same value more than
- once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
- equal ``sys.path``.)
- """
- self.entry_keys.setdefault(entry, [])
- self.entries.append(entry)
- for dist in find_distributions(entry, True):
- self.add(dist, entry, False)
-
-
- def __contains__(self,dist):
- """True if `dist` is the active distribution for its project"""
- return self.by_key.get(dist.key) == dist
-
-
-
-
-
- def find(self, req):
- """Find a distribution matching requirement `req`
-
- If there is an active distribution for the requested project, this
- returns it as long as it meets the version requirement specified by
- `req`. But, if there is an active distribution for the project and it
- does *not* meet the `req` requirement, ``VersionConflict`` is raised.
- If there is no active distribution for the requested project, ``None``
- is returned.
- """
- dist = self.by_key.get(req.key)
- if dist is not None and dist not in req:
- raise VersionConflict(dist,req) # XXX add more info
- else:
- return dist
-
- def iter_entry_points(self, group, name=None):
- """Yield entry point objects from `group` matching `name`
-
- If `name` is None, yields all entry points in `group` from all
- distributions in the working set, otherwise only ones matching
- both `group` and `name` are yielded (in distribution order).
- """
- for dist in self:
- entries = dist.get_entry_map(group)
- if name is None:
- for ep in entries.values():
- yield ep
- elif name in entries:
- yield entries[name]
-
- def run_script(self, requires, script_name):
- """Locate distribution for `requires` and run `script_name` script"""
- ns = sys._getframe(1).f_globals
- name = ns['__name__']
- ns.clear()
- ns['__name__'] = name
- self.require(requires)[0].run_script(script_name, ns)
-
-
-
- def __iter__(self):
- """Yield distributions for non-duplicate projects in the working set
-
- The yield order is the order in which the items' path entries were
- added to the working set.
- """
- seen = {}
- for item in self.entries:
- for key in self.entry_keys[item]:
- if key not in seen:
- seen[key]=1
- yield self.by_key[key]
-
- def add(self, dist, entry=None, insert=True):
- """Add `dist` to working set, associated with `entry`
-
- If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
- On exit from this routine, `entry` is added to the end of the working
- set's ``.entries`` (if it wasn't already present).
-
- `dist` is only added to the working set if it's for a project that
- doesn't already have a distribution in the set. If it's added, any
- callbacks registered with the ``subscribe()`` method will be called.
- """
- if insert:
- dist.insert_on(self.entries, entry)
-
- if entry is None:
- entry = dist.location
- keys = self.entry_keys.setdefault(entry,[])
- keys2 = self.entry_keys.setdefault(dist.location,[])
- if dist.key in self.by_key:
- return # ignore hidden distros
-
- # If we have a __requires__ then we can already tell if this
- # dist is unsatisfactory, in which case we won't add it.
- if __requires__ is not None:
- for thisreqstr in __requires__:
- for thisreq in parse_requirements(thisreqstr):
- if thisreq.key == dist.key:
- if dist not in thisreq:
- return
-
-
- self.by_key[dist.key] = dist
- if dist.key not in keys:
- keys.append(dist.key)
- if dist.key not in keys2:
- keys2.append(dist.key)
- self._added_new(dist)
-
- def resolve(self, requirements, env=None, installer=None):
- """List all distributions needed to (recursively) meet `requirements`
-
- `requirements` must be a sequence of ``Requirement`` objects. `env`,
- if supplied, should be an ``Environment`` instance. If
- not supplied, it defaults to all distributions available within any
- entry or distribution in the working set. `installer`, if supplied,
- will be invoked with each requirement that cannot be met by an
- already-installed distribution; it should return a ``Distribution`` or
- ``None``.
- """
-
- requirements = list(requirements)[::-1] # set up the stack
- processed = {} # set of processed requirements
- best = {} # key -> dist
- to_activate = []
-
- while requirements:
- req = requirements.pop(0) # process dependencies breadth-first
- if req in processed:
- # Ignore cyclic or redundant dependencies
- continue
- dist = best.get(req.key)
- if dist is None:
- # Find the best distribution and add it to the map
- dist = self.by_key.get(req.key)
- if dist is None:
- if env is None:
- env = Environment(self.entries)
- dist = best[req.key] = env.best_match(req, self, installer)
- if dist is None:
- raise DistributionNotFound(req) # XXX put more info here
- to_activate.append(dist)
- if dist not in req:
- # Oops, the "best" so far conflicts with a dependency
- raise VersionConflict(dist,req) # XXX put more info here
- requirements.extend(dist.requires(req.extras)[::-1])
- processed[req] = True
-
- return to_activate # return list of distros to activate
-
- def find_plugins(self,
- plugin_env, full_env=None, installer=None, fallback=True
- ):
- """Find all activatable distributions in `plugin_env`
-
- Example usage::
-
- distributions, errors = working_set.find_plugins(
- Environment(plugin_dirlist)
- )
- map(working_set.add, distributions) # add plugins+libs to sys.path
- print "Couldn't load", errors # display errors
-
- The `plugin_env` should be an ``Environment`` instance that contains
- only distributions that are in the project's "plugin directory" or
- directories. The `full_env`, if supplied, should be an ``Environment``
- contains all currently-available distributions. If `full_env` is not
- supplied, one is created automatically from the ``WorkingSet`` this
- method is called on, which will typically mean that every directory on
- ``sys.path`` will be scanned for distributions.
-
- `installer` is a standard installer callback as used by the
- ``resolve()`` method. The `fallback` flag indicates whether we should
- attempt to resolve older versions of a plugin if the newest version
- cannot be resolved.
-
- This method returns a 2-tuple: (`distributions`, `error_info`), where
- `distributions` is a list of the distributions found in `plugin_env`
- that were loadable, along with any other distributions that are needed
- to resolve their dependencies. `error_info` is a dictionary mapping
- unloadable plugin distributions to an exception instance describing the
- error that occurred. Usually this will be a ``DistributionNotFound`` or
- ``VersionConflict`` instance.
- """
-
- plugin_projects = list(plugin_env)
- plugin_projects.sort() # scan project names in alphabetic order
-
- error_info = {}
- distributions = {}
-
- if full_env is None:
- env = Environment(self.entries)
- env += plugin_env
- else:
- env = full_env + plugin_env
-
- shadow_set = self.__class__([])
- map(shadow_set.add, self) # put all our entries in shadow_set
-
- for project_name in plugin_projects:
-
- for dist in plugin_env[project_name]:
-
- req = [dist.as_requirement()]
-
- try:
- resolvees = shadow_set.resolve(req, env, installer)
-
- except ResolutionError,v:
- error_info[dist] = v # save error info
- if fallback:
- continue # try the next older version of project
- else:
- break # give up on this project, keep going
-
- else:
- map(shadow_set.add, resolvees)
- distributions.update(dict.fromkeys(resolvees))
-
- # success, no need to try any more versions of this project
- break
-
- distributions = list(distributions)
- distributions.sort()
-
- return distributions, error_info
-
-
-
-
-
- def require(self, *requirements):
- """Ensure that distributions matching `requirements` are activated
-
- `requirements` must be a string or a (possibly-nested) sequence
- thereof, specifying the distributions and versions required. The
- return value is a sequence of the distributions that needed to be
- activated to fulfill the requirements; all relevant distributions are
- included, even if they were already activated in this working set.
- """
- needed = self.resolve(parse_requirements(requirements))
-
- for dist in needed:
- self.add(dist)
-
- return needed
-
- def subscribe(self, callback):
- """Invoke `callback` for all distributions (including existing ones)"""
- if callback in self.callbacks:
- return
- self.callbacks.append(callback)
- for dist in self:
- callback(dist)
-
- def _added_new(self, dist):
- for callback in self.callbacks:
- callback(dist)
-
- def __getstate__(self):
- return (
- self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
- self.callbacks[:]
- )
-
- def __setstate__(self, (entries, keys, by_key, callbacks)):
- self.entries = entries[:]
- self.entry_keys = keys.copy()
- self.by_key = by_key.copy()
- self.callbacks = callbacks[:]
-
-
-class Environment(object):
- """Searchable snapshot of distributions on a search path"""
-
- def __init__(self, search_path=None, platform=get_supported_platform(), python=PY_MAJOR):
- """Snapshot distributions available on a search path
-
- Any distributions found on `search_path` are added to the environment.
- `search_path` should be a sequence of ``sys.path`` items. If not
- supplied, ``sys.path`` is used.
-
- `platform` is an optional string specifying the name of the platform
- that platform-specific distributions must be compatible with. If
- unspecified, it defaults to the current platform. `python` is an
- optional string naming the desired version of Python (e.g. ``'2.4'``);
- it defaults to the current version.
-
- You may explicitly set `platform` (and/or `python`) to ``None`` if you
- wish to map *all* distributions, not just those compatible with the
- running platform or Python version.
- """
- self._distmap = {}
- self._cache = {}
- self.platform = platform
- self.python = python
- self.scan(search_path)
-
- def can_add(self, dist):
- """Is distribution `dist` acceptable for this environment?
-
- The distribution must match the platform and python version
- requirements specified when this environment was created, or False
- is returned.
- """
- return (self.python is None or dist.py_version is None
- or dist.py_version==self.python) \
- and compatible_platforms(dist.platform,self.platform)
-
- def remove(self, dist):
- """Remove `dist` from the environment"""
- self._distmap[dist.key].remove(dist)
-
- def scan(self, search_path=None):
- """Scan `search_path` for distributions usable in this environment
-
- Any distributions found are added to the environment.
- `search_path` should be a sequence of ``sys.path`` items. If not
- supplied, ``sys.path`` is used. Only distributions conforming to
- the platform/python version defined at initialization are added.
- """
- if search_path is None:
- search_path = sys.path
-
- for item in search_path:
- for dist in find_distributions(item):
- self.add(dist)
-
- def __getitem__(self,project_name):
- """Return a newest-to-oldest list of distributions for `project_name`
- """
- try:
- return self._cache[project_name]
- except KeyError:
- project_name = project_name.lower()
- if project_name not in self._distmap:
- return []
-
- if project_name not in self._cache:
- dists = self._cache[project_name] = self._distmap[project_name]
- _sort_dists(dists)
-
- return self._cache[project_name]
-
- def add(self,dist):
- """Add `dist` if we ``can_add()`` it and it isn't already added"""
- if self.can_add(dist) and dist.has_version():
- dists = self._distmap.setdefault(dist.key,[])
- if dist not in dists:
- dists.append(dist)
- if dist.key in self._cache:
- _sort_dists(self._cache[dist.key])
-
-
- def best_match(self, req, working_set, installer=None):
- """Find distribution best matching `req` and usable on `working_set`
-
- This calls the ``find(req)`` method of the `working_set` to see if a
- suitable distribution is already active. (This may raise
- ``VersionConflict`` if an unsuitable version of the project is already
- active in the specified `working_set`.)
-
- If a suitable distribution isn't active, this method returns the
- newest platform-dependent distribution in the environment that meets
- the ``Requirement`` in `req`. If no suitable platform-dependent
- distribution is found, then the newest platform-independent
- distribution that meets the requirement is returned. (A platform-
- dependent distribution will typically have code compiled or
- specialized for that platform.)
-
- Otherwise, if `installer` is supplied, then the result of calling the
- environment's ``obtain(req, installer)`` method will be returned.
- """
- dist = working_set.find(req)
- if dist is not None:
- return dist
-
- # first try to find a platform-dependent dist
- for dist in self[req.key]:
- if dist in req and dist.platform is not None:
- return dist
-
- # then try any other dist
- for dist in self[req.key]:
- if dist in req:
- return dist
-
- return self.obtain(req, installer) # try and download/install
-
- def obtain(self, requirement, installer=None):
- """Obtain a distribution matching `requirement` (e.g. via download)
-
- Obtain a distro that matches requirement (e.g. via download). In the
- base ``Environment`` class, this routine just returns
- ``installer(requirement)``, unless `installer` is None, in which case
- None is returned instead. This method is a hook that allows subclasses
- to attempt other ways of obtaining a distribution before falling back
- to the `installer` argument."""
- if installer is not None:
- return installer(requirement)
-
- def __iter__(self):
- """Yield the unique project names of the available distributions"""
- for key in self._distmap.keys():
- if self[key]: yield key
-
-
-
-
- def __iadd__(self, other):
- """In-place addition of a distribution or environment"""
- if isinstance(other,Distribution):
- self.add(other)
- elif isinstance(other,Environment):
- for project in other:
- for dist in other[project]:
- self.add(dist)
- else:
- raise TypeError("Can't add %r to environment" % (other,))
- return self
-
- def __add__(self, other):
- """Add an environment or distribution to an environment"""
- new = self.__class__([], platform=None, python=None)
- for env in self, other:
- new += env
- return new
-
-
-AvailableDistributions = Environment # XXX backward compatibility
-
-
-class ExtractionError(RuntimeError):
- """An error occurred extracting a resource
-
- The following attributes are available from instances of this exception:
-
- manager
- The resource manager that raised this exception
-
- cache_path
- The base directory for resource extraction
-
- original_error
- The exception instance that caused extraction to fail
- """
-
-
-
-
-class ResourceManager:
- """Manage resource extraction and packages"""
- extraction_path = None
-
- def __init__(self):
- self.cached_files = {}
-
- def resource_exists(self, package_or_requirement, resource_name):
- """Does the named resource exist?"""
- return get_provider(package_or_requirement).has_resource(resource_name)
-
- def resource_isdir(self, package_or_requirement, resource_name):
- """Is the named resource an existing directory?"""
- return get_provider(package_or_requirement).resource_isdir(
- resource_name
- )
-
- def resource_filename(self, package_or_requirement, resource_name):
- """Return a true filesystem path for specified resource"""
- return get_provider(package_or_requirement).get_resource_filename(
- self, resource_name
- )
-
- def resource_stream(self, package_or_requirement, resource_name):
- """Return a readable file-like object for specified resource"""
- return get_provider(package_or_requirement).get_resource_stream(
- self, resource_name
- )
-
- def resource_string(self, package_or_requirement, resource_name):
- """Return specified resource as a string"""
- return get_provider(package_or_requirement).get_resource_string(
- self, resource_name
- )
-
- def resource_listdir(self, package_or_requirement, resource_name):
- """List the contents of the named resource directory"""
- return get_provider(package_or_requirement).resource_listdir(
- resource_name
- )
-
- def extraction_error(self):
- """Give an error message for problems extracting file(s)"""
-
- old_exc = sys.exc_info()[1]
- cache_path = self.extraction_path or get_default_cache()
-
- err = ExtractionError("""Can't extract file(s) to egg cache
-
-The following error occurred while trying to extract file(s) to the Python egg
-cache:
-
- %s
-
-The Python egg cache directory is currently set to:
-
- %s
-
-Perhaps your account does not have write access to this directory? You can
-change the cache directory by setting the PYTHON_EGG_CACHE environment
-variable to point to an accessible directory.
-""" % (old_exc, cache_path)
- )
- err.manager = self
- err.cache_path = cache_path
- err.original_error = old_exc
- raise err
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- def get_cache_path(self, archive_name, names=()):
- """Return absolute location in cache for `archive_name` and `names`
-
- The parent directory of the resulting path will be created if it does
- not already exist. `archive_name` should be the base filename of the
- enclosing egg (which may not be the name of the enclosing zipfile!),
- including its ".egg" extension. `names`, if provided, should be a
- sequence of path name parts "under" the egg's extraction location.
-
- This method should only be called by resource providers that need to
- obtain an extraction location, and only for names they intend to
- extract, as it tracks the generated names for possible cleanup later.
- """
- extract_path = self.extraction_path or get_default_cache()
- target_path = os.path.join(extract_path, archive_name+'-tmp', *names)
- try:
- _bypass_ensure_directory(target_path)
- except:
- self.extraction_error()
-
- self.cached_files[target_path] = 1
- return target_path
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- def postprocess(self, tempname, filename):
- """Perform any platform-specific postprocessing of `tempname`
-
- This is where Mac header rewrites should be done; other platforms don't
- have anything special they should do.
-
- Resource providers should call this method ONLY after successfully
- extracting a compressed resource. They must NOT call it on resources
- that are already in the filesystem.
-
- `tempname` is the current (temporary) name of the file, and `filename`
- is the name it will be renamed to by the caller after this routine
- returns.
- """
-
- if os.name == 'posix':
- # Make the resource executable
- mode = ((os.stat(tempname).st_mode) | 0555) & 07777
- os.chmod(tempname, mode)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- def set_extraction_path(self, path):
- """Set the base path where resources will be extracted to, if needed.
-
- If you do not call this routine before any extractions take place, the
- path defaults to the return value of ``get_default_cache()``. (Which
- is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
- platform-specific fallbacks. See that routine's documentation for more
- details.)
-
- Resources are extracted to subdirectories of this path based upon
- information given by the ``IResourceProvider``. You may set this to a
- temporary directory, but then you must call ``cleanup_resources()`` to
- delete the extracted files when done. There is no guarantee that
- ``cleanup_resources()`` will be able to remove all extracted files.
-
- (Note: you may not change the extraction path for a given resource
- manager once resources have been extracted, unless you first call
- ``cleanup_resources()``.)
- """
- if self.cached_files:
- raise ValueError(
- "Can't change extraction path, files already extracted"
- )
-
- self.extraction_path = path
-
- def cleanup_resources(self, force=False):
- """
- Delete all extracted resource files and directories, returning a list
- of the file and directory names that could not be successfully removed.
- This function does not have any concurrency protection, so it should
- generally only be called when the extraction path is a temporary
- directory exclusive to a single process. This method is not
- automatically called; you must call it explicitly or register it as an
- ``atexit`` function if you wish to ensure cleanup of a temporary
- directory used for extractions.
- """
- # XXX
-
-
-
-def get_default_cache():
- """Determine the default cache location
-
- This returns the ``PYTHON_EGG_CACHE`` environment variable, if set.
- Otherwise, on Windows, it returns a "Python-Eggs" subdirectory of the
- "Application Data" directory. On all other systems, it's "~/.python-eggs".
- """
- try:
- return os.environ['PYTHON_EGG_CACHE']
- except KeyError:
- pass
-
- if os.name!='nt':
- return os.path.expanduser('~/.python-eggs')
-
- app_data = 'Application Data' # XXX this may be locale-specific!
- app_homes = [
- (('APPDATA',), None), # best option, should be locale-safe
- (('USERPROFILE',), app_data),
- (('HOMEDRIVE','HOMEPATH'), app_data),
- (('HOMEPATH',), app_data),
- (('HOME',), None),
- (('WINDIR',), app_data), # 95/98/ME
- ]
-
- for keys, subdir in app_homes:
- dirname = ''
- for key in keys:
- if key in os.environ:
- dirname = os.path.join(dirname, os.environ[key])
- else:
- break
- else:
- if subdir:
- dirname = os.path.join(dirname,subdir)
- return os.path.join(dirname, 'Python-Eggs')
- else:
- raise RuntimeError(
- "Please set the PYTHON_EGG_CACHE enviroment variable"
- )
-
-def safe_name(name):
- """Convert an arbitrary string to a standard distribution name
-
- Any runs of non-alphanumeric/. characters are replaced with a single '-'.
- """
- return re.sub('[^A-Za-z0-9.]+', '-', name)
-
-
-def safe_version(version):
- """Convert an arbitrary string to a standard version string
-
- Spaces become dots, and all other non-alphanumeric characters become
- dashes, with runs of multiple dashes condensed to a single dash.
- """
- version = version.replace(' ','.')
- return re.sub('[^A-Za-z0-9.]+', '-', version)
-
-
-def safe_extra(extra):
- """Convert an arbitrary string to a standard 'extra' name
-
- Any runs of non-alphanumeric characters are replaced with a single '_',
- and the result is always lowercased.
- """
- return re.sub('[^A-Za-z0-9.]+', '_', extra).lower()
-
-
-def to_filename(name):
- """Convert a project or version name to its filename-escaped form
-
- Any '-' characters are currently replaced with '_'.
- """
- return name.replace('-','_')
-
-
-
-
-
-
-
-
-class NullProvider:
- """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
-
- egg_name = None
- egg_info = None
- loader = None
-
- def __init__(self, module):
- self.loader = getattr(module, '__loader__', None)
- self.module_path = os.path.dirname(getattr(module, '__file__', ''))
-
- def get_resource_filename(self, manager, resource_name):
- return self._fn(self.module_path, resource_name)
-
- def get_resource_stream(self, manager, resource_name):
- return StringIO(self.get_resource_string(manager, resource_name))
-
- def get_resource_string(self, manager, resource_name):
- return self._get(self._fn(self.module_path, resource_name))
-
- def has_resource(self, resource_name):
- return self._has(self._fn(self.module_path, resource_name))
-
- def has_metadata(self, name):
- return self.egg_info and self._has(self._fn(self.egg_info,name))
-
- def get_metadata(self, name):
- if not self.egg_info:
- return ""
- return self._get(self._fn(self.egg_info,name))
-
- def get_metadata_lines(self, name):
- return yield_lines(self.get_metadata(name))
-
- def resource_isdir(self,resource_name):
- return self._isdir(self._fn(self.module_path, resource_name))
-
- def metadata_isdir(self,name):
- return self.egg_info and self._isdir(self._fn(self.egg_info,name))
-
-
- def resource_listdir(self,resource_name):
- return self._listdir(self._fn(self.module_path,resource_name))
-
- def metadata_listdir(self,name):
- if self.egg_info:
- return self._listdir(self._fn(self.egg_info,name))
- return []
-
- def run_script(self,script_name,namespace):
- script = 'scripts/'+script_name
- if not self.has_metadata(script):
- raise ResolutionError("No script named %r" % script_name)
- script_text = self.get_metadata(script).replace('\r\n','\n')
- script_text = script_text.replace('\r','\n')
- script_filename = self._fn(self.egg_info,script)
- namespace['__file__'] = script_filename
- if os.path.exists(script_filename):
- execfile(script_filename, namespace, namespace)
- else:
- from linecache import cache
- cache[script_filename] = (
- len(script_text), 0, script_text.split('\n'), script_filename
- )
- script_code = compile(script_text,script_filename,'exec')
- exec script_code in namespace, namespace
-
- def _has(self, path):
- raise NotImplementedError(
- "Can't perform this operation for unregistered loader type"
- )
-
- def _isdir(self, path):
- raise NotImplementedError(
- "Can't perform this operation for unregistered loader type"
- )
-
- def _listdir(self, path):
- raise NotImplementedError(
- "Can't perform this operation for unregistered loader type"
- )
-
- def _fn(self, base, resource_name):
- if resource_name:
- return os.path.join(base, *resource_name.split('/'))
- return base
-
- def _get(self, path):
- if hasattr(self.loader, 'get_data'):
- return self.loader.get_data(path)
- raise NotImplementedError(
- "Can't perform this operation for loaders without 'get_data()'"
- )
-
-register_loader_type(object, NullProvider)
-
-
-class EggProvider(NullProvider):
- """Provider based on a virtual filesystem"""
-
- def __init__(self,module):
- NullProvider.__init__(self,module)
- self._setup_prefix()
-
- def _setup_prefix(self):
- # we assume here that our metadata may be nested inside a "basket"
- # of multiple eggs; that's why we use module_path instead of .archive
- path = self.module_path
- old = None
- while path!=old:
- if path.lower().endswith('.egg'):
- self.egg_name = os.path.basename(path)
- self.egg_info = os.path.join(path, 'EGG-INFO')
- self.egg_root = path
- break
- old = path
- path, base = os.path.split(path)
-
-
-
-
-
-
-class DefaultProvider(EggProvider):
- """Provides access to package resources in the filesystem"""
-
- def _has(self, path):
- return os.path.exists(path)
-
- def _isdir(self,path):
- return os.path.isdir(path)
-
- def _listdir(self,path):
- return os.listdir(path)
-
- def get_resource_stream(self, manager, resource_name):
- return open(self._fn(self.module_path, resource_name), 'rb')
-
- def _get(self, path):
- stream = open(path, 'rb')
- try:
- return stream.read()
- finally:
- stream.close()
-
-register_loader_type(type(None), DefaultProvider)
-
-
-class EmptyProvider(NullProvider):
- """Provider that returns nothing for all requests"""
-
- _isdir = _has = lambda self,path: False
- _get = lambda self,path: ''
- _listdir = lambda self,path: []
- module_path = None
-
- def __init__(self):
- pass
-
-empty_provider = EmptyProvider()
-
-
-
-
-class ZipProvider(EggProvider):
- """Resource support for zips and eggs"""
-
- eagers = None
-
- def __init__(self, module):
- EggProvider.__init__(self,module)
- self.zipinfo = zipimport._zip_directory_cache[self.loader.archive]
- self.zip_pre = self.loader.archive+os.sep
-
- def _zipinfo_name(self, fspath):
- # Convert a virtual filename (full path to file) into a zipfile subpath
- # usable with the zipimport directory cache for our target archive
- if fspath.startswith(self.zip_pre):
- return fspath[len(self.zip_pre):]
- raise AssertionError(
- "%s is not a subpath of %s" % (fspath,self.zip_pre)
- )
-
- def _parts(self,zip_path):
- # Convert a zipfile subpath into an egg-relative path part list
- fspath = self.zip_pre+zip_path # pseudo-fs path
- if fspath.startswith(self.egg_root+os.sep):
- return fspath[len(self.egg_root)+1:].split(os.sep)
- raise AssertionError(
- "%s is not a subpath of %s" % (fspath,self.egg_root)
- )
-
- def get_resource_filename(self, manager, resource_name):
- if not self.egg_name:
- raise NotImplementedError(
- "resource_filename() only supported for .egg, not .zip"
- )
- # no need to lock for extraction, since we use temp names
- zip_path = self._resource_to_zip(resource_name)
- eagers = self._get_eager_resources()
- if '/'.join(self._parts(zip_path)) in eagers:
- for name in eagers:
- self._extract_resource(manager, self._eager_to_zip(name))
- return self._extract_resource(manager, zip_path)
-
- def _extract_resource(self, manager, zip_path):
-
- if zip_path in self._index():
- for name in self._index()[zip_path]:
- last = self._extract_resource(
- manager, os.path.join(zip_path, name)
- )
- return os.path.dirname(last) # return the extracted directory name
-
- zip_stat = self.zipinfo[zip_path]
- t,d,size = zip_stat[5], zip_stat[6], zip_stat[3]
- date_time = (
- (d>>9)+1980, (d>>5)&0xF, d&0x1F, # ymd
- (t&0xFFFF)>>11, (t>>5)&0x3F, (t&0x1F) * 2, 0, 0, -1 # hms, etc.
- )
- timestamp = time.mktime(date_time)
-
- try:
- real_path = manager.get_cache_path(
- self.egg_name, self._parts(zip_path)
- )
-
- if os.path.isfile(real_path):
- stat = os.stat(real_path)
- if stat.st_size==size and stat.st_mtime==timestamp:
- # size and stamp match, don't bother extracting
- return real_path
-
- outf, tmpnam = _mkstemp(".$extract", dir=os.path.dirname(real_path))
- os.write(outf, self.loader.get_data(zip_path))
- os.close(outf)
- utime(tmpnam, (timestamp,timestamp))
- manager.postprocess(tmpnam, real_path)
-
- try:
- rename(tmpnam, real_path)
-
- except os.error:
- if os.path.isfile(real_path):
- stat = os.stat(real_path)
-
- if stat.st_size==size and stat.st_mtime==timestamp:
- # size and stamp match, somebody did it just ahead of
- # us, so we're done
- return real_path
- elif os.name=='nt': # Windows, del old file and retry
- unlink(real_path)
- rename(tmpnam, real_path)
- return real_path
- raise
-
- except os.error:
- manager.extraction_error() # report a user-friendly error
-
- return real_path
-
- def _get_eager_resources(self):
- if self.eagers is None:
- eagers = []
- for name in ('native_libs.txt', 'eager_resources.txt'):
- if self.has_metadata(name):
- eagers.extend(self.get_metadata_lines(name))
- self.eagers = eagers
- return self.eagers
-
- def _index(self):
- try:
- return self._dirindex
- except AttributeError:
- ind = {}
- for path in self.zipinfo:
- parts = path.split(os.sep)
- while parts:
- parent = os.sep.join(parts[:-1])
- if parent in ind:
- ind[parent].append(parts[-1])
- break
- else:
- ind[parent] = [parts.pop()]
- self._dirindex = ind
- return ind
-
- def _has(self, fspath):
- zip_path = self._zipinfo_name(fspath)
- return zip_path in self.zipinfo or zip_path in self._index()
-
- def _isdir(self,fspath):
- return self._zipinfo_name(fspath) in self._index()
-
- def _listdir(self,fspath):
- return list(self._index().get(self._zipinfo_name(fspath), ()))
-
- def _eager_to_zip(self,resource_name):
- return self._zipinfo_name(self._fn(self.egg_root,resource_name))
-
- def _resource_to_zip(self,resource_name):
- return self._zipinfo_name(self._fn(self.module_path,resource_name))
-
-register_loader_type(zipimport.zipimporter, ZipProvider)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-class FileMetadata(EmptyProvider):
- """Metadata handler for standalone PKG-INFO files
-
- Usage::
-
- metadata = FileMetadata("/path/to/PKG-INFO")
-
- This provider rejects all data and metadata requests except for PKG-INFO,
- which is treated as existing, and will be the contents of the file at
- the provided location.
- """
-
- def __init__(self,path):
- self.path = path
-
- def has_metadata(self,name):
- return name=='PKG-INFO'
-
- def get_metadata(self,name):
- if name=='PKG-INFO':
- return open(self.path,'rU').read()
- raise KeyError("No metadata except PKG-INFO is available")
-
- def get_metadata_lines(self,name):
- return yield_lines(self.get_metadata(name))
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-class PathMetadata(DefaultProvider):
- """Metadata provider for egg directories
-
- Usage::
-
- # Development eggs:
-
- egg_info = "/path/to/PackageName.egg-info"
- base_dir = os.path.dirname(egg_info)
- metadata = PathMetadata(base_dir, egg_info)
- dist_name = os.path.splitext(os.path.basename(egg_info))[0]
- dist = Distribution(basedir,project_name=dist_name,metadata=metadata)
-
- # Unpacked egg directories:
-
- egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
- metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
- dist = Distribution.from_filename(egg_path, metadata=metadata)
- """
-
- def __init__(self, path, egg_info):
- self.module_path = path
- self.egg_info = egg_info
-
-
-class EggMetadata(ZipProvider):
- """Metadata provider for .egg files"""
-
- def __init__(self, importer):
- """Create a metadata provider from a zipimporter"""
-
- self.zipinfo = zipimport._zip_directory_cache[importer.archive]
- self.zip_pre = importer.archive+os.sep
- self.loader = importer
- if importer.prefix:
- self.module_path = os.path.join(importer.archive, importer.prefix)
- else:
- self.module_path = importer.archive
- self._setup_prefix()
-
-
-class ImpWrapper:
- """PEP 302 Importer that wraps Python's "normal" import algorithm"""
-
- def __init__(self, path=None):
- self.path = path
-
- def find_module(self, fullname, path=None):
- subname = fullname.split(".")[-1]
- if subname != fullname and self.path is None:
- return None
- if self.path is None:
- path = None
- else:
- path = [self.path]
- try:
- file, filename, etc = imp.find_module(subname, path)
- except ImportError:
- return None
- return ImpLoader(file, filename, etc)
-
-
-class ImpLoader:
- """PEP 302 Loader that wraps Python's "normal" import algorithm"""
-
- def __init__(self, file, filename, etc):
- self.file = file
- self.filename = filename
- self.etc = etc
-
- def load_module(self, fullname):
- try:
- mod = imp.load_module(fullname, self.file, self.filename, self.etc)
- finally:
- if self.file: self.file.close()
- # Note: we don't set __loader__ because we want the module to look
- # normal; i.e. this is just a wrapper for standard import machinery
- return mod
-
-
-
-
-def get_importer(path_item):
- """Retrieve a PEP 302 "importer" for the given path item
-
- If there is no importer, this returns a wrapper around the builtin import
- machinery. The returned importer is only cached if it was created by a
- path hook.
- """
- try:
- importer = sys.path_importer_cache[path_item]
- except KeyError:
- for hook in sys.path_hooks:
- try:
- importer = hook(path_item)
- except ImportError:
- pass
- else:
- break
- else:
- importer = None
-
- sys.path_importer_cache.setdefault(path_item,importer)
- if importer is None:
- try:
- importer = ImpWrapper(path_item)
- except ImportError:
- pass
- return importer
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-_declare_state('dict', _distribution_finders = {})
-
-def register_finder(importer_type, distribution_finder):
- """Register `distribution_finder` to find distributions in sys.path items
-
- `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
- handler), and `distribution_finder` is a callable that, passed a path
- item and the importer instance, yields ``Distribution`` instances found on
- that path item. See ``pkg_resources.find_on_path`` for an example."""
- _distribution_finders[importer_type] = distribution_finder
-
-
-def find_distributions(path_item, only=False):
- """Yield distributions accessible via `path_item`"""
- importer = get_importer(path_item)
- finder = _find_adapter(_distribution_finders, importer)
- return finder(importer, path_item, only)
-
-def find_in_zip(importer, path_item, only=False):
- metadata = EggMetadata(importer)
- if metadata.has_metadata('PKG-INFO'):
- yield Distribution.from_filename(path_item, metadata=metadata)
- if only:
- return # don't yield nested distros
- for subitem in metadata.resource_listdir('/'):
- if subitem.endswith('.egg'):
- subpath = os.path.join(path_item, subitem)
- for dist in find_in_zip(zipimport.zipimporter(subpath), subpath):
- yield dist
-
-register_finder(zipimport.zipimporter, find_in_zip)
-
-def StringIO(*args, **kw):
- """Thunk to load the real StringIO on demand"""
- global StringIO
- try:
- from cStringIO import StringIO
- except ImportError:
- from StringIO import StringIO
- return StringIO(*args,**kw)
-
-def find_nothing(importer, path_item, only=False):
- return ()
-register_finder(object,find_nothing)
-
-def find_on_path(importer, path_item, only=False):
- """Yield distributions accessible on a sys.path directory"""
- path_item = _normalize_cached(path_item)
-
- if os.path.isdir(path_item) and os.access(path_item, os.R_OK):
- if path_item.lower().endswith('.egg'):
- # unpacked egg
- yield Distribution.from_filename(
- path_item, metadata=PathMetadata(
- path_item, os.path.join(path_item,'EGG-INFO')
- )
- )
- else:
- # scan for .egg and .egg-info in directory
- for entry in os.listdir(path_item):
- lower = entry.lower()
- if lower.endswith('.egg-info'):
- fullpath = os.path.join(path_item, entry)
- if os.path.isdir(fullpath):
- # egg-info directory, allow getting metadata
- metadata = PathMetadata(path_item, fullpath)
- else:
- metadata = FileMetadata(fullpath)
- yield Distribution.from_location(
- path_item,entry,metadata,precedence=DEVELOP_DIST
- )
- elif not only and lower.endswith('.egg'):
- for dist in find_distributions(os.path.join(path_item, entry)):
- yield dist
- elif not only and lower.endswith('.egg-link'):
- for line in file(os.path.join(path_item, entry)):
- if not line.strip(): continue
- for item in find_distributions(os.path.join(path_item,line.rstrip())):
- yield item
- break
-register_finder(ImpWrapper, find_on_path)
-
-_declare_state('dict', _namespace_handlers = {})
-_declare_state('dict', _namespace_packages = {})
-
-def register_namespace_handler(importer_type, namespace_handler):
- """Register `namespace_handler` to declare namespace packages
-
- `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
- handler), and `namespace_handler` is a callable like this::
-
- def namespace_handler(importer,path_entry,moduleName,module):
- # return a path_entry to use for child packages
-
- Namespace handlers are only called if the importer object has already
- agreed that it can handle the relevant path item, and they should only
- return a subpath if the module __path__ does not already contain an
- equivalent subpath. For an example namespace handler, see
- ``pkg_resources.file_ns_handler``.
- """
- _namespace_handlers[importer_type] = namespace_handler
-
-def _handle_ns(packageName, path_item):
- """Ensure that named package includes a subpath of path_item (if needed)"""
- importer = get_importer(path_item)
- if importer is None:
- return None
- loader = importer.find_module(packageName)
- if loader is None:
- return None
- module = sys.modules.get(packageName)
- if module is None:
- module = sys.modules[packageName] = imp.new_module(packageName)
- module.__path__ = []; _set_parent_ns(packageName)
- elif not hasattr(module,'__path__'):
- raise TypeError("Not a package:", packageName)
- handler = _find_adapter(_namespace_handlers, importer)
- subpath = handler(importer,path_item,packageName,module)
- if subpath is not None:
- path = module.__path__; path.append(subpath)
- loader.load_module(packageName); module.__path__ = path
- return subpath
-
-def declare_namespace(packageName):
- """Declare that package 'packageName' is a namespace package"""
-
- imp.acquire_lock()
- try:
- if packageName in _namespace_packages:
- return
-
- path, parent = sys.path, None
- if '.' in packageName:
- parent = '.'.join(packageName.split('.')[:-1])
- declare_namespace(parent)
- __import__(parent)
- try:
- path = sys.modules[parent].__path__
- except AttributeError:
- raise TypeError("Not a package:", parent)
-
- # Track what packages are namespaces, so when new path items are added,
- # they can be updated
- _namespace_packages.setdefault(parent,[]).append(packageName)
- _namespace_packages.setdefault(packageName,[])
-
- for path_item in path:
- # Ensure all the parent's path items are reflected in the child,
- # if they apply
- _handle_ns(packageName, path_item)
-
- finally:
- imp.release_lock()
-
-def fixup_namespace_packages(path_item, parent=None):
- """Ensure that previously-declared namespace packages include path_item"""
- imp.acquire_lock()
- try:
- for package in _namespace_packages.get(parent,()):
- subpath = _handle_ns(package, path_item)
- if subpath: fixup_namespace_packages(subpath,package)
- finally:
- imp.release_lock()
-
-def file_ns_handler(importer, path_item, packageName, module):
- """Compute an ns-package subpath for a filesystem or zipfile importer"""
-
- subpath = os.path.join(path_item, packageName.split('.')[-1])
- normalized = _normalize_cached(subpath)
- for item in module.__path__:
- if _normalize_cached(item)==normalized:
- break
- else:
- # Only return the path if it's not already there
- return subpath
-
-register_namespace_handler(ImpWrapper,file_ns_handler)
-register_namespace_handler(zipimport.zipimporter,file_ns_handler)
-
-
-def null_ns_handler(importer, path_item, packageName, module):
- return None
-
-register_namespace_handler(object,null_ns_handler)
-
-
-def normalize_path(filename):
- """Normalize a file/dir name for comparison purposes"""
- return os.path.normcase(os.path.realpath(filename))
-
-def _normalize_cached(filename,_cache={}):
- try:
- return _cache[filename]
- except KeyError:
- _cache[filename] = result = normalize_path(filename)
- return result
-
-def _set_parent_ns(packageName):
- parts = packageName.split('.')
- name = parts.pop()
- if parts:
- parent = '.'.join(parts)
- setattr(sys.modules[parent], name, sys.modules[packageName])
-
-
-def yield_lines(strs):
- """Yield non-empty/non-comment lines of a ``basestring`` or sequence"""
- if isinstance(strs,basestring):
- for s in strs.splitlines():
- s = s.strip()
- if s and not s.startswith('#'): # skip blank lines/comments
- yield s
- else:
- for ss in strs:
- for s in yield_lines(ss):
- yield s
-
-LINE_END = re.compile(r"\s*(#.*)?$").match # whitespace and comment
-CONTINUE = re.compile(r"\s*\\\s*(#.*)?$").match # line continuation
-DISTRO = re.compile(r"\s*((\w|[-.])+)").match # Distribution or extra
-VERSION = re.compile(r"\s*(<=?|>=?|==|!=)\s*((\w|[-.])+)").match # ver. info
-COMMA = re.compile(r"\s*,").match # comma between items
-OBRACKET = re.compile(r"\s*\[").match
-CBRACKET = re.compile(r"\s*\]").match
-MODULE = re.compile(r"\w+(\.\w+)*$").match
-EGG_NAME = re.compile(
- r"(?P<name>[^-]+)"
- r"( -(?P<ver>[^-]+) (-py(?P<pyver>[^-]+) (-(?P<plat>.+))? )? )?",
- re.VERBOSE | re.IGNORECASE
-).match
-
-component_re = re.compile(r'(\d+ | [a-z]+ | \.| -)', re.VERBOSE)
-replace = {'pre':'c', 'preview':'c','-':'final-','rc':'c','dev':'@'}.get
-
-def _parse_version_parts(s):
- for part in component_re.split(s):
- part = replace(part,part)
- if not part or part=='.':
- continue
- if part[:1] in '0123456789':
- yield part.zfill(8) # pad for numeric comparison
- else:
- yield '*'+part
-
- yield '*final' # ensure that alpha/beta/candidate are before final
-
-def parse_version(s):
- """Convert a version string to a chronologically-sortable key
-
- This is a rough cross between distutils' StrictVersion and LooseVersion;
- if you give it versions that would work with StrictVersion, then it behaves
- the same; otherwise it acts like a slightly-smarter LooseVersion. It is
- *possible* to create pathological version coding schemes that will fool
- this parser, but they should be very rare in practice.
-
- The returned value will be a tuple of strings. Numeric portions of the
- version are padded to 8 digits so they will compare numerically, but
- without relying on how numbers compare relative to strings. Dots are
- dropped, but dashes are retained. Trailing zeros between alpha segments
- or dashes are suppressed, so that e.g. "2.4.0" is considered the same as
- "2.4". Alphanumeric parts are lower-cased.
-
- The algorithm assumes that strings like "-" and any alpha string that
- alphabetically follows "final" represents a "patch level". So, "2.4-1"
- is assumed to be a branch or patch of "2.4", and therefore "2.4.1" is
- considered newer than "2.4-1", which in turn is newer than "2.4".
-
- Strings like "a", "b", "c", "alpha", "beta", "candidate" and so on (that
- come before "final" alphabetically) are assumed to be pre-release versions,
- so that the version "2.4" is considered newer than "2.4a1".
-
- Finally, to handle miscellaneous cases, the strings "pre", "preview", and
- "rc" are treated as if they were "c", i.e. as though they were release
- candidates, and therefore are not as new as a version string that does not
- contain them, and "dev" is replaced with an '@' so that it sorts lower than
- than any other pre-release tag.
- """
- parts = []
- for part in _parse_version_parts(s.lower()):
- if part.startswith('*'):
- if part<'*final': # remove '-' before a prerelease tag
- while parts and parts[-1]=='*final-': parts.pop()
- # remove trailing zeros from each series of numeric parts
- while parts and parts[-1]=='00000000':
- parts.pop()
- parts.append(part)
- return tuple(parts)
-
-class EntryPoint(object):
- """Object representing an advertised importable object"""
-
- def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
- if not MODULE(module_name):
- raise ValueError("Invalid module name", module_name)
- self.name = name
- self.module_name = module_name
- self.attrs = tuple(attrs)
- self.extras = Requirement.parse(("x[%s]" % ','.join(extras))).extras
- self.dist = dist
-
- def __str__(self):
- s = "%s = %s" % (self.name, self.module_name)
- if self.attrs:
- s += ':' + '.'.join(self.attrs)
- if self.extras:
- s += ' [%s]' % ','.join(self.extras)
- return s
-
- def __repr__(self):
- return "EntryPoint.parse(%r)" % str(self)
-
- def load(self, require=True, env=None, installer=None):
- if require: self.require(env, installer)
- entry = __import__(self.module_name, globals(),globals(), ['__name__'])
- for attr in self.attrs:
- try:
- entry = getattr(entry,attr)
- except AttributeError:
- raise ImportError("%r has no %r attribute" % (entry,attr))
- return entry
-
- def require(self, env=None, installer=None):
- if self.extras and not self.dist:
- raise UnknownExtra("Can't require() without a distribution", self)
- map(working_set.add,
- working_set.resolve(self.dist.requires(self.extras),env,installer))
-
-
-
- #@classmethod
- def parse(cls, src, dist=None):
- """Parse a single entry point from string `src`
-
- Entry point syntax follows the form::
-
- name = some.module:some.attr [extra1,extra2]
-
- The entry name and module name are required, but the ``:attrs`` and
- ``[extras]`` parts are optional
- """
- try:
- attrs = extras = ()
- name,value = src.split('=',1)
- if '[' in value:
- value,extras = value.split('[',1)
- req = Requirement.parse("x["+extras)
- if req.specs: raise ValueError
- extras = req.extras
- if ':' in value:
- value,attrs = value.split(':',1)
- if not MODULE(attrs.rstrip()):
- raise ValueError
- attrs = attrs.rstrip().split('.')
- except ValueError:
- raise ValueError(
- "EntryPoint must be in 'name=module:attrs [extras]' format",
- src
- )
- else:
- return cls(name.strip(), value.strip(), attrs, extras, dist)
-
- parse = classmethod(parse)
-
-
-
-
-
-
-
-
- #@classmethod
- def parse_group(cls, group, lines, dist=None):
- """Parse an entry point group"""
- if not MODULE(group):
- raise ValueError("Invalid group name", group)
- this = {}
- for line in yield_lines(lines):
- ep = cls.parse(line, dist)
- if ep.name in this:
- raise ValueError("Duplicate entry point", group, ep.name)
- this[ep.name]=ep
- return this
-
- parse_group = classmethod(parse_group)
-
- #@classmethod
- def parse_map(cls, data, dist=None):
- """Parse a map of entry point groups"""
- if isinstance(data,dict):
- data = data.items()
- else:
- data = split_sections(data)
- maps = {}
- for group, lines in data:
- if group is None:
- if not lines:
- continue
- raise ValueError("Entry points must be listed in groups")
- group = group.strip()
- if group in maps:
- raise ValueError("Duplicate group name", group)
- maps[group] = cls.parse_group(group, lines, dist)
- return maps
-
- parse_map = classmethod(parse_map)
-
-
-
-
-
-
-class Distribution(object):
- """Wrap an actual or potential sys.path entry w/metadata"""
- def __init__(self,
- location=None, metadata=None, project_name=None, version=None,
- py_version=PY_MAJOR, platform=None, precedence = EGG_DIST
- ):
- self.project_name = safe_name(project_name or 'Unknown')
- if version is not None:
- self._version = safe_version(version)
- self.py_version = py_version
- self.platform = platform
- self.location = location
- self.precedence = precedence
- self._provider = metadata or empty_provider
-
- #@classmethod
- def from_location(cls,location,basename,metadata=None,**kw):
- project_name, version, py_version, platform = [None]*4
- basename, ext = os.path.splitext(basename)
- if ext.lower() in (".egg",".egg-info"):
- match = EGG_NAME(basename)
- if match:
- project_name, version, py_version, platform = match.group(
- 'name','ver','pyver','plat'
- )
- return cls(
- location, metadata, project_name=project_name, version=version,
- py_version=py_version, platform=platform, **kw
- )
- from_location = classmethod(from_location)
-
- hashcmp = property(
- lambda self: (
- getattr(self,'parsed_version',()), self.precedence, self.key,
- -len(self.location or ''), self.location, self.py_version,
- self.platform
- )
- )
- def __cmp__(self, other): return cmp(self.hashcmp, other)
- def __hash__(self): return hash(self.hashcmp)
-
- # These properties have to be lazy so that we don't have to load any
- # metadata until/unless it's actually needed. (i.e., some distributions
- # may not know their name or version without loading PKG-INFO)
-
- #@property
- def key(self):
- try:
- return self._key
- except AttributeError:
- self._key = key = self.project_name.lower()
- return key
- key = property(key)
-
- #@property
- def parsed_version(self):
- try:
- return self._parsed_version
- except AttributeError:
- self._parsed_version = pv = parse_version(self.version)
- return pv
-
- parsed_version = property(parsed_version)
-
- #@property
- def version(self):
- try:
- return self._version
- except AttributeError:
- for line in self._get_metadata('PKG-INFO'):
- if line.lower().startswith('version:'):
- self._version = safe_version(line.split(':',1)[1].strip())
- return self._version
- else:
- raise ValueError(
- "Missing 'Version:' header and/or PKG-INFO file", self
- )
- version = property(version)
-
-
-
-
- #@property
- def _dep_map(self):
- try:
- return self.__dep_map
- except AttributeError:
- dm = self.__dep_map = {None: []}
- for name in 'requires.txt', 'depends.txt':
- for extra,reqs in split_sections(self._get_metadata(name)):
- if extra: extra = safe_extra(extra)
- dm.setdefault(extra,[]).extend(parse_requirements(reqs))
- return dm
- _dep_map = property(_dep_map)
-
- def requires(self,extras=()):
- """List of Requirements needed for this distro if `extras` are used"""
- dm = self._dep_map
- deps = []
- deps.extend(dm.get(None,()))
- for ext in extras:
- try:
- deps.extend(dm[safe_extra(ext)])
- except KeyError:
- raise UnknownExtra(
- "%s has no such extra feature %r" % (self, ext)
- )
- return deps
-
- def _get_metadata(self,name):
- if self.has_metadata(name):
- for line in self.get_metadata_lines(name):
- yield line
-
- def activate(self,path=None):
- """Ensure distribution is importable on `path` (default=sys.path)"""
- if path is None: path = sys.path
- self.insert_on(path)
- if path is sys.path:
- fixup_namespace_packages(self.location)
- for pkg in self._get_metadata('namespace_packages.txt'):
- if pkg in sys.modules: declare_namespace(pkg)
-
- def egg_name(self):
- """Return what this distribution's standard .egg filename should be"""
- filename = "%s-%s-py%s" % (
- to_filename(self.project_name), to_filename(self.version),
- self.py_version or PY_MAJOR
- )
-
- if self.platform:
- filename += '-'+self.platform
- return filename
-
- def __repr__(self):
- if self.location:
- return "%s (%s)" % (self,self.location)
- else:
- return str(self)
-
- def __str__(self):
- try: version = getattr(self,'version',None)
- except ValueError: version = None
- version = version or "[unknown version]"
- return "%s %s" % (self.project_name,version)
-
- def __getattr__(self,attr):
- """Delegate all unrecognized public attributes to .metadata provider"""
- if attr.startswith('_'):
- raise AttributeError,attr
- return getattr(self._provider, attr)
-
- #@classmethod
- def from_filename(cls,filename,metadata=None, **kw):
- return cls.from_location(
- _normalize_cached(filename), os.path.basename(filename), metadata,
- **kw
- )
- from_filename = classmethod(from_filename)
-
- def as_requirement(self):
- """Return a ``Requirement`` that matches this distribution exactly"""
- return Requirement.parse('%s==%s' % (self.project_name, self.version))
-
- def load_entry_point(self, group, name):
- """Return the `name` entry point of `group` or raise ImportError"""
- ep = self.get_entry_info(group,name)
- if ep is None:
- raise ImportError("Entry point %r not found" % ((group,name),))
- return ep.load()
-
- def get_entry_map(self, group=None):
- """Return the entry point map for `group`, or the full entry map"""
- try:
- ep_map = self._ep_map
- except AttributeError:
- ep_map = self._ep_map = EntryPoint.parse_map(
- self._get_metadata('entry_points.txt'), self
- )
- if group is not None:
- return ep_map.get(group,{})
- return ep_map
-
- def get_entry_info(self, group, name):
- """Return the EntryPoint object for `group`+`name`, or ``None``"""
- return self.get_entry_map(group).get(name)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- def insert_on(self, path, loc = None):
- """Insert self.location in path before its nearest parent directory"""
-
- loc = loc or self.location
- if not loc:
- return
-
- nloc = _normalize_cached(loc)
- bdir = os.path.dirname(nloc)
- npath= [(p and _normalize_cached(p) or p) for p in path]
-
- bp = None
- for p, item in enumerate(npath):
- if item==nloc:
- break
- elif item==bdir and self.precedence==EGG_DIST:
- # if it's an .egg, give it precedence over its directory
- if path is sys.path:
- self.check_version_conflict()
- path.insert(p, loc)
- npath.insert(p, nloc)
- break
- else:
- if path is sys.path:
- self.check_version_conflict()
- path.append(loc)
- return
-
- # p is the spot where we found or inserted loc; now remove duplicates
- while 1:
- try:
- np = npath.index(nloc, p+1)
- except ValueError:
- break
- else:
- del npath[np], path[np]
- p = np # ha!
-
- return
-
-
- def check_version_conflict(self):
- if self.key=='setuptools':
- return # ignore the inevitable setuptools self-conflicts :(
-
- nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
- loc = normalize_path(self.location)
- for modname in self._get_metadata('top_level.txt'):
- if (modname not in sys.modules or modname in nsp
- or modname in _namespace_packages
- ):
- continue
-
- fn = getattr(sys.modules[modname], '__file__', None)
- if fn and (normalize_path(fn).startswith(loc) or fn.startswith(loc)):
- continue
- issue_warning(
- "Module %s was already imported from %s, but %s is being added"
- " to sys.path" % (modname, fn, self.location),
- )
-
- def has_version(self):
- try:
- self.version
- except ValueError:
- issue_warning("Unbuilt egg for "+repr(self))
- return False
- return True
-
- def clone(self,**kw):
- """Copy this distribution, substituting in any changed keyword args"""
- for attr in (
- 'project_name', 'version', 'py_version', 'platform', 'location',
- 'precedence'
- ):
- kw.setdefault(attr, getattr(self,attr,None))
- kw.setdefault('metadata', self._provider)
- return self.__class__(**kw)
-
-
-
-
- #@property
- def extras(self):
- return [dep for dep in self._dep_map if dep]
- extras = property(extras)
-
-
-def issue_warning(*args,**kw):
- level = 1
- g = globals()
- try:
- # find the first stack frame that is *not* code in
- # the pkg_resources module, to use for the warning
- while sys._getframe(level).f_globals is g:
- level += 1
- except ValueError:
- pass
- from warnings import warn
- warn(stacklevel = level+1, *args, **kw)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-def parse_requirements(strs):
- """Yield ``Requirement`` objects for each specification in `strs`
-
- `strs` must be an instance of ``basestring``, or a (possibly-nested)
- iterable thereof.
- """
- # create a steppable iterator, so we can handle \-continuations
- lines = iter(yield_lines(strs))
-
- def scan_list(ITEM,TERMINATOR,line,p,groups,item_name):
-
- items = []
-
- while not TERMINATOR(line,p):
- if CONTINUE(line,p):
- try:
- line = lines.next(); p = 0
- except StopIteration:
- raise ValueError(
- "\\ must not appear on the last nonblank line"
- )
-
- match = ITEM(line,p)
- if not match:
- raise ValueError("Expected "+item_name+" in",line,"at",line[p:])
-
- items.append(match.group(*groups))
- p = match.end()
-
- match = COMMA(line,p)
- if match:
- p = match.end() # skip the comma
- elif not TERMINATOR(line,p):
- raise ValueError(
- "Expected ',' or end-of-list in",line,"at",line[p:]
- )
-
- match = TERMINATOR(line,p)
- if match: p = match.end() # skip the terminator, if any
- return line, p, items
-
- for line in lines:
- match = DISTRO(line)
- if not match:
- raise ValueError("Missing distribution spec", line)
- project_name = match.group(1)
- p = match.end()
- extras = []
-
- match = OBRACKET(line,p)
- if match:
- p = match.end()
- line, p, extras = scan_list(
- DISTRO, CBRACKET, line, p, (1,), "'extra' name"
- )
-
- line, p, specs = scan_list(VERSION,LINE_END,line,p,(1,2),"version spec")
- specs = [(op,safe_version(val)) for op,val in specs]
- yield Requirement(project_name, specs, extras)
-
-
-def _sort_dists(dists):
- tmp = [(dist.hashcmp,dist) for dist in dists]
- tmp.sort()
- dists[::-1] = [d for hc,d in tmp]
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-class Requirement:
- def __init__(self, project_name, specs, extras):
- """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
- self.unsafe_name, project_name = project_name, safe_name(project_name)
- self.project_name, self.key = project_name, project_name.lower()
- index = [(parse_version(v),state_machine[op],op,v) for op,v in specs]
- index.sort()
- self.specs = [(op,ver) for parsed,trans,op,ver in index]
- self.index, self.extras = index, tuple(map(safe_extra,extras))
- self.hashCmp = (
- self.key, tuple([(op,parsed) for parsed,trans,op,ver in index]),
- frozenset(self.extras)
- )
- self.__hash = hash(self.hashCmp)
-
- def __str__(self):
- specs = ','.join([''.join(s) for s in self.specs])
- extras = ','.join(self.extras)
- if extras: extras = '[%s]' % extras
- return '%s%s%s' % (self.project_name, extras, specs)
-
- def __eq__(self,other):
- return isinstance(other,Requirement) and self.hashCmp==other.hashCmp
-
- def __contains__(self,item):
- if isinstance(item,Distribution):
- if item.key != self.key: return False
- if self.index: item = item.parsed_version # only get if we need it
- elif isinstance(item,basestring):
- item = parse_version(item)
- last = None
- for parsed,trans,op,ver in self.index:
- action = trans[cmp(item,parsed)]
- if action=='F': return False
- elif action=='T': return True
- elif action=='+': last = True
- elif action=='-' or last is None: last = False
- if last is None: last = True # no rules encountered
- return last
-
-
- def __hash__(self):
- return self.__hash
-
- def __repr__(self): return "Requirement.parse(%r)" % str(self)
-
- #@staticmethod
- def parse(s):
- reqs = list(parse_requirements(s))
- if reqs:
- if len(reqs)==1:
- return reqs[0]
- raise ValueError("Expected only one requirement", s)
- raise ValueError("No requirements found", s)
-
- parse = staticmethod(parse)
-
-state_machine = {
- # =><
- '<' : '--T',
- '<=': 'T-T',
- '>' : 'F+F',
- '>=': 'T+F',
- '==': 'T..',
- '!=': 'F++',
-}
-
-
-def _get_mro(cls):
- """Get an mro for a type or classic class"""
- if not isinstance(cls,type):
- class cls(cls,object): pass
- return cls.__mro__[1:]
- return cls.__mro__
-
-def _find_adapter(registry, ob):
- """Return an adapter factory for `ob` from `registry`"""
- for t in _get_mro(getattr(ob, '__class__', type(ob))):
- if t in registry:
- return registry[t]
-
-
-def ensure_directory(path):
- """Ensure that the parent directory of `path` exists"""
- dirname = os.path.dirname(path)
- if not os.path.isdir(dirname):
- os.makedirs(dirname)
-
-def split_sections(s):
- """Split a string or iterable thereof into (section,content) pairs
-
- Each ``section`` is a stripped version of the section header ("[section]")
- and each ``content`` is a list of stripped lines excluding blank lines and
- comment-only lines. If there are any such lines before the first section
- header, they're returned in a first ``section`` of ``None``.
- """
- section = None
- content = []
- for line in yield_lines(s):
- if line.startswith("["):
- if line.endswith("]"):
- if section or content:
- yield section, content
- section = line[1:-1].strip()
- content = []
- else:
- raise ValueError("Invalid section heading", line)
- else:
- content.append(line)
-
- # wrap up last segment
- yield section, content
-
-def _mkstemp(*args,**kw):
- from tempfile import mkstemp
- old_open = os.open
- try:
- os.open = os_open # temporarily bypass sandboxing
- return mkstemp(*args,**kw)
- finally:
- os.open = old_open # and then put it back
-
-
-# Set up global resource manager (deliberately not state-saved)
-_manager = ResourceManager()
-def _initialize(g):
- for name in dir(_manager):
- if not name.startswith('_'):
- g[name] = getattr(_manager, name)
-_initialize(globals())
-
-# Prepare the master working set and make the ``require()`` API available
-__requires__ = None
-_declare_state('object', working_set = WorkingSet())
-try:
- # Does the main program list any requirements?
- from __main__ import __requires__
-except ImportError:
- pass # No: just use the default working set based on sys.path
-else:
- # Yes: ensure the requirements are met, by prefixing sys.path if necessary
- try:
- working_set.require(__requires__)
- except (VersionConflict, DistributionNotFound): # try it without defaults already on sys.path
- working_set = WorkingSet([]) # by starting with an empty path
- try:
- for dist in working_set.resolve(
- parse_requirements(__requires__), Environment()
- ):
- working_set.add(dist)
- except DistributionNotFound:
- pass
- for entry in sys.path: # add any missing entries from sys.path
- if entry not in working_set.entries:
- working_set.add_entry(entry)
- sys.path[:] = working_set.entries # then copy back to sys.path
-
-require = working_set.require
-iter_entry_points = working_set.iter_entry_points
-add_activation_listener = working_set.subscribe
-run_script = working_set.run_script
-run_main = run_script # backward compatibility
-# Activate all distributions already on sys.path, and ensure that
-# all distributions added to the working set in the future (e.g. by
-# calling ``require()``) will get activated as well.
-add_activation_listener(lambda dist: dist.activate())
-working_set.entries=[]; map(working_set.add_entry,sys.path) # match order
-
projects / tahoe-lafs / zfec.git / blobdiff