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j� e� � e� e2 d� � r) e� e2 j� e� � n d� � Z� e� e e� � d� � Z� i d� � Z� d� � Z� d� � Z� d� � Z� d� � Z� e jr d� � j� Z� e jr d� e j� e j� B� j� Z� d; e f d� � � YZ� d� � Z� d� � Z� d9 e f d� � � YZ� d� e� f d� � � YZ� d� e� f d� � � YZ� i e� d� 6e� d� 6e� d� 6Z� d� � Z� d� e� f d� � � YZ� d� � Z� d: e8 j� j� f d� � � YZ� d� � Z� d� � Z� d� � Z� d� � Z� d� � Z� d� � Z� e j� d� d� eQ d� e( �d� � Z� e� e� � d� � � Z� e� d� � � Z� d S(� sZ
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.
i ( t absolute_importN( t get_importer( t six( t urllibt mapt filter( t utime( t mkdirt renamet unlink( t open( t isdirt spliti ( t
py31compat( t appdirs( t packagings& pkg_resources.extern.packaging.versions) pkg_resources.extern.packaging.specifierss+ pkg_resources.extern.packaging.requirementss& pkg_resources.extern.packaging.markersi s Python 3.3 or later is requiredt
PEP440Warningc B@ s e Z d Z RS( sa
Used when there is an issue with a version or specifier not complying with
PEP 440.
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__module__t __doc__( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR n s c C@ s? y t j j | � SWn$ t j j k
r: t j j | � SXd S( N( R t versiont Versiont InvalidVersiont
LegacyVersion( t v( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt
parse_versionu s c K@ s- t � j | � t j t j | | � � d S( N( t globalst updatet _state_varst dictt fromkeys( t vartypet kw( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt _declare_state s c C@ sL i } t � } x6 t j � D]( \ } } | d | | | � | | <q W| S( Nt _sget_( R R t items( t statet gt kR ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __getstate__� s
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| j � S( N( R' ( R+ ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt _sget_object� s c C@ s | j | � d S( N( R) ( R. R/ R$ ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt _sset_object� s c G@ s d S( N( t None( t args( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt <lambda>� t c C@ s{ t � } t j | � } | d k rw t j d k rw y- d d j t � d � | j d � f } Wqw t k
rs qw Xn | S( sZ 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.
t darwins macosx-%s-%st .i i N(
t get_build_platformt macosVersionStringt matchR3 t syst platformt joint _macosx_verst groupt
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t requiret
run_scriptt get_providert get_distributiont load_entry_pointt
get_entry_mapt get_entry_infot iter_entry_pointst resource_stringt resource_streamt resource_filenamet resource_listdirt resource_existst resource_isdirt declare_namespacet working_sett add_activation_listenert find_distributionst set_extraction_patht cleanup_resourcest get_default_cachet Environmentt
WorkingSett ResourceManagert Distributiont Requirementt
EntryPointt ResolutionErrort VersionConflictt DistributionNotFoundt UnknownExtrat ExtractionErrort parse_requirementsR t safe_namet safe_versiont get_platformt compatible_platformst yield_linest split_sectionst
safe_extrat to_filenamet invalid_markert evaluate_markert ensure_directoryt normalize_patht EGG_DISTt BINARY_DISTt SOURCE_DISTt
CHECKOUT_DISTt DEVELOP_DISTt IMetadataProvidert IResourceProvidert FileMetadatat PathMetadatat EggMetadatat
EmptyProvidert empty_providert NullProvidert EggProvidert DefaultProvidert ZipProvidert register_findert register_namespace_handlert register_loader_typet fixup_namespace_packagesR t run_maint AvailableDistributionsc B@ s e Z d Z d � Z RS( s. Abstract base for dependency resolution errorsc C@ s | j j t | j � S( N( t __class__R t reprR4 ( t self( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __repr__� s ( R R R R� ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR` � s c B@ sD e Z d Z d Z e d � � Z e d � � Z d � Z d � Z RS( s�
An already-installed version conflicts with the requested version.
Should be initialized with the installed Distribution and the requested
Requirement.
s3 {self.dist} is installed but {self.req} is requiredc C@ s | j d S( Ni ( R4 ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt dist� s c C@ s | j d S( Ni ( R4 ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt req s c C@ s | j j t � � S( N( t _templatet formatt locals( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt report s c C@ s$ | s
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If required_by is non-empty, return a version of self that is a
ContextualVersionConflict.
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A VersionConflict that accepts a third parameter, the set of the
requirements that required the installed Distribution.
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c B@ sS e Z d Z d Z e d � � Z e d � � Z e d � � Z d � Z d � Z RS( s& A requested distribution was not foundsS The '{self.req}' distribution was not found and is required by {self.requirers_str}c C@ s | j d S( Ni ( R4 ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� ( s c C@ s | j d S( Ni ( R4 ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt requirers, s c C@ s | j s
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R R R R� R� R� R� R� R� R� ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRb " s c B@ s e Z d Z RS( s> Distribution doesn't have an "extra feature" of the given name( R R R ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRc = s i i����c C@ s | t | <d S( s 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.
N( t _provider_factories( t loader_typet provider_factory( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� K s c C@ s� t | t � r2 t j | � p1 t t | � � d Sy t j | } Wn( t k
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c C@ s� | s� t j � d } | d k rz d } t j j | � rz t t d � rw t j | � } d | k rt | d } qt qw qz n | j | j d � � n | d S( Ni R6 s0 /System/Library/CoreServices/SystemVersion.plistt readPlistt ProductVersionR8 (
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plist_content( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR? b s c C@ s i d d 6d d 6j | | � S( Nt ppct PowerPCt Power_Macintosh( t get( t machine( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt _macosx_archr s c C@ s� y d d l m } Wn! t k
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s� 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.
i ( Rh R7 s macosx-i t t _s macosx-%d.%d-%si ( t sysconfigRh t ImportErrort distutils.utilR< R= t
startswithR? R� t unamet replacet intR� RA ( Rh RB R R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR9 v s
s macosx-(\d+)\.(\d+)-(.*)s darwin-(\d+)\.(\d+)\.(\d+)-(.*)c C@ sO | d k s$ | d k s$ | | k r( t St j | � } | rKt j | � } | s� t j | � } | r� t | j d � � } d | j d � | j d � f } | d k r� | d k s� | d k r� | d k r� t Sn t S| j d � | j d � k s| j d � | j d � k rt St | j d � � t | j d � � k rGt St St S(
s� 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.
i s %s.%si i s 10.3i s 10.4i N( R3 t TrueR: R; t darwinVersionStringR� R@ t False( t providedt requiredt reqMact provMact
provDarwint dversiont macosversion( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRi � s* $" *c C@ sN t j d � j } | d } | j � | | d <t | � d j | | � d S( s@ Locate distribution `dist_spec` and run its `script_name` scripti R i N( R< t _getframet f_globalsR- RE RF ( t dist_spect script_namet nst name( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRF � s
c C@ sg t | t j � r$ t j | � } n t | t � rB t | � } n t | t � sc t d | � � n | S( s@ Return a current distribution object for a Requirement or strings- Expected string, Requirement, or Distribution( R� R t string_typesR^ t parseRG R] t TypeError( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRH � s c C@ s t | � j | | � S( sD Return `name` entry point of `group` for `dist` or raise ImportError( RH RI ( R� R@ R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRI � s c C@ s t | � j | � S( s= Return the entry point map for `group`, or the full entry map( RH RJ ( R� R@ ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRJ � s c C@ s t | � j | | � S( s< Return the EntryPoint object for `group`+`name`, or ``None``( RH RK ( R� R@ R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRK � s c B@ s> e Z d � Z d � Z d � Z d � Z d � Z d � Z RS( c C@ s d S( s; Does the package's distribution contain the named metadata?N( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt has_metadata� R6 c C@ s d S( s' The named metadata resource as a stringN( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt get_metadata� R6 c C@ s d S( s� 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.N( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt get_metadata_lines� R6 c C@ s d S( s> Is the named metadata a directory? (like ``os.path.isdir()``)N( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt metadata_isdir� R6 c C@ s d S( s? List of metadata names in the directory (like ``os.listdir()``)N( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt metadata_listdir� R6 c C@ s d S( s= Execute the named script in the supplied namespace dictionaryN( ( R� t namespace( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRF R6 ( R R R� R� R� R� R� RF ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRw � s c B@ sD e Z d Z d � Z d � Z d � Z d � Z d � Z d � Z RS( s3 An object that provides access to package resourcesc C@ s d S( sd Return a true filesystem path for `resource_name`
`manager` must be an ``IResourceManager``N( ( t managert
resource_name( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt get_resource_filename R6 c C@ s d S( si Return a readable file-like object for `resource_name`
`manager` must be an ``IResourceManager``N( ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt get_resource_stream R6 c C@ s d S( sm Return a string containing the contents of `resource_name`
`manager` must be an ``IResourceManager``N( ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt get_resource_string R6 c C@ s d S( s, Does the package contain the named resource?N( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt has_resource R6 c C@ s d S( s> Is the named resource a directory? (like ``os.path.isdir()``)N( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRR R6 c C@ s d S( s? List of resource names in the directory (like ``os.listdir()``)N( ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRP R6 ( R R R R� R� R� R� RR RP ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRx s c B@ s� e Z d Z d d � Z e d � � Z e d � � Z d � Z d � Z d � Z
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� Z e d � Z d � Z d � Z d � Z RS( sD A collection of active distributions on sys.path (or a similar list)c C@ s^ g | _ i | _ i | _ g | _ | d k r< t j } n x | D] } | j | � qC Wd S( s? Create working set from list of path entries (default=sys.path)N( t entriest
entry_keyst by_keyt callbacksR3 R< R� t add_entry( R� R� t entry( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __init__# s
c C@ se | � } y d d l m } Wn t k
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Prepare the master working set.
i ( t __requires__( t __main__R� R� RE Ra t _build_from_requirements( t clst wsR� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt
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Build a working set from a requirement spec. Rewrites sys.path.
( Re t resolveRZ t addR< R� R� R� ( R� t req_specR� t reqst distsR� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� D s
c C@ sT | j j | g � | j j | � x* t | t � D] } | j | | t � q3 Wd S( s� 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``.)
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c C@ s | j j | j � | k S( s9 True if `dist` is the active distribution for its project( R� R� R. ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __contains__i s c C@ sC | j j | j � } | d k r? | | k r? t | | � � n | S( s� Find a distribution matching requirement `req`
If there is an active distribution for the requested project, this
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If there is no active distribution for the requested project, ``None``
is returned.
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c c@ sg x` | D]X } | j | � } | d k rG x4 | j � D] } | Vq5 Wq | | k r | | Vq q Wd S( s 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).
N( RJ R3 t values( R� R@ R� R� R� t ep( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRL } s
c C@ sQ t j d � j } | d } | j � | | d <| j | � d j | | � d S( s? Locate distribution for `requires` and run `script_name` scripti R i N( R< R� R� R- RE RF ( R� t requiresR� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRF � s
c c@ sp i } xc | j D]X } | | j k r+ q n x: | j | D]+ } | | k r9 d | | <| j | Vq9 q9 Wq Wd S( s� 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.
i N( R� R� R� ( R� t seent itemR. ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __iter__� s
c C@ s� | r" | j | j | d | �n | d k r: | j } n | j j | g � } | j j | j g � } | r� | j | j k r� d S| | j | j <| j | k r� | j | j � n | j | k r� | j | j � n | j | � d S( s 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, unless `replace=True`.
If it's added, any callbacks registered with the ``subscribe()`` method
will be called.
R� N(
t insert_onR� R3 t locationR� R� R. R� R� t
_added_new( R� R� R� t insertR� t keyst keys2( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s+ t | � d d d � } i } i } g } t � } t j t � }
x�| r&| j d � } | | k rm qF n | j | | � s� qF n | j | j � } | d k r�| j
j | j � } | d k s� | | k rz| rz| }
| d k r!| d k rt | j � } q!t g � } t
g � }
n | j | |
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j | d � } t | | � � qzn | j | � n | | k r�|
| } t | | � j | � � n | j | j � d d d � } | j | � x/ | D]' } |
| j | j � | j | | <q�Wt | | <qF W| S( s� 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``.
Unless `replace_conflicting=True`, raises a VersionConflict exception
if
any requirements are found on the path that have the correct name but
the wrong version. Otherwise, if an `installer` is supplied it will be
invoked to obtain the correct version of the requirement and activate
it.
`extras` is a list of the extras to be used with these requirements.
This is important because extra requirements may look like `my_req;
extra = "my_extra"`, which would otherwise be interpreted as a purely
optional requirement. Instead, we want to be able to assert that these
requirements are truly required.
Ni����i t replace_conflicting( t listt
_ReqExtrast collectionst defaultdictt sett popt markers_passR� R. R3 R� RZ R� R[ t
best_matchRb R� Ra R� R� t extrast extendR� t project_nameR� ( R� t requirementst envt installerR R t processedt bestt to_activatet
req_extrasR� R� R� R� R� t
dependent_reqt new_requirementst new_requirement( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � sN
c C@ sA t | � } | j � i } i } | d k rJ t | j � } | | 7} n
| | } | j g � } t t | j | � � x� | D]� }
x� | |
D]� } | j � g } y | j | | | � }
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r� } | | | <| r� q� qPq� Xt t | j |
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|
� � Pq� Wq� Wt | � } | j � | | f S( ss Find all activatable distributions in `plugin_env`
Example usage::
distributions, errors = working_set.find_plugins(
Environment(plugin_dirlist)
)
# add plugins+libs to sys.path
map(working_set.add, distributions)
# display errors
print('Could not load', 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.
N( R t sortR3 RZ R� R� R R� t as_requirementR� R` R R R ( R� t
plugin_envt full_envR t fallbackt plugin_projectst
error_infot
distributionsR t
shadow_setR
R� R� t resolveesR ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt find_plugins s4 $
c G@ s7 | j t | � � } x | D] } | j | � q W| S( s� 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.
( R� Re R� ( R� R t neededR� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRE s s
c C@ sL | | j k r d S| j j | � | s- d Sx | D] } | | � q4 Wd S( s� Invoke `callback` for all distributions
If `existing=True` (default),
call on all existing ones, as well.
N( R� R� ( R� t callbackt existingR� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt subscribe� s
c C@ s" x | j D] } | | � q
Wd S( N( R� ( R� R� R$ ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s* | j | j j � | j j � | j f S( N( R� R� R* R� R� ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR' � s c C@ sH | \ } } } } | | _ | j � | _ | j � | _ | | _ d S( N( R� R* R� R� R� ( R� t e_k_b_cR� R R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR) � s
N( R R R R3 R� t classmethodR� R� R� R� R� RL RF R� R� R� R� R� R" RE R& R� R' R) ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR[ s&
\S R c B@ s e Z d Z d d � Z RS( s>
Map each requirement to the extras that demanded it.
c @ s@ � f d � | j � d � | p$ d D� } � j p? t | � S( s�
Evaluate markers for req against each extra that
demanded it.
Return False if the req has a marker and fails
evaluation. Otherwise, return True.
c 3@ s( | ] } � j j i | d 6� Vq d S( t extraN( t markert evaluate( t .0R) ( R� ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pys <genexpr>� s ( N( N( R� R3 R* t any( R� R� R t extra_evals( ( R� s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR � s N( R R R R3 R ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR � s c B@ s� e Z d Z d e � e d � Z d � Z d � Z d d � Z d � Z
d � Z d e d � Z
d d � Z d � Z d
� Z d � Z RS(
s5 Searchable snapshot of distributions on a search pathc C@ s, i | _ | | _ | | _ | j | � d S( s! 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. ``'3.3'``);
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.
N( t _distmapR= t pythont scan( R� t search_pathR= R0 ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ sI | j d k p- | j d k p- | j | j k } | oH t | j | j � S( s� 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.
N( R0 R3 t
py_versionRi R= ( R� R� t py_compat( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt can_add� s c C@ s | j | j j | � d S( s" Remove `dist` from the environmentN( R/ R. t remove( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR6 � s c C@ sQ | d k r t j } n x2 | D]* } x! t | � D] } | j | � q2 Wq Wd S( sd 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.
N( R3 R< R� RV R� ( R� R2 R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR1 � s
c C@ s | j � } | j j | g � S( s Return a newest-to-oldest list of distributions for `project_name`
Uses case-insensitive `project_name` comparison, assuming all the
project's distributions use their project's name converted to all
lowercase as their key.
( t lowerR/ R� ( R� R
t distribution_key( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __getitem__� s c C@ su | j | � rq | j � rq | j j | j g � } | | k rq | j | � | j d t j d � d t � qq n d S( sL Add `dist` if we ``can_add()`` it and it has not already been added
R. t hashcmpt reverseN(
R5 t has_versionR/ R� R. R� R t operatort
attrgetterR� ( R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s
c C@ s� y | j | � } Wn# t k
r8 | s/ � n d } n X| d k rI | Sx% | | j D] } | | k rW | SqW W| j | | � S( s� 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 distribution in the
environment that meets the ``Requirement`` in `req`. If no suitable
distribution is found, and `installer` is supplied, then the result of
calling the environment's ``obtain(req, installer)`` method will be
returned.
N( R� Ra R3 R. t obtain( R� R� RT R R R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR
s
c C@ s | d k r | | � Sd S( s� 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.N( R3 ( R� t requirementR ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR? # s c c@ s0 x) | j j � D] } | | r | Vq q Wd S( s= Yield the unique project names of the available distributionsN( R/ R ( R� R. ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� / s
c C@ s{ t | t � r | j | � nX t | t � rd xF | D]( } x | | D] } | j | � qF Wq5 Wn t d | f � � | S( s2 In-place addition of a distribution or environments Can't add %r to environment( R� R] R� RZ R� ( R� t othert projectR� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __iadd__5 s
c C@ s@ | j g d d d d �} x | | f D] } | | 7} q( W| S( s4 Add an environment or distribution to an environmentR= R0 N( R� R3 ( R� RA t newR ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __add__A s N( R R R R3 RD t PY_MAJORR� R5 R6 R1 R9 R� R� R
R? R� RC RE ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRZ � s
c B@ s e Z d Z RS( sT 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
( R R R ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRd M s
c B@ s� e Z d Z d Z d � Z d � Z d � Z d � Z d � Z d � Z
d � Z d � Z d d � Z
e d
� � Z d � Z d � Z e d
� Z RS( s' Manage resource extraction and packagesc C@ s
i | _ d S( N( t cached_files( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� a s c C@ s t | � j | � S( s Does the named resource exist?( RG R� ( R� t package_or_requirementR� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRQ d s c C@ s t | � j | � S( s, Is the named resource an existing directory?( RG RR ( R� RH R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRR h s c C@ s t | � j | | � S( s4 Return a true filesystem path for specified resource( RG R� ( R� RH R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRO n s c C@ s t | � j | | � S( s9 Return a readable file-like object for specified resource( RG R� ( R� RH R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRN t s c C@ s t | � j | | � S( s% Return specified resource as a string( RG R� ( R� RH R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRM z s c C@ s t | � j | � S( s1 List the contents of the named resource directory( RG RP ( R� RH R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRP � s c C@ st t j � d } | j p t � } t j d � j � } t | j t � � � } | | _
| | _ | | _ | � d S( s5 Give an error message for problems extracting file(s)i s
Can't extract file(s) to egg cache
The following error occurred while trying to extract file(s)
to the Python egg cache:
{old_exc}
The Python egg cache directory is currently set to:
{cache_path}
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.
N(
R< t exc_infot extraction_pathRY t textwrapt dedentt lstripRd R� R� R� t
cache_patht original_error( R� t old_excRN t tmplt err( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt extraction_error� s c C@ sx | j p t � } t j j | | d | � } y t | � Wn t k
rY | j � n X| j | � d | j | <| S( s� 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.
s -tmpi (
RJ RY R� R� R> t _bypass_ensure_directoryt ExceptionRS t _warn_unsafe_extraction_pathRG ( R� t archive_namet namest extract_patht target_path( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt get_cache_path� s
c C@ sw t j d k r* | j t j d � r* d St j | � j } | t j @sV | t j @rs d | } t j | t
� n d S( sN
If the default extraction path is overridden and set to an insecure
location, such as /tmp, it opens up an opportunity for an attacker to
replace an extracted file with an unauthorized payload. Warn the user
if a known insecure location is used.
See Distribute #375 for more details.
t ntt windirNs� %s is writable by group/others and vulnerable to attack when used with get_resource_filename. Consider a more secure location (set with .set_extraction_path or the PYTHON_EGG_CACHE environment variable).( R� R� R� t environt statt st_modet S_IWOTHt S_IWGRPt warningst warnt UserWarning( R� t modet msg( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRV � s
&c C@ s@ t j d k r< t j | � j d Bd @} t j | | � n d S( s4 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.
t posixim i� N( R� R� R_ R` t chmod( R� t tempnamet filenameRf ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt postprocess� s c C@ s% | j r t d � � n | | _ d S( s� 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()``.)
s5 Can't change extraction path, files already extractedN( RG RA RJ ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRW � s c C@ s d S( sB
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.
N( ( R� t force( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRX R6 N( ( R R R R3 RJ R� RQ RR RO RN RM RP RS R[ t staticmethodRV Rl RW R� RX ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR\ ] s c C@ s" t j j d � p! t j d d � S( s�
Return the ``PYTHON_EGG_CACHE`` environment variable
or a platform-relevant user cache dir for an app
named "Python-Eggs".
t PYTHON_EGG_CACHEt appnames Python-Eggs( R� R^ R� R t user_cache_dir( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRY s c C@ s t j d d | � S( s� Convert an arbitrary string to a standard distribution name
Any runs of non-alphanumeric/. characters are replaced with a single '-'.
s [^A-Za-z0-9.]+t -( t ret sub( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRf s c C@ sZ y t t j j | � � SWn9 t j j k
rU | j d d � } t j d d | � SXd S( sB
Convert an arbitrary string to a standard version string
R� R8 s [^A-Za-z0-9.]+Rr N( R� R R R R R� Rs Rt ( R ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRg % s
c C@ s t j d d | � j � S( s� 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.
s [^A-Za-z0-9.-]+R� ( Rs Rt R7 ( R) ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRl 1 s c C@ s | j d d � S( s| Convert a project or version name to its filename-escaped form
Any '-' characters are currently replaced with '_'.
Rr R� ( R� ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRm : s c C@ s; y t | � Wn& t k
r6 } d | _ d | _ | SXt S( so
Validate text as a PEP 508 environment marker; return an exception
if invalid or False otherwise.
N( Ro t SyntaxErrorR3 Rk t linenoR� ( t textt e( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRn B s c C@ sL y t j j | � } | j � SWn% t j j k
rG } t | � � n Xd S( s�
Evaluate a PEP 508 environment marker.
Return a boolean indicating the marker result in this environment.
Raise SyntaxError if marker is invalid.
This implementation uses the 'pyparsing' module.
N( R t markerst MarkerR+ t
InvalidMarkerRu ( Rw R) R* Rx ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRo P s
c B@ s� e Z d Z d Z d Z d Z d � Z d � Z d � Z d � Z
d � Z d � Z d � Z
d � Z d � Z d
� Z d � Z d � Z d
� Z d � Z d � Z d � Z d � Z d � Z RS( sE Try to implement resources and metadata for arbitrary PEP 302 loadersc C@ s: t | d d � | _ t j j t | d d � � | _ d S( NR� t __file__R6 ( R� R3 R� R� R� t dirnamet module_path( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� f s c C@ s | j | j | � S( N( t _fnR~ ( R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� j s c C@ s t j | j | | � � S( N( t iot BytesIOR� ( R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� m s c C@ s | j | j | j | � � S( N( t _getR R~ ( R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� p s c C@ s | j | j | j | � � S( N( t _hasR R~ ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� s s c C@ s% | j o$ | j | j | j | � � S( N( t egg_infoR� R ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� v s c C@ sE | j s
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%c C@ s t d � � d S( Ns9 Can't perform this operation for unregistered loader type( t NotImplementedError( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s t d � � d S( Ns9 Can't perform this operation for unregistered loader type( R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s t d � � d S( Ns9 Can't perform this operation for unregistered loader type( R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s& | r" t j j | | j d � � S| S( Nt /( R� R� R> R ( R� t baseR� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR � s c C@ s2 t | j d � r" | j j | � St d � � d S( Nt get_datas= Can't perform this operation for loaders without 'get_data()'( R� R� R� R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s N( R R R R3 t egg_nameR� R� R� R� R� R� R� R� R� R� RR R� RP R� RF R� R� R� R R� ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR~ _ s, c B@ s e Z d Z d � Z d � Z RS( s& Provider based on a virtual filesystemc C@ s t j | | � | j � d S( N( R~ R� t
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t ZipManifestsc B@ s# e Z d Z e d � � Z e Z RS( s
zip manifest builder
c @ sB t j | � �- � � f d � � j � D� } t | � SWd QXd S( s
Build a dictionary similar to the zipimport directory
caches, except instead of tuples, store ZipInfo objects.
Use a platform-specific path separator (os.sep) for the path keys
for compatibility with pypy on Windows.
c 3@ s3 | ]) } | j d t j � � j | � f Vq d S( R� N( R� R� t sept getinfo( R, R� ( t zfile( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pys <genexpr> s N( t zipfilet ZipFilet namelistR ( R� R� R# ( ( R� s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt build s ( R R R R( R� t load( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� s t MemoizedZipManifestsc B@ s) e Z d Z e j d d � Z d � Z RS( s%
Memoized zipfile manifests.
t manifest_mods manifest mtimec C@ sv t j j | � } t j | � j } | | k sC | | j | k rk | j | � } | j | | � | | <n | | j S( sW
Load a manifest at path or return a suitable manifest already loaded.
( R� R� t normpathR_ t st_mtimet mtimeR� R� t manifest( R� R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� 1 s ( R R R R t
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!c C@ s | j j | j j � S( N( t _zip_manifestsR� R� R� ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt zipinfo_ s c C@ s� | j s t d � � n | j | � } | j � } d j | j | � � | k r~ x* | D] } | j | | j | � � qX Wn | j | | � S( Ns5 resource_filename() only supported for .egg, not .zipR� ( R� R� t _resource_to_zipt _get_eager_resourcesR> R� t _extract_resourcet
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c C@ s. | j | � } | | j k p- | | j � k S( N( R� R� R� ( R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s | j | � | j � k S( N( R� R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s% t | j � j | j | � d � � S( N( ( R R� R� R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s | j | j | j | � � S( N( R� R R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s | j | j | j | � � S( N( R� R R~ ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s N( R R R R3 R� R� R� R� R� R� R� R� R� Rn R� R� R� R� R� R� R� R� R� R� ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� ? s$
7 c B@ s; e Z d Z d � Z d � Z d � Z d � Z d � Z RS( s* 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.
c C@ s
| | _ d S( N( R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s | d k o t j j | j � S( Ns PKG-INFO( R� R� R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� � s c C@ s_ | d k r t d � � n t j | j d d d d �� } | j � } Wd QX| j | � | S( Ns PKG-INFOs( No metadata except PKG-INFO is availablet encodings utf-8t errorsR� ( R� R� R
R� R� t _warn_on_replacement( R� R� R� t metadata( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� s !
c C@ sG d j d � } | | k rC d } | j t � � } t j | � n d S( Ns �s utf-8s2 {self.path} could not be properly decoded in UTF-8( R� R� R� Rc Rd ( R� R� t replacement_charRQ Rg ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� s
c C@ s t | j | � � S( N( Rj R� ( R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� s ( R R R R� R� R� R� R� ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRy � s
c B@ s e Z d Z d � Z RS( ss 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)
c C@ s | | _ | | _ d S( N( R~ R� ( R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� ) s ( R R R R� ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRz s c B@ s e Z d Z d � Z RS( s Metadata provider for .egg filesc C@ s` | j t j | _ | | _ | j rF t j j | j | j � | _ n | j | _ | j � d S( s- Create a metadata provider from a zipimporterN(
R� R� R� R� R� t prefixR� R> R~ R� ( R� t importer( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� 1 s ! ( R R R R� ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR{ . s R t _distribution_findersc C@ s | t | <d S( sx 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.N( R� ( t
importer_typet distribution_finder( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� @ s c C@ s+ t | � } t t | � } | | | | � S( s. Yield distributions accessible via `path_item`( R R� R� ( t path_itemt onlyR� t finder( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyRV J s c c@ s! | j j d � r d St | � } | j d � rH t j | d | �Vn | rR d Sx� | j d � D]� } t | � r� t j j
| | � } t t j
| � | � } xu | D] } | Vq� Wqb | j � j d � rb t j j
| | � } t t j
| � � } | | _ t j | | | � Vqb qb Wd S( s@
Find eggs in zip files; possibly multiple nested eggs.
s .whlNs PKG-INFOR� R� s
.dist-info( R� t endswithR{ R� R] t
from_filenameRP R� R� R� R> t find_eggs_in_zipt zipimportt zipimporterR7 R� t
from_location( R� R� R� R� t subitemt subpathR� R� t submeta( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR� Q s$
c C@ s d S( N( ( ( R� R� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt find_nothingo s c C@ s d � } t | d | d t �S( sL
Given a list of filenames, return them in descending order
by version number.
>>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
>>> _by_version_descending(names)
['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
>>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
>>> _by_version_descending(names)
['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
>>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
>>> _by_version_descending(names)
['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
c S@ sY t j j | � \ } } t j | j d � | g � } g | D] } t j j | � ^ q= S( s6
Parse each component of the filename
Rr ( R� R� t splitextt itertoolst chainR R R R� ( R� t extR� t part( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt _by_version� s R. R; ( t sortedR� ( RX R ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt _by_version_descendingv s c
#@ s� t � � � t � � rH t j � d t � t j j � d � � �Vd St � � } � � f d � | D� } t | � } xQ | D]I } t j j � | � } t
� | � � } x | | � D] } | Vq� Wq� Wd S( s6 Yield distributions accessible on a sys.path directoryR� s EGG-INFONc 3@ s' | ] } t � | � � r | Vq d S( N( t dist_factory( R, R� ( R� R� ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pys <genexpr>� s ( t _normalize_cachedt _is_unpacked_eggR] R� Rz R� R� R> t safe_listdirR R (
R� R� R� R� t filteredt path_item_entriesR� t fullpatht factoryR� ( ( R� R� s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt find_on_path� s
c C@ sf | j � } t t | j d � � } | r. t S| rE t | � rE t S| r_ | j d � r_ t St � S( s9
Return a dist_factory for a path_item and entry
s .egg-infos
.dist-infos .egg-link( s .egg-infos
.dist-info( R7 R- R R� t distributions_from_metadataR� RV t resolve_egg_linkt NoDists( R� R� R� R7 t is_meta( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR � s
R c B@ s2 e Z d Z d � Z e j r' e Z n d � Z RS( sS
>>> bool(NoDists())
False
>>> list(NoDists()('anything'))
[]
c C@ s t S( N( R� ( R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __bool__� s c C@ s
t d � S( N( ( t iter( R� R ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyt __call__� s ( R R R R R t PY2t __nonzero__R ( ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR � s
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r� } | j t j t j t j f k po t | d d � d k } | s� � q� n Xd S( sI
Attempt to list contents of path, but suppress some exceptions.
t winerrori N( ( R� R� t PermissionErrort NotADirectoryErrort OSErrort errnot ENOTDIRt EACCESt ENOENTR� R3 ( R� Rx t ignorable( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR � s !
c c@ s� t j j | � } t j j | � rU t t j | � � d k rC d St | | � } n t | � } t j j | � } t j
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precedence( R� R� R} R R� R� Rz Ry R� R] R� Rv ( R� t rootR� R� ( ( s: /usr/lib/python2.7/site-packages/pkg_resources/__init__.pyR � s c c@ sD t | � �2 } x( | D] } | j � } | r | Vq q WWd QXd S( s1
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