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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. rN) insert_onr2locationr3rIr:r4rutilscanonicalize_namer5r _added_new)rrr8insertrkeyskeys2normalized_names rrDzWorkingSet.adds   A NN4<N @ @ @ =ME))%44**4="== 48t{22 F $ DH#/;;DHEE=AX)/: 84   KK ! ! ! 85 LL " " " rc t|ddd}i}i}g}t} tjt} |r|d} | |vr| | |s3|| ||||| |} | | j ddd} | | | D],}| | | j | j | |<-d|| <||S)aList 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. NrrT) list _ReqExtras collections defaultdictsetpop markers_pass _resolve_distrVextrasextendrD project_name)r requirementsenv installerreplace_conflictingro processedbest to_activate req_extrasrrrnew_requirementsnew_requirements rrCzWorkingSet.resolves=BL))$$B$/   \\ "-c22  """1%%Ci**377 %%T.Y [D $}}SZ882>     0 1 1 1$4 9 9O,001ABBB.1j ?++!IcN/ "4rc||j}||j|j}|||vr|r|} |5|t|j}ntg}t g} ||| ||x}||j<|&||d} t|| ||||vr+||} t|| | |S)N)ru) rr:r4rlr2rm best_matchrtrrsr) rrrwrursrtrrxrr@r dependent_reqs rrnzWorkingSet._resolve_distAsxx   <;??37++D|C4G;|)$,77 *"oo'^^'*~~Y>>   t $ $ $ s??',M!$,,99-HH H rct|}|i}i}|t|j}||z }n||z}|g} tt | j||D]} || D]} | g} | | ||} tt | j| | t | n$#t$r}||| <|rYd}~Yd}~nd}~wwxYwt|}|||fS)asFind all activatable distributions in `plugin_env` Example usage:: distributions, errors = working_set.find_plugins( Environment(plugin_dirlist) ) # add plugins+libs to sys.path map(working_set.add, distributions) # display errors print('Could not load', errors) The `plugin_env` should be an ``Environment`` instance that contains only distributions that are in the project's "plugin directory" or directories. The `full_env`, if supplied, should be an ``Environment`` contains all currently-available distributions. If `full_env` is not supplied, one is created automatically from the ``WorkingSet`` this method is called on, which will typically mean that every directory on ``sys.path`` will be scanned for distributions. `installer` is a standard installer callback as used by the ``resolve()`` method. The `fallback` flag indicates whether we should attempt to resolve older versions of a plugin if the newest version cannot be resolved. This method returns a 2-tuple: (`distributions`, `error_info`), where `distributions` is a list of the distributions found in `plugin_env` that were loadable, along with any other distributions that are needed to resolve their dependencies. `error_info` is a dictionary mapping unloadable plugin distributions to an exception instance describing the error that occurred. Usually this will be a ``DistributionNotFound`` or ``VersionConflict`` instance. N) rgsortrlr2rmaprDas_requirementrCrr!r"rr)r plugin_envfull_envrtfallbackplugin_projects error_info distributionsrs shadow_setrqrr resolveesr-s r find_pluginszWorkingSet.find_plugins`sFz**   dl++C : CCZ'C^^B''  S & &'''+  L"<0  **,,- * 2 23Y G GIZ^Y77888!((y)A)ABBBE''(Jt$ "]++ j((s$D  D-D((D-c~|t|}|D]}|||S)aEnsure 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. )rCrwrD)rrrneededrs rrWzWorkingSet.requiresC0>>??  D HHTNNNN rcx||jvrdS|j||sdS|D] }||dS)zInvoke `callback` for all distributions If `existing=True` (default), call on all existing ones, as well. N)r6r)rcallbackexistingrs r subscribezWorkingSet.subscribesa t~ % % F h'''  F  D HTNNNN  rc0|jD] }||dSr)r6)rrrs rrazWorkingSet._added_news,  H HTNNNN  rc|jdd|j|j|j|jddfSr)r2r3r3r4r5r6rs rr.zWorkingSet.__getstate__s[ LO O " " K      - 2 2 4 4 N111    rc|\}}}}}|dd|_||_||_||_|dd|_dSr)r2r3r3r4r5r6)r e_k_b_n_cr2rcr4r5r6s rr1zWorkingSet.__setstate__sgIRFv;Yqqqz ))++kkmm ,H,M,M,O,O)"111rr)NTF)NNFN)NNTT)rrrrr9 classmethodrAr>r7rLrr^rXrZrDrCrnrrWrrar.r1rrrrmrmJswNN " " " "[&[* ) ) )1110     >>>+++"F ! HHHHT>Q)Q)Q)Q)f       &&&&&rrmceZdZdZddZdS)rhz> Map each requirement to the extras that demanded it. Ncfd|d|pdzD}j pt|S)z Evaluate markers for req against each extra that demanded it. Return False if the req has a marker and fails evaluation. Otherwise, return True. c3PK|] }jd|iV!dS)extraNmarkerevaluate)rRrrs rrSz*_ReqExtras.markers_pass..sL   J  % 0 1 1      rrr)rrany)rrro extra_evalss ` rrmz_ReqExtras.markers_passs\    #r**f.?@   :~1[!1!11rr)rrrrrmrrrrhrhs2 2 2 2 2 2 2rrhcreZdZdZdeefdZdZdZddZ dZ dZ dd Z dd Z d Zd ZdZdS)rlz5Searchable snapshot of distributions on a search pathNcZi|_||_||_||dS)a!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. ``'3.6'``); 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)_distmaprOpythonscan)r search_pathrOrs rr9zEnvironment.__init__s1&     +rc~|jdup|jdup|j|jk}|ot|j|jS)zIs 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)r py_versionr|rO)rr py_compats rcan_addzEnvironment.can_addsO K4  .$& .$+-  O1$-OOOrcP|j|j|dS)z"Remove `dist` from the environmentN)rr:removerKs rrzEnvironment.remove$s% dh&&t,,,,,rcz| tj}|D])}t|D]}||*dS)adScan `search_path` for distributions usable in this environment Any distributions found are added to the environment. `search_path` should be a sequence of ``sys.path`` items. If not supplied, ``sys.path`` is used. Only distributions conforming to the platform/python version defined at initialization are added. N)rNrrhrD)rrrYrs rrzEnvironment.scan(sW  (K  D*400     rc`|}|j|gS)aReturn a newest-to-oldest list of distributions for `project_name` Uses case-insensitive `project_name` comparison, assuming all the project's distributions use their project's name converted to all lowercase as their key. )lowerrr)rrqdistribution_keys r __getitem__zEnvironment.__getitem__7s/(--//}  !12666rc(||rx|rf|j|jg}||vrD|||tjdddSdSdSdS)zCAdd `dist` if we ``can_add()`` it and it has not already been addedhashcmpT)r:reverseN) r has_versionrrIr:rroperator attrgetter)rrrGs rrDzEnvironment.addBs <<   M$"2"2"4"4 MM,,TXr::E5   T""" x29==t LLLLL  M M M M  rFc ||}n#t$r|sd}YnwxYw||S||jD] }||vr|cS |||S)aFind 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)rrsr:obtain)rrrfrtrurs rr}zEnvironment.best_matchJs ##C((DD   & DDD   KM  Ds{{ {{3 ***s **c | ||SdS)aObtain 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. 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