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3 ��Re�: � @ s� d dl Z ddlmZ ddlmZ ddlmZ e jdddg�ZG d d � d e �Z G d d � d e �Z G d d� de �Z G dd� de �ZG dd� de �ZG dd� de�ZG dd� de�Ze jdd�ZG dd� de �Zdd � Ze jd d �Zd d � ZG d!d"� d"e�ZdS )#� N� )�collections_abc)�AbstractResolver)� DirectedGraph�RequirementInformation� requirement�parentc @ s e Zd ZdZdS )�ResolverExceptionz�A base class for all exceptions raised by this module. Exceptions derived by this class should all be handled in this module. Any bubbling pass the resolver should be treated as a bug. N)�__name__� __module__� __qualname__�__doc__� r r ��/builddir/build/BUILDROOT/alt-python36-pip-20.2.4-5.el9.x86_64/opt/alt/python36/lib/python3.6/site-packages/pip/_vendor/resolvelib/resolvers.pyr s r c s$ e Zd Z� fdd�Zdd� Z� ZS )�RequirementsConflictedc s t t| �j|� || _d S )N)�superr �__init__� criterion)�selfr )� __class__r r r s z RequirementsConflicted.__init__c C s dj djdd� | jj� D ���S )NzRequirements conflict: {}z, c s s | ]}t |�V qd S )N)�repr)�.0�rr r r � <genexpr> s z1RequirementsConflicted.__str__.<locals>.<genexpr>)�format�joinr �iter_requirement)r r r r �__str__ s z RequirementsConflicted.__str__)r r r r r � __classcell__r r )r r r s r c s$ e Zd Z� fdd�Zdd� Z� ZS )�InconsistentCandidatec s" t t| �j||� || _|| _d S )N)r r r � candidater )r r r )r r r r ! s z InconsistentCandidate.__init__c C s$ dj | jdjdd� | jj� D ���S )Nz+Provided candidate {!r} does not satisfy {}z, c s s | ]}t |�V qd S )N)r )r r r r r r ) s z0InconsistentCandidate.__str__.<locals>.<genexpr>)r r r r r )r r r r r & s z InconsistentCandidate.__str__)r r r r r r r r )r r r s r c @ sL e Zd ZdZdd� Zdd� Zedd� �Zdd � Zd d � Z d d � Z dd� Z dS )� CriterionaQ Representation of possible resolution results of a package. This holds three attributes: * `information` is a collection of `RequirementInformation` pairs. Each pair is a requirement contributing to this criterion, and the candidate that provides the requirement. * `incompatibilities` is a collection of all known not-to-work candidates to exclude from consideration. * `candidates` is a collection containing all possible candidates deducted from the union of contributing requirements and known incompatibilities. It should never be empty, except when the criterion is an attribute of a raised `RequirementsConflicted` (in which case it is always empty). .. note:: This class is intended to be externally immutable. **Do not** mutate any of its attribute containers. c C s || _ || _|| _d S )N)� candidates� information�incompatibilities)r r" r# r$ r r r r A s zCriterion.__init__c C s dj dd� | jD ��}dj|�S )Nz, c s s | ]\}}d j ||�V qdS )z({!r}, via={!r})N)r )r �reqr r r r r H s z%Criterion.__repr__.<locals>.<genexpr>z Criterion({}))r r# r )r � requirementsr r r �__repr__F s zCriterion.__repr__c C sF |j |g�}t|tj�s t|�}| |t||�gg d�}|sBt|��|S )z.Build an instance from a requirement. )r" r# r$ )� find_matches� isinstancer �Sequence�listr r )�cls�providerr r r" r r r r �from_requirementM s zCriterion.from_requirementc C s dd� | j D �S )Nc s s | ] }|j V qd S )N)r )r �ir r r r ^ s z-Criterion.iter_requirement.<locals>.<genexpr>)r# )r r r r r ] s zCriterion.iter_requirementc C s dd� | j D �S )Nc s s | ] }|j V qd S )N)r )r r/ r r r r a s z(Criterion.iter_parent.<locals>.<genexpr>)r# )r r r r � iter_parent` s zCriterion.iter_parentc C sh t | j�}|jt||�� |jdd� |D ��}t|tj�sBt |�}t| �||t | j ��}|sdt |��|S )z>Build a new instance from this and a new requirement. c S s g | ] \}}|�qS r r )r r �_r r r � <listcomp>h s z)Criterion.merged_with.<locals>.<listcomp>) r+ r# �appendr r( r) r r* �typer$ r )r r- r r �infosr" r r r r � merged_withc s zCriterion.merged_withc sJ t | j�}|j� � � fdd�| jD �}|s0dS t| �|t | j�|�}|S )z�Build a new instance from this, but excluding specified candidate. Returns the new instance, or None if we still have no valid candidates. c s g | ]}|� kr|�qS r r )r �c)r r r r2 w s z)Criterion.excluded_of.<locals>.<listcomp>N)r+ r$ r3 r" r4 r# )r r Z incompatsr" r r )r r � excluded_ofp s zCriterion.excluded_ofN) r r r r r r' � classmethodr. r r0 r6 r8 r r r r r! - s r! c @ s e Zd ZdS )�ResolutionErrorN)r r r r r r r r: ~ s r: c s e Zd Z� fdd�Z� ZS )�ResolutionImpossiblec s t t| �j|� || _d S )N)r r; r �causes)r r< )r r r r � s z ResolutionImpossible.__init__)r r r r r r r )r r r; � s r; c s e Zd Z� fdd�Z� ZS )�ResolutionTooDeepc s t t| �j|� || _d S )N)r r= r � round_count)r r> )r r r r � s zResolutionTooDeep.__init__)r r r r r r r )r r r= � s r= �Statezmapping criteriac @ sd e Zd ZdZdd� Zedd� �Zdd� Zdd � Zd d � Z d d � Z dd� Z dd� Z dd� Z dd� ZdS )� Resolutionz�Stateful resolution object. This is designed as a one-off object that holds information to kick start the resolution process, and holds the results afterwards. c C s || _ || _g | _d S )N)�_p�_r�_states)r r- �reporterr r r r � s zResolution.__init__c C s, y | j d S tk r& td��Y nX d S )Nr �state���)rC � IndexError�AttributeError)r r r r rE � s zResolution.statec C s\ y| j d }W n$ tk r2 ttj� i d�}Y nX t|jj� |jj� d�}| j j|� dS )z�Push a new state into history. This new state will be used to hold resolution results of the next coming round. r )�mapping�criteriaNrF ) rC rG r? � collections� OrderedDictrI �copyrJ r3 )r �baserE r r r �_push_new_state� s zResolution._push_new_statec C sh | j j||� | jj|�}y| jj| }W n$ tk rN tj| j||�}Y nX |j | j||�}||fS )N) rB Zadding_requirementrA ZidentifyrE rJ �KeyErrorr! r. r6 )r r r �name�critr r r �_merge_into_criterion� s z Resolution._merge_into_criterionc C sF |\}}y| j j| }W n tk r0 d }Y nX | jj||j|j�S )N)rE rI rP rA Zget_preferencer" r# )r �itemrQ r Zpinnedr r r � _get_criterion_item_preference� s z)Resolution._get_criterion_item_preferencec sB y�j j| � W n tk r$ dS X t� �fdd�|j� D ��S )NFc 3 s | ]}�j j|� �V qd S )N)rA �is_satisfied_by)r r )� current_pinr r r r � s z8Resolution._is_current_pin_satisfying.<locals>.<genexpr>)rE rI rP �allr )r rQ r r )rW r r �_is_current_pin_satisfying� s z%Resolution._is_current_pin_satisfyingc C s8 i }x.| j j|�D ] }| j||d�\}}|||< qW |S )N)r )rA Zget_dependenciesrS )r r rJ r rQ rR r r r �_get_criteria_to_update� s z"Resolution._get_criteria_to_updatec s� g }x�|j D ]�� y�j� �}W n0 tk rN } z|j|j� w W Y d d }~X nX t� �fdd�|j� D ��}|szt� |���jj � � �j j j |d � � �j j |< �j j j|� g S W |S )Nc 3 s | ]}�j j|� �V qd S )N)rA rV )r r )r r r r r � s z7Resolution._attempt_to_pin_criterion.<locals>.<genexpr>)r" rZ r r3 r rX r r rB ZpinningrE rI �poprJ �update)r rQ r r< rJ �eZ satisfiedr )r r r �_attempt_to_pin_criterion� s$ z$Resolution._attempt_to_pin_criterionc C s� | j d= x�t| j �dkr�| j j� }y|jj� \}}W n tk rJ w Y nX | jj|� | j� | j j | j |�}|d kr�| j d= q || j j |< dS W dS )Nr � TFrF rF ) rC �lenr[ rI �popitemrP rB Z backtrackingrO rE rJ r8 )r Z prev_staterQ r r r r r � _backtrack� s zResolution._backtrackc sF � j rtd��� j� x^|D ]V}y� j|d d�\}}W n. tk rd } zt|jj��W Y d d }~X nX |� jj |< q W � j j � x�t |�D ]�}� j j |� � j� � j}� fdd�� jj j� D �} | s� j d= � j j|� � jS t| � jd�\}} � j|| �} | �r(� j� } | �s(dd� | D �} t| ��� j j||� q�W t|��d S ) Nzalready resolved)r c s g | ]}� j |� s|�qS r )rY )r rT )r r r r2 4 s z&Resolution.resolve.<locals>.<listcomp>r )�keyc S s g | ]}|j D ]}|�qqS r )r# )r rR r/ r r r r2 K s rF )rC � RuntimeErrorrO rS r r; r r# rE rJ rB Zstarting�rangeZstarting_round�itemsZending�minrU r^ rb Z ending_roundr= )r r& � max_roundsr rQ rR r] Z round_index�currZunsatisfied_criterion_itemsr Zfailure_causes�resultr< r )r r �resolve s> zResolution.resolveN)r r r r r �propertyrE rO rS rU rY rZ r^ rb rk r r r r r@ � s !"r@ c C s� ||kr dS || krdS xn| | j � D ]^}y|t|� }W n tk rP w&Y nX ||krh|j|� dS t| |||�r&|j|� dS q&W dS )NTF)r0 �idrP �add�_has_route_to_root)rJ rc �all_keys� connected�p�pkeyr r r ro T s ro �Resultzmapping graph criteriac s� | j }dd� |j� D �}d |td �< t� }|jd � d h� x�| jj� D ]�\}}t| j||� �s`qF||krr|j|� xV|j� D ]J}y|t|� }W n tk r� w|Y nX ||kr�|j|� |j ||� q|W qFW t � fdd�|j� D �|| jd�S )Nc S s i | ]\}}|t |��qS r )rm )r �k�vr r r � <dictcomp>l s z!_build_result.<locals>.<dictcomp>c s i | ]\}}|� kr||�qS r r )r ru rv )rq r r rw � s )rI �graphrJ ) rI rf rm r rn rJ ro r0 rP �connectrt )rE rI rp rx rc r rr rs r )rq r � _build_resultj s. rz c @ s e Zd ZdZeZddd�ZdS )�Resolverz8The thing that performs the actual resolution work. �d c C s$ t | j| j�}|j||d�}t|�S )a Take a collection of constraints, spit out the resolution result. The return value is a representation to the final resolution result. It is a tuple subclass with three public members: * `mapping`: A dict of resolved candidates. Each key is an identifier of a requirement (as returned by the provider's `identify` method), and the value is the resolved candidate. * `graph`: A `DirectedGraph` instance representing the dependency tree. The vertices are keys of `mapping`, and each edge represents *why* a particular package is included. A special vertex `None` is included to represent parents of user-supplied requirements. * `criteria`: A dict of "criteria" that hold detailed information on how edges in the graph are derived. Each key is an identifier of a requirement, and the value is a `Criterion` instance. The following exceptions may be raised if a resolution cannot be found: * `ResolutionImpossible`: A resolution cannot be found for the given combination of requirements. The `causes` attribute of the exception is a list of (requirement, parent), giving the requirements that could not be satisfied. * `ResolutionTooDeep`: The dependency tree is too deeply nested and the resolver gave up. This is usually caused by a circular dependency, but you can try to resolve this by increasing the `max_rounds` argument. )rh )r@ r- rD rk rz )r r& rh � resolutionrE r r r rk � s zResolver.resolveN)r| )r r r r r Zbase_exceptionrk r r r r r{ � s r{ )rK �compatr Z providersr �structsr � namedtupler � Exceptionr r r �objectr! r: r; r= r? r@ ro rt rz r{ r r r r �<module> s& Q B
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