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Y dS X �j| jdd�sDdS �j| � �d�}t|��krddS |S )z6Get the candidate for the currently-installed version.NT)� prereleases)rZ r{ r� )rb rj r} �containsr� r� r| )�installed_distr )r{ r� r� rk r� r� rD rE �_get_installed_candidate s � z@Factory._iter_found_candidates.<locals>._get_installed_candidatec 3 s� �j j���d�} t| �� �}tdd� |D ��}ttd�dd�}|��}t|�D ]>}|r\|sf|jj rfqPt j �j |j� ��|j d�}|j |fV qPd S )N)� project_namer� r� c s s | ]}|j jV qd S ro )rq � is_yanked)rY �icanrD rD rE � <genexpr># s zUFactory._iter_found_candidates.<locals>.iter_index_candidate_infos.<locals>.<genexpr>�r� rW c S s< | D ]2}|j dkr dS |j dkr$q|j�d�r2q dS dS )Nz===T�==z.*F)�operatorr� �endswith)r� �sprD rD rE � is_pinned% s zUFactory._iter_found_candidates.<locals>.iter_index_candidate_infos.<locals>.is_pinned)rq r{ r� r� r� )r] �find_best_candidate�list�iter_applicable�allr �bool�reversedrq r� � functools�partialr� r� )�result�icans� all_yankedr� �pinnedr� �func)r{ r� r� rk r� r� rD rE �iter_index_candidate_infos s* � �zBFactory._iter_found_candidates.<locals>.iter_index_candidate_infos) �req�AssertionErrorr r� � frozensetr� r� r{ r r+ r r7 r6 ) rk r� r� r� r� r� �ireqr� r� rD )r{ r� r� r� rk r� r� rE �_iter_found_candidates� s& (�z Factory._iter_found_candidates)�base_requirementsr{ rW c c sJ |D ]@}|� � \}}|dkr qt|�}|dk s6td��| �||�V qdS )a8 Produce explicit candidates from the base given an extra-ed package. :param base_requirements: Requirements known to the resolver. The requirements are guaranteed to not have extras. :param extras: The extras to inject into the explicit requirements' candidates. Nzno extras here)�get_candidate_lookupr5 r� r� )rk r� r{ r� � lookup_cand�_� base_candrD rD rE �#_iter_explicit_candidates_from_baseG s z+Factory._iter_explicit_candidates_from_base)� identifier� constraintr� rW c c sD |j D ]8}| �|� | j|t� t||�t|�dd�}|r|V qdS )z�Produce explicit candidates from constraints. This creates "fake" InstallRequirement objects that are basically clones of what "should" be the template, but with original_link set to link. N�r{ r� r� r� )�linksry r� r� r" r )rk r� r� r� rq r rD rD rE �!_iter_candidates_from_constraints] s �z)Factory._iter_candidates_from_constraints)r� rH �incompatibilitiesr� r� rW c s t � }g }�� D ]4}|�� \} } | d k r4|�| � | d k r|�| � qt�t��0 t��} |�| � �� | j d�t | j ��� W 5 Q R X |r�z |�| j�� |d d�� W n tk r� Y dS X dd� |� �d�D ��|s�| �|� j� j|��S � ���fdd�|D �S )NrD r )r� c S s h | ] }t |��qS rD )r| �rY �crD rD rE � <setcomp>� s z*Factory.find_candidates.<locals>.<setcomp>c 3 sB | ]:� t � ��kr��� �rt� fd d��� D ��r� V qdS )c 3 s | ]}|� � �V qd S ro )�is_satisfied_by)rY r� �r� rD rE r� � s z4Factory.find_candidates.<locals>.<genexpr>.<genexpr>N)r| r� r� )rY �r� r� � incompat_idsrH r� rE r� � s �z*Factory.find_candidates.<locals>.<genexpr>)�setr� �add�append� contextlib�suppressr r( �updater� �getr� r� r{ r� r r� r� r� ) rk r� rH r� r� r� �explicit_candidatesr� r� �candr� �parsed_requirementrD r� rE �find_candidatest sN �� ����zFactory.find_candidates)r� �requested_extrasrW c C s� |� |�s t�d|j|j� d S |js.t|�S | �|j� | j|jt |j �||jr\t |j�nd d d�}|d kr�|js�| j |j �t t |j��S | �|�S )Nz6Ignoring %s: markers '%s' don't match your environmentr� )� match_markersr� r� r� �markersrq r: ry r� r� r{ r rd r; � make_requirement_from_candidate)rk r� r� r� rD rD rE �"_make_requirement_from_install_req� s, � � z*Factory._make_requirement_from_install_req)� root_ireqsrW c C s� t g i i �}t|�D ]�\}}|jr�t|�}|r6t|��|�� s@q|jsNtd��t|j�}||j krv|j | |M < q�t � |�|j |< q| j |dd�}|d kr�q|j r�|j|jkr�||j|j< |j�|� q|S )NzConstraint must be namedrD )r� )rG � enumerater� r$ r r� r� r� r rI r- � from_ireqr� � user_suppliedrJ rH r� )rk r� � collected�ir� �problemr� r� rD rD rE �collect_root_requirements� s. � z!Factory.collect_root_requirements)r rW c C s t |�S ro )r8 )rk r rD rD rE r� � s z'Factory.make_requirement_from_candidaterD )r� � comes_fromr� rW c C s | � ||�}| �||�S ro )r` r� )rk r� r� r� r� rD rD rE �make_requirement_from_spec� s z"Factory.make_requirement_from_specr� c C s" | j r d S t|�sd S t|| j�S ro )rc rK r9 r_ )rk r� rD rD rE � make_requires_python_requirement s z(Factory.make_requires_python_requirement)rq r� rW c C s* | j dks| jjrdS | j j||t� d�S )a� Look up the link in the wheel cache. 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N)rq � package_name�supported_tags)r^ rO �require_hashes�get_cache_entryr& )rk rq r� rD rD rE �get_wheel_cache_entry s �z Factory.get_wheel_cache_entryc C s� | j �|j�}|d krd S z<|jtjdddtjid�tjdddtjid�fkrTW d S W n tk rj Y nX | j sv|S |j r�|S t � r�|j r�d|j � d|j� �}t|��d S )N�purelib� rpm_prefixrz )�scheme�vars�platlibzNWill not install to the user site because it will lack sys.path precedence to z in )rj r� r� �installed_location� sysconfig�get_path�sys� base_prefixr} ra � in_usersiter) �in_site_packages�raw_name�locationr )rk r rZ �messagerD rD rE �get_dist_to_uninstall$ s( � �z Factory.get_dist_to_uninstallr= )�causesrW c C s� |s t d��| jj}t|�dkrVt|d jj�}d|d jj�d|� d|��}t |�S d|� d�}|D ]0}|j� � }t|jj�}|d |�d |� d �7 }qft |�S ) Nz,Requires-Python error reported with no causer* r zPackage z requires a different Python: z not in z%Packages require a different Python. z not in:� z (required by �)) r� r_ r� �lenrK r> r� r? r� r �format_for_error)rk r� r� r� r� �cause�packagerD rD rE � _report_requires_python_errorJ s � z%Factory._report_requires_python_error)r� r? rW c C s� |d krt |�}n|� d|j� d�}| j�|j�}| j�� }dd� tdd� |D ��D �}|rrt�dd� |�pnd � t�d |d � |�p�d � t |�d kr�t� d � t d|� ��S )Nz (from r� c S s g | ] }t |��qS rD )rK )rY �vrD rD rE � <listcomp>j s z?Factory._report_single_requirement_conflict.<locals>.<listcomp>c S s h | ] }|j �qS rD )r� r� rD rD rE r� j s z>Factory._report_single_requirement_conflict.<locals>.<setcomp>zJIgnored the following versions that require a different python version: %sz; �nonezNCould not find a version that satisfies the requirement %s (from versions: %s)�, zrequirements.txtz�HINT: You are attempting to install a package literally named "requirements.txt" (which cannot exist). Consider using the '-r' flag to install the packages listed in requirements.txtz#No matching distribution found for ) rK r� r] �find_all_candidatesr� � requires_python_skipped_reasons�sortedr� �critical�joinr� r )rk r� r? �req_disp�cands�skipped_by_requires_python�versionsrD rD rE �#_report_single_requirement_conflict` s* � � �z+Factory._report_single_requirement_conflictz,ResolutionImpossible[Requirement, Candidate])r� rI rW c s� |j std��� fdd�|j D �}|r6� �td|��S t|j �dkrh|j d \}}|j|krh� �||�S tt td�dd �}t td �d d �}t � }|j D ],\}}|d kr�|� � } n||�} |� | � q�|r�|t |��} nd } d�| �} t�| � d} t � } |j D ]^\}}|j|k�r | � |j� | d } |�rH| |j� d|j� d� } n| d } | |� � } �q | D ]"} || j}| d| � |� �7 } �qd| d d d d d } t�| � td�S )Nz)Installation error reported with no causec s* g | ]"}t |jt�r|j�� j�s|�qS rD )� isinstancer> r9 r� r_ )rY r� rp rD rE r � s �z2Factory.get_installation_error.<locals>.<listcomp>zSequence[ConflictCause]r* r )�partsrW c S s2 t | �dkr| d S d�| d d� �d | d S )Nr* r r ���z and )r� r )r rD rD rE � text_join� s z1Factory.get_installation_error.<locals>.text_join)r? rW c S sF | � � }|r|js$| j� d| j� �S t|jt�r<t|jj�S t|j�S )Nr� )�get_install_requirementr� r� r� r r# rK )r? r� rD rD rE �describe_trigger� s z8Factory.get_installation_error.<locals>.describe_triggerzthe requested packageszOCannot install {} because these package versions have conflicting dependencies.z The conflict is caused by:z � z depends on zThe user requested z% The user requested (constraint) z z To fix this you could try to: z91. loosen the range of package versions you've specified z92. remove package versions to allow pip attempt to solve zthe dependency conflict z�ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts)r� r� r� r r� r� r r rK r+ r� r� r� r �formatr� r r� r� r� r )rk r� rI �requires_python_causesr� r? r r �triggers�triggerr� rx �relevant_constraints�key�specrD rp rE �get_installation_error� sr �� �� ������ �z Factory.get_installation_error)N)rD );r@ rA rB r r! r% r r r� r rL rm �propertyrS r ry r0 r rK r2 r� r r# r+ r� r r, r� r r r' r r r� r. r r� r- r� r r� r� r rG r� r8 r� r� r� r r� r� r r� r r r r r rD rD rD rE rM Z s� �� & � � � @� c� � � G � !� � �� � � '� � $ �rM )^r� r� �loggingr� r� �typingr r r r r r r r r r r r r r �"pip._vendor.packaging.requirementsr Z pip._vendor.packaging.specifiersr �pip._vendor.packaging.utilsr r �pip._vendor.resolvelibr �pip._internal.cacher r �pip._internal.exceptionsr r r r r �"pip._internal.index.package_finderr �pip._internal.metadatar r �pip._internal.models.linkr �pip._internal.models.wheelr � pip._internal.operations.preparer! � pip._internal.req.constructorsr" Z pip._internal.req.req_installr# r$ � pip._internal.resolution.baser% �&pip._internal.utils.compatibility_tagsr& �pip._internal.utils.hashesr' � pip._internal.utils.packagingr( � pip._internal.utils.virtualenvr) rz r+ r, r- r. � candidatesr/ r0 r1 r2 r3 r4 r5 �found_candidatesr6 r7 rH r8 r9 r: r; r< r= � getLoggerr@ r� rF �CacherG rM rD rD rD rE �<module> sF @ $
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