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|jr�t� � t � d|j j� W d � n1 s�0 Y dS )z3Provide context for the requirement being prepared.z Processing %sz Collecting %sz (from �)zUsing cached %sN)r: ra �is_wheel_from_cacherN r% r\ r, r( � comes_from� isinstancerZ r� rj rk r$ rh )rI r, �message� informationr� r7 r7 r8 �_log_preparing_link s" z'RequirementPreparer._log_preparing_link)r, �parallel_buildsr1 c C sP |j jr dS |jdu sJ �|j �� r2|j j|_dS |j| jd|d� |�� dS )z1Ensure source_dir of a linked InstallRequirement.NT)� autodeleter� )r: rb � source_dirr` r\ �ensure_has_source_dirrp � ensure_pristine_source_checkout)rI r, r� r7 r7 r8 �_ensure_link_req_src_dir4 s �z,RequirementPreparer._ensure_link_req_src_dirc C sT | j s|jdd�S |jjr t� �|j�� r0t� �|jsB|jsBt � �|jdd�pRt � S )NT)�trust_internetF) rt rR r: r_ r r` r � is_direct� is_pinnedr r# �rI r, r7 r7 r8 �_get_linked_req_hashesK s z*RequirementPreparer._get_linked_req_hashesc C s> | j rt�d� d S | jr(t�d� d S | �|�p<| �|j�S )Nz9Metadata-only fetching is not used in the legacy resolverz?Metadata-only fetching is not used as hash checking is required)rw rj �debugrt �$_fetch_metadata_using_link_data_attr� _fetch_metadata_using_lazy_wheelr: r� r7 r7 r8 �_fetch_metadata_onlyk s ��� �z(RequirementPreparer._fetch_metadata_onlyc C s� |j �� }|du rdS |jdus$J �t�d|j|� t|| j|�� d�}t|j d��}|� � }W d � n1 sr0 Y t ||j j |jj �}t|j�t|jj �kr�t|d|jj |j��|S )zGFetch metadata from the data-dist-info-metadata attribute, if possible.Nz/Obtaining dependency information for %s from %sr^ �rb�Name)r: � metadata_linkr, rj �verboser[ r} � as_hashes�openrD �readr rh �namer �raw_namer )rI r, r� � metadata_file�f�metadata_contents� metadata_distr7 r7 r8 r� ~ s4 ��&� �z8RequirementPreparer._fetch_metadata_using_link_data_attr)r: r1 c C s� | j s dS |js|js&t�d|� dS t|j�}t|j�}t� d||j � |j � dd�d }zt ||| j�W S ty� t�d|� Y dS 0 dS )z-Fetch metadata using lazy wheel, if possible.Nz=Lazy wheel is not used as %r does not point to a remote wheelz+Obtaining dependency information from %s %s�#� r z"%s does not support range requests)r ra rb rj r� r rh r r� rk �versionr= �splitr r| r )rI r: �wheelr� r= r7 r7 r8 r� � s* � � z4RequirementPreparer._fetch_metadata_using_lazy_wheelF)�partially_downloaded_reqsr� r1 c C s� t ddd�j}i }|D ]}|js$J �|||j< q| �|�� |�}|D ]J\}\}} t�d||� || }||_|| j|jj < |j sD|� t |�� qD|D ]}| � ||� q�dS )z>Download any requirements which were only fetched by metadata.r@ TrS zDownloading link %s to %sN)r) rD r: r~ �keysrj r� �local_file_pathr� r= rb �needs_unpacked_archiver �_prepare_linked_requirement) rI r� r� rX �links_to_fully_downloadr, �batch_downloadr: �filepath�_r7 r7 r8 � _complete_partial_requirements� s$ �z2RequirementPreparer._complete_partial_requirementsc C s� |j s J �| �|� t� �� d}| jdurT|j jrT| �|�}t|j | j||j d�}|durl|| j|j j < n*| � |�}|dur�d|_ |W d � S | � ||�W d � S 1 s�0 Y dS )z3Prepare a requirement to be obtained from req.link.N)re T) r: r� r$ rQ rb r� rV r� r� r= r� �needs_more_preparationr� )rI r, r� r\ rR r� r7 r7 r8 �prepare_linked_requirement� s& � z.RequirementPreparer.prepare_linked_requirement)�reqsr� r1 c C s� dd� |D �}|D ]L}| j dur|jjr| �|�}t|j| j |�}|dur|| j|jj< d|_qg }|D ]"}|jr~|�|� qh| � ||� qh| j ||d� dS )z,Prepare linked requirements more, if needed.c S s g | ]}|j r|�qS r7 )r� )�.0r, r7 r7 r8 � <listcomp> � zHRequirementPreparer.prepare_linked_requirements_more.<locals>.<listcomp>NF)r� ) rQ r: rb r� rV r� r= r� �appendr� r� )rI r� r� r, rR r\ r� r7 r7 r8 � prepare_linked_requirements_more s" �z4RequirementPreparer.prepare_linked_requirements_morec C s� |j s J �|j }| �|�}|r�|jr�|jd us2J �|js<J �|jsFJ �t|jjt�rt|jjj rt|� |jjj �rtd }nt � d� |j |_ |j }| �||� |�� r�d }n�|j| jv�rz t||j| j| j| j|�}W n@ t�y } z&td|� d|� d|� ���W Y d }~n d }~0 0 n(| j|j }|�r2|�|� t|d d�}|jd u �r�|j�rVJ �t ||j�|_t|jjt��r�|jjj �s�|�r�t |j �d � � }d|� �|jj_ |�r�|j |_!t"|| j#| j$| j%| j&�} | S )NzyThe hashes of the source archive found in cache entry don't match, ignoring cached built wheel and re-downloading source.z Could not install requirement z because of HTTP error z for URL )rE r zsha256=)'r: r� r� � download_inforb ra r� rk r rR � has_one_ofrj rl �cached_wheel_source_linkr� r` r= r� rd r� r} r< rQ r r rW rC �editabler! r& rD � hexdigest�hashr� r9 r- r. r/ r0 ) rI r, r� r: rR � local_file�excr\ r� �distr7 r7 r8 r� 4 s� ��� � ���� ����z/RequirementPreparer._prepare_linked_requirementc C s� | j d usJ �|jd us J �|j}|js6|�� rF|jrF|�| j � d S |�� r^t�d|� d S |jd u rld S t j � | j |j �}t j � |�s�t�|j|� t|�}t�d|� d S )NzENot copying link to destination directory since it is a directory: %szSaved %s)rQ r: r_ r` r� �archiverj r� r� rf rD rg rh ri �shutil�copyr% rk )rI r, r: �download_locationrn r7 r7 r8 �save_linked_requirement� s& � z+RequirementPreparer.save_linked_requirementc C s� |j sJ d��t�d|� t� �t | jr8td|� d���|�| j� |�� |j sVJ �t |j �|_ t || j| j| j| j�}|�| j� W d � n1 s�0 Y |S )z Prepare an editable requirement.z-cannot prepare a non-editable req as editablez Obtaining %szThe 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