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3
Pf                 @   sd   d dl Z d dlZd dlmZ d dlmZ ddlmZ ddlm	Z	 dd Z
G d	d
 d
eZdd ZdS )    N)LockFile)MkdirLockFile   )	BaseCache)CacheControllerc             C   s   t j}|t jt jB O }tt dr*|t jO }tt dr>|t jO }yt j|  W n tt	fk
rd   Y nX t j
| ||}yt j|dS    t j|  Y nX d S )N
O_NOFOLLOWO_BINARYwb)osO_WRONLYO_CREATO_EXCLhasattrr   r   removeIOErrorOSErroropenfdopenclose)filenameZfmodeflagsfd r    /usr/lib/python3.6/file_cache.py_secure_open_write   s     




r   c               @   sB   e Zd ZdddZedd Zd	d
 Zdd Zdd Zdd Z	dS )	FileCacheF    Nc             C   sN   |d k	r|d k	rt d|r t}|d kr,t}|| _|| _|| _|| _|| _d S )Nz/Cannot use use_dir_lock and lock_class together)
ValueErrorr   r   	directoryforeverfilemodedirmode
lock_class)selfr   r    r!   r"   Zuse_dir_lockr#   r   r   r   __init__4   s    zFileCache.__init__c             C   s   t j| j j S )N)hashlibZsha224encodeZ	hexdigest)xr   r   r   r'   G   s    zFileCache.encodec             C   s4   | j |}t|d d |g }tjj| jf| S )N   )r'   listr
   pathjoinr   )r$   nameZhashedpartsr   r   r   _fnK   s    
zFileCache._fnc          	   C   s8   | j |}tjj|sd S t|d
}|j S Q R X d S )Nrb)r/   r
   r+   existsr   read)r$   keyr-   fhr   r   r   getR   s
    
zFileCache.getc             C   s|   | j |}ytjtjj|| j W n ttfk
r<   Y nX | j|*}t	|j| j
}|j| W d Q R X W d Q R X d S )N)r/   r
   makedirsr+   dirnamer"   r   r   r#   r   r!   write)r$   r3   valuer-   lockr4   r   r   r   setZ   s    
zFileCache.setc             C   s   | j |}| jstj| d S )N)r/   r    r
   r   )r$   r3   r-   r   r   r   deleteh   s    
zFileCache.delete)Fr   r   NN)
__name__
__module____qualname__r%   staticmethodr'   r/   r5   r;   r<   r   r   r   r   r   3   s    
r   c             C   s   t j| }|j|S )z\Return the file cache path based on the URL.

    This does not ensure the file exists!
    )r   Z	cache_urlr/   )ZurlZ	filecacher3   r   r   r   url_to_file_pathn   s    
rA   )r&   r
   Zpip._vendor.lockfiler   Z"pip._vendor.lockfile.mkdirlockfiler   cacher   Z
controllerr   r   r   rA   r   r   r   r   <module>   s   (;