U
    gD                  
   @   s  d dl Z d dlZd dlZd dlZd dlZd dlZd dlZd dlZd dlZd dl	Z	d dl
Z
d dlZ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lmZ ddd	d
ddddddg
ZG dd	 d	eZG dd deddZG dd dejZG dd dZG dd dZG dd deZ G dd dZ!G dd dZ"G d d! d!e Z#G d"d# d#eZ$d$d
 Z%d%d Z&d&d Z'd'd Z(d(d Z)d)d Z*d*d Z+dS )+    N)ConfigParser)suppress)import_module)MetaPathFinder)starmapDistributionDistributionFinderPackageNotFoundErrordistributiondistributionsentry_pointsfilesmetadatarequiresversionc                   @   s   e Zd ZdZdS )r	   zThe package was not found.N)__name__
__module____qualname____doc__ r   r   (/usr/lib/python3.8/importlib/metadata.pyr	   %   s   c                   @   sV   e Zd ZdZedZdd Zedd Z	e
dd Ze
d	d
 Zdd Zdd ZdS )
EntryPointzAn entry point as defined by Python packaging conventions.

    See `the packaging docs on entry points
    <https://packaging.python.org/specifications/entry-points/>`_
    for more information.
    zF(?P<module>[\w.]+)\s*(:\s*(?P<attr>[\w.]+))?\s*(?P<extras>\[.*\])?\s*$c                 C   sD   | j | j}t|d}td|dp,dd}tt	||S )zLoad the entry point from its definition. If only a module
        is indicated by the value, return that module. Otherwise,
        return the named object.
        moduleNattr .)
patternmatchvaluer   groupfiltersplit	functoolsreducegetattr)selfr   r   Zattrsr   r   r   loadG   s    zEntryPoint.loadc                 C   s(   | j | j}ttd|dp"dS )Nz\w+extrasr   )r   r   r   listrefinditerr   )r%   r   r   r   r   r'   Q   s    zEntryPoint.extrasc                    s    fdd  D S )Nc                    s,   g | ]$} |D ]\}} |||qqS r   items).0r   namer   clsconfigr   r   
<listcomp>X   s    z+EntryPoint._from_config.<locals>.<listcomp>)sectionsr/   r   r/   r   _from_configV   s    zEntryPoint._from_configc                 C   sN   t dd}t|_z|| W n$ tk
rB   |t| Y nX t	|S )N=)Z
delimiters)
r   strZoptionxformZread_stringAttributeErrorZreadfpioStringIOr   r4   )r0   textr1   r   r   r   
_from_text^   s    
zEntryPoint._from_textc                 C   s   t | j| fS )zO
        Supply iter so one may construct dicts of EntryPoints easily.
        )iterr.   r%   r   r   r   __iter__j   s    zEntryPoint.__iter__c                 C   s   | j | j| j| jffS N)	__class__r.   r   r   r=   r   r   r   
__reduce__p   s    zEntryPoint.__reduce__N)r   r   r   r   r)   compiler   r&   propertyr'   classmethodr4   r;   r>   rA   r   r   r   r   r   )   s   



r   ZEntryPointBasezname value groupc                   @   s*   e Zd ZdZd
ddZdd Zdd Zd	S )PackagePathz"A reference to a path in a packageutf-8c              
   C   s0   |   j|d}| W  5 Q R  S Q R X d S )Nencodinglocateopenread)r%   rH   streamr   r   r   	read_textz   s    zPackagePath.read_textc              
   C   s.   |   d}| W  5 Q R  S Q R X d S )NrbrI   )r%   rM   r   r   r   read_binary~   s    zPackagePath.read_binaryc                 C   s   | j | S )z'Return a path-like object for this path)distlocate_filer=   r   r   r   rJ      s    zPackagePath.locateN)rF   )r   r   r   r   rN   rP   rJ   r   r   r   r   rE   w   s   
rE   c                   @   s   e Zd Zdd Zdd ZdS )FileHashc                 C   s   | d\| _}| _d S )Nr5   )	partitionmoder   )r%   spec_r   r   r   __init__   s    zFileHash.__init__c                 C   s   d | j| jS )Nz<FileHash mode: {} value: {}>)formatrU   r   r=   r   r   r   __repr__   s    zFileHash.__repr__N)r   r   r   rX   rZ   r   r   r   r   rS      s   rS   c                   @   s   e Zd ZdZejdd Zejdd Zedd Z	edd	 Z
ed
d Zedd Zedd Zedd Zedd Zedd Zdd Zdd Zedd Zdd Zdd Zed d! Zed"d# Zed$d% Zd&S )'r   zA Python distribution package.c                 C   s   dS )zAttempt to load metadata file given by the name.

        :param filename: The name of the file in the distribution info.
        :return: The text if found, otherwise None.
        Nr   r%   filenamer   r   r   rN      s    zDistribution.read_textc                 C   s   dS )z[
        Given a path to a file in this distribution, return a path
        to it.
        Nr   r%   pathr   r   r   rR      s    zDistribution.locate_filec                 C   sD   |   D ].}|tj|d}t|d}|dk	r|  S qt|dS )af  Return the Distribution for the given package name.

        :param name: The name of the distribution package to search for.
        :return: The Distribution instance (or subclass thereof) for the named
            package, if found.
        :raises PackageNotFoundError: When the named package's distribution
            metadata cannot be found.
        r.   N)_discover_resolversr   Contextnextr	   )r0   r.   resolverZdistsrQ   r   r   r   	from_name   s    


zDistribution.from_namec                    sJ   | dd  r|rtd p*tjf | tj fdd|  D S )a  Return an iterable of Distribution objects for all packages.

        Pass a ``context`` or pass keyword arguments for constructing
        a context.

        :context: A ``DistributionFinder.Context`` object.
        :return: Iterable of Distribution objects for all packages.
        contextNz cannot accept context and kwargsc                 3   s   | ]}| V  qd S r?   r   )r-   rc   re   r   r   	<genexpr>   s   z(Distribution.discover.<locals>.<genexpr>)pop
ValueErrorr   ra   	itertoolschainfrom_iterabler`   )r0   kwargsr   rf   r   discover   s    
zDistribution.discoverc                 C   s   t t| S )zReturn a Distribution for the indicated metadata path

        :param path: a string or path-like object
        :return: a concrete Distribution instance for the path
        )PathDistributionpathlibPath)r^   r   r   r   at   s    zDistribution.atc                  C   s   dd t jD } td| S )z#Search the meta_path for resolvers.c                 s   s   | ]}t |d dV  qdS )find_distributionsN)r$   )r-   finderr   r   r   rg      s   z3Distribution._discover_resolvers.<locals>.<genexpr>N)sys	meta_pathr    )Zdeclaredr   r   r   r`      s    z Distribution._discover_resolversc                 C   s(   |  dp|  dp|  d}t|S )zReturn the parsed metadata for this Distribution.

        The returned object will have keys that name the various bits of
        metadata.  See PEP 566 for details.
        ZMETADATAzPKG-INFOr   )rN   emailZmessage_from_stringr%   r:   r   r   r   r      s    
zDistribution.metadatac                 C   s
   | j d S )z;Return the 'Version' metadata for the distribution package.ZVersion)r   r=   r   r   r   r      s    zDistribution.versionc                 C   s   t | dS )Nzentry_points.txt)r   r;   rN   r=   r   r   r   r      s    zDistribution.entry_pointsc                    s6      p  }d fdd	}|o4tt|t|S )aB  Files in this distribution.

        :return: List of PackagePath for this distribution or None

        Result is `None` if the metadata file that enumerates files
        (i.e. RECORD for dist-info or SOURCES.txt for egg-info) is
        missing.
        Result may be empty if the metadata exists but is empty.
        Nc                    s6   t | }|rt|nd |_|r&t|nd |_ |_|S r?   )rE   rS   hashintsizerQ   )r.   ry   Zsize_strresultr=   r   r   	make_file   s
    z%Distribution.files.<locals>.make_file)NN)_read_files_distinfo_read_files_egginfor(   r   csvreader)r%   Z
file_linesr}   r   r=   r   r      s    zDistribution.filesc                 C   s   |  d}|o| S )z*
        Read the lines of RECORD
        ZRECORD)rN   
splitlinesrx   r   r   r   r~     s    
z!Distribution._read_files_distinfoc                 C   s   |  d}|otdj| S )z`
        SOURCES.txt might contain literal commas, so wrap each line
        in quotes.
        zSOURCES.txtz"{}")rN   maprY   r   rx   r   r   r   r     s    
z Distribution._read_files_egginfoc                 C   s   |   p|  }|ot|S )z6Generated requirements specified for this Distribution)_read_dist_info_reqs_read_egg_info_reqsr(   )r%   Zreqsr   r   r   r     s    zDistribution.requiresc                 C   s   | j dS )NzRequires-Dist)r   Zget_allr=   r   r   r   r     s    z!Distribution._read_dist_info_reqsc                 C   s   |  d}|o| |S )Nzrequires.txt)rN   _deps_from_requires_text)r%   sourcer   r   r   r      s    
z Distribution._read_egg_info_reqsc                 C   s4   |  | }dd t|tdD }| |S )Nc                 S   s&   i | ]\}}|t ttd |qS )line)r(   r   operator
itemgetter)r-   sectionZresultsr   r   r   
<dictcomp>'  s    z9Distribution._deps_from_requires_text.<locals>.<dictcomp>r   )_read_sectionsr   rj   groupbyr   r   %_convert_egg_info_reqs_to_simple_reqs)r0   r   Zsection_pairsr3   r   r   r   r   $  s
    z%Distribution._deps_from_requires_textc                 c   s<   d }t d | D ](}td|}|r.|d}qt V  qd S )Nz	\[(.*)\]$   )r    r)   r   r   locals)linesr   r   Zsection_matchr   r   r   r   .  s    
zDistribution._read_sectionsc                 #   sB   dd   fdd}|   D ] \}}|D ]}||| V  q(qdS )a  
        Historically, setuptools would solicit and store 'extra'
        requirements, including those with environment markers,
        in separate sections. More modern tools expect each
        dependency to be defined separately, with any relevant
        extras and environment markers attached directly to that
        requirement. This method converts the former to the
        latter. See _test_deps_from_requires_text for an example.
        c                 S   s   | odj | dS )Nzextra == "{name}"r_   )rY   r_   r   r   r   make_conditionC  s    zJDistribution._convert_egg_info_reqs_to_simple_reqs.<locals>.make_conditionc                    sX   | pd} |  d\}}}|r,|r,dj|d}ttd | |g}|rTdd| S dS )Nr   :z({markers}))markersz; z and )rT   rY   r(   r    join)r   Zextrasepr   Z
conditionsr   r   r   parse_conditionF  s    zKDistribution._convert_egg_info_reqs_to_simple_reqs.<locals>.parse_conditionNr+   )r3   r   r   ZdepsZdepr   r   r   r   8  s
    z2Distribution._convert_egg_info_reqs_to_simple_reqsN)r   r   r   r   abcabstractmethodrN   rR   rD   rd   rn   staticmethodrr   r`   rC   r   r   r   r   r~   r   r   r   r   r   r   r   r   r   r   r   r      sB   











	
	c                   @   s2   e Zd ZdZG dd dZeje fddZdS )r   zJ
    A MetaPathFinder capable of discovering installed distributions.
    c                   @   s(   e Zd ZdZdZdd Zedd ZdS )zDistributionFinder.Contextaw  
        Keyword arguments presented by the caller to
        ``distributions()`` or ``Distribution.discover()``
        to narrow the scope of a search for distributions
        in all DistributionFinders.

        Each DistributionFinder may expect any parameters
        and should attempt to honor the canonical
        parameters defined below when appropriate.
        Nc                 K   s   t | | d S r?   )varsupdate)r%   rm   r   r   r   rX   j  s    z#DistributionFinder.Context.__init__c                 C   s   t | dtjS )z
            The path that a distribution finder should search.

            Typically refers to Python package paths and defaults
            to ``sys.path``.
            r^   )r   getru   r^   r=   r   r   r   r^   m  s    zDistributionFinder.Context.path)r   r   r   r   r.   rX   rC   r^   r   r   r   r   ra   X  s
   ra   c                 C   s   dS )z
        Find distributions.

        Return an iterable of all Distribution instances capable of
        loading the metadata for packages matching the ``context``,
        a DistributionFinder.Context instance.
        Nr   )r%   re   r   r   r   rs   w  s    z%DistributionFinder.find_distributionsN)r   r   r   r   ra   r   r   rs   r   r   r   r   r   S  s   c                   @   s@   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	dS )FastPathzF
    Micro-optimized class for searching a path for
    children.
    c                 C   s   || _ tj| | _d S r?   )rootosr^   basenamelowerbase)r%   r   r   r   r   rX     s    zFastPath.__init__c                 C   s   t | j|S r?   )rp   rq   r   )r%   childr   r   r   joinpath  s    zFastPath.joinpathc              
   C   sT   t t t| jpdW  5 Q R  S Q R X t t |  W  5 Q R  S Q R X g S )Nr   )r   	Exceptionr   listdirr   zip_childrenr=   r   r   r   children  s
    
"
zFastPath.childrenc                 C   s2   t | j}|j }|j| _tdd |D S )Nc                 s   s    | ]}| tjd d V  qdS )r   r   N)r!   	posixpathr   )r-   r   r   r   r   rg     s   z(FastPath.zip_children.<locals>.<genexpr>)zipfilerq   r   Znamelistr   dictfromkeys)r%   Zzip_pathnamesr   r   r   r     s    

zFastPath.zip_childrenc                 C   s&   | j }||jkp$||jo$|dS )N.egg)r   versionless_egg_name
startswithprefixendswith)r%   searchr   r   r   r   is_egg  s
    
zFastPath.is_eggc                 c   sZ   |   D ]L}| }||jksH||jr6||jsH| |r|dkr| |V  qd S )Nzegg-info)	r   r   exact_matchesr   r   r   suffixesr   r   )r%   r.   r   Zn_lowr   r   r   r     s    


zFastPath.searchN)
r   r   r   r   rX   r   r   r   r   r   r   r   r   r   r     s   
r   c                   @   s6   e Zd ZdZdZdZdZdgdd ZdZdd Z	dS )PreparedzE
    A prepared search for metadata on a possibly-named package.
    r   )z
.dist-infoz	.egg-infoNr   c                    sV   | _ |d krd S | dd _ jd  _ fdd jD  _ jd  _d S )N-rW   c                    s   g | ]} j | qS r   )
normalized)r-   suffixr=   r   r   r2     s    z%Prepared.__init__.<locals>.<listcomp>r   )r.   r   replacer   r   r   r   r   )r%   r.   r   r=   r   rX     s    
zPrepared.__init__)
r   r   r   r   r   r   r   r   r   rX   r   r   r   r   r     s   r   c                   @   s,   e Zd Zee fddZedd ZdS )MetadataPathFinderc                 C   s   |  |j|j}tt|S )a   
        Find distributions.

        Return an iterable of all Distribution instances capable of
        loading the metadata for packages matching ``context.name``
        (or all names if ``None`` indicated) along the paths in the list
        of directories ``context.path``.
        )_search_pathsr.   r^   r   ro   )r0   re   foundr   r   r   rs     s    
z%MetadataPathFinder.find_distributionsc                    s    t j fddtt|D S )z1Find metadata directories in paths heuristically.c                 3   s   | ]}| t V  qd S r?   )r   r   )r-   r^   r_   r   r   rg     s   z3MetadataPathFinder._search_paths.<locals>.<genexpr>)rj   rk   rl   r   r   )r0   r.   pathsr   r_   r   r     s    z MetadataPathFinder._search_pathsN)r   r   r   rD   r   ra   rs   r   r   r   r   r   r     s   r   c                   @   s.   e Zd Zdd Zdd Zejje_dd ZdS )ro   c                 C   s
   || _ dS )zConstruct a distribution from a path to the metadata directory.

        :param path: A pathlib.Path or similar object supporting
                     .joinpath(), __div__, .parent, and .read_text().
        N)_pathr]   r   r   r   rX     s    zPathDistribution.__init__c              
   C   s<   t ttttt" | j|jddW  5 Q R  S Q R X d S )NrF   rG   )	r   FileNotFoundErrorIsADirectoryErrorKeyErrorNotADirectoryErrorPermissionErrorr   r   rN   r[   r   r   r   rN     s
     zPathDistribution.read_textc                 C   s   | j j| S r?   )r   parentr]   r   r   r   rR     s    zPathDistribution.locate_fileN)r   r   r   rX   rN   r   r   rR   r   r   r   r   ro     s   
ro   c                 C   s
   t | S )zGet the ``Distribution`` instance for the named package.

    :param distribution_name: The name of the distribution package as a string.
    :return: A ``Distribution`` instance (or subclass thereof).
    )r   rd   Zdistribution_namer   r   r   r
     s    c                  K   s   t jf | S )z|Get all ``Distribution`` instances in the current environment.

    :return: An iterable of ``Distribution`` instances.
    )r   rn   )rm   r   r   r   r     s    c                 C   s   t | jS )zGet the metadata for the named package.

    :param distribution_name: The name of the distribution package to query.
    :return: An email.Message containing the parsed metadata.
    )r   rd   r   r   r   r   r   r     s    c                 C   s
   t | jS )zGet the version string for the named package.

    :param distribution_name: The name of the distribution package to query.
    :return: The version string for the package as defined in the package's
        "Version" metadata key.
    )r
   r   r   r   r   r   r     s    c                  C   sH   t jdd t D } td}t| |d}t ||}dd |D S )zwReturn EntryPoint objects for all installed packages.

    :return: EntryPoint objects for all installed packages.
    c                 s   s   | ]}|j V  qd S r?   )r   )r-   rQ   r   r   r   rg     s    zentry_points.<locals>.<genexpr>r   )keyc                 S   s   i | ]\}}|t |qS r   )tuple)r-   r   epsr   r   r   r     s    z entry_points.<locals>.<dictcomp>)rj   rk   rl   r   r   
attrgettersortedr   )r   Zby_groupZorderedZgroupedr   r   r   r     s    
c                 C   s
   t | jS )zReturn a list of files for the named package.

    :param distribution_name: The name of the distribution package to query.
    :return: List of files composing the distribution.
    )r
   r   r   r   r   r   r   %  s    c                 C   s
   t | jS )z
    Return a list of requirements for the named package.

    :return: An iterator of requirements, suitable for
    packaging.requirement.Requirement.
    )r
   r   r   r   r   r   r   .  s    ),r8   r   r)   r   r   ru   rw   rp   r   r   r"   rj   r   collectionsZconfigparserr   
contextlibr   	importlibr   importlib.abcr   r   __all__ModuleNotFoundErrorr	   
namedtupler   ZPurePosixPathrE   rS   r   r   r   r   r   ro   r
   r   r   r   r   r   r   r   r   r   r   <module>   sb   

N E/0		
	