B
    d	              	   @   s$  d Z ddlZddlZddlZddlZddlmZmZmZ ddl	m
Z
 G dd deZeee dd	d
Ze eee dddZeee dddZedkr ddlZe Zedstdede edeej eddd x4eeddeddd D ]Zeedd q
W dS )zPEP 656 support.

This module implements logic to detect if the currently running Python is
linked against musl, and what musl version is used.
    N)Iterator
NamedTupleOptional   )ELFFilec               @   s   e Zd ZU eed< eed< dS )_MuslVersionmajorminorN)__name__
__module____qualname__int__annotations__ r   r   Y/var/www/html/venv/lib/python3.7/site-packages/setuptools/_vendor/packaging/_musllinux.pyr      s   
r   )outputreturnc             C   sx   dd dd |   D D }t|dk s<|d d d dkr@d S td	|d
 }|sXd S tt|d
t|ddS )Nc             S   s   g | ]}|r|qS r   r   ).0nr   r   r   
<listcomp>   s    z'_parse_musl_version.<locals>.<listcomp>c             s   s   | ]}|  V  qd S )N)strip)r   r   r   r   r   	<genexpr>   s    z&_parse_musl_version.<locals>.<genexpr>   r      muslzVersion (\d+)\.(\d+)r   )r   r	   )
splitlineslenrematchr   r   group)r   linesmr   r   r   _parse_musl_version   s     r"   )
executabler   c          
   C   sr   y$t | d}t|j}W dQ R X W n tttfk
r>   dS X |dksPd|krTdS tj|gtjdd}t	|j
S )a`  Detect currently-running musl runtime version.

    This is done by checking the specified executable's dynamic linking
    information, and invoking the loader to parse its output for a version
    string. If the loader is musl, the output would be something like::

        musl libc (x86_64)
        Version 1.2.2
        Dynamic Program Loader
    rbNr   T)stderruniversal_newlines)openr   interpreterOSError	TypeError
ValueError
subprocessrunPIPEr"   r%   )r#   fldprocr   r   r   _get_musl_version   s    r2   )archr   c             c   sL   t tj}|dkrdS x0t|jddD ]}d|j d| d|  V  q&W dS )aT  Generate musllinux tags compatible to the current platform.

    :param arch: Should be the part of platform tag after the ``linux_``
        prefix, e.g. ``x86_64``. The ``linux_`` prefix is assumed as a
        prerequisite for the current platform to be musllinux-compatible.

    :returns: An iterator of compatible musllinux tags.
    N
musllinux__)r2   sysr#   ranger	   r   )r3   sys_muslr	   r   r   r   platform_tags6   s
    	
r:   __main__zlinux-z	not linuxzplat:zmusl:ztags: )endz[.-]r6   -r4   z
      )__doc__	functoolsr   r,   r7   typingr   r   r   Z_elffiler   r   strr"   	lru_cacher2   r:   r
   	sysconfigget_platformplat
startswithAssertionErrorprintr#   subsplittr   r   r   r   <module>   s(   


$