B
    .uft
              	   @   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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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Sequence   )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   V/home/ankuromar296_gmail_com/myenv/lib/python3.7/site-packages/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text)openr   interpreterOSError	TypeError
ValueError
subprocessrunPIPEr#   r&   )r$   fldprocr   r   r   _get_musl_version   s    r3   )archsr   c             c   sZ   t tj}|dkrdS x>| D ]6}x0t|jddD ]}d|j d| d| V  q0W qW dS )a  Generate musllinux tags compatible to the current platform.

    :param archs: Sequence of compatible architectures.
        The first one shall be the closest to the actual architecture and 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__)r3   sysr$   ranger
   r	   )r4   sys_muslarchr
   r   r   r   platform_tags6   s    

r<   __main__zlinux-z	not linuxzplat:zmusl:ztags: )endz[.-]r7   -r5   z
      )__doc__	functoolsr   r-   r8   typingr   r   r   r   Z_elffiler   r   strr#   	lru_cacher3   r<   r   	sysconfigget_platformplat
startswithAssertionErrorprintr$   subsplittr   r   r   r   <module>   s(   


$