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B �5�g � @ sx d Z ddlZddlZddlZddlZddlZddlZddlZddlZddl m Z m Z m Z m Z mZ e e eeedf d�dd�Ze e e e d�d d �ZG d d � d e �Zee e d �dd�Ze�� ee e d�dd��Zee e d�dd�Zedk�rtddlZe�� Z e � d��st d��e de � e deej �� e dd d � x4ee�!d d e �"d d!�d" ��D ]Z#e e#d#d � �q^W dS )$z�PEP 656 support. This module implements logic to detect if the currently running Python is linked against musl, and what musl version is used. � N)�IO�Iterator� NamedTuple�Optional�Tuple.)�f�fmt�returnc C s t �|| �t �|���S )N)�struct�unpack�read�calcsize)r r � r �A/tmp/pip-install-251nq386/pip/pip/_vendor/packaging/_musllinux.py�_read_unpacked s r )r r c C sd | � d� yt| d�}W n tjk r. dS X |dd� td�krHdS | � t�d�d� y dd d �|d \}}}W n tk r� dS X tj|� }y t| |�\}}}}}}} W n tjk r� dS X x�t | d �D ]�} | � ||| � y|t| |��\} } } W n tjk �r dS X | d k�r,q�| � | � t � | � | ��� d �}d |k�rZdS |S W dS )z�Detect musl libc location by parsing the Python executable. Based on: https://gist.github.com/lyssdod/f51579ae8d93c8657a5564aefc2ffbca ELF header: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html r Z16BN� s ELFZHHI� )ZIIIIHHHZIIIIIIII)r r r )ZQQQIHHHZIIQQQQQQ)r � � )r r � � �musl)�seekr r �error�tupler �KeyError�operator� itemgetter�range�os�fsdecoder �strip)r �identZe_fmtZp_fmtZp_idxZp_get�_Ze_phoffZ e_phentsizeZe_phnum�iZp_typeZp_offsetZp_fileszZ interpreterr r r �_parse_ld_musl_from_elf sB r% c @ s e Zd ZU eed< eed< dS )� _MuslVersion�major�minorN)�__name__� __module__� __qualname__�int�__annotations__r r r r r& G s r& )�outputr c C sx dd� dd� | � � D �D �}t|�dk s<|d d d� dkr@d S t�d |d �}|sXd S tt|�d ��t|�d��d �S ) Nc S s g | ] }|r|�qS r r )�.0�nr r r � <listcomp>M s z'_parse_musl_version.<locals>.<listcomp>c s s | ]}|� � V qd S )N)r! )r/ r0 r r r � <genexpr>M s z&_parse_musl_version.<locals>.<genexpr>r r r r zVersion (\d+)\.(\d+)r )r' r( )� splitlines�len�re�matchr& r, �group)r. �lines�mr r r �_parse_musl_versionL s r: )� executabler c C sl t �� �8}y|�t| d��}W n tk r2 dS X t|�}W dQ R X |sNdS tj|gtjdd�}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 �rbNT)�stderr�universal_newlines) � contextlib� ExitStack� enter_context�open�OSErrorr% � subprocess�run�PIPEr: r= )r; �stackr Zld�procr r r �_get_musl_versionV s rI )�archr c c sL t tj�}|dkrdS x0t|jdd�D ] }d|j� d|� d| � �V q&W dS )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���Z musllinux_r# )rI �sysr; r r( r' )rJ Zsys_muslr( r r r � platform_tagsn s rM �__main__zlinux-z not linuxzplat:zmusl:ztags:� )�endz[.-]r# �-r rK z )$�__doc__r? � functoolsr r r5 r rD rL �typingr r r r r �bytes�strr, r r% r& r: � lru_cacherI rM r) � sysconfig� get_platform�plat� startswith�AssertionError�printr; �sub�split�tr r r r �<module> s2 1 $
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