3 de@sxdZddlZddlZddlZddlZddlZddlZddlZddlZddl m Z m Z m Z m Z mZe eeeedfdddZe ee edd d ZGd d d e Zee ed ddZejee edddZee edddZedkrtddlZejZejdstdedeedeej edddx4eej!ddej"d d!d#D]Z#ee#d"dq^WdS)$zPEP 656 support. This module implements logic to detect if the currently running Python is linked against musl, and what musl version is used. N)IOIterator NamedTupleOptionalTuple.)ffmtreturncCstj||jtj|S)N)structunpackreadcalcsize)rrr?/tmp/pip-build-red6nood/pip/pip/_vendor/packaging/_musllinux.py_read_unpackedsr)rr c$Csd|jdyt|d}Wntjk r.dSX|ddtdkrHdS|jtjddyddd|d\}}}Wntk rdSXtj|}yt||\}}}}}}} Wntjk rdSXxt | dD]} |j||| y|t||\} } } Wntjk rdSX| dkr,q|j| t j |j | j d}d|krZdS|SWdS)zDetect 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 rZ16BNsELFZHHIIIIIHHHIIIIIIIIQQQIHHHIIQQQQQQ)rrmuslrrr)rrrrrr)rrr)seekrr errortupler KeyErroroperator itemgetterrangeosfsdecoder strip)ridentZe_fmtZp_fmtZp_idxZp_get_Ze_phoffZ e_phentsizeZe_phnumiZp_typeZp_offsetZp_fileszZ interpreterrrr_parse_ld_musl_from_elfsB     r+c@seZdZUeedS) _MuslVersionN)__name__ __module__ __qualname__intmajorminorrrrrr,Gs r,)outputr cCsxdddd|jDD}t|dks<|ddddkr@dStjd |d }|sXdStt|jd t|jdd S) NcSsg|] }|r|qSrr).0nrrr Msz'_parse_musl_version..css|]}|jVqdS)N)r')r4r5rrr Msz&_parse_musl_version..rrrrzVersion (\d+)\.(\d+)r)r1r2) splitlineslenrematchr,r0group)r3linesmrrr_parse_musl_versionLs r?) executabler cCsltj8}y|jt|d}Wntk r2dSXt|}WdQRX|sNdStj|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)stderruniversal_newlines) contextlib ExitStack enter_contextopenIOErrorr+ subprocessrunPIPEr?rB)r@stackrldprocrrr_get_musl_versionVs rO)archr ccsLttj}|dkrdSx0t|jddD]}d|jd|d|Vq&WdS)aTGenerate 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. NrZ musllinux_r)rQ)rOsysr@r$r2r1)rPZsys_muslr2rrr platform_tagsns rS__main__zlinux-z not linuxzplat:zmusl:ztags: )endz[.-]r)-rz rQ)$__doc__rD functoolsr"r%r:r rIrRtypingrrrrrbytesstrr0rr+r,r? lru_cacherOrSr- sysconfig get_platformplat startswithAssertionErrorprintr@subsplittrrrrs21    $