B Ka @sxdZddlZddlZddlZddlZddlZddlZddlZddlZddl m Z m Z m Z m Z mZe eeeedfdddZe ee edd d ZGd d d e Zee ed ddZeee edddZee edddZedkrtddlZeZedstdedeedeej edddx4ee!dde"d d!d"D]Z#ee#d#dq^WdS)$zPEP 656 support. This module implements logic to detect if the currently running Python is linked against musl, and what musl version is used. N)IOIterator NamedTupleOptionalTuple.)ffmtreturncCst||t|S)N)structunpackreadcalcsize)rrr3lib/python3.7/site-packages/packaging/_musllinux.py_read_unpackedsr)rr c Csd|dyt|d}Wntjk r.dSX|ddtdkrHdS|tddydd d |d\}}}Wntk rdSXtj|}yt||\}}}}}}} Wntjk rdSXxt | dD]} |||| y|t||\} } } Wntjk rdSX| d kr,q|| t | |  d }d |krZdS|SWdS)zDetect musl libc location by parsing the Python executable. Based on: https://gist.github.com/lyssdod/f51579ae8d93c8657a5564aefc2ffbca ELF header: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html rZ16BNsELFZHHI)ZIIIIHHHZIIIIIIII)rrr)ZQQQIHHHZIIQQQQQQ)r)rrmusl)seekrr errortupler KeyErroroperator itemgetterrangeosfsdecoder strip)rZidentZe_fmtZp_fmtZp_idxZp_get_Ze_phoffZ e_phentsizeZe_phnumiZp_typeZp_offsetZp_fileszZ interpreterrrr_parse_ld_musl_from_elfsB     r$c@seZdZUeed<eed<dS) _MuslVersionmajorminorN)__name__ __module__ __qualname__int__annotations__rrrrr%Gs r%)outputr cCsxdddd|DD}t|dks<|ddddkr@dStd |d }|sXdStt|d t|dd S) NcSsg|] }|r|qSrr).0nrrr Msz'_parse_musl_version..css|]}|VqdS)N)r!)r.r/rrr Msz&_parse_musl_version..rrrrzVersion (\d+)\.(\d+)r)r&r') splitlineslenrematchr%r+group)r-linesmrrr_parse_musl_versionLs r9) executabler c Cslt8}y|t|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)stderrZuniversal_newlines) contextlib ExitStack enter_contextopenOSErrorr$ subprocessrunPIPEr9r<)r:stackrZldprocrrr_get_musl_versionVs rG)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. NZ musllinux_r")rGsysr:rr'r&)rHZsys_muslr'rrr platform_tagsns rK__main__zlinux-z not linuxzplat:zmusl:ztags: )endz[.-]r"-rrIz )$__doc__r= functoolsrrr4r rBrJtypingrrrrrbytesstrr+rr$r%r9 lru_cacherGrKr(Z sysconfigZ get_platformZplat startswithAssertionErrorprintr:subsplittrrrrs21    $