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"""Shared AIX support functions."""

import sys

import sysconfig

try:

import subprocess

except ImportError: # pragma: no cover

# _aix_support is used in distutils by setup.py to build C extensions,

# before subprocess dependencies like _posixsubprocess are available.

import _bootsubprocess as subprocess

def _aix_tag(vrtl, bd):

# type: (List[int], int) -> str

# Infer the ABI bitwidth from maxsize (assuming 64 bit as the default)

_sz = 32 if sys.maxsize == (2**31-1) else 64

_bd = bd if bd != 0 else 9988

# vrtl[version, release, technology_level]

return "aix-{:1x}{:1d}{:02d}-{:04d}-{}".format(vrtl[0], vrtl[1], vrtl[2], _bd, _sz)

# extract version, release and technology level from a VRMF string

def _aix_vrtl(vrmf):

# type: (str) -> List[int]

v, r, tl = vrmf.split(".")[:3]

return [int(v[-1]), int(r), int(tl)]

def _aix_bos_rte():

# type: () -> Tuple[str, int]

"""

Return a Tuple[str, int] e.g., ['7.1.4.34', 1806]

The fileset bos.rte represents the current AIX run-time level. It's VRMF and

builddate reflect the current ABI levels of the runtime environment.

If no builddate is found give a value that will satisfy pep425 related queries

"""

# All AIX systems to have lslpp installed in this location

out = subprocess.check_output(["/usr/bin/lslpp", "-Lqc", "bos.rte"])

out = out.decode("utf-8")

out = out.strip().split(":") # type: ignore

_bd = int(out[-1]) if out[-1] != '' else 9988

return (str(out[2]), _bd)

def aix_platform():

# type: () -> str

"""

AIX filesets are identified by four decimal values: V.R.M.F.

V (version) and R (release) can be retreived using ``uname``

Since 2007, starting with AIX 5.3 TL7, the M value has been

included with the fileset bos.rte and represents the Technology

Level (TL) of AIX. The F (Fix) value also increases, but is not

relevant for comparing releases and binary compatibility.

For binary compatibility the so-called builddate is needed.

Again, the builddate of an AIX release is associated with bos.rte.

AIX ABI compatibility is described as guaranteed at: https://www.ibm.com/\

support/knowledgecenter/en/ssw_aix_72/install/binary_compatability.html

For pep425 purposes the AIX platform tag becomes:

"aix-{:1x}{:1d}{:02d}-{:04d}-{}".format(v, r, tl, builddate, bitsize)

e.g., "aix-6107-1415-32" for AIX 6.1 TL7 bd 1415, 32-bit

and, "aix-6107-1415-64" for AIX 6.1 TL7 bd 1415, 64-bit

"""

vrmf, bd = _aix_bos_rte()

return _aix_tag(_aix_vrtl(vrmf), bd)

# extract vrtl from the BUILD_GNU_TYPE as an int

def _aix_bgt():

# type: () -> List[int]

gnu_type = sysconfig.get_config_var("BUILD_GNU_TYPE")

if not gnu_type:

raise ValueError("BUILD_GNU_TYPE is not defined")

return _aix_vrtl(vrmf=gnu_type)

def aix_buildtag():

# type: () -> str

"""

Return the platform_tag of the system Python was built on.

"""

# AIX_BUILDDATE is defined by configure with:

# lslpp -Lcq bos.rte | awk -F: '{ print $NF }'

build_date = sysconfig.get_config_var("AIX_BUILDDATE")

try:

build_date = int(build_date)

except (ValueError, TypeError):

raise ValueError(f"AIX_BUILDDATE is not defined or invalid: "

f"{build_date!r}")

return _aix_tag(_aix_bgt(), build_date)

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