find-deps: Support tar.zst files

from elftools.elf.dynamic import DynamicSection, DynamicSegment

from elftools.elf.elffile import ELFFile

from os import walk, environ, getcwd, chdir, access, R_OK

from os.path import join, exists, isdir, isfile, normpath, realpath

from os.path import join, exists, isdir, isfile, normpath, realpath, splitext

from pprint import pformat

from pycman import config

from pygments import highlight

from shlex import split

from sys import stdout, stderr

from tarfile import open as tar

from tempfile import TemporaryDirectory

from tempfile import TemporaryDirectory, NamedTemporaryFile

PACKAGES = None

    chdir(cwd)

    return(deps)

def extract_zst(path):

    '''Extract zstandard file'''

    import zstandard as zstd

    wh = NamedTemporaryFile()

    with open(path, "rb") as rh:

        dctx = zstd.ZstdDecompressor()

        reader = dctx.stream_reader(rh)

        while True:

            chunk = reader.read(65536)

            if not chunk:

                break

            wh.write(chunk)

    wh.seek(0, 0)

    return wh

def parse_argv():

    '''Parse command line arguments'''

    parser = ArgumentParser()

    '''Program entry point'''

    args = parse_argv()

    if isfile(args.path):

        # tarball module doesn't yet support zst file, temporary workaround

        if splitext(args.path)[1] == ".zst":

            fo = extract_zst(args.path)

        else:

            fo = open(args.path, "rb")

        tarball = tar(fileobj=fo)

        pkgdir = TemporaryDirectory()

        tarball = tar(args.path)

        tarball.extractall(pkgdir.name)

        args.path = pkgdir.name

    if isdir(args.path):