def split_kernel_module_packages(d):
    import re

    modinfoexp = re.compile("([^=]+)=(.*)")

    def extract_modinfo(file):
        import tempfile, subprocess
        tempfile.tempdir = d.getVar("WORKDIR")
        compressed = re.match( r'.*\.(gz|xz|zst)$', file)
        tf = tempfile.mkstemp()
        tmpfile = tf[1]
        if compressed:
            tmpkofile = tmpfile + ".ko"
            if compressed.group(1) == 'gz':
                cmd = "gunzip -dc %s > %s" % (file, tmpkofile)
                subprocess.check_call(cmd, shell=True)
            elif compressed.group(1) == 'xz':
                cmd = "xz -dc %s > %s" % (file, tmpkofile)
                subprocess.check_call(cmd, shell=True)
            elif compressed.group(1) == 'zst':
                cmd = "zstd -dc %s > %s" % (file, tmpkofile)
                subprocess.check_call(cmd, shell=True)
            else:
                msg = "Cannot decompress '%s'" % file
                raise msg
            cmd = "%s -j .modinfo -O binary %s %s" % (d.getVar("OBJCOPY"), tmpkofile, tmpfile)
        else:
            cmd = "%s -j .modinfo -O binary %s %s" % (d.getVar("OBJCOPY"), file, tmpfile)
        subprocess.check_call(cmd, shell=True)
        # errors='replace': Some old kernel versions contain invalid utf-8 characters in mod descriptions (like 0xf6, 'ö')
        with open(tmpfile, errors='replace') as f:
            l = f.read().split("\000")
        os.close(tf[0])
        os.unlink(tmpfile)
        if compressed:
            os.unlink(tmpkofile)
        vals = {}
        for i in l:
            m = modinfoexp.match(i)
            if not m:
                continue
            vals[m.group(1)] = m.group(2)
        return vals

    def frob_metadata(file, pkg, pattern, format, basename):
        vals = extract_modinfo(file)

        dvar = d.getVar('PKGD')

        # If autoloading is requested, output ${modulesloaddir}/<name>.conf and append
        # appropriate modprobe commands to the postinst
        autoloadlist = (d.getVar("KERNEL_MODULE_AUTOLOAD") or "").split()
        autoload = d.getVar('module_autoload_%s' % basename)
        if autoload and autoload == basename:
            bb.warn("module_autoload_%s was replaced by KERNEL_MODULE_AUTOLOAD for cases where basename == module name, please drop it" % basename)
        if autoload and basename not in autoloadlist:
            bb.warn("module_autoload_%s is defined but '%s' isn't included in KERNEL_MODULE_AUTOLOAD, please add it there" % (basename, basename))
        if basename in autoloadlist:
            conf = '%s/%s.conf' % (d.getVar('modulesloaddir'), basename)
            name = '%s%s' % (dvar, conf)
            os.makedirs(os.path.dirname(name), exist_ok=True)
            with open(name, 'w') as f:
                if autoload:
                    for m in autoload.split():
                        f.write('%s\n' % m)
                else:
                    f.write('%s\n' % basename)
            conf2append = ' %s' % conf
            d.appendVar('FILES:%s' % pkg, conf2append)
            d.appendVar('CONFFILES:%s' % pkg, conf2append)
            postinst = d.getVar('pkg_postinst:%s' % pkg)
            if not postinst:
                bb.fatal("pkg_postinst:%s not defined" % pkg)
            postinst += d.getVar('autoload_postinst_fragment') % (autoload or basename)
            d.setVar('pkg_postinst:%s' % pkg, postinst)

        # Write out any modconf fragment
        modconflist = (d.getVar("KERNEL_MODULE_PROBECONF") or "").split()
        modconf = d.getVar('module_conf_%s' % basename)
        if modconf and basename in modconflist:
            conf = '%s/%s.conf' % (d.getVar('modprobedir'), basename)
            name = '%s%s' % (dvar, conf)
            os.makedirs(os.path.dirname(name), exist_ok=True)
            with open(name, 'w') as f:
                f.write("%s\n" % modconf)
            conf2append = ' %s' % conf
            d.appendVar('FILES:%s' % pkg, conf2append)
            d.appendVar('CONFFILES:%s' % pkg, conf2append)

        elif modconf:
            bb.error("Please ensure module %s is listed in KERNEL_MODULE_PROBECONF since module_conf_%s is set" % (basename, basename))

        if "description" in vals:
            old_desc = d.getVar('DESCRIPTION:' + pkg) or ""
            d.setVar('DESCRIPTION:' + pkg, old_desc + "; " + vals["description"])

        rdepends = bb.utils.explode_dep_versions2(d.getVar('RDEPENDS:' + pkg) or "")
        modinfo_deps = []
        if "depends" in vals and vals["depends"] != "":
            for dep in vals["depends"].split(","):
                on = legitimize_package_name(dep)
                dependency_pkg = format % on
                modinfo_deps.append(dependency_pkg)
        for dep in modinfo_deps:
            if not dep in rdepends:
                rdepends[dep] = []
        d.setVar('RDEPENDS:' + pkg, bb.utils.join_deps(rdepends, commasep=False))

        # Avoid automatic -dev recommendations for modules ending with -dev.
        d.setVarFlag('RRECOMMENDS:' + pkg, 'nodeprrecs', 1)

        # Provide virtual package without postfix
        providevirt = d.getVar('KERNEL_MODULE_PROVIDE_VIRTUAL')
        if providevirt == "1":
           postfix = format.split('%s')[1]
           d.setVar('RPROVIDES:' + pkg, pkg.replace(postfix, ''))

    kernel_package_name = d.getVar("KERNEL_PACKAGE_NAME") or "kernel"
    kernel_version = d.getVar("KERNEL_VERSION")

    metapkg = d.getVar('KERNEL_MODULES_META_PACKAGE')
    splitmods = d.getVar('KERNEL_SPLIT_MODULES')
    postinst = d.getVar('pkg_postinst:modules')
    postrm = d.getVar('pkg_postrm:modules')

    if splitmods != '1':
        d.appendVar('FILES:' + metapkg, '%s %s %s/modules' %
            (d.getVar('modulesloaddir'), d.getVar('modprobedir'), d.getVar("nonarch_base_libdir")))
        d.appendVar('pkg_postinst:%s' % metapkg, postinst)
        d.prependVar('pkg_postrm:%s' % metapkg, postrm);
        return

    module_regex = r'^(.*)\.k?o(?:\.(gz|xz|zst))?$'

    module_pattern_prefix = d.getVar('KERNEL_MODULE_PACKAGE_PREFIX')
    module_pattern_suffix = d.getVar('KERNEL_MODULE_PACKAGE_SUFFIX')
    module_pattern = module_pattern_prefix + kernel_package_name + '-module-%s' + module_pattern_suffix

    modules = do_split_packages(d, root='${nonarch_base_libdir}/modules', file_regex=module_regex, output_pattern=module_pattern, description='%s kernel module', postinst=postinst, postrm=postrm, recursive=True, hook=frob_metadata, extra_depends='%s-%s' % (kernel_package_name, kernel_version))
    if modules:
        d.appendVar('RDEPENDS:' + metapkg, ' '+' '.join(modules))

split_kernel_module_packages(d)

def do_split_packages(d, root, file_regex, output_pattern, description, postinst=None, recursive=False, hook=None, extra_depends=None, aux_files_pattern=None, postrm=None, allow_dirs=False, prepend=False, match_path=False, aux_files_pattern_verbatim=None, allow_links=False, summary=None):
    """
    Used in .bb files to split up dynamically generated subpackages of a
    given package, usually plugins or modules.

    Arguments:
    root           -- the path in which to search
    file_regex     -- regular expression to match searched files. Use
                      parentheses () to mark the part of this expression
                      that should be used to derive the module name (to be
                      substituted where %s is used in other function
                      arguments as noted below)
    output_pattern -- pattern to use for the package names. Must include %s.
    description    -- description to set for each package. Must include %s.
    postinst       -- postinstall script to use for all packages (as a
                      string)
    recursive      -- True to perform a recursive search - default False
    hook           -- a hook function to be called for every match. The
                      function will be called with the following arguments
                      (in the order listed):
                        f: full path to the file/directory match
                        pkg: the package name
                        file_regex: as above
                        output_pattern: as above
                        modulename: the module name derived using file_regex
    extra_depends  -- extra runtime dependencies (RDEPENDS) to be set for
                      all packages. The default value of None causes a
                      dependency on the main package (${PN}) - if you do
                      not want this, pass '' for this parameter.
    aux_files_pattern -- extra item(s) to be added to FILES for each
                      package. Can be a single string item or a list of
                      strings for multiple items.  Must include %s.
    postrm         -- postrm script to use for all packages (as a string)
    allow_dirs     -- True allow directories to be matched - default False
    prepend        -- if True, prepend created packages to PACKAGES instead
                      of the default False which appends them
    match_path     -- match file_regex on the whole relative path to the
                      root rather than just the file name
    aux_files_pattern_verbatim -- extra item(s) to be added to FILES for
                      each package, using the actual derived module name
                      rather than converting it to something legal for a
                      package name. Can be a single string item or a list
                      of strings for multiple items. Must include %s.
    allow_links    -- True to allow symlinks to be matched - default False
    summary        -- Summary to set for each package. Must include %s;
                      defaults to description if not set.

    """

    dvar = d.getVar('PKGD')
    root = d.expand(root)
    output_pattern = d.expand(output_pattern)
    extra_depends = d.expand(extra_depends)

    # If the root directory doesn't exist, don't error out later but silently do
    # no splitting.
    if not os.path.exists(dvar + root):
        return []

    ml = d.getVar("MLPREFIX")
    if ml:
        if not output_pattern.startswith(ml):
            output_pattern = ml + output_pattern

        newdeps = []
        for dep in (extra_depends or "").split():
            if dep.startswith(ml):
                newdeps.append(dep)
            else:
                newdeps.append(ml + dep)
        if newdeps:
            extra_depends = " ".join(newdeps)


    packages = d.getVar('PACKAGES').split()
    split_packages = set()

    if postinst:
        postinst = '#!/bin/sh\n' + postinst + '\n'
    if postrm:
        postrm = '#!/bin/sh\n' + postrm + '\n'
    if not recursive:
        objs = os.listdir(dvar + root)
    else:
        objs = []
        for walkroot, dirs, files in os.walk(dvar + root):
            for file in files:
                relpath = os.path.join(walkroot, file).replace(dvar + root + '/', '', 1)
                if relpath:
                    objs.append(relpath)

    if extra_depends == None:
        extra_depends = d.getVar("PN")

    if not summary:
        summary = description

    for o in sorted(objs):
        import re, stat
        if match_path:
            m = re.match(file_regex, o)
        else:
            m = re.match(file_regex, os.path.basename(o))

        if not m:
            continue
        f = os.path.join(dvar + root, o)
        mode = os.lstat(f).st_mode
        if not (stat.S_ISREG(mode) or (allow_links and stat.S_ISLNK(mode)) or (allow_dirs and stat.S_ISDIR(mode))):
            continue
        on = oe.package.legitimize_package_name(m.group(1))
        pkg = output_pattern % on
        split_packages.add(pkg)
        if not pkg in packages:
            if prepend:
                packages = [pkg] + packages
            else:
                packages.append(pkg)
        oldfiles = d.getVar('FILES:' + pkg)
        newfile = os.path.join(root, o)
        # These names will be passed through glob() so if the filename actually
        # contains * or ? (rare, but possible) we need to handle that specially
        newfile = newfile.replace('*', '[*]')
        newfile = newfile.replace('?', '[?]')
        if not oldfiles:
            the_files = [newfile]
            if aux_files_pattern:
                if type(aux_files_pattern) is list:
                    for fp in aux_files_pattern:
                        the_files.append(fp % on)
                else:
                    the_files.append(aux_files_pattern % on)
            if aux_files_pattern_verbatim:
                if type(aux_files_pattern_verbatim) is list:
                    for fp in aux_files_pattern_verbatim:
                        the_files.append(fp % m.group(1))
                else:
                    the_files.append(aux_files_pattern_verbatim % m.group(1))
            d.setVar('FILES:' + pkg, " ".join(the_files))
        else:
            d.setVar('FILES:' + pkg, oldfiles + " " + newfile)
        if extra_depends != '':
            d.appendVar('RDEPENDS:' + pkg, ' ' + extra_depends)
        if not d.getVar('DESCRIPTION:' + pkg):
            d.setVar('DESCRIPTION:' + pkg, description % on)
        if not d.getVar('SUMMARY:' + pkg):
            d.setVar('SUMMARY:' + pkg, summary % on)
        if postinst:
            d.setVar('pkg_postinst:' + pkg, postinst)
        if postrm:
            d.setVar('pkg_postrm:' + pkg, postrm)
        if callable(hook):
            hook(f, pkg, file_regex, output_pattern, m.group(1))

    d.setVar('PACKAGES', ' '.join(packages))
    return list(split_packages)

def legitimize_package_name(s):
    return oe.package.legitimize_package_name(s)