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Dir : //proc/self/root/opt/saltstack/salt/lib/python3.10/site-packages/salt/utils/extmods.py

"""
Functions used to sync external modules
"""

import logging
import os
import shutil

import salt.fileclient
import salt.utils.files
import salt.utils.hashutils
import salt.utils.path
import salt.utils.url
from salt.config import DEFAULT_HASH_TYPE

log = logging.getLogger(__name__)


def _list_emptydirs(rootdir):
    emptydirs = []
    for root, dirs, files in salt.utils.path.os_walk(rootdir):
        if not files and not dirs:
            emptydirs.append(root)
    return emptydirs


def _listdir_recursively(rootdir):
    file_list = []
    for root, dirs, files in salt.utils.path.os_walk(rootdir):
        for filename in files:
            relpath = os.path.relpath(root, rootdir).strip(".")
            file_list.append(os.path.join(relpath, filename))
    return file_list


def sync(
    opts,
    form,
    saltenv=None,
    extmod_whitelist=None,
    extmod_blacklist=None,
):
    """
    Sync custom modules into the extension_modules directory
    """
    if saltenv is None:
        saltenv = ["base"]

    if extmod_whitelist is None:
        extmod_whitelist = opts["extmod_whitelist"]
    elif isinstance(extmod_whitelist, str):
        extmod_whitelist = {form: extmod_whitelist.split(",")}
    elif not isinstance(extmod_whitelist, dict):
        log.error(
            "extmod_whitelist must be a string or dictionary: %s", extmod_whitelist
        )

    if extmod_blacklist is None:
        extmod_blacklist = opts["extmod_blacklist"]
    elif isinstance(extmod_blacklist, str):
        extmod_blacklist = {form: extmod_blacklist.split(",")}
    elif not isinstance(extmod_blacklist, dict):
        log.error(
            "extmod_blacklist must be a string or dictionary: %s", extmod_blacklist
        )

    if isinstance(saltenv, str):
        saltenv = saltenv.split(",")
    ret = []
    remote = set()
    source = salt.utils.url.create("_" + form)
    mod_dir = os.path.join(opts["extension_modules"], f"{form}")
    touched = False
    with salt.utils.files.set_umask(0o077):
        try:
            if not os.path.isdir(mod_dir):
                log.info("Creating module dir '%s'", mod_dir)
                try:
                    os.makedirs(mod_dir)
                except OSError:
                    log.error(
                        "Cannot create cache module directory %s. Check permissions.",
                        mod_dir,
                    )
            with salt.fileclient.get_file_client(opts) as fileclient:
                for sub_env in saltenv:
                    log.info("Syncing %s for environment '%s'", form, sub_env)
                    cache = []
                    log.info("Loading cache from %s, for %s", source, sub_env)
                    # Grab only the desired files (.py, .pyx, .so)
                    cache.extend(
                        fileclient.cache_dir(
                            source,
                            sub_env,
                            include_empty=False,
                            include_pat=r"E@\.(pyx?|so|zip)$",
                            exclude_pat=None,
                        )
                    )
                    local_cache_dir = os.path.join(
                        opts["cachedir"], "files", sub_env, f"_{form}"
                    )
                    log.debug("Local cache dir: '%s'", local_cache_dir)
                    for fn_ in cache:
                        relpath = os.path.relpath(fn_, local_cache_dir)
                        relname = os.path.splitext(relpath)[0].replace(os.sep, ".")
                        if (
                            extmod_whitelist
                            and form in extmod_whitelist
                            and relname not in extmod_whitelist[form]
                        ):
                            continue
                        if (
                            extmod_blacklist
                            and form in extmod_blacklist
                            and relname in extmod_blacklist[form]
                        ):
                            continue
                        remote.add(relpath)
                        dest = os.path.join(mod_dir, relpath)
                        log.info("Copying '%s' to '%s'", fn_, dest)
                        if os.path.isfile(dest):
                            # The file is present, if the sum differs replace it
                            hash_type = opts.get("hash_type", DEFAULT_HASH_TYPE)
                            src_digest = salt.utils.hashutils.get_hash(fn_, hash_type)
                            dst_digest = salt.utils.hashutils.get_hash(dest, hash_type)
                            if src_digest != dst_digest:
                                # The downloaded file differs, replace!
                                shutil.copyfile(fn_, dest)
                                ret.append(f"{form}.{relname}")
                        else:
                            dest_dir = os.path.dirname(dest)
                            if not os.path.isdir(dest_dir):
                                os.makedirs(dest_dir)
                            shutil.copyfile(fn_, dest)
                            ret.append(f"{form}.{relname}")

            touched = bool(ret)
            if opts["clean_dynamic_modules"] is True:
                current = set(_listdir_recursively(mod_dir))
                for fn_ in current - remote:
                    full = os.path.join(mod_dir, fn_)
                    if os.path.isfile(full):
                        touched = True
                        os.remove(full)
                # Cleanup empty dirs
                while True:
                    emptydirs = _list_emptydirs(mod_dir)
                    if not emptydirs:
                        break
                    for emptydir in emptydirs:
                        touched = True
                        shutil.rmtree(emptydir, ignore_errors=True)
        except Exception as exc:  # pylint: disable=broad-except
            log.error("Failed to sync %s module: %s", form, exc)
    return ret, touched