code: def _log_exceptions(exc: Exception) -> Optional[int]:
      """Try to log some known exceptions, that are not DVCExceptions."""
      from dvc.utils import error_link, format_link
  
      if isinstance(exc, OSError):
          import errno
  
          if exc.errno == errno.EMFILE:
              logger.exception(
                  (
                      "too many open files, please visit "
                      "%s to see how to handle this problem"
                  ),
                  error_link("many-files"),
                  extra={"tb_only": True},
              )
          else:
              _log_unknown_exceptions()
          return None
  
      from dvc.fs import AuthError, ConfigError, RemoteMissingDepsError
  
      if isinstance(exc, RemoteMissingDepsError):
          from dvc import PKG
  
          proto = exc.protocol
          by_pkg = {
              "pip": f"pip install 'dvc[{proto}]'",
              "conda": f"conda install -c conda-forge dvc-{proto}",
          }
  
          if PKG in by_pkg:
              link = format_link("https://dvc.org/doc/install")
              cmd = by_pkg.get(PKG)
              hint = (
                  "To install dvc with those dependencies, run:\n"
                  "\n"
                  f"\t{cmd}\n"
                  "\n"
                  f"See {link} for more info."
              )
          else:
              link = format_link(
                  "https://github.com/iterative/dvc/issues"
              )
              hint = f"\nPlease report this bug to {link}. Thank you!"
  
          logger.exception(
              "URL '%s' is supported but requires these missing dependencies: %s. %s",
              exc.url,
              exc.missing_deps,
              hint,
              extra={"tb_only": True},
          )
          return None
  
      if isinstance(exc, (AuthError, ConfigError)):
          link = format_link("https://man.dvc.org/remote/modify")
          logger.exception("configuration error")
          logger.exception(
              "%s\nLearn more about configuration settings at %s.",
              exc,
              link,
              extra={"tb_only": True},
          )
          return 251
  
      from dvc_data.hashfile.cache import DiskError
  
      if isinstance(exc, DiskError):
          from dvc.utils import relpath
  
          directory = relpath(exc.directory)
          logger.exception(
              (
                  "Could not open pickled '%s' cache.\n"
                  "Remove the '%s' directory and then retry this command."
                  "\nSee %s for more information."
              ),
              exc.type,
              directory,
              error_link("pickle"),
              extra={"tb_only": True},
          )
          return None
  
      from dvc_data.hashfile.build import IgnoreInCollectedDirError
  
      if isinstance(exc, IgnoreInCollectedDirError):
          logger.exception("")
          return None
  
      _log_unknown_exceptions()
      return None
  
file_path: dvc/dvc/cli/__init__.py
imports: import logging
  import sys
  from typing import Optional
  from dvc.log import logger
label_desc: Use image node_id 3 for calling a global function with example usage: _log_exceptions(exc) and returns: None, None, None, int, None, None