How to use the portage.os.path.isdir function in portage

if os.environ.get("SANDBOX_ON") == "1":
			# Make api consumers exempt from sandbox violations
			# when doing metadata cache updates.
			sandbox_write = os.environ.get("SANDBOX_WRITE", "").split(":")
			if self.depcachedir not in sandbox_write:
				sandbox_write.append(self.depcachedir)
				os.environ["SANDBOX_WRITE"] = \
					":".join(filter(None, sandbox_write))

		self.porttrees = list(self.settings.repositories.repoLocationList())

		# This is used as sanity check for aux_get(). If there is no
		# root eclass dir, we assume that PORTDIR is invalid or
		# missing. This check allows aux_get() to detect a missing
		# repository and return early by raising a KeyError.
		self._have_root_eclass_dir = os.path.isdir(
			os.path.join(self.settings.repositories.mainRepoLocation(), "eclass"))

		#if the portdbapi is "frozen", then we assume that we can cache everything (that no updates to it are happening)
		self.xcache = {}
		self.frozen = 0

		#Keep a list of repo names, sorted by priority (highest priority first).
		self._ordered_repo_name_list = tuple(reversed(self.repositories.prepos_order))

		self.auxdbmodule = self.settings.load_best_module("portdbapi.auxdbmodule")
		self.auxdb = {}
		self._pregen_auxdb = {}
		# If the current user doesn't have depcachedir write permission,
		# then the depcachedir cache is kept here read-only access.
		self._ro_auxdb = {}
		self._init_cache_dirs()

destdir = os.path.join(options.ED, "usr", "share", "doc",
		options.PF.lstrip(os.sep), desttree.lstrip(os.sep),
		options.doc_prefix.lstrip(os.sep), prefix).rstrip(os.sep)

	if not os.path.exists(fullpath):
		sys.stderr.write("!!! dohtml: %s does not exist\n" % fullpath)
		return False
	elif os.path.isfile(fullpath):
		ext = os.path.splitext(basename)[1][1:]
		if ext in options.allowed_exts or basename in options.allowed_files:
			dodir(destdir)
			dofile(fullpath, os.path.join(destdir, basename))
		elif warn_on_skipped_files and ext not in unwarned_skipped_extensions and basename not in unwarned_skipped_files:
			skipped_files.append(fullpath)
	elif options.recurse and os.path.isdir(fullpath) and \
	     basename not in options.disallowed_dirs:
		for i in _os.listdir(_unicode_encode(fullpath)):
			try:
				i = _unicode_decode(i, errors='strict')
			except UnicodeDecodeError:
				writemsg('dohtml: argument is not encoded as UTF-8: %s\n' %
					_unicode_decode(i), noiselevel=-1)
				sys.exit(1)
			pfx = basename
			if prefix:
				pfx = os.path.join(prefix, pfx)
			install(i, dirname, options, pfx)
	elif not options.recurse and os.path.isdir(fullpath):
		global skipped_directories
		skipped_directories.append(fullpath)
		return False

# Save then clear flags on dest.
						dflags = mydstat.st_flags
						if dflags != 0:
							bsd_chflags.lchflags(mydest, 0)

					if not os.access(mydest, os.W_OK):
						pkgstuff = pkgsplit(self.pkg)
						writemsg(_("\n!!! Cannot write to '%s'.\n") % mydest, noiselevel=-1)
						writemsg(_("!!! Please check permissions and directories for broken symlinks.\n"))
						writemsg(_("!!! You may start the merge process again by using ebuild:\n"))
						writemsg("!!! ebuild "+self.settings["PORTDIR"]+"/"+self.cat+"/"+pkgstuff[0]+"/"+self.pkg+".ebuild merge\n")
						writemsg(_("!!! And finish by running this: env-update\n\n"))
						return 1

					if stat.S_ISDIR(mydmode) or \
						(stat.S_ISLNK(mydmode) and os.path.isdir(mydest)):
						# a symlink to an existing directory will work for us; keep it:
						showMessage("--- %s/\n" % mydest)
						if bsd_chflags:
							bsd_chflags.lchflags(mydest, dflags)
					else:
						# a non-directory and non-symlink-to-directory.  Won't work for us.  Move out of the way.
						backup_dest = self._new_backup_path(mydest)
						msg = []
						msg.append("")
						msg.append("Installation of a directory is blocked by a file:")
						msg.append("  '%s'" % mydest)
						msg.append("This file will be renamed to a different name:")
						msg.append("  '%s'" % backup_dest)
						msg.append("")
						self._eerror("preinst", msg)
						if movefile(mydest, backup_dest,

def dodir(path):
	try:
		os.makedirs(path, 0o755)
	except OSError:
		if not os.path.isdir(path):
			raise
		os.chmod(path, 0o755)

for myfile, uris in filedict.items():
			filedict[myfile] = primaryuri_dict.get(myfile, []) + uris
	else:
		for myfile in filedict:
			filedict[myfile] += primaryuri_dict.get(myfile, [])

	can_fetch=True

	if listonly:
		can_fetch = False

	if can_fetch and not fetch_to_ro:
		try:
			_ensure_distdir(mysettings, mysettings["DISTDIR"])
		except PortageException as e:
			if not os.path.isdir(mysettings["DISTDIR"]):
				writemsg("!!! %s\n" % str(e), noiselevel=-1)
				writemsg(_("!!! Directory Not Found: DISTDIR='%s'\n") % mysettings["DISTDIR"], noiselevel=-1)
				writemsg(_("!!! Fetching will fail!\n"), noiselevel=-1)

	if can_fetch and \
		not fetch_to_ro and \
		not os.access(mysettings["DISTDIR"], os.W_OK):
		writemsg(_("!!! No write access to '%s'\n") % mysettings["DISTDIR"],
			noiselevel=-1)
		can_fetch = False

	distdir_writable = can_fetch and not fetch_to_ro
	failed_files = set()
	restrict_fetch_msg = False
	valid_hashes = set(get_valid_checksum_keys())
	valid_hashes.discard("size")

This function's handling of EEXIST errors makes it useful for atomic
	directory creation, in which multiple processes may be competing to
	create the same directory.
	"""

	created_dir = False

	try:
		os.makedirs(dir_path)
		created_dir = True
	except OSError as oe:
		func_call = "makedirs('%s')" % dir_path
		if oe.errno in (errno.EEXIST,):
			pass
		else:
			if os.path.isdir(dir_path):
				# NOTE: DragonFly raises EPERM for makedir('/')
				# and that is supposed to be ignored here.
				# Also, sometimes mkdir raises EISDIR on FreeBSD
				# and we want to ignore that too (bug #187518).
				pass
			elif oe.errno == errno.EPERM:
				raise OperationNotPermitted(func_call)
			elif oe.errno == errno.EACCES:
				raise PermissionDenied(func_call)
			elif oe.errno == errno.EROFS:
				raise ReadOnlyFileSystem(func_call)
			else:
				raise
	if kwargs:
		perms_modified = apply_permissions(dir_path, **kwargs)
	else:

try:
			directory = _unicode_decode(directory,
				encoding=_encodings['fs'], errors='strict')
			# Now verify that we can also encode it.
			_unicode_encode(directory,
				encoding=_encodings['fs'], errors='strict')
		except UnicodeError:
			directory = _unicode_decode(directory,
				encoding=_encodings['fs'], errors='replace')
			raise SetConfigError(
				_("Directory path contains invalid character(s) for encoding '%s': '%s'") \
				% (_encodings['fs'], directory))

		vcs_dirs = [_unicode_encode(x, encoding=_encodings['fs']) for x in VCS_DIRS]
		if os.path.isdir(directory):
			directory = normalize_path(directory)

			for parent, dirs, files in os.walk(directory):
				try:
					parent = _unicode_decode(parent,
						encoding=_encodings['fs'], errors='strict')
				except UnicodeDecodeError:
					continue
				for d in dirs[:]:
					if d in vcs_dirs or d.startswith(b".") or d.endswith(b"~"):
						dirs.remove(d)
				for filename in files:
					try:
						filename = _unicode_decode(filename,
							encoding=_encodings['fs'], errors='strict')
					except UnicodeDecodeError:

f.close()

		if intersecting_repos:
			allow_directories = eapi_allows_directories_on_profile_level_and_repository_level(eapi) or \
				any(x in _portage1_profiles_allow_directories for x in layout_data['profile-formats'])
			compat_mode = not eapi_allows_directories_on_profile_level_and_repository_level(eapi) and \
				layout_data['profile-formats'] == ('portage-1-compat',)
			allow_parent_colon = any(x in _allow_parent_colon
				for x in layout_data['profile-formats'])
			current_formats = tuple(layout_data['profile-formats'])


		if compat_mode:
			offenders = _PORTAGE1_DIRECTORIES.intersection(os.listdir(currentPath))
			offenders = sorted(x for x in offenders
				if os.path.isdir(os.path.join(currentPath, x)))
			if offenders:
				warnings.warn(_(
					"\nThe selected profile is implicitly using the 'portage-1' format:\n"
					"\tprofile = %(profile_path)s\n"
					"But this repository is not using that format:\n"
					"\trepo = %(repo_name)s\n"
					"This will break in the future.  Please convert these dirs to files:\n"
					"\t%(files)s\n"
					"Or, add this line to the repository's layout.conf:\n"
					"\tprofile-formats = portage-1")
					% dict(profile_path=currentPath, repo_name=repo_loc,
						files='\n\t'.join(offenders)))

		parentsFile = os.path.join(currentPath, "parent")
		if exists_raise_eaccess(parentsFile):
			parents = grabfile(parentsFile)

if portage.util.noiselimit >= 0:
				out.einfo("GNU info directory index is up-to-date.")
		else:
			portage.util.writemsg_stdout("\n")
			if portage.util.noiselimit >= 0:
				out.einfo("Regenerating GNU info directory index...")

			dir_extensions = ("", ".gz", ".bz2")
			icount = 0
			badcount = 0
			errmsg = ""
			for inforoot in regen_infodirs:
				if inforoot == '':
					continue

				if not os.path.isdir(inforoot) or \
					not os.access(inforoot, os.W_OK):
					continue

				file_list = os.listdir(inforoot)
				file_list.sort()
				dir_file = os.path.join(inforoot, "dir")
				moved_old_dir = False
				processed_count = 0
				for x in file_list:
					if x.startswith(".") or \
						os.path.isdir(os.path.join(inforoot, x)):
						continue
					if x.startswith("dir"):
						skip = False
						for ext in dir_extensions:
							if x == "dir" + ext or \

if options.failure_log is not None:
		options.failure_log = normalize_path(
			os.path.abspath(options.failure_log))

		parent_dir = os.path.dirname(options.failure_log)
		if not (os.path.isdir(parent_dir) and
			os.access(parent_dir, os.W_OK|os.X_OK)):
			parser.error(("--failure-log '%s' parent is not a "
				"writable directory") % options.failure_log)

	if options.success_log is not None:
		options.success_log = normalize_path(
			os.path.abspath(options.success_log))

		parent_dir = os.path.dirname(options.success_log)
		if not (os.path.isdir(parent_dir) and
			os.access(parent_dir, os.W_OK|os.X_OK)):
			parser.error(("--success-log '%s' parent is not a "
				"writable directory") % options.success_log)

	if options.scheduled_deletion_log is not None:
		options.scheduled_deletion_log = normalize_path(
			os.path.abspath(options.scheduled_deletion_log))

		parent_dir = os.path.dirname(options.scheduled_deletion_log)
		if not (os.path.isdir(parent_dir) and
			os.access(parent_dir, os.W_OK|os.X_OK)):
			parser.error(("--scheduled-deletion-log '%s' parent is not a "
				"writable directory") % options.scheduled_deletion_log)

		if options.deletion_db is None:
			parser.error("--scheduled-deletion-log requires --deletion-db")