Solves issue #689. Attribute Error.'None type' has no attribute 'format' ...

It seems the system does not syncronus update its internal information after a partitioning.
Two places are affected. Directly on filesystem.add_partition (the uuid of the new partition isn't available after the parted command)
and blockdevice.get_partition, where the list of partitions for the iterator might not be available in the query.
The patch places both sections under controlled loops, giving the system the chance to update the information.
Should be more controlled via application parameters

archinstall/lib/disk/blockdevice.py

@@ -1,9 +1,11 @@
 import os
 import json
 import logging
+import time
 from ..exceptions import DiskError
 from ..output import log
 from ..general import SysCommand
+from ..storage import storage
 
 GIGA = 2 ** 30
 
@@ -213,6 +215,15 @@ class BlockDevice:
 		self.part_cache = {}
 
 	def get_partition(self, uuid):
-		for partition in self:
-			if partition.uuid == uuid:
-				return partition
+		count = 0
+		while count < 5:
+			for partition in self:
+				if partition.uuid == uuid:
+					return partition
+			else:
+				log(f"uuid {uuid} not found. Waiting for {count +1} time",level=logging.DEBUG)
+				time.sleep(float(storage['arguments'].get('disk-sleep', 0.2)))
+				count +=1
+		else:
+			log(f"Could not find {uuid} in disk after 5 retries",level=logging.INFO)
+			raise DiskError(f"New partition {uuid} never showed up after adding new partition on {self}")

archinstall/lib/disk/filesystem.py

@@ -167,17 +167,21 @@ class Filesystem:
 			parted_string = f'{self.blockdevice.device} mkpart {partition_type} {start} {end}'
 
 		if self.parted(parted_string):
-			start_wait = time.time()
-
-			while previous_partition_uuids == {partition.uuid for partition in self.blockdevice.partitions.values()}:
-				if time.time() - start_wait > 10:
-					raise DiskError(f"New partition never showed up after adding new partition on {self} (timeout 10 seconds).")
-				time.sleep(0.025)
-
-			# Todo: Find a better way to detect if the new UUID of the partition has showed up.
-			#       But this will address (among other issues)
-			time.sleep(float(storage['arguments'].get('disk-sleep', 2.0))) # Let the kernel catch up with quick block devices (nvme for instance)
-			return self.blockdevice.get_partition(uuid=(previous_partition_uuids ^ {partition.uuid for partition in self.blockdevice.partitions.values()}).pop())
+			count = 0
+			while count < 10:
+				new_uuid = None
+				new_uuid_set = (previous_partition_uuids ^ {partition.uuid for partition in self.blockdevice.partitions.values()})
+				if len(new_uuid_set) > 0:
+					new_uuid = new_uuid_set.pop()
+				if new_uuid:
+					return self.blockdevice.get_partition(new_uuid)
+				else:
+					count += 1
+					log(f"Could not get uuid for partition. Waiting for the {count} time",level=logging.DEBUG)
+					time.sleep(float(storage['arguments'].get('disk-sleep', 0.2)))
+			else:
+				log("Add partition exiting due to excesive wait time",level=logging.INFO)
+				raise DiskError(f"New partition never showed up after adding new partition on {self}.")
 
 	def set_name(self, partition: int, name: str):
 		return self.parted(f'{self.blockdevice.device} name {partition + 1} "{name}"') == 0