1 files changed, 223 insertions, 0 deletions

diff --git a/archinstall/lib/disk/blockdevice.py b/archinstall/lib/disk/blockdevice.py
new file mode 100644
index 00000000..d278fa2e
--- /dev/null
+++ b/archinstall/lib/disk/blockdevice.py
@@ -0,0 +1,223 @@
+import os
+import json
+import logging
+from ..output import log
+from ..general import SysCommand
+
+class BlockDevice:
+	def __init__(self, path, info=None):
+		if not info:
+			# If we don't give any information, we need to auto-fill it.
+			# Otherwise any subsequent usage will break.
+			info = all_disks()[path].info
+
+		self.path = path
+		self.info = info
+		self.keep_partitions = True
+		self.part_cache = {}
+
+		# TODO: Currently disk encryption is a BIT misleading.
+		#       It's actually partition-encryption, but for future-proofing this
+		#       I'm placing the encryption password on a BlockDevice level.
+
+	def __repr__(self, *args, **kwargs):
+		return f"BlockDevice({self.device_or_backfile}, size={self.size}GB, free_space={'+'.join(part[2] for part in self.free_space)}, bus_type={self.bus_type})"
+
+	def __iter__(self):
+		for partition in self.partitions:
+			yield self.partitions[partition]
+
+	def __getitem__(self, key, *args, **kwargs):
+		if key not in self.info:
+			raise KeyError(f'{self} does not contain information: "{key}"')
+		return self.info[key]
+
+	def __len__(self):
+		return len(self.partitions)
+
+	def __lt__(self, left_comparitor):
+		return self.path < left_comparitor.path
+
+	def json(self):
+		"""
+		json() has precedence over __dump__, so this is a way
+		to give less/partial information for user readability.
+		"""
+		return self.path
+
+	def __dump__(self):
+		return {
+			self.path : {
+				'partuuid' : self.uuid,
+				'wipe' : self.info.get('wipe', None),
+				'partitions' : [part.__dump__() for part in self.partitions.values()]
+			}
+		}
+
+	@property
+	def partition_type(self):
+		output = json.loads(SysCommand(f"lsblk --json -o+PTTYPE {self.path}").decode('UTF-8'))
+	
+		for device in output['blockdevices']:
+			return device['pttype']
+
+	@property
+	def device_or_backfile(self):
+		"""
+		Returns the actual device-endpoint of the BlockDevice.
+		If it's a loop-back-device it returns the back-file,
+		For other types it return self.device
+		"""
+		if self.info['type'] == 'loop':
+			for drive in json.loads(SysCommand(['losetup', '--json']).decode('UTF_8'))['loopdevices']:
+				if not drive['name'] == self.path:
+					continue
+
+				return drive['back-file']
+		else:
+			return self.device
+
+	@property
+	def device(self):
+		"""
+		Returns the device file of the BlockDevice.
+		If it's a loop-back-device it returns the /dev/X device,
+		If it's a ATA-drive it returns the /dev/X device
+		And if it's a crypto-device it returns the parent device
+		"""
+		if "type" not in self.info:
+			raise DiskError(f'Could not locate backplane info for "{self.path}"')
+
+		if self.info['type'] in ['disk','loop']:
+			return self.path
+		elif self.info['type'][:4] == 'raid':
+			# This should catch /dev/md## raid devices
+			return self.path
+		elif self.info['type'] == 'crypt':
+			if 'pkname' not in self.info:
+				raise DiskError(f'A crypt device ({self.path}) without a parent kernel device name.')
+			return f"/dev/{self.info['pkname']}"
+		else:
+			log(f"Unknown blockdevice type for {self.path}: {self.info['type']}", level=logging.DEBUG)
+
+	# 	if not stat.S_ISBLK(os.stat(full_path).st_mode):
+	# 		raise DiskError(f'Selected disk "{full_path}" is not a block device.')
+
+	@property
+	def partitions(self):
+		from .filesystem import Partition
+		SysCommand(['partprobe', self.path])
+
+		result = SysCommand(['/usr/bin/lsblk', '-J', self.path])
+
+		if b'not a block device' in result:
+			raise DiskError(f'Can not read partitions off something that isn\'t a block device: {self.path}')
+
+		if not result[:1] == b'{':
+			raise DiskError('Error getting JSON output from:', f'/usr/bin/lsblk -J {self.path}')
+
+		r = json.loads(result.decode('UTF-8'))
+		if len(r['blockdevices']) and 'children' in r['blockdevices'][0]:
+			root_path = f"/dev/{r['blockdevices'][0]['name']}"
+			for part in r['blockdevices'][0]['children']:
+				part_id = part['name'][len(os.path.basename(self.path)):]
+				if part_id not in self.part_cache:
+					# TODO: Force over-write even if in cache?
+					if part_id not in self.part_cache or self.part_cache[part_id].size != part['size']:
+						self.part_cache[part_id] = Partition(root_path + part_id, self, part_id=part_id, size=part['size'])
+
+		return {k: self.part_cache[k] for k in sorted(self.part_cache)}
+
+	@property
+	def partition(self):
+		all_partitions = self.partitions
+		return [all_partitions[k] for k in all_partitions]
+
+	@property
+	def partition_table_type(self):
+		from .filesystem import GPT
+		return GPT
+
+	@property
+	def uuid(self):
+		log('BlockDevice().uuid is untested!', level=logging.WARNING, fg='yellow')
+		"""
+		Returns the disk UUID as returned by lsblk.
+		This is more reliable than relying on /dev/disk/by-partuuid as
+		it doesn't seam to be able to detect md raid partitions.
+		"""
+		for partition in json.loads(SysCommand(f'lsblk -J -o+UUID {self.path}').decode('UTF-8'))['blockdevices']:
+			return partition.get('uuid', None)
+
+	def convert_size_to_gb(self, size):
+		units = {
+			'P' : lambda s : float(s) * 2048,
+			'T' : lambda s : float(s) * 1024,
+			'G' : lambda s : float(s),
+			'M' : lambda s : float(s) / 1024,
+			'K' : lambda s : float(s) / 2048,
+			'B' : lambda s : float(s) / 3072,
+		}
+		unit = size[-1]
+		return float(units.get(unit, lambda s : None)(size[:-1]))
+
+	@property
+	def size(self):
+		output = json.loads(SysCommand(f"lsblk --json -o+SIZE {self.path}").decode('UTF-8'))
+	
+		for device in output['blockdevices']:
+			return self.convert_size_to_gb(device['size'])
+
+	@property
+	def bus_type(self):
+		output = json.loads(SysCommand(f"lsblk --json -o+ROTA,TRAN {self.path}").decode('UTF-8'))
+	
+		for device in output['blockdevices']:
+			return device['tran']
+	
+	@property
+	def spinning(self):
+		output = json.loads(SysCommand(f"lsblk --json -o+ROTA,TRAN {self.path}").decode('UTF-8'))
+	
+		for device in output['blockdevices']:
+			return device['rota'] is True
+
+	@property
+	def free_space(self):
+		# NOTE: parted -s will default to `cancel` on prompt, skipping any partition
+		# that is "outside" the disk. in /dev/sr0 this is usually the case with Archiso,
+		# so the free will ignore the ESP partition and just give the "free" space.
+		# Doesn't harm us, but worth noting in case something weird happens.
+		for line in SysCommand(f"parted -s --machine {self.path} print free"):
+			if 'free' in (free_space := line.decode('UTF-8')):
+				_, start, end, size, *_ = free_space.strip('\r\n;').split(':')
+				yield (start, end, size)
+
+	@property
+	def largest_free_space(self):
+		info = None
+		for space_info in self.free_space:
+			if not info:
+				info = space_info
+			else:
+				# [-1] = size
+				if space_info[-1] > info[-1]:
+					info = space_info
+		return info
+
+	def has_partitions(self):
+		return len(self.partitions)
+
+	def has_mount_point(self, mountpoint):
+		for partition in self.partitions:
+			if self.partitions[partition].mountpoint == mountpoint:
+				return True
+		return False
+
+	def flush_cache(self):
+		self.part_cache = {}
+
+	def get_partition(self, uuid):
+		for partition in self:
+			if partition.uuid == uuid:
+				return partition
\ No newline at end of file