Extlinux now works on virtualbox

Raise error when trying to install grub on unpartitioned disks

common/tasks/boot.py

@@ -126,5 +126,6 @@ class InstallExtLinux(Task):
 	def run(cls, info):
 		from common.tools import log_check_call
 		log_check_call(['/usr/sbin/chroot', info.root,
-		                '/usr/bin/extlinux',
-		                '--install', '/boot'])
+		                '/usr/sbin/extlinux-install', info.volume.device_path])
+		log_check_call(['/usr/sbin/chroot', info.root,
+		                '/usr/sbin/extlinux-update'])

providers/virtualbox/__init__.py

@@ -20,6 +20,9 @@ def validate_manifest(data, validator, error):
 	schema_path = os.path.normpath(os.path.join(os.path.dirname(__file__), 'manifest-schema.json'))
 	validator(data, schema_path)
 
+	if data['volume']['partitions']['type'] == 'none' and data['system']['bootloader'] != 'extlinux':
+			error('Only extlinux can boot from unpartitioned disks', ['system', 'bootloader'])
+
 
 def resolve_tasks(tasklist, manifest):
 	import common.task_sets

providers/virtualbox/manifest-schema.json

@@ -16,7 +16,7 @@
 			"properties": {
 				"bootloader": {
 					"type": "string",
-					"enum": ["grub"]
+					"enum": ["grub", "extlinux"]
 				}
 			}
 		},