fix phases and their ordering

base/phase.py

@@ -1,18 +1,15 @@
-from functools import total_ordering
 
-@total_ordering
+
 class Phase(object):
-	description = None
+	def __init__(self, description):
+		self.description = description
 
-	def __init__(self):
-		pass
-
-	def __lt__(self, other):
+	def pos(self):
 		from common.phases import order
-		return order.index(self) < order.index(other)
+		return (i for i, phase in enumerate(order) if phase is self).next()
 
-	def __eq__(self, other):
-		return self == other
+	def __cmp__(self, other):
+		return self.pos() - other.pos()
 
 	def __str__(self):
 		return '{name}'.format(name=self.__class__.__name__)

common/phases.py

@@ -1,44 +1,24 @@
 from base import Phase
 
+preparation = Phase('Initializing connections, fetching data etc.')
+volume_creation = Phase('Creating the volume to bootstrap onto')
+volume_preparation = Phase('Formatting the bootstrap volume')
+volume_mounting = Phase('Mounting bootstrap volume')
+install_os = Phase('Installing the operating system')
+modify_system = Phase('Installing software, modifying configuration files etc.')
+clean_system = Phase('Removing sensitive data, temporary files and other leftovers')
+unmount_volume = Phase('Unmounting the bootstrap volume')
+register_image = Phase('Uploading/Registering with the provider')
+cleanup = Phase('Removing temporary files')
 
-class Preparation(Phase):
-	description = 'Initializing connections, fetching data etc.'
-
-class VolumeCreation(Phase):
-	description = 'Creating the volume to bootstrap onto'
-
-class VolumePreparation(Phase):
-	description = 'Formatting the bootstrap volume'
-
-class VolumeMounting(Phase):
-	description = 'Mounting bootstrap volume'
-
-class InstallOS(Phase):
-	description = 'Installing the operating system'
-
-class ModifySystem(Phase):
-	description = 'Installing software, modifying configuration files etc.'
-
-class CleanSystem(Phase):
-	description = 'Removing sensitive data, temporary files and other leftovers'
-
-class UnmountVolume(Phase):
-	description = 'Unmounting the bootstrap volume'
-
-class RegisterImage(Phase):
-	description = 'Uploading/Registering with the provider'
-
-class Cleanup(Phase):
-	description = 'Removing temporary files'
-
-order = [Preparation,
-         VolumeCreation,
-         VolumePreparation,
-         VolumeMounting,
-         InstallOS,
-         ModifySystem,
-         CleanSystem,
-         UnmountVolume,
-         RegisterImage,
-         Cleanup
+order = [preparation
+        ,volume_creation
+        ,volume_preparation
+        ,volume_mounting
+        ,install_os
+        ,modify_system
+        ,clean_system
+        ,unmount_volume
+        ,register_image
+        ,cleanup
         ]

plugins/admin_user/adminuser.py

@@ -6,7 +6,7 @@ from providers.ec2.tasks.host import CheckPackages
 
 class AddSudoPackage(Task):
 	description = 'Adding ``sudo\'\' to the image packages'
-	phase = phases.Preparation
+	phase = phases.preparation
 	after = [ImagePackages]
 	before = [CheckPackages]
 

plugins/build_metadata/buildmetadata.py

@@ -5,7 +5,7 @@ from providers.ec2.tasks.host import GetInfo
 
 class PrintInfo(Task):
 	description = 'Printing `info\' to the console'
-	phase = phases.InstallOS
+	phase = phases.install_os
 	after = [GetInfo]
 
 	def run(self, info):

providers/ec2/__init__.py

@@ -3,10 +3,10 @@ from manifest import Manifest
 
 def tasks(tasklist, manifest):
 	from tasks import packages
-	from tasks import ec2
+	from tasks import connection
 	from tasks import host
 	from tasks import ebs
 	tasklist.add(packages.HostPackages(), packages.ImagePackages(), host.CheckPackages(),
-	             ec2.GetCredentials(), host.GetInfo(), ec2.Connect())
+	             connection.GetCredentials(), host.GetInfo(), connection.Connect())
 	if manifest.volume['backing'] is 'ebs':
 		tasklist.add(ebs.CreateVolume())

providers/ec2/tasks/__init__.py

@@ -1 +1 @@
-__all__ = ['packages', 'ec2', 'host']
+__all__ = ['packages', 'connection', 'host', 'ec2']

providers/ec2/tasks/connection.py

@@ -4,7 +4,7 @@ from common import phases
 
 class GetCredentials(Task):
 	description = 'Getting AWS credentials'
-	phase = phases.Preparation
+	phase = phases.preparation
 
 	def run(self, info):
 		super(GetCredentials, self).run(info)
@@ -30,7 +30,7 @@ class GetCredentials(Task):
 
 class Connect(Task):
 	description = 'Connecting to EC2'
-	phase = phases.Preparation
+	phase = phases.preparation
 	after = [GetCredentials]
 	
 	def run(self, info):

providers/ec2/tasks/ebs.py

@@ -4,7 +4,7 @@ from connection import Connect
 
 class CreateVolume(Task):
 	description = 'Creating an EBS volume for bootstrapping'
-	phase = phases.VolumeCreation
+	phase = phases.volume_creation
 	after = [Connect]
 
 	def run(self, info):

providers/ec2/tasks/host.py

@@ -4,7 +4,7 @@ import packages
 
 class CheckPackages(Task):
 	description = 'Checking installed host packages'
-	phase = phases.Preparation
+	phase = phases.preparation
 	after = [packages.HostPackages, packages.ImagePackages]
 
 	def run(self, info):
@@ -21,7 +21,7 @@ class CheckPackages(Task):
 
 class GetInfo(Task):
 	description = 'Retrieving instance metadata'
-	phase = phases.Preparation
+	phase = phases.preparation
 
 	def run(self, info):
 		super(GetInfo, self).run(info)

providers/ec2/tasks/packages.py

@@ -4,7 +4,7 @@ from common import phases
 
 class HostPackages(Task):
 	description = 'Determining required host packages'
-	phase = phases.Preparation
+	phase = phases.preparation
 
 	def run(self, info):
 		super(HostPackages, self).run(info)
@@ -20,7 +20,7 @@ class HostPackages(Task):
 
 class ImagePackages(Task):
 	description = 'Determining required image packages'
-	phase = phases.Preparation
+	phase = phases.preparation
 
 	def run(self, info):
 		super(ImagePackages, self).run(info)