When unattendedUpgrades is enabled on an Unstable or Testing system, configure it to allow the upgrades.

Propellor/Property/Apt.hs

@@ -192,7 +192,9 @@ autoRemove = runApt ["-y", "autoremove"]
 unattendedUpgrades :: RevertableProperty
 unattendedUpgrades = RevertableProperty enable disable
   where
-	enable = setup True `before` Service.running "cron"
+	enable = setup True
+		`before` Service.running "cron"
+		`before` configure
 	disable = setup False
 
 	setup enabled = (if enabled then installed else removed) ["unattended-upgrades"]
@@ -204,6 +206,16 @@ unattendedUpgrades = RevertableProperty enable disable
 			| enabled = "true"
 			| otherwise = "false"
 	
+	configure = withOS "unattended upgrades configured" $ \o ->
+		case o of
+			-- the package defaults to only upgrading stable
+			(Just (System (Debian suite) _))
+				| not (isStable suite) -> ensureProperty $
+					"/etc/apt/apt.conf.d/50unattended-upgrades"
+						`File.containsLine`
+					("\t\"o=Debian,a="++showSuite suite++"\";")
+			_ -> noChange
+
 -- | Preseeds debconf values and reconfigures the package so it takes
 -- effect.
 reConfigure :: Package -> [(String, String, String)] -> Property

TODO

@@ -24,3 +24,8 @@
   the PrivData, and instead configured using the attr.
   Getting the ssh host key into the attr will allow automatically
   exporting it via DNS (SSHFP record)
+* Should be possible to generate a metapackage of all packages that
+  properties direct apt to install. Then any other packages can be
+  auto-removed. This would just be a matter of storing the apt-installed
+  packages in an Attr. Although not removing essential and base packages
+  could be problimatic.

debian/changelog

@@ -3,6 +3,8 @@ propellor (0.5.0) UNRELEASED; urgency=medium
   * Removed root domain records from SOA. Instead, use RootDomain
     when calling Dns.primary.
   * Dns primary and secondary properties are now revertable.
+  * When unattendedUpgrades is enabled on an Unstable or Testing system,
+    configure it to allow the upgrades.
 
  -- Joey Hess <joeyh@debian.org>  Sat, 19 Apr 2014 10:46:35 -0400