propellor (0.3.0) unstable; urgency=medium

  * ipv6to4: Ensure interface is brought up automatically on boot.
  * Enabling unattended upgrades now ensures that cron is installed and
    running to perform them.
  * Properties can be scheduled to only be checked after a given time period.
  * Fix bootstrapping of dependencies.
  * Fix compilation on Debian stable.
  * Include security updates in sources.list for stable and testing.
  * Use ssh connection caching, especially when bootstrapping.
  * Properties now run in a Propellor monad, which provides access to
    attributes of the host.

# imported from the archive

1 files changed, 34 insertions, 0 deletions

diff --git a/Propellor/Property/Hostname.hs b/Propellor/Property/Hostname.hs
new file mode 100644
index 00000000..03613ac9
--- /dev/null
+++ b/Propellor/Property/Hostname.hs
@@ -0,0 +1,34 @@
+module Propellor.Property.Hostname where
+
+import Propellor
+import qualified Propellor.Property.File as File
+
+-- | Ensures that the hostname is set to the HostAttr value.
+-- Configures both /etc/hostname and the current hostname.
+--
+-- When the hostname is a FQDN, also configures /etc/hosts,
+-- with an entry for 127.0.1.1, which is standard at least on Debian
+-- to set the FDQN (127.0.0.1 is localhost).
+sane :: Property
+sane = Property ("sane hostname") (ensureProperty . setTo =<< getHostName)
+
+setTo :: HostName -> Property
+setTo hn = combineProperties desc go
+	`onChange` cmdProperty "hostname" [basehost]
+  where
+	desc = "hostname " ++ hn
+	(basehost, domain) = separate (== '.') hn
+
+	go = catMaybes
+		[ Just $ "/etc/hostname" `File.hasContent` [basehost]
+		, if null domain
+			then Nothing 
+			else Just $ File.fileProperty desc
+				addhostline "/etc/hosts"
+		]
+	
+	hostip = "127.0.1.1"
+	hostline = hostip ++ "\t" ++ hn ++ " " ++ basehost
+
+	addhostline ls = hostline : filter (not . hashostip) ls
+	hashostip l = headMaybe (words l) == Just hostip