propellor spin

1 files changed, 8 insertions, 0 deletions

diff --git a/src/Propellor/Property.hs b/src/Propellor/Property.hs
index 87136042..4b957317 100644
--- a/src/Propellor/Property.hs
+++ b/src/Propellor/Property.hs
@@ -145,6 +145,14 @@ h ! p = h & revert p
 
 infixl 1 !
 
+-- | Like (&), but adds the property as the first property of the host.
+-- Normally, property order should not matter, but this is useful
+-- when it does.
+(&^) :: IsProp p => Host -> p -> Host
+(Host hn ps is) &^ p = Host hn ([toProp p] ++ ps) (getInfo p <> is)
+
+infixl 1 &^
+
 -- Changes the action that is performed to satisfy a property. 
 adjustProperty :: Property -> (Propellor Result -> Propellor Result) -> Property
 adjustProperty p f = p { propertySatisfy = f (propertySatisfy p) }