From a355c72bd6be5fdbfeb3be843818922939d2f94a Mon Sep 17 00:00:00 2001
From: Daniel Gröber <dxld@darkboxed.org>
Date: Sun, 14 Oct 2018 01:37:46 +0200
Subject: Add 'allUnits' convenience query

---
 lib/Distribution/Helper.hs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'lib/Distribution/Helper.hs')

diff --git a/lib/Distribution/Helper.hs b/lib/Distribution/Helper.hs
index ad77eb3..4c51de2 100644
--- a/lib/Distribution/Helper.hs
+++ b/lib/Distribution/Helper.hs
@@ -46,6 +46,9 @@ module Distribution.Helper (
   , UnitInfo(..)
   , unitQuery
 
+  -- ** Convenience Queries
+  , allUnits
+
   -- * Query environment
   , QueryEnv -- abstract
   , mkQueryEnv
@@ -268,7 +271,9 @@ projectUnits = Query $ \qe@QueryEnv{qeDistDir} ->
 unitQuery          :: Unit -> Query pt UnitInfo
 unitQuery u = Query $ \qe -> getUnitInfo qe u
 
-
+-- | Get information on all units in a project.
+allUnits :: (UnitInfo -> a) -> Query pt [a]
+allUnits f = map f <$> (mapM unitQuery =<< projectUnits)
 
 -- | Run @cabal configure@
 reconfigure :: MonadIO m
-- 
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