Version functions

Also cleaned up a bit

libatrade.cabal

@@ -26,6 +26,8 @@ library
                      , ATrade.Broker.TradeSinks.TelegramTradeSink
                      , ATrade.Broker.TradeSinks.ZMQTradeSink
                      , ATrade.Util
+                     , ATrade
+  other-modules:       Paths_libatrade
   build-depends:       base >= 4.7 && < 5
                      , time
                      , datetime
@@ -52,16 +54,9 @@ library
                      , http-client-tls
                      , utf8-string
                      , scientific
+                     , gitrev
   default-language:    Haskell2010
 
-executable libatrade-exe
-  hs-source-dirs:      app
-  main-is:             Main.hs
-  ghc-options:         -threaded -rtsopts -with-rtsopts=-N -Wincomplete-patterns
-  build-depends:       base
-                     , libatrade
-                     , pretty-hex
-  default-language:    Haskell2010
 
 test-suite libatrade-test
   type:                exitcode-stdio-1.0

src/ATrade.hs

@@ -0,0 +1,25 @@
+{-# LANGUAGE TemplateHaskell #-}
+
+module ATrade
+(
+  libatrade_version
+) where
+import           Data.Version
+import           Paths_libatrade
+
+import           Development.GitRev
+
+libatrade_version :: Version
+libatrade_version = version
+
+libatrade_gitrev :: String
+libatrade_gitrev = concat [ "libatrade-",
+                            $(gitBranch),
+                            "@",
+                            $(gitHash),
+                            dirty ]
+  where
+    dirty | $(gitDirty) = "+"
+          | otherwise   = ""
+
+