Added git revision tracking

Added `transaqConnector_gitrev` field to `Version.hs` to store git revision.

src/Version.hs

@@ -1,11 +1,14 @@
+{-# LANGUAGE TemplateHaskell #-}
 module Version
   (
     transaqConnectorVersion,
-    transaqConnectorVersionText
+    transaqConnectorVersionText,
+    transaqConnector_gitrev
   ) where
 
 import qualified Data.Text               as T
 import           Data.Version
+import           Development.GitRev
 import           Paths_transaq_connector
 
 
@@ -15,3 +18,13 @@ transaqConnectorVersion = version
 transaqConnectorVersionText :: T.Text
 transaqConnectorVersionText = T.pack $ showVersion version
 
+transaqConnector_gitrev :: String
+transaqConnector_gitrev = concat [ "transaq-connector-",
+                            $(gitBranch),
+                            "@",
+                            $(gitHash),
+                            dirty ]
+  where
+    dirty | $(gitDirty) = "+"
+          | otherwise   = ""
+

transaq-connector.cabal

@@ -67,6 +67,7 @@ executable transaq-connector
                      , barbies
                      , xeno
                      , megaparsec
+                     , gitrev
   extra-lib-dirs:      lib
   ghc-options:         -Wall
                        -Wcompat