Create git module as basis for further work.

builder/src/Git.hs

@@ -0,0 +1,16 @@
+module Git
+    ( checkInstalledGit
+    )
+    where
+
+
+import System.Directory (findExecutable)
+
+
+checkInstalledGit :: IO Bool
+checkInstalledGit = do
+   gitPath <- findExecutable "git"
+   return $ case gitPath of
+     Just _ -> True
+     Nothing -> False
+

gren.cabal

@@ -85,6 +85,7 @@ Executable gren
         File
         Generate
         Http
+        Git
         Reporting
         Reporting.Exit
         Reporting.Exit.Help