Add a --sort flag to hath and document/test why it was needed after all.

[hath.git] / src / Main.hs

diff --git a/src/Main.hs b/src/Main.hs
index 174efe28258e608ac48c488ae8225522699b7057..4774c8778e5904a42378e53e2673ef112f3cdef7 100644 (file)
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -3,6 +3,7 @@ where
 
 import Control.Monad (when)
 import Data.List ((\\), intercalate)
+import qualified Data.List as List (sort)
 import Data.Maybe (catMaybes, isNothing)
 import System.Exit (ExitCode( ExitFailure ), exitWith)
 import System.IO (stderr, hPutStrLn)
@@ -20,8 +21,9 @@ import Cidr (
   min_octet2,
   min_octet3,
   min_octet4 )
+import qualified Cidr ( normalize )
 import CommandLine(
-  Args( Regexed, Reduced, Duped, Diffed, Listed, barriers ),
+  Args( Regexed, Reduced, Duped, Diffed, Listed, barriers, normalize, sort ),
   get_args )
 import ExitCodes ( exit_invalid_cidr )
 import Octet ()
@@ -126,8 +128,11 @@ main = do
       let cidrs' = combine_all valid_cidrs
       let regexes = map (cidr_to_regex (barriers args)) cidrs'
       putStrLn $ alternate regexes
-    Reduced{} ->
-      mapM_ print (combine_all valid_cidrs)
+    Reduced{} -> do
+      -- Pre-normalize all CIDRs if the user asked for it.
+      let nrml_func = if (normalize args) then Cidr.normalize else id
+      let sort_func = if (sort args) then List.sort else id :: [Cidr] -> [Cidr]
+      mapM_ (print . nrml_func) (sort_func $ combine_all valid_cidrs)
     Duped{} ->
        mapM_ print dupes
        where