warn about failed actions

Main.hs

@@ -138,23 +138,27 @@ main = do
     E.exitSuccess
 
   run <- runAction <$> loadSettings opts
-  run "Cookies" deleteCookies
-  run "QuotaManager" deleteQuotaOrigins
-  run "IndexedDB" deleteIndexedDB
-  run "LocalStorage" deleteLocalStorage
-  run "SessionStorage" deleteSessionStorage
+  numFailures <- sum <$> mapM (uncurry run) actions
+
+  if numFailures == 0
+    then E.exitSuccess
+    else do
+      putStrLn ("\nwarning: " <> show numFailures <> " actions have failed")
+      E.exitWith (E.ExitFailure numFailures)
 
 
 -- | Runs an 'Action' and pretty-prints the results
-runAction :: Settings -> Text -> Action Result -> IO ()
+runAction :: Settings -> Text -> Action Result -> IO Int
 runAction settings name x = do
   a <- BE.try $ runExceptT (runReaderT x settings)
   case a of
-    Right (Right res) -> printResult res
-    Right (Left msg) -> printFailed msg
-    Left (err :: BE.IOException) -> printFailed (T.pack $ BE.displayException err)
+    Right (Right res) -> printResult res >> return 0
+    Right (Left msg) -> printFailed msg  >> return 1
+    Left (err :: BE.IOException) ->
+      printFailed (T.pack $ BE.displayException err) >> return 1
   where
-    printFailed msg = T.putStrLn ("- " <> name <> " cleaning failed:\n  " <> msg)
+    printFailed msg =
+      T.putStrLn ("- " <> name <> " cleaning failed:\n  " <> msg)
     printResult (n, bad)
       | n > 0 = do
         T.putStrLn ("- " <> name <> ": " <> verb <>
@@ -168,6 +172,16 @@ runAction settings name x = do
 
 -- * Cleaning actions
 
+-- | List of actions and their names
+actions :: [(Text, Action Result)]
+actions =
+  [ ("Cookies",        deleteCookies)
+  , ("QuotaManager",   deleteQuotaOrigins)
+  , ("IndexedDB",      deleteIndexedDB)
+  , ("LocalStorage",   deleteLocalStorage)
+  , ("SessionStorage", deleteSessionStorage)
+  ]
+
 -- | Deletes records in the Cookies database
 deleteCookies :: Action Result
 deleteCookies = do