Mercurial > urweb

changeset 1808:90ebfac7e1a3

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Better error message for funky command lines
author Adam Chlipala <adam@chlipala.net>
date Sat, 18 Aug 2012 13:51:41 -0400
parents 15eb501a17d0
children b8fa7441e637
files src/main.mlton.sml
diffstat 1 files changed, 5 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/src/main.mlton.sml	Tue Aug 07 10:02:19 2012 -0400
+++ b/src/main.mlton.sml	Sat Aug 18 13:51:41 2012 -0400
@@ -169,7 +169,11 @@
         val job =
             case !sources of
                 [file] => file
-              | _ => printVersion ()
+              | _ =>
+                if List.exists (fn s => s <> "-version") args then
+                    raise Fail "Zero or multiple input files specified; only one is allowed."
+                else
+                    printVersion ()
     in
         case (!css, !demo, !tutorial) of
             (true, _, _) =>