Support '-' on the command line as an aliase for /dev/stdout.

diff --git a/src/options.ml b/src/options.ml
index 4a7a0c7..d537d78 100644 (file)
--- a/src/options.ml
+++ b/src/options.ml
@@ -99,7 +99,6 @@ let spec = Arg.align
     "-doc-stats", Arg.Set(docstats),
     " Compute document statistics (performs full traversal)";
 
-
     "-v", Arg.Set(verbose), " verbose mode"; ] @
 IFNDEF NTRACE
 THEN [
@@ -110,12 +109,22 @@ THEN [
 ELSE []
 END
 
+let real_spec =
+  spec @ [
+    "-", Arg.Unit (fun () ->  anon_fun "-"), "";
+  ]
+
 
 let parse_cmdline() =
-  let _ = Arg.parse spec anon_fun usage_msg
+  let _ =
+    try
+      Arg.parse_argv Sys.argv real_spec anon_fun usage_msg;
+      if (!pos > 3 || !pos < 2) then raise (Arg.Bad "Invalid number of arguments")
+    with
+      Arg.Bad s | Arg.Help s ->
+        eprintf "%s\n" (Arg.usage_string spec usage_msg);
+        exit 1
   in
-  if (!pos > 3 || !pos < 2)
-  then begin Arg.usage spec usage_msg; exit 1 end;
   Logger.set_verbose !verbose