Be more picky about command-line args in upbc.

8 years ago · dd536fd567
parent 9cb10577fc
commit dd536fd567
1 changed files with 7 additions and 2 deletions
--- a/tools/upbc.lua
+++ b/tools/upbc.lua
@ -15,8 +15,13 @@ local upb = require "upb"
 local generate_upbdefs = false

 for _, argument in ipairs(arg) do
-  if argument == "--generate-upbdefs" then
-    generate_upbdefs = true
+  if argument.sub(argument, 1, 2) == "--" then
+    if argument == "--generate-upbdefs" then
+      generate_upbdefs = true
+    else
+      print("Unknown flag: " .. argument)
+      return 1
+    end
  else
    src = argument
  end