diff --git a/totptool.nim b/totptool.nim
index 71b1526..b4272a2 100644
--- a/totptool.nim
+++ b/totptool.nim
@@ -38,54 +38,55 @@ proc writeVersion() =
   echo gitlog
   quit 1
 
-var
-  totpRoot: string = getHomeDir() / "life" / "crypto" / "totp"
-  command: string
-  args: seq[string]
+when isMainModule:
+  var
+    totpRoot: string = getHomeDir() / "life" / "crypto" / "totp"
+    command: string
+    args: seq[string]
 
-for kind, key, val in getopt():
-  case kind
-  of cmdArgument:
-    if command == nil:
-      command = key
-    else:
-      args = args & key
-
-  of cmdLongOption, cmdShortOption:
-    case key
-    of "help", "h":
-      case command
-      of "code":
-        code.help()
-      of "newSecret":
-        newSecret.help()
-      of "ls":
-        ls.help()
+  for kind, key, val in getopt():
+    case kind
+    of cmdArgument:
+      if command == nil:
+        command = key
       else:
-        writeHelp()
+        args = args & key
 
-    of "version", "v": writeVersion()
-    of "root", "r":
-      totpRoot = val
-    else: discard
+    of cmdLongOption, cmdShortOption:
+      case key
+      of "help", "h":
+        case command
+        of "code":
+          code.help()
+        of "newSecret":
+          newSecret.help()
+        of "ls":
+          ls.help()
+        else:
+          writeHelp()
 
-  of cmdEnd: assert(false) # cannot happen
+      of "version", "v": writeVersion()
+      of "root", "r":
+        totpRoot = val
+      else: discard
 
-if command == nil:
-  writeHelp()
-else: discard
+    of cmdEnd: assert(false) # cannot happen
 
-if not existsDir(totpRoot):
-  totpRoot.createDir
-  echo "Created totp root " & totpRoot
+  if command == nil:
+    writeHelp()
+  else: discard
 
-case command
-of "code":
-  code(totpRoot, args)
-of "newSecret":
-  newSecret(totpRoot, args)
-of "ls":
-  ls(totpRoot, args)
-else:
-  echo "Command " & command & " not found."
-  writeHelp()
+  if not existsDir(totpRoot):
+    totpRoot.createDir
+    echo "Created totp root " & totpRoot
+
+  case command
+  of "code":
+    code(totpRoot, args)
+  of "newSecret":
+    newSecret(totpRoot, args)
+  of "ls":
+    ls(totpRoot, args)
+  else:
+    echo "Command " & command & " not found."
+    writeHelp()