slightly better error message

diff --git a/src/allmydata/scripts/magic_folder_cli.py b/src/allmydata/scripts/magic_folder_cli.py
index 2b2aca38e60f4b204cc5ace3eca5af07810b58d2..08c47767101336d875e54d8070d1482a28da44f7 100644 (file)
--- a/src/allmydata/scripts/magic_folder_cli.py
+++ b/src/allmydata/scripts/magic_folder_cli.py
@@ -21,7 +21,7 @@ class CreateOptions(BasedirOptions):
         self.nickname = nickname
         self.localdir = localdir
         if self.nickname and not self.localdir:
-            raise usage.UsageError("must provide both")
+            raise usage.UsageError("If NICKNAME is specified then LOCALDIR must also be specified.")
         node_url_file = os.path.join(self['node-directory'], "node.url")
         self['node-url'] = open(node_url_file, "r").read().strip()