nix: Show help when no arguments are given

Fixes #1464.
2017-07-14 13:44:45 +02:00
parent 38374a9d35
commit 112ff7833d
4 changed files with 14 additions and 10 deletions
@@ -146,7 +146,7 @@ bool Args::processArgs(const Strings & args, bool finish)
        res = true;
    }

-    if (finish && !expectedArgs.empty())
+    if (finish && !expectedArgs.empty() && !expectedArgs.front().optional)
        throw UsageError("more arguments are required");

    return res;