nailing-cargo: Spot if user forgot to specify command

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/nailing-cargo b/nailing-cargo
index dbad5b4c874f8456b206313686f1813718df9353..32da8fca69599398aff44688b16e8319207ece6a 100755 (executable)
--- a/nailing-cargo
+++ b/nailing-cargo
@@ -353,6 +353,8 @@ while (@ARGV && $ARGV[0] =~ m/^-/) {
   }
 }
 
+die "$self: need command to run\n" unless @ARGV || $noact;
+
 takelock();
 readnail();
 readorigs();