Correctly distinguish missing on_create argv from error

cmd/actionList.go

@@ -49,8 +49,10 @@ func actionList(source string, argv bool) {
 			if err != nil {
 				log.Fatalf("error: could not get argv for source %s action %s: %v", source, name, err)
 			}
+			if argv != nil {
 				actionArgv[name] = argv
 			}
+		}
 		for _, name := range actions {
 			fmt.Printf("%s %v\n", name, actionArgv[name])
 		}

core/action.go

@@ -1,6 +1,7 @@
 package core
 
 import (
+	"database/sql"
 	"database/sql/driver"
 	"encoding/json"
 )
@@ -57,6 +58,9 @@ func GetArgvForAction(db DB, source string, name string) ([]string, error) {
 	`, source, name)
 	var argv argList
 	err := rows.Scan(&argv)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
 	if err != nil {
 		return nil, err
 	}