From 75527e541460f04651f212570ec7902446923ebf Mon Sep 17 00:00:00 2001
From: Tobias Melson <code@tobias-melson.de>
Date: Sun, 5 Nov 2023 18:39:16 +0100
Subject: [PATCH] Abort if invalid command-line option is given

---
 src/config.go | 4 ++++
 test.sh       | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/config.go b/src/config.go
index ad922ad..fe34dc1 100644
--- a/src/config.go
+++ b/src/config.go
@@ -77,6 +77,10 @@ func NewConfig() *Config {
 					return err == nil && stat.IsDir()
 				}
 			default:
+				if strings.HasPrefix(arg, "--") {
+					fmt.Fprintln(os.Stderr, "Invalid command-line option " + arg)
+					os.Exit(1)
+				}
 				remainingArgs = append(remainingArgs, arg)
 			}
 		}
diff --git a/test.sh b/test.sh
index 98ddece..279fa13 100755
--- a/test.sh
+++ b/test.sh
@@ -164,12 +164,17 @@ function run() {
         echo -e "[::r]3.14[::-]\n[::r]70.1[::-]\n[::r]200[::-]" > test/EXPECT_$1
         diff test/RESULT_$1 test/EXPECT_$1
         ;;
+    32)
+        echo -e "foobar\n" | ./lisst --foobar 2> test/RESULT_$1
+        echo "Invalid command-line option --foobar" > test/EXPECT_$1
+        diff test/RESULT_$1 test/EXPECT_$1
+        ;;
     esac
 }
 
 if [ $# -eq 0 ]; then
     result=0
-    for i in {1..31}; do
+    for i in {1..32}; do
         echo "Test $i"
         run $i || { result=1; echo "   FAILED"; }
     done