fix skip-exists flag

Signed-off-by: Justin Kolberg <amd.prophet@gmail.com>

Author: amdprophet

util/util.go

@@ -1,8 +1,10 @@
 package util
 
+import "strings"
+
 func SliceContainsString(s []string, e string) bool {
 	for _, a := range s {
-		if a == e {
+		if strings.Contains(a, e) {
 			return true
 		}
 	}

util/util_test.go

@@ -0,0 +1,11 @@
+package util
+
+import "testing"
+
+func TestSliceContainsString(t *testing.T) {
+	slice := []string{"'my-package_0.1.0_amd64.deb' has already been taken"}
+	result := SliceContainsString(slice, "has already been taken")
+	if !result {
+		t.Error("slice did not contain string")
+	}
+}