refactor: urfave v3

vendor/github.com/urfave/cli/v3/flag_int_slice.go

@@ -0,0 +1,20 @@
+package cli
+
+type (
+	IntSlice     = SliceBase[int64, IntegerConfig, intValue]
+	IntSliceFlag = FlagBase[[]int64, IntegerConfig, IntSlice]
+)
+
+var NewIntSlice = NewSliceBase[int64, IntegerConfig, intValue]
+
+// IntSlice looks up the value of a local IntSliceFlag, returns
+// nil if not found
+func (cmd *Command) IntSlice(name string) []int64 {
+	if v, ok := cmd.Value(name).([]int64); ok {
+		tracef("int slice available for flag name %[1]q with value=%[2]v (cmd=%[3]q)", name, v, cmd.Name)
+		return v
+	}
+
+	tracef("int slice NOT available for flag name %[1]q (cmd=%[2]q)", name, cmd.Name)
+	return nil
+}