refactor: urfave v3

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

@@ -0,0 +1,56 @@
+package cli
+
+// MutuallyExclusiveFlags defines a mutually exclusive flag group
+// Multiple option paths can be provided out of which
+// only one can be defined on cmdline
+// So for example
+// [ --foo | [ --bar something --darth somethingelse ] ]
+type MutuallyExclusiveFlags struct {
+	// Flag list
+	Flags [][]Flag
+
+	// whether this group is required
+	Required bool
+
+	// Category to apply to all flags within group
+	Category string
+}
+
+func (grp MutuallyExclusiveFlags) check(cmd *Command) error {
+	oneSet := false
+	e := &mutuallyExclusiveGroup{}
+
+	for _, grpf := range grp.Flags {
+		for _, f := range grpf {
+			for _, name := range f.Names() {
+				if cmd.IsSet(name) {
+					if oneSet {
+						e.flag2Name = name
+						return e
+					}
+					e.flag1Name = name
+					oneSet = true
+					break
+				}
+			}
+			if oneSet {
+				break
+			}
+		}
+	}
+
+	if !oneSet && grp.Required {
+		return &mutuallyExclusiveGroupRequiredFlag{flags: &grp}
+	}
+	return nil
+}
+
+func (grp MutuallyExclusiveFlags) propagateCategory() {
+	for _, grpf := range grp.Flags {
+		for _, f := range grpf {
+			if cf, ok := f.(CategorizableFlag); ok {
+				cf.SetCategory(grp.Category)
+			}
+		}
+	}
+}