feat: Allow paths starting with slash

kyaml/utils/pathsplitter.go

@@ -11,6 +11,13 @@ import "strings"
 func PathSplitter(path string, delimiter string) []string {
 	ps := strings.Split(path, delimiter)
 	var res []string
+
+	// allow path to start with forward slash
+	// i.e. /a/b/c
+	if len(ps) > 1 && ps[0] == "" {
+		ps = ps[1:]
+	}
+
 	res = append(res, ps[0])
 	for i := 1; i < len(ps); i++ {
 		last := len(res) - 1

kyaml/utils/pathsplitter_test.go

@@ -27,6 +27,10 @@ func TestPathSplitter(t *testing.T) {
 			path: "a/b/c",
 			exp:  []string{"a", "b", "c"},
 		},
+		{
+			path: "/a/b/c",
+			exp:  []string{"a", "b", "c"},
+		},
 		{
 			path: `a/b[]/c`,
 			exp:  []string{"a", "b[]", "c"},