until stable: pin-dependency, update-vendor, update-bazel, lint-dep

vendor/github.com/xlab/treeprint/helpers.go

@@ -0,0 +1,47 @@
+package treeprint
+
+import (
+	"reflect"
+	"strings"
+)
+
+func isEmpty(v *reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	}
+	return false
+}
+
+func tagSpec(tag string) (name string, omit bool) {
+	parts := strings.Split(tag, ",")
+	if len(parts) < 2 {
+		return tag, false
+	}
+	if parts[1] == "omitempty" {
+		return parts[0], true
+	}
+	return parts[0], false
+}
+
+func filterTags(tag reflect.StructTag) string {
+	tags := strings.Split(string(tag), " ")
+	filtered := make([]string, 0, len(tags))
+	for i := range tags {
+		if strings.HasPrefix(tags[i], "tree:") {
+			continue
+		}
+		filtered = append(filtered, tags[i])
+	}
+	return strings.Join(filtered, " ")
+}