update dependencies (#6267)

Signed-off-by: hongming <coder.scala@gmail.com>

vendor/k8s.io/gengo/v2/comments.go

@@ -0,0 +1,83 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package gengo
+
+import (
+	"fmt"
+	"strings"
+)
+
+// ExtractCommentTags parses comments for lines of the form:
+//
+//	'marker' + "key=value".
+//
+// Values are optional; "" is the default.  A tag can be specified more than
+// one time and all values are returned.  If the resulting map has an entry for
+// a key, the value (a slice) is guaranteed to have at least 1 element.
+//
+// Example: if you pass "+" for 'marker', and the following lines are in
+// the comments:
+//
+//	+foo=value1
+//	+bar
+//	+foo=value2
+//	+baz="qux"
+//
+// Then this function will return:
+//
+//	map[string][]string{"foo":{"value1, "value2"}, "bar": {""}, "baz": {"qux"}}
+func ExtractCommentTags(marker string, lines []string) map[string][]string {
+	out := map[string][]string{}
+	for _, line := range lines {
+		line = strings.Trim(line, " ")
+		if len(line) == 0 {
+			continue
+		}
+		if !strings.HasPrefix(line, marker) {
+			continue
+		}
+		// TODO: we could support multiple values per key if we split on spaces
+		kv := strings.SplitN(line[len(marker):], "=", 2)
+		if len(kv) == 2 {
+			out[kv[0]] = append(out[kv[0]], kv[1])
+		} else if len(kv) == 1 {
+			out[kv[0]] = append(out[kv[0]], "")
+		}
+	}
+	return out
+}
+
+// ExtractSingleBoolCommentTag parses comments for lines of the form:
+//
+//	'marker' + "key=value1"
+//
+// If the tag is not found, the default value is returned.  Values are asserted
+// to be boolean ("true" or "false"), and any other value will cause an error
+// to be returned.  If the key has multiple values, the first one will be used.
+func ExtractSingleBoolCommentTag(marker string, key string, defaultVal bool, lines []string) (bool, error) {
+	values := ExtractCommentTags(marker, lines)[key]
+	if values == nil {
+		return defaultVal, nil
+	}
+	if values[0] == "true" {
+		return true, nil
+	}
+	if values[0] == "false" {
+		return false, nil
+	}
+	return false, fmt.Errorf("tag value for %q is not boolean: %q", key, values[0])
+}