monitoring dashboard dependency vendor

Signed-off-by: junotx <junotx@126.com>

vendor/k8s.io/utils/strings/line_delimiter.go

@@ -0,0 +1,64 @@
+/*
+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 strings
+
+import (
+	"bytes"
+	"io"
+	"strings"
+)
+
+// LineDelimiter is a filter that will split input on lines
+// and bracket each line with the delimiter string.
+type LineDelimiter struct {
+	output    io.Writer
+	delimiter []byte
+	buf       bytes.Buffer
+}
+
+// NewLineDelimiter allocates a new io.Writer that will split input on lines
+// and bracket each line with the delimiter string.  This can be useful in
+// output tests where it is difficult to see and test trailing whitespace.
+func NewLineDelimiter(output io.Writer, delimiter string) *LineDelimiter {
+	return &LineDelimiter{output: output, delimiter: []byte(delimiter)}
+}
+
+// Write writes buf to the LineDelimiter ld. The only errors returned are ones
+// encountered while writing to the underlying output stream.
+func (ld *LineDelimiter) Write(buf []byte) (n int, err error) {
+	return ld.buf.Write(buf)
+}
+
+// Flush all lines up until now.  This will assume insert a linebreak at the current point of the stream.
+func (ld *LineDelimiter) Flush() (err error) {
+	lines := strings.Split(ld.buf.String(), "\n")
+	for _, line := range lines {
+		if _, err = ld.output.Write(ld.delimiter); err != nil {
+			return
+		}
+		if _, err = ld.output.Write([]byte(line)); err != nil {
+			return
+		}
+		if _, err = ld.output.Write(ld.delimiter); err != nil {
+			return
+		}
+		if _, err = ld.output.Write([]byte("\n")); err != nil {
+			return
+		}
+	}
+	return
+}