rebase: update kubernetes to 1.30

updating kubernetes to 1.30 release

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/component-base/logs/api/v1/text.go

@@ -0,0 +1,142 @@
+/*
+Copyright 2022 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 v1
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"sync"
+
+	"github.com/go-logr/logr"
+
+	"k8s.io/component-base/featuregate"
+	"k8s.io/klog/v2/textlogger"
+)
+
+// textFactory produces klog text logger instances.
+type textFactory struct{}
+
+var _ LogFormatFactory = textFactory{}
+
+func (f textFactory) Feature() featuregate.Feature {
+	return LoggingStableOptions
+}
+
+func (f textFactory) Create(c LoggingConfiguration, o LoggingOptions) (logr.Logger, RuntimeControl) {
+	output := o.ErrorStream
+	var flush func()
+	if c.Options.Text.SplitStream {
+		r := &klogMsgRouter{
+			info:  o.InfoStream,
+			error: o.ErrorStream,
+		}
+		size := c.Options.Text.InfoBufferSize.Value()
+		if size > 0 {
+			// Prevent integer overflow.
+			if size > 2*1024*1024*1024 {
+				size = 2 * 1024 * 1024 * 1024
+			}
+			info := newBufferedWriter(r.info, int(size))
+			flush = info.Flush
+			r.info = info
+		}
+		output = r
+	}
+
+	options := []textlogger.ConfigOption{
+		textlogger.Verbosity(int(c.Verbosity)),
+		textlogger.Output(output),
+	}
+	loggerConfig := textlogger.NewConfig(options...)
+
+	// This should never fail, we produce a valid string here.
+	_ = loggerConfig.VModule().Set(VModuleConfigurationPflag(&c.VModule).String())
+
+	return textlogger.NewLogger(loggerConfig),
+		RuntimeControl{
+			SetVerbosityLevel: func(v uint32) error {
+				return loggerConfig.Verbosity().Set(fmt.Sprintf("%d", v))
+			},
+			Flush: flush,
+		}
+}
+
+type klogMsgRouter struct {
+	info, error io.Writer
+}
+
+var _ io.Writer = &klogMsgRouter{}
+
+// Write redirects the message into either the info or error
+// stream, depending on its type as indicated in text format
+// by the first byte.
+func (r *klogMsgRouter) Write(p []byte) (int, error) {
+	if len(p) == 0 {
+		return 0, nil
+	}
+
+	if p[0] == 'I' {
+		return r.info.Write(p)
+	}
+	return r.error.Write(p)
+}
+
+// bufferedWriter is an io.Writer that buffers writes in-memory before
+// flushing them to a wrapped io.Writer after reaching some limit
+// or getting flushed.
+type bufferedWriter struct {
+	mu     sync.Mutex
+	writer *bufio.Writer
+	out    io.Writer
+}
+
+func newBufferedWriter(out io.Writer, size int) *bufferedWriter {
+	return &bufferedWriter{
+		writer: bufio.NewWriterSize(out, size),
+		out:    out,
+	}
+}
+
+func (b *bufferedWriter) Write(p []byte) (int, error) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+
+	// To avoid partial writes into the underlying writer, we ensure that
+	// the entire new data fits into the buffer or flush first.
+	if len(p) > b.writer.Available() && b.writer.Buffered() > 0 {
+		if err := b.writer.Flush(); err != nil {
+			return 0, err
+		}
+	}
+
+	// If it still doesn't fit, then we bypass the now empty buffer
+	// and write directly.
+	if len(p) > b.writer.Available() {
+		return b.out.Write(p)
+	}
+
+	// This goes into the buffer.
+	return b.writer.Write(p)
+}
+
+func (b *bufferedWriter) Flush() {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+
+	_ = b.writer.Flush()
+}