vendor: update buildkit to v0.19.0-rc1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/k8s.io/klog/v2/OWNERS

@@ -1,14 +1,16 @@
 # See the OWNERS docs at https://go.k8s.io/owners
 reviewers:
   - harshanarayana
+  - mengjiao-liu
   - pohly
 approvers:
   - dims
+  - pohly
   - thockin
-  - serathius
 emeritus_approvers:
   - brancz
   - justinsb
   - lavalamp
   - piosz
+  - serathius
   - tallclair

vendor/k8s.io/klog/v2/contextual_slog.go

@@ -0,0 +1,31 @@
+//go:build go1.21
+// +build go1.21
+
+/*
+Copyright 2021 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 klog
+
+import (
+	"log/slog"
+
+	"github.com/go-logr/logr"
+)
+
+// SetSlogLogger reconfigures klog to log through the slog logger. The logger must not be nil.
+func SetSlogLogger(logger *slog.Logger) {
+	SetLoggerWithOptions(logr.FromSlogHandler(logger.Handler()), ContextualLogger(true))
+}

vendor/k8s.io/klog/v2/klog.go

@@ -14,9 +14,26 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Package klog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
-// It provides functions Info, Warning, Error, Fatal, plus formatting variants such as
-// Infof. It also provides V-style logging controlled by the -v and -vmodule=file=2 flags.
+// Package klog contains the following functionality:
+//
+//   - output routing as defined via command line flags ([InitFlags])
+//   - log formatting as text, either with a single, unstructured string ([Info], [Infof], etc.)
+//     or as a structured log entry with message and key/value pairs ([InfoS], etc.)
+//   - management of a go-logr [Logger] ([SetLogger], [Background], [TODO])
+//   - helper functions for logging values ([Format]) and managing the state of klog ([CaptureState], [State.Restore])
+//   - wrappers for [logr] APIs for contextual logging where the wrappers can
+//     be turned into no-ops ([EnableContextualLogging], [NewContext], [FromContext],
+//     [LoggerWithValues], [LoggerWithName]); if the ability to turn off
+//     contextual logging is not needed, then go-logr can also be used directly
+//   - type aliases for go-logr types to simplify imports in code which uses both (e.g. [Logger])
+//   - [k8s.io/klog/v2/textlogger]: a logger which uses the same formatting as klog log with
+//     simpler output routing; beware that it comes with its own command line flags
+//     and does not use the ones from klog
+//   - [k8s.io/klog/v2/ktesting]: per-test output in Go unit tests
+//   - [k8s.io/klog/v2/klogr]: a deprecated, standalone [logr.Logger] on top of the main klog package;
+//     use [Background] instead if klog output routing is needed, [k8s.io/klog/v2/textlogger] if not
+//   - [k8s.io/klog/v2/examples]: demos of this functionality
+//   - [k8s.io/klog/v2/test]: reusable tests for [logr.Logger] implementations
 //
 // Basic examples:
 //
@@ -387,13 +404,6 @@ func (t *traceLocation) Set(value string) error {
 	return nil
 }
 
-// flushSyncWriter is the interface satisfied by logging destinations.
-type flushSyncWriter interface {
-	Flush() error
-	Sync() error
-	io.Writer
-}
-
 var logging loggingT
 var commandLine flag.FlagSet
 
@@ -469,7 +479,7 @@ type settings struct {
 	// Access to all of the following fields must be protected via a mutex.
 
 	// file holds writer for each of the log types.
-	file [severity.NumSeverity]flushSyncWriter
+	file [severity.NumSeverity]io.Writer
 	// flushInterval is the interval for periodic flushing. If zero,
 	// the global default will be used.
 	flushInterval time.Duration
@@ -814,32 +824,12 @@ func (l *loggingT) printS(err error, s severity.Severity, depth int, msg string,
 	buffer.PutBuffer(b)
 }
 
-// redirectBuffer is used to set an alternate destination for the logs
-type redirectBuffer struct {
-	w io.Writer
-}
-
-func (rb *redirectBuffer) Sync() error {
-	return nil
-}
-
-func (rb *redirectBuffer) Flush() error {
-	return nil
-}
-
-func (rb *redirectBuffer) Write(bytes []byte) (n int, err error) {
-	return rb.w.Write(bytes)
-}
-
 // SetOutput sets the output destination for all severities
 func SetOutput(w io.Writer) {
 	logging.mu.Lock()
 	defer logging.mu.Unlock()
 	for s := severity.FatalLog; s >= severity.InfoLog; s-- {
-		rb := &redirectBuffer{
-			w: w,
-		}
-		logging.file[s] = rb
+		logging.file[s] = w
 	}
 }
 
@@ -851,10 +841,7 @@ func SetOutputBySeverity(name string, w io.Writer) {
 	if !ok {
 		panic(fmt.Sprintf("SetOutputBySeverity(%q): unrecognized severity name", name))
 	}
-	rb := &redirectBuffer{
-		w: w,
-	}
-	logging.file[sev] = rb
+	logging.file[sev] = w
 }
 
 // LogToStderr sets whether to log exclusively to stderr, bypassing outputs
@@ -994,7 +981,8 @@ func (l *loggingT) exit(err error) {
 		logExitFunc(err)
 		return
 	}
-	l.flushAll()
+	needToSync := l.flushAll()
+	l.syncAll(needToSync)
 	OsExit(2)
 }
 
@@ -1011,10 +999,6 @@ type syncBuffer struct {
 	maxbytes uint64 // The max number of bytes this syncBuffer.file can hold before cleaning up.
 }
 
-func (sb *syncBuffer) Sync() error {
-	return sb.file.Sync()
-}
-
 // CalculateMaxSize returns the real max size in bytes after considering the default max size and the flag options.
 func CalculateMaxSize() uint64 {
 	if logging.logFile != "" {
@@ -1206,24 +1190,45 @@ func StartFlushDaemon(interval time.Duration) {
 // lockAndFlushAll is like flushAll but locks l.mu first.
 func (l *loggingT) lockAndFlushAll() {
 	l.mu.Lock()
-	l.flushAll()
+	needToSync := l.flushAll()
 	l.mu.Unlock()
+	// Some environments are slow when syncing and holding the lock might cause contention.
+	l.syncAll(needToSync)
 }
 
-// flushAll flushes all the logs and attempts to "sync" their data to disk.
+// flushAll flushes all the logs
 // l.mu is held.
-func (l *loggingT) flushAll() {
+//
+// The result is the number of files which need to be synced and the pointers to them.
+func (l *loggingT) flushAll() fileArray {
+	var needToSync fileArray
+
 	// Flush from fatal down, in case there's trouble flushing.
 	for s := severity.FatalLog; s >= severity.InfoLog; s-- {
 		file := l.file[s]
-		if file != nil {
-			_ = file.Flush() // ignore error
-			_ = file.Sync()  // ignore error
+		if sb, ok := file.(*syncBuffer); ok && sb.file != nil {
+			_ = sb.Flush() // ignore error
+			needToSync.files[needToSync.num] = sb.file
+			needToSync.num++
 		}
 	}
 	if logging.loggerOptions.flush != nil {
 		logging.loggerOptions.flush()
 	}
+	return needToSync
+}
+
+type fileArray struct {
+	num   int
+	files [severity.NumSeverity]*os.File
+}
+
+// syncAll attempts to "sync" their data to disk.
+func (l *loggingT) syncAll(needToSync fileArray) {
+	// Flush from fatal down, in case there's trouble flushing.
+	for i := 0; i < needToSync.num; i++ {
+		_ = needToSync.files[i].Sync() // ignore error
+	}
 }
 
 // CopyStandardLogTo arranges for messages written to the Go "log" package's

vendor/k8s.io/klog/v2/klogr_slog.go

@@ -25,7 +25,7 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/go-logr/logr/slogr"
+	"github.com/go-logr/logr"
 
 	"k8s.io/klog/v2/internal/buffer"
 	"k8s.io/klog/v2/internal/serialize"
@@ -35,7 +35,7 @@ import (
 
 func (l *klogger) Handle(ctx context.Context, record slog.Record) error {
 	if logging.logger != nil {
-		if slogSink, ok := logging.logger.GetSink().(slogr.SlogSink); ok {
+		if slogSink, ok := logging.logger.GetSink().(logr.SlogSink); ok {
 			// Let that logger do the work.
 			return slogSink.Handle(ctx, record)
 		}
@@ -77,13 +77,13 @@ func slogOutput(file string, line int, now time.Time, err error, s severity.Seve
 	buffer.PutBuffer(b)
 }
 
-func (l *klogger) WithAttrs(attrs []slog.Attr) slogr.SlogSink {
+func (l *klogger) WithAttrs(attrs []slog.Attr) logr.SlogSink {
 	clone := *l
 	clone.values = serialize.WithValues(l.values, sloghandler.Attrs2KVList(l.groups, attrs))
 	return &clone
 }
 
-func (l *klogger) WithGroup(name string) slogr.SlogSink {
+func (l *klogger) WithGroup(name string) logr.SlogSink {
 	clone := *l
 	if clone.groups != "" {
 		clone.groups += "." + name
@@ -93,4 +93,4 @@ func (l *klogger) WithGroup(name string) slogr.SlogSink {
 	return &clone
 }
 
-var _ slogr.SlogSink = &klogger{}
+var _ logr.SlogSink = &klogger{}

vendor/k8s.io/klog/v2/safeptr.go

@@ -0,0 +1,34 @@
+//go:build go1.18
+// +build go1.18
+
+/*
+Copyright 2023 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 klog
+
+// SafePtr is a function that takes a pointer of any type (T) as an argument.
+// If the provided pointer is not nil, it returns the same pointer. If it is nil, it returns nil instead.
+//
+// This function is particularly useful to prevent nil pointer dereferencing when:
+//
+//   - The type implements interfaces that are called by the logger, such as `fmt.Stringer`.
+//   - And these interface implementations do not perform nil checks themselves.
+func SafePtr[T any](p *T) any {
+	if p == nil {
+		return nil
+	}
+	return p
+}