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clog.go
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clog.go
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package clog
import (
"context"
"fmt"
"io"
"os"
"runtime"
"strings"
"github.com/go-logr/logr"
"github.com/google/go-cmp/cmp"
apiruntime "k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/yaml"
)
const (
LEVEL_INFO = 0
LEVEL_DEBUG = 1
LEVEL_DEBUG_ALL = 2
)
func LogrIntoContext(ctx context.Context, logger logr.Logger) context.Context {
return log.IntoContext(ctx, logger)
}
func IntoContext(ctx context.Context, logger *Logger) context.Context {
return LogrIntoContext(ctx, logger.logger)
}
func FromContext(ctx context.Context) *Logger {
if ctx != nil {
logger := log.FromContext(ctx)
return NewLogger(logger)
}
return NewLogger(log.NullLogger{})
}
func NewLogger(log logr.Logger) *Logger {
return &Logger{logger: log, out: os.Stdout}
}
type Logger struct {
logger logr.Logger
out io.Writer
}
func (l *Logger) Enabled() bool {
return l.logger.Enabled()
}
func (l *Logger) WithName(name string) *Logger {
return NewLogger(l.logger.WithName(name))
}
func (l *Logger) WithValues(keysAndValues ...interface{}) *Logger {
return NewLogger(l.logger.WithValues(keysAndValues...))
}
func (l *Logger) WithCaller() *Logger {
return l.WithName(caller())
}
func (l *Logger) Debug() *Logger {
return NewLogger(l.logger.V(LEVEL_DEBUG))
}
func (l *Logger) DebugAll() *Logger {
return NewLogger(l.logger.V(LEVEL_DEBUG_ALL))
}
func (l *Logger) Error(err error, msg string, keysAndValues ...interface{}) {
if l.logger.Enabled() {
l.logger.Error(err, msg, keysAndValues...)
}
}
func (l *Logger) Info(msg string, keysAndValues ...interface{}) {
l.logger.Info(msg, keysAndValues...)
}
type NamedObject interface {
GetName() string
DeepCopyObject() apiruntime.Object
}
func (l *Logger) DumpObject(scheme *apiruntime.Scheme, obj NamedObject, msg string) {
if l.logger.Enabled() {
debugObj := obj.DeepCopyObject()
gvk, err := apiutil.GVKForObject(debugObj, scheme)
if err != nil {
return
}
apiVersion := gvk.GroupVersion()
kind := gvk.Kind
name := obj.GetName()
b, err := yaml.Marshal(obj)
if err == nil {
fmt.Fprintf(l.out, `--- dump object: %s
--- %s
--- APIVersion: %s, Kind: %s, Name: %s
%s
`, msg, fileLine(), apiVersion, kind, name, b)
}
}
}
func (l *Logger) PrintObjectDiff(x, y interface{}) {
if l.logger.Enabled() {
PrintObjectDiff(l.out, x, y)
}
}
func Diff(x, y interface{}) string {
return cmp.Diff(x, y)
}
func PrintObjectDiff(out io.Writer, x, y interface{}) {
diff := Diff(x, y)
fmt.Fprintln(out, diff)
}
func caller() string {
pc, _, _, ok := runtime.Caller(2)
if ok {
name := strings.Split(runtime.FuncForPC(pc).Name(), ".")
if len(name) == 0 {
return ""
}
return name[len(name)-1]
}
return ""
}
func fileLine() string {
_, file, line, ok := runtime.Caller(2)
if ok {
return fmt.Sprintf("%s:%d", file, line)
}
return ""
}