Initial commit

vendor/sigs.k8s.io/controller-runtime/pkg/runtime/log/log.go

@@ -0,0 +1,85 @@
+/*
+Copyright 2018 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 log contains utilities for fetching a new logger
+// when one is not already available.
+package log
+
+import (
+	"io"
+	"os"
+	"time"
+
+	"github.com/go-logr/logr"
+	"github.com/go-logr/zapr"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+// ZapLogger is a Logger implementation.
+// If development is true, a Zap development config will be used
+// (stacktraces on warnings, no sampling), otherwise a Zap production
+// config will be used (stacktraces on errors, sampling).
+func ZapLogger(development bool) logr.Logger {
+	return ZapLoggerTo(os.Stderr, development)
+}
+
+// ZapLoggerTo returns a new Logger implementation using Zap which logs
+// to the given destination, instead of stderr.  It otherise behaves like
+// ZapLogger.
+func ZapLoggerTo(destWriter io.Writer, development bool) logr.Logger {
+	// this basically mimics New<type>Config, but with a custom sink
+	sink := zapcore.AddSync(destWriter)
+
+	var enc zapcore.Encoder
+	var lvl zap.AtomicLevel
+	var opts []zap.Option
+	if development {
+		encCfg := zap.NewDevelopmentEncoderConfig()
+		enc = zapcore.NewConsoleEncoder(encCfg)
+		lvl = zap.NewAtomicLevelAt(zap.DebugLevel)
+		opts = append(opts, zap.Development(), zap.AddStacktrace(zap.ErrorLevel))
+	} else {
+		encCfg := zap.NewProductionEncoderConfig()
+		enc = zapcore.NewJSONEncoder(encCfg)
+		lvl = zap.NewAtomicLevelAt(zap.InfoLevel)
+		opts = append(opts, zap.AddStacktrace(zap.WarnLevel),
+			zap.WrapCore(func(core zapcore.Core) zapcore.Core {
+				return zapcore.NewSampler(core, time.Second, 100, 100)
+			}))
+	}
+	opts = append(opts, zap.AddCallerSkip(1), zap.ErrorOutput(sink))
+	log := zap.New(zapcore.NewCore(&KubeAwareEncoder{Encoder: enc, Verbose: development}, sink, lvl))
+	log = log.WithOptions(opts...)
+	return zapr.NewLogger(log)
+}
+
+// SetLogger sets a concrete logging implementation for all deferred Loggers.
+func SetLogger(l logr.Logger) {
+	Log.Fulfill(l)
+}
+
+// Log is the base logger used by kubebuilder.  It delegates
+// to another logr.Logger.  You *must* call SetLogger to
+// get any actual logging.
+var Log = NewDelegatingLogger(NullLogger{})
+
+// KBLog is a base parent logger.
+var KBLog logr.Logger
+
+func init() {
+	KBLog = Log.WithName("kubebuilder")
+}