Initial v1.0.0 commit

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

@@ -0,0 +1,131 @@
+/*
+Copyright 2020 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 zap contains helpers for setting up a new logr.Logger instance
+// using the Zap logging framework.
+package zap
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+var levelStrings = map[string]zapcore.Level{
+	"debug": zap.DebugLevel,
+	"info":  zap.InfoLevel,
+	"error": zap.ErrorLevel,
+}
+
+// TODO Add level to disable stacktraces.
+// https://github.com/kubernetes-sigs/controller-runtime/issues/1035
+var stackLevelStrings = map[string]zapcore.Level{
+	"info":  zap.InfoLevel,
+	"error": zap.ErrorLevel,
+}
+
+type encoderFlag struct {
+	setFunc func(NewEncoderFunc)
+	value   string
+}
+
+var _ flag.Value = &encoderFlag{}
+
+func (ev *encoderFlag) String() string {
+	return ev.value
+}
+
+func (ev *encoderFlag) Type() string {
+	return "encoder"
+}
+
+func (ev *encoderFlag) Set(flagValue string) error {
+	val := strings.ToLower(flagValue)
+	switch val {
+	case "json":
+		ev.setFunc(newJSONEncoder)
+	case "console":
+		ev.setFunc(newConsoleEncoder)
+	default:
+		return fmt.Errorf("invalid encoder value \"%s\"", flagValue)
+	}
+	ev.value = flagValue
+	return nil
+}
+
+type levelFlag struct {
+	setFunc func(zapcore.LevelEnabler)
+	value   string
+}
+
+var _ flag.Value = &levelFlag{}
+
+func (ev *levelFlag) Set(flagValue string) error {
+	level, validLevel := levelStrings[strings.ToLower(flagValue)]
+	if !validLevel {
+		logLevel, err := strconv.Atoi(flagValue)
+		if err != nil {
+			return fmt.Errorf("invalid log level \"%s\"", flagValue)
+		}
+		if logLevel > 0 {
+			intLevel := -1 * logLevel
+			ev.setFunc(zap.NewAtomicLevelAt(zapcore.Level(int8(intLevel))))
+		} else {
+			return fmt.Errorf("invalid log level \"%s\"", flagValue)
+		}
+	} else {
+		ev.setFunc(zap.NewAtomicLevelAt(level))
+	}
+	ev.value = flagValue
+	return nil
+}
+
+func (ev *levelFlag) String() string {
+	return ev.value
+}
+
+func (ev *levelFlag) Type() string {
+	return "level"
+}
+
+type stackTraceFlag struct {
+	setFunc func(zapcore.LevelEnabler)
+	value   string
+}
+
+var _ flag.Value = &stackTraceFlag{}
+
+func (ev *stackTraceFlag) Set(flagValue string) error {
+	level, validLevel := stackLevelStrings[strings.ToLower(flagValue)]
+	if !validLevel {
+		return fmt.Errorf("invalid stacktrace level \"%s\"", flagValue)
+	}
+	ev.setFunc(zap.NewAtomicLevelAt(level))
+	ev.value = flagValue
+	return nil
+}
+
+func (ev *stackTraceFlag) String() string {
+	return ev.value
+}
+
+func (ev *stackTraceFlag) Type() string {
+	return "level"
+}