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logger.go
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logger.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package logger
import (
"github.com/go-logr/logr"
"github.com/go-logr/zapr"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
var (
Log logr.Logger
configFromFlags = Config{}
)
var encoderConfig = zapcore.EncoderConfig{
TimeKey: "ts",
LevelKey: "level",
NameKey: "logger",
CallerKey: "caller",
MessageKey: "msg",
StacktraceKey: "stacktrace",
LineEnding: zapcore.DefaultLineEnding,
EncodeLevel: zapcore.LowercaseLevelEncoder,
EncodeTime: zapcore.ISO8601TimeEncoder,
EncodeDuration: zapcore.SecondsDurationEncoder,
EncodeCaller: zapcore.ShortCallerEncoder,
}
var cliEncoderConfig = zapcore.EncoderConfig{
TimeKey: "",
LevelKey: "level",
NameKey: "logger",
CallerKey: "caller",
MessageKey: "msg",
StacktraceKey: "stacktrace",
LineEnding: zapcore.DefaultLineEnding,
EncodeLevel: zapcore.LowercaseColorLevelEncoder,
EncodeTime: zapcore.ISO8601TimeEncoder,
EncodeDuration: zapcore.SecondsDurationEncoder,
EncodeCaller: zapcore.ShortCallerEncoder,
}
var defaultConfig = zap.Config{
Level: zap.NewAtomicLevelAt(zap.InfoLevel),
Development: true,
Encoding: "console",
DisableStacktrace: false,
DisableCaller: false,
EncoderConfig: encoderConfig,
OutputPaths: []string{"stderr"},
ErrorOutputPaths: []string{"stderr"},
}
var cliConfig = zap.Config{
Level: zap.NewAtomicLevelAt(zap.InfoLevel),
Development: false,
Encoding: "console",
DisableStacktrace: false,
DisableCaller: true,
EncoderConfig: cliEncoderConfig,
OutputPaths: []string{"stderr"},
ErrorOutputPaths: []string{"stderr"},
}
var productionConfig = zap.Config{
Level: zap.NewAtomicLevelAt(zap.InfoLevel),
Development: false,
DisableStacktrace: true,
DisableCaller: true,
Encoding: "json",
EncoderConfig: encoderConfig,
OutputPaths: []string{"stderr"},
ErrorOutputPaths: []string{"stderr"},
}
func New(config *Config) (logr.Logger, error) {
if config == nil {
config = &configFromFlags
}
zapCfg := determineZapConfig(config)
level := int8(0 - config.Verbosity)
zapCfg.Level = zap.NewAtomicLevelAt(zapcore.Level(level))
zapLog, err := zapCfg.Build(zap.AddCallerSkip(1))
if err != nil {
return logr.Logger{}, err
}
return zapr.NewLogger(zapLog), nil
}
func SetLogger(log logr.Logger) {
Log = log
}
// NewCliLogger creates a new logger for cli usage.
// CLI usage means that by default:
// - the default dev config
// - encoding is console
// - timestamps are disabled (can be still activated by the cli flag)
// - level are color encoded
func NewCliLogger() (logr.Logger, error) {
config := &configFromFlags
config.Cli = true
return New(config)
}
func determineZapConfig(loggerConfig *Config) zap.Config {
var zapConfig zap.Config
if loggerConfig.Development {
zapConfig = defaultConfig
} else if loggerConfig.Cli {
zapConfig = cliConfig
if loggerConfig.Development {
zapConfig.Development = true
loggerConfig.DisableCaller = false
}
} else {
zapConfig = productionConfig
}
loggerConfig.SetDisableCaller(&zapConfig)
loggerConfig.SetDisableStacktrace(&zapConfig)
loggerConfig.SetTimestamp(&zapConfig)
return zapConfig
}