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log.go
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log.go
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// Copyright 2021 The Codefresh 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
import (
"context"
"github.com/spf13/cobra"
)
var (
G = GetLogger
L Logger = NopLogger{}
)
type (
loggerKey struct{}
NopLogger struct{}
)
type Fields map[string]interface{}
type Logger interface {
Printf(string, ...interface{})
Debug(...interface{})
Info(...interface{})
Warn(...interface{})
Fatal(...interface{})
Error(...interface{})
Debugf(string, ...interface{})
Infof(string, ...interface{})
Warnf(string, ...interface{})
Fatalf(string, ...interface{})
Errorf(string, ...interface{})
WithField(string, interface{}) Logger
WithFields(Fields) Logger
WithError(error) Logger
// AddPFlags adds persistent logger flags to cmd
AddPFlags(*cobra.Command)
}
func WithLogger(ctx context.Context, logger Logger) context.Context {
if L == nil {
L = logger
}
return context.WithValue(ctx, loggerKey{}, logger)
}
func SetDefault(logger Logger) {
L = logger
}
func GetLogger(ctx ...context.Context) Logger {
if len(ctx) == 0 {
if L == nil {
panic("default logger not initialized")
}
return L
}
logger := ctx[0].Value(loggerKey{})
if logger == nil {
if L == nil {
panic("default logger not initialized")
}
return L
}
return logger.(Logger)
}
func (NopLogger) AddPFlags(*cobra.Command) {}
func (NopLogger) Printf(string, ...interface{}) {}
func (NopLogger) Debug(...interface{}) {}
func (NopLogger) Info(...interface{}) {}
func (NopLogger) Warn(...interface{}) {}
func (NopLogger) Fatal(...interface{}) {}
func (NopLogger) Error(...interface{}) {}
func (NopLogger) Debugf(string, ...interface{}) {}
func (NopLogger) Infof(string, ...interface{}) {}
func (NopLogger) Warnf(string, ...interface{}) {}
func (NopLogger) Fatalf(string, ...interface{}) {}
func (NopLogger) Errorf(string, ...interface{}) {}
func (l NopLogger) WithField(string, interface{}) Logger { return l }
func (l NopLogger) WithFields(Fields) Logger { return l }
func (l NopLogger) WithError(error) Logger { return l }