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log.go
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log.go
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// Copyright 2022 Google LLC
//
// 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 (
"fmt"
"os"
"github.com/fatih/color"
)
var (
defaultLogger = New(false)
ePrintf = color.New(color.FgRed).FprintfFunc()
)
// a logger suitable for a CLI: no printing of timestamps, filenames, etc.
type Logger struct {
enableVerbose bool
}
func New(enableVerbose bool) *Logger {
return &Logger{
enableVerbose: enableVerbose,
}
}
func SetDefault(logger *Logger) {
defaultLogger = logger
}
func (l *Logger) Info(format string, args ...interface{}) {
fmt.Fprintf(os.Stdout, fmt.Sprintf("%s\n", format), args...)
}
func Info(format string, args ...interface{}) {
defaultLogger.Info(format, args...)
}
func (l *Logger) Verbose(format string, args ...interface{}) {
if l.enableVerbose {
l.Info(format, args...)
}
}
func Verbose(format string, args ...interface{}) {
defaultLogger.Verbose(format, args...)
}
func (l *Logger) Err(err error) {
l.Error("%v", err)
}
func Err(err error) {
defaultLogger.Err(err)
}
func (l *Logger) Error(format string, args ...interface{}) {
ePrintf(os.Stderr, fmt.Sprintf("%s\n", format), args...)
}
func Error(format string, args ...interface{}) {
defaultLogger.Error(format, args...)
}