github.com/buildpacks/pack@v0.33.3-0.20240516162812-884dd1837311/pkg/logging/logger_simple.go (about)

     1  package logging
     2  
     3  import (
     4  	"fmt"
     5  	"io"
     6  	"log"
     7  )
     8  
     9  // NewSimpleLogger creates a simple logger for the pack library.
    10  func NewSimpleLogger(w io.Writer) Logger {
    11  	return &simpleLogger{
    12  		out: log.New(w, "", log.LstdFlags|log.Lmicroseconds),
    13  	}
    14  }
    15  
    16  type simpleLogger struct {
    17  	out *log.Logger
    18  }
    19  
    20  const (
    21  	debugPrefix = "DEBUG:"
    22  	infoPrefix  = "INFO:"
    23  	warnPrefix  = "WARN:"
    24  	errorPrefix = "ERROR:"
    25  	prefixFmt   = "%-7s %s"
    26  )
    27  
    28  func (l *simpleLogger) Debug(msg string) {
    29  	l.out.Printf(prefixFmt, debugPrefix, msg)
    30  }
    31  
    32  func (l *simpleLogger) Debugf(format string, v ...interface{}) {
    33  	l.out.Printf(prefixFmt, debugPrefix, fmt.Sprintf(format, v...))
    34  }
    35  
    36  func (l *simpleLogger) Info(msg string) {
    37  	l.out.Printf(prefixFmt, infoPrefix, msg)
    38  }
    39  
    40  func (l *simpleLogger) Infof(format string, v ...interface{}) {
    41  	l.out.Printf(prefixFmt, infoPrefix, fmt.Sprintf(format, v...))
    42  }
    43  
    44  func (l *simpleLogger) Warn(msg string) {
    45  	l.out.Printf(prefixFmt, warnPrefix, msg)
    46  }
    47  
    48  func (l *simpleLogger) Warnf(format string, v ...interface{}) {
    49  	l.out.Printf(prefixFmt, warnPrefix, fmt.Sprintf(format, v...))
    50  }
    51  
    52  func (l *simpleLogger) Error(msg string) {
    53  	l.out.Printf(prefixFmt, errorPrefix, msg)
    54  }
    55  
    56  func (l *simpleLogger) Errorf(format string, v ...interface{}) {
    57  	l.out.Printf(prefixFmt, errorPrefix, fmt.Sprintf(format, v...))
    58  }
    59  
    60  func (l *simpleLogger) Writer() io.Writer {
    61  	return l.out.Writer()
    62  }
    63  
    64  func (l *simpleLogger) IsVerbose() bool {
    65  	return false
    66  }