github.com/tooolbox/migrate/v4@v4.6.2-0.20200325001913-461b03b92064/internal/cli/log.go (about)

     1  package cli
     2  
     3  import (
     4  	"fmt"
     5  	logpkg "log"
     6  	"os"
     7  )
     8  
     9  // Log represents the logger
    10  type Log struct {
    11  	verbose bool
    12  }
    13  
    14  // Printf prints out formatted string into a log
    15  func (l *Log) Printf(format string, v ...interface{}) {
    16  	if l.verbose {
    17  		logpkg.Printf(format, v...)
    18  	} else {
    19  		fmt.Fprintf(os.Stderr, format, v...)
    20  	}
    21  }
    22  
    23  // Println prints out args into a log
    24  func (l *Log) Println(args ...interface{}) {
    25  	if l.verbose {
    26  		logpkg.Println(args...)
    27  	} else {
    28  		fmt.Fprintln(os.Stderr, args...)
    29  	}
    30  }
    31  
    32  // Verbose shows if verbose print enabled
    33  func (l *Log) Verbose() bool {
    34  	return l.verbose
    35  }
    36  
    37  func (l *Log) fatal(args ...interface{}) {
    38  	l.Println(args...)
    39  	os.Exit(1)
    40  }
    41  
    42  func (l *Log) fatalErr(err error) {
    43  	l.fatal("error:", err)
    44  }