9fans.net/go@v0.0.7/cmd/acme/internal/alog/alog.go (about)

     1  package alog
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  )
     7  
     8  var warn = func(msg string) {
     9  	fmt.Fprintf(os.Stderr, "acme: %s", msg) // msg has final newline
    10  }
    11  
    12  func Init(w func(string)) {
    13  	warn = w
    14  }
    15  
    16  func Printf(format string, args ...interface{}) {
    17  	s := fmt.Sprintf(format, args...)
    18  	if s != "" && s[len(s)-1] != '\n' {
    19  		s += "\n"
    20  	}
    21  	warn(s)
    22  }