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debug: Dynamically pad tag in debug log

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This commit is contained in:
Alexander Neumann 2015-05-02 01:13:07 +02:00
parent 959da0a76a
commit 813031a989
1 changed files with 9 additions and 1 deletions
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10
debug/debug.go
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@ -9,6 +9,7 @@ import (
"path"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"syscall"
@ -145,6 +146,8 @@ func getPosition() string {
return fmt.Sprintf("%3d %s:%3d", goroutine, filepath.Base(file), line)
}
var maxTagLen = 10
func Log(tag string, f string, args ...interface{}) {
opts.m.Lock()
defer opts.m.Unlock()
@ -153,7 +156,12 @@ func Log(tag string, f string, args ...interface{}) {
f += "\n"
}
formatString := fmt.Sprintf("[% 25s] %-20s %s", tag, getPosition(), f)
if len(tag) > maxTagLen {
maxTagLen = len(tag)
}
formatStringTag := "[%" + strconv.FormatInt(int64(maxTagLen), 10) + "s]"
formatString := fmt.Sprintf(formatStringTag+" %s %s", tag, getPosition(), f)
dbgprint := func() {
fmt.Fprintf(os.Stderr, formatString, args...)