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log.go
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log.go
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package main
import (
"fmt"
"io"
"os"
"runtime"
"strings"
"time"
"github.com/xhd2015/xgo/support/osinfo"
)
var logDebugFile *os.File
func setupDebugLog(logDebugOption *string) (func(), error) {
var logDebugFileName string
if logDebugOption != nil {
logDebugFileName = *logDebugOption
if logDebugFileName == "" {
// default to stderr
logDebugFileName = "stderr"
}
}
if logDebugFileName == "" {
return nil, nil
}
return initLog(logDebugFileName)
}
func initLog(logDebugFileName string) (func(), error) {
if logDebugFileName == "stdout" {
logDebugFile = os.Stdout
return nil, nil
}
if logDebugFileName == "stderr" {
logDebugFile = os.Stderr
return nil, nil
}
var err error
logDebugFile, err = os.Create(logDebugFileName)
if err != nil {
return nil, fmt.Errorf("create log: %s %w", logDebugFileName, err)
}
return func() {
logDebugFile.Close()
}, nil
}
func logDebug(format string, args ...interface{}) {
if logDebugFile == nil {
return
}
fmt.Fprint(logDebugFile, time.Now().Format("2006-01-02 15:04:05"), " ")
fmt.Fprintf(logDebugFile, format, args...)
if !strings.HasSuffix(format, "\n") {
fmt.Fprintln(logDebugFile)
}
logDebugFile.Sync()
}
func logStartup() {
logDebug("start: %v", os.Args)
logDebug("runtime.GOOS=%s", runtime.GOOS)
logDebug("runtime.GOARCH=%s", runtime.GOARCH)
logDebug("runtime.Version()=%s", runtime.Version())
logDebug("runtime.GOROOT()=%s", runtime.GOROOT())
logDebug("os exe suffix: %s", osinfo.EXE_SUFFIX)
logDebug("os force copy unsym: %v", osinfo.FORCE_COPY_UNSYM)
}
// if [[ $verbose = true ]];then
//
// tail -fn1 "$shdir/compile.log" &
// trap "kill -9 $!" EXIT
// fi
func tailLog(logFile string) {
file, err := os.OpenFile(logFile, os.O_RDONLY|os.O_CREATE, 0755)
if err != nil {
fmt.Fprintf(os.Stderr, "open compile log: %v\n", err)
return
}
_, err = file.Seek(0, io.SeekEnd)
if err != nil {
fmt.Fprintf(os.Stderr, "seek tail compile log: %v\n", err)
return
}
buf := make([]byte, 1024)
for {
n, err := file.Read(buf)
if n > 0 {
os.Stdout.Write(buf[:n])
}
if err != nil {
if err == io.EOF {
time.Sleep(50 * time.Millisecond)
continue
}
fmt.Fprintf(os.Stderr, "tail compile log: %v\n", err)
return
}
}
}