Your init is closing the file before returning, so at that point all the
writes are failing. If you check the error you receive from logger.Print
you should see something to that effect.
Thomas
On Mon, Feb 5, 2018 at 1:39 PM <mbri...@gmail.com> wrote:
> I'm initializing a Logger variable in an init() function and then
> attempting to use in the main() function. However, I'm able to Printf from
> the Logger in the init() function but not inside the main() function. Any
> help would be appreciated.
>
> package main
>
> import (
>
> "fmt"
> "log"
> "io"
>
> "os"
>
> }
>
> var (
>
> logFile *os.File
> logger *log.Logger
> multiWriter io.Writer
>
> )
>
> func init() {
>
> fmt.Println("init() function")
>
> var logFileError error
> logFile, logFileError = os.Create("gopoc.log")
> if logFileError != nil {
> panic(logFileError)
> }
> defer logFile.Close()
>
> fmt.Println("Creating log file")
>
> multiWriter = io.MultiWriter(logFile, os.Stdout)
>
> logger = log.New(multiWriter, gopocLogPrefix, log.Ldate | log.Ltime |
> log.Lshortfile)
> logger.SetOutput(multiWriter)
>
> fmt.Println("Created logger")
>
> logger.Printf("Using logger") // prints to console and logFile as expected
>
> }
>
> func main() {
>
> fmt.Println("main() function ") // prints to console
>
> fmt.Println(logger) // I can see the object pointer
>
> logger.Print("hello") // This does not print to logFile nor
> os.Stdout !!!
>
> }
>
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