Golang: simplest way to execute several deferred funcs and return appropriate exit code from main

main.go

package main

import (
  "some/logging"
  "also/database"
  "finally/application"
  "fmt"
  "os"
)
func main() {
  // prepare exit code, first
  exitCode := 0
  defer func(){ os.Exit(exitCode) }()
  
  // make your initialization
  logger, err := logging.NewFileLog("filename")
  if err != nil {
    fmt.Println(err)
    exitCode = 1
    return
  }
  defer logger.Close()
  
  db, err := database.Open() // in real app your will need some arguments for open
  if err = nil {
    logger.Errorf("Can't open database: %v", err)
    exitCode = 1
    return
  }
  defer db.Close()
  
  // start your app
  app, err := application.New(db, logger)
  if err != nil {
    logger.Errorf("Can't start application: %v", err)
    exitCode = 1
    return
  }
  logger.Info("Started...")
  if err = app.Run(); err != nil {
    logger.Errorf("Stopped with error: %v", err)
    exitCode = 2
    return
  }
  logger.Info("Done")
}