Golang : How to check if your program is running in a terminal

Problem:

Your command line application accepts inputs from a terminal only or you just want to test if the application is really running under a terminal. How to check if the application is really running under a terminal?

Solution:

Use the github.com/mattn/go-isatty package to determine if your application running under Terminal, Windows Cygwin/MSYS2.

For example, running this code ( from github.com/mattn/go-isatty ) under a terminal

 package main

 import (
  "fmt"
  "github.com/mattn/go-isatty"
  "os"
 )

 func main() {
  if isatty.IsTerminal(os.Stdout.Fd()) {
 fmt.Println("Is Terminal")
  } else if isatty.IsCygwinTerminal(os.Stdout.Fd()) {
 fmt.Println("Is Cygwin/MSYS2 Terminal")
  } else {
 fmt.Println("Is Not Terminal")
  }
 }

will give:

Is Terminal

and if you execute the code under Gogland IDE, you will get Is Not Terminal:

GOROOT=/usr/local/go

GOPATH=/Users/admin/go

/usr/local/go/bin/go build -i -o /private/var/folders/mt/p1knsj5x45901p6t3q0kxpq40000gn/T/Buildmaingoandrungo

/Users/admin/GoglandProjects/ReallyTerminal/main.go

/private/var/folders/mt/p1knsj5x45901p6t3q0kxpq40000gn/T/Buildmaingoandrungo

Is Not Terminal

Process finished with exit code 0

Hope this helps!