package main

import (
  "fmt"
  "os"
  "os/exec"
  "github.com/mattn/go-isatty"
  "flag"
  "log"
  "io"
)

func main() {
  flag.Parse()
  prog := flag.Args()[0]

  // ignore SIGHUP

  if isatty.IsTerminal(os.Stdout.Fd()) {
    fmt.Println("Is Terminal")
  } else if isatty.IsCygwinTerminal(os.Stdout.Fd()) {
    fmt.Println("Is cygwin/msys2 terminal")
  } else {
    cmd := exec.Command(prog)
    if cmd.Err != nil { log.Fatal(cmd.Err) }

    in, err := cmd.StdinPipe()
    if err != nil { log.Fatal(err) }
    in.Close()

    stdout, err := cmd.StdoutPipe()
    if err != nil { log.Fatal(err) }

    stderr, err := cmd.StderrPipe()
    if err != nil { log.Fatal(err) }

    output := io.MultiReader(stdout, stderr)

    err = cmd.Start()
    if err != nil { log.Fatal(err) }

    _, err = io.Copy(os.Stdout, output)
    if err != nil { log.Fatal(err) }
  }
}