test if data is coming in STDIN in Go

main.go

package main

import (
	"fmt"
	"os"

	"golang.org/x/term"
)

// https://go.dev/play/p/iuo-AZ1oRPk


func main() {
	fmt.Println("IsTerminal", term.IsTerminal(int(os.Stdin.Fd())))
	if isInputFromPipe() {
		fmt.Println("stdin has data")
	} else {
		fmt.Println("stdin doesn't have data")
	}

	fmt.Println("os.Args", os.Args)
}

func isInputFromPipe() bool {
	fi, _ := os.Stdin.Stat()
	return (fi.Mode() & os.ModeCharDevice) == 0
}