package main

import (
	"fmt"
	"io"
	"os"
)

func read(file string) ([]byte, error) {

	if file == "-" {
		data, err := io.ReadAll(os.Stdin)
		if err != nil {
			return nil, fmt.Errorf("Error reading from stdin")
		}
		return data, nil
	}
	data, err := os.ReadFile(file)
	if err != nil {
		return nil, fmt.Errorf("Error reading from '%s'", file)
	}
	return data, nil
}