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// Copyright 2022 wanderer <wanderer at>
// SPDX-License-Identifier: GPL-3.0-or-later
package main
import (
var csvreader *csv.Reader
// readFile tries to open the file passed in func argument and returns a
// *csvreader if the file could be open.
func readFile(fname string) csv.Reader {
f, err := os.Open(fname)
if err != nil {
log.Fatalf("error reading file %s, bailing...\n", fname)
csvreader = csv.NewReader(f)
return *csvreader
// readArg returns a *csvreader that reads from the passed arg.
func readArg(arg string) csv.Reader {
if arg == "" {
log.Fatalf("the arg is empty, bailing...\n")
return *csv.NewReader(strings.NewReader(arg))