Handle error returned by xlsx.File.AddSheet.

main.go

@@ -1,19 +1,18 @@
 package main
 
-
 import (
 	"encoding/csv"
 	"flag"
 	"fmt"
 	"os"
+
 	"github.com/tealeg/xlsx"
 )
 
 var xlsxPath = flag.String("o", "", "Path to the XLSX output file")
 var csvPath = flag.String("f", "", "Path to the CSV input file")
 var delimiter = flag.String("d", ";", "Delimiter for felds in the CSV input.")
 
-
 func usage() {
 	fmt.Printf(`%s: -f=<CSV Input File> -o=<XLSX Output File> -d=<Delimiter>
 
@@ -34,7 +33,10 @@ func generateXLSXFromCSV(csvPath string, XLSXPath string, delimiter string) erro
 		reader.Comma = rune(';')
 	}
 	xlsxFile := xlsx.NewFile()
-	sheet := xlsxFile.AddSheet(csvPath)
+	sheet, err := xlsxFile.AddSheet(csvPath)
+	if err != nil {
+		return err
+	}
 	fields, err := reader.Read()
 	for err == nil {
 		row := sheet.AddRow()
@@ -50,7 +52,6 @@ func generateXLSXFromCSV(csvPath string, XLSXPath string, delimiter string) erro
 	return xlsxFile.Save(XLSXPath)
 }
 
-
 func main() {
 	flag.Parse()
 	if len(os.Args) < 3 {