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comparison wdown.go @ 5:534fa4c6668e

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Add command line argument parsing
author Jonatan Werpers <jonatan@werpers.com>
date Tue, 16 Jun 2020 21:23:38 +0200
parents 0b747e2d51c9
children a5f397e25cb7
comparison
equal deleted inserted replaced
4:0b747e2d51c9 5:534fa4c6668e
1 package main 1 package main
2 2
3 import ( 3 import (
4 "flag"
5 "fmt"
4 "io/ioutil" 6 "io/ioutil"
5 "log" 7 "log"
6 "os" 8 "os"
7 9
8 "github.com/yuin/goldmark" 10 "github.com/yuin/goldmark"
10 "github.com/yuin/goldmark/extension" 12 "github.com/yuin/goldmark/extension"
11 "github.com/yuin/goldmark/parser" 13 "github.com/yuin/goldmark/parser"
12 ) 14 )
13 15
14 func main() { 16 func main() {
15 source, err := ioutil.ReadFile(os.Args[1]) 17 flag.Parse()
18
19 if flag.NArg() < 1 {
20 fmt.Println("Please provide a markdown file for parsing.")
21 os.Exit(1)
22 }
23
24 source, err := ioutil.ReadFile(flag.Arg(0))
16 25
17 if err != nil { 26 if err != nil {
18 log.Fatal(err) 27 log.Fatal(err)
19 } 28 }
20 29