1 package main
2
3 import (
4 "flag"
5 "fmt"
6 "github.com/gobwas/glob"
7 "github.com/gobwas/glob/match"
8 "github.com/gobwas/glob/match/debug"
9 "os"
10 "strings"
11 "unicode/utf8"
12 )
13
14 func main() {
15 pattern := flag.String("p", "", "pattern to draw")
16 sep := flag.String("s", "", "comma separated list of separators characters")
17 flag.Parse()
18
19 if *pattern == "" {
20 flag.Usage()
21 os.Exit(1)
22 }
23
24 var separators []rune
25 if len(*sep) > 0 {
26 for _, c := range strings.Split(*sep, ",") {
27 if r, w := utf8.DecodeRuneInString(c); len(c) > w {
28 fmt.Println("only single charactered separators are allowed")
29 os.Exit(1)
30 } else {
31 separators = append(separators, r)
32 }
33 }
34 }
35
36 glob, err := glob.Compile(*pattern, separators...)
37 if err != nil {
38 fmt.Println("could not compile pattern:", err)
39 os.Exit(1)
40 }
41
42 matcher := glob.(match.Matcher)
43 fmt.Fprint(os.Stdout, debug.Graphviz(*pattern, matcher))
44 }
45
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