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package main
import (
"flag"
"fmt"
"github.com/gobwas/glob"
"github.com/gobwas/glob/match"
"github.com/gobwas/glob/match/debug"
"os"
"strings"
"unicode/utf8"
)
func main() {
pattern := flag.String("p", "", "pattern to draw")
sep := flag.String("s", "", "comma separated list of separators characters")
flag.Parse()
if *pattern == "" {
flag.Usage()
os.Exit(1)
}
var separators []rune
if len(*sep) > 0 {
for _, c := range strings.Split(*sep, ",") {
if r, w := utf8.DecodeRuneInString(c); len(c) > w {
fmt.Println("only single charactered separators are allowed")
os.Exit(1)
} else {
separators = append(separators, r)
}
}
}
glob, err := glob.Compile(*pattern, separators...)
if err != nil {
fmt.Println("could not compile pattern:", err)
os.Exit(1)
}
matcher := glob.(match.Matcher)
fmt.Fprint(os.Stdout, debug.Graphviz(*pattern, matcher))
}
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