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