show version

main.go

@@ -10,6 +10,8 @@ import (
 	"strconv"
 	"strings"
 	"unicode/utf8"
+
+	"git.milar.in/milarin/buildinfo"
 )
 
 var (
@@ -45,6 +47,8 @@ var (
 	// it may be useful to have a boolean flag for this behavior
 	lineParseAmount = flag.Int("n", 1, "amount of lines to feed into input pattern")
 
+	showVersion = flag.Bool("v", false, "show version and exit")
+
 	replacePattern     = regexp.MustCompile(`\{(\d+)(?::(.*?))?(?::(.*?))?(?::(.*?))?\}`)
 	numMutationPattern = regexp.MustCompile(`([+\-*/])(\d+|\((\d+)\))`)
 )
@@ -52,6 +56,11 @@ var (
 func main() {
 	flag.Parse()
 
+	if *showVersion {
+		buildinfo.Print(buildinfo.Options{})
+		return
+	}
+
 	pattern, err := regexp.Compile(*input)
 	if err != nil {
 		panic(err)