go mod & remove add command

go.mod

@@ -0,0 +1,5 @@
+module github.com/dalu/spamip
+
+go 1.13
+
+require github.com/urfave/cli v1.22.1

go.sum

@@ -0,0 +1,12 @@
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY=
+github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

main.go

@@ -15,12 +15,12 @@ const (
 	zoneFilePath = "/var/bind/pri/localhost.zone"
 )
 
-var re = regexp.MustCompile(`^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$`)
+var re = regexp.MustCompile(`^([0-9]{1,3}|\*)\.([0-9]{1,3}|\*)\.([0-9]{1,3}|\*)\.([0-9]{1,3}|\*)$`)
 
 func main() {
 	app := cli.NewApp()
 	app.Name = "spamip"
-	app.Version = "0.1"
+	app.Version = "0.2"
 	app.Compiled = time.Now()
 	app.Authors = []cli.Author{
 		{
@@ -42,24 +42,18 @@ func main() {
 		},
 	}
 
-	app.Commands = []cli.Command{
-		{
-			Name:    "add",
-			Aliases: []string{"a"},
-			Usage:   "add an IP address to the zone file",
-			Action: func(c *cli.Context) error {
-				if len(c.Args()) != 1 {
-					return errors.New("add takes exactly 1 argument, an IPv4 address")
-				}
-				if !re.MatchString(c.Args().First()) {
-					return errors.New(c.Args().First() + "is not an IPv4 address")
-				}
-				s := re.FindStringSubmatch(c.Args().First())
-				text := fmt.Sprintf("%s.%s.%s.%s\tIN\tA\t127.0.0.3\n", s[4], s[3], s[2], s[1])
-				return appendText(text, c.GlobalString("file"))
-			},
-		},
+	app.Action = func(c *cli.Context) error {
+		if len(c.Args()) != 1 {
+			return errors.New("add takes exactly 1 argument, an IPv4 address")
+		}
+		if !re.MatchString(c.Args().First()) {
+			return errors.New(c.Args().First() + "is not an IPv4 address")
+		}
+		s := re.FindStringSubmatch(c.Args().First())
+		text := fmt.Sprintf("%s.%s.%s.%s\tIN\tA\t127.0.0.3\n", s[4], s[3], s[2], s[1])
+		return appendText(text, c.GlobalString("file"))
 	}
+
 	err := app.Run(os.Args)
 	if err != nil {
 		log.Fatal(err)