minor update README

README.md

@@ -2,19 +2,26 @@ CLI tool to manage cloudflare DNS records
 
 ## Installation
 
-### Using go
+### Using [go](https://go.dev)
 ```bash
-❯ go install go.balki.me/cloudflare-dns-cli@latest
+go install go.balki.me/cloudflare-dns-cli@latest
+
+# Run directly without installing
+go run go.balki.me/cloudflare-dns-cli@latest -h
+
 ```
-### Using docker
+### Using [docker](https://www.docker.com)
 ```bash
-❯ mkdir -p $HOME/bin
-❯ docker run --pull=always --rm -v "$HOME/bin:/op" golang sh -c "go install go.balki.me/cloudflare-dns-cli@latest && install -o $(id -u) -g $(id -g) /go/bin/cloudflare-dns-cli /op/"
+mkdir -p $HOME/bin
+docker run --pull=always --rm -v "$HOME/bin:/op" golang sh -c "go install go.balki.me/cloudflare-dns-cli@latest && install -o $(id -u) -g $(id -g) /go/bin/cloudflare-dns-cli /op/"
+
+# Run directly without installing
+docker run --pull=always --rm golang go run go.balki.me/cloudflare-dns-cli@latest -h
 ```
 
 ## Features
 
-1. Add/Modify `A`, `AAAA`, `CNAME` records
+1. Add/Modify `A`, `AAAA`, `CNAME`, `MX` records
 2. List/Delete records
 3. Save all records in JSON format
 
@@ -30,6 +37,7 @@ Usage of cloudflare-dns-cli:
         Domain name, e.g. example.com. env var: DOMAIN
   -i value
         IP address (default 127.0.0.1)
+  -m    Set mx record with cname value
   -o string
         Path to save all records as json, e.g. ./records.json
   -s string

go.mod

@@ -1,6 +1,6 @@
 module go.balki.me/cloudflare-dns-cli
 
-go 1.20
+go 1.21
 
 require (
 	github.com/libdns/cloudflare v0.1.0

main.go

@@ -23,6 +23,7 @@ var (
 	sub    = "<UNSET>"
 	path   string
 	del    = false
+	mx     = false
 )
 
 func genRecord() (libdns.Record, error) {
@@ -30,11 +31,19 @@ func genRecord() (libdns.Record, error) {
 	ipv6 := ip.To16()
 	switch {
 	case cname != "":
+		if mx {
+			return libdns.Record{
+				Type:  "MX",
+				Name:  sub,
+				Value: cname,
+			}, nil
+		} else {
 			return libdns.Record{
 				Type:  "CNAME",
 				Name:  sub,
 				Value: cname,
 			}, nil
+		}
 	case ipv4 != nil:
 		return libdns.Record{
 			Type:  "A",
@@ -101,8 +110,19 @@ func main() {
 	flag.StringVar(&cname, "c", cname, "CNAME target")
 	flag.StringVar(&path, "o", path, "Path to save all records as json, e.g. ./records.json")
 	flag.BoolVar(&del, "x", del, "Delete records of subdomain")
+	flag.BoolVar(&mx, "m", mx, "Set mx record with cname value")
 	flag.Parse()
 
+	if token == "" {
+		flag.Usage()
+		log.Panicln("empty cloudflare api token")
+	}
+
+	if domain == "" {
+		flag.Usage()
+		log.Panicln("empty domain name")
+	}
+
 	provider := cloudflare.Provider{APIToken: token}
 	zone := domain + "."