go fmt

addr.go

@@ -1,11 +1,11 @@
 package main
 
 import (
-	"net"
-	"github.com/vishvananda/netlink"
 	"fmt"
-	"log"
+	"github.com/vishvananda/netlink"
 	"io"
+	"log"
+	"net"
 )
 
 type AddrSet struct {
@@ -21,7 +21,7 @@ func (addrs *AddrSet) String() string {
 }
 
 func (addrs *AddrSet) testFlag(flag net.Flags) bool {
-	return addrs.linkAttrs.Flags & flag != 0
+	return addrs.linkAttrs.Flags&flag != 0
 }
 
 func (addrs *AddrSet) Up() bool {

dns.go

@@ -1,18 +1,19 @@
 package main
 
 import (
-	"github.com/miekg/dns"
 	"fmt"
-	"time"
+	"github.com/miekg/dns"
 	"log"
 	"net"
+	"time"
 )
 
 const TSIG_FUDGE_SECONDS = 300
+
 type TSIGAlgorithm string
 
 func (t *TSIGAlgorithm) UnmarshalFlag(value string) error {
-	switch (value) {
+	switch value {
 	case "hmac-md5", "md5":
 		*t = dns.HmacMD5
 	case "hmac-sha1", "sha1":

main.go

@@ -11,16 +11,17 @@ type Options struct {
 	Verbose bool `long:"verbose" short:"v"`
 	Watch   bool `long:"watch" description:"Watch for interface changes"`
 
+	// Netlink Interface
 	Interface       string `long:"interface" short:"i" value-name:"IFACE" description:"Use address from interface"`
 	InterfaceFamily Family `long:"interface-family" value-name:"ipv4|ipv6|all" description:"Limit to interface addreses of given family"`
 
+	// DNS Update
 	Server        string        `long:"server" value-name:"HOST[:PORT]" description:"Server for UPDATE query, default is discovered from zone SOA"`
 	Timeout       time.Duration `long:"timeout" value-name:"DURATION" default:"10s" description:"Timeout for sever queries"`
 	Retry         time.Duration `long:"retry" value-name:"DURATION" default:"30s" description:"Retry interval, increased for each retry attempt"`
 	TSIGName      string        `long:"tsig-name" value-name:"FQDN"`
 	TSIGSecret    string        `long:"tsig-secret" value-name:"BASE-64" env:"TSIG_SECRET" description:"base64-encoded shared TSIG secret key"`
 	TSIGAlgorithm TSIGAlgorithm `long:"tsig-algorithm" value-name:"hmac-{md5,sha1,sha256,sha512}" default:"hmac-sha1."`
-
 	Zone          string        `long:"zone" value-name:"FQDN" description:"Zone to update, default is derived from name"`
 	TTL           time.Duration `long:"ttl" value-name:"DURATION" default:"60s" description:"TTL for updated records"`
 

netlink.go

@@ -1,15 +1,15 @@
 package main
 
 import (
-	"github.com/vishvananda/netlink"
 	"fmt"
+	"github.com/vishvananda/netlink"
 )
 
 // zero value is unspec=all
 type Family int
 
 func (f *Family) UnmarshalFlag(value string) error {
-	switch (value) {
+	switch value {
 	case "unspec", "all":
 		*f = netlink.FAMILY_ALL
 	case "inet", "ipv4":
@@ -22,5 +22,3 @@ func (f *Family) UnmarshalFlag(value string) error {
 
 	return nil
 }
-
-

update.go

@@ -1,11 +1,11 @@
 package main
 
 import (
-	"github.com/miekg/dns"
-	"time"
 	"fmt"
-	"net"
+	"github.com/miekg/dns"
 	"log"
+	"net"
+	"time"
 )
 
 type updateState struct {
@@ -93,10 +93,10 @@ func (u *Update) buildAddr(ip net.IP) dns.RR {
 func (u *Update) buildState(addrs *AddrSet) (state updateState, err error) {
 	state.updateZone = u.zone
 	state.removeNames = []dns.RR{
-		&dns.RR_Header{Name:u.name},
+		&dns.RR_Header{Name: u.name},
 	}
 
-	addrs.Each(func(ip net.IP){
+	addrs.Each(func(ip net.IP) {
 		state.inserts = append(state.inserts, u.buildAddr(ip))
 	})
 
@@ -173,7 +173,7 @@ func (u *Update) run() {
 	var updateChan = u.updateChan
 	var updateError error
 
-	defer func(){u.doneChan <-updateError}()
+	defer func() { u.doneChan <- updateError }()
 
 	for {
 		select {