Add daemon func

Author: mattolenik

cmd/root.go

@@ -29,6 +29,9 @@ For example:
 ` + "DOMAIN=mydomain.com RECORD=sub.mydomain.com TOKEN=<api-token> cloudflare-ddns" + `
 `,
 	RunE: func(cmd *cobra.Command, args []string) error {
+		if viper.GetBool(conf.Daemon) {
+			return errors.Trace(ddns.DaemonWithDefaults(context.Background()))
+		}
 		return errors.Trace(ddns.Run(context.Background()))
 	},
 	Version: conf.Version,
@@ -41,6 +44,7 @@ func init() {
 	Root.PersistentFlags().String(conf.Token, "", "CloudFlare API token with permissions Zone:Zone:Read and Zone:DNS:Edit")
 	Root.PersistentFlags().Bool(conf.JSONOutput, false, "Log format, either pretty or json, defaults to pretty")
 	Root.PersistentFlags().BoolP(conf.Verbose, conf.VerboseShort, false, "Verbose logging, prints additional log output")
+	Root.PersistentFlags().Bool(conf.Daemon, false, "Run as a service, continually monitoring for DNS changes")
 	Root.SetVersionTemplate("{{.Version}}\n")
 
 	viper.BindPFlag(conf.Config, Root.PersistentFlags().Lookup(conf.Config))

conf/conf.go

@@ -9,6 +9,8 @@ var ModuleName string
 var (
 	// Config is the path to the config file, if present
 	Config = "config"
+	// Daemon is the flag for enabling daemon mode
+	Daemon = "daemon"
 	// Domain is the domain to update within CloudFlare
 	Domain = "domain"
 	// Record is the DNS record to update within CloudFlare, may be same as Domain or a subdomain

ddns/ddns.go

@@ -56,7 +56,7 @@ func Daemon(ctx context.Context, updatePeriod, failureRetryDelay time.Duration)
 			log.Info().Msgf(
 				"No IP change detected since %s (%d seconds ago)",
 				lastIPUpdate.Format(time.RFC1123Z),
-				int(time.Now().Sub(lastIPUpdate).Seconds()))
+				int(time.Since(lastIPUpdate).Seconds()))
 			time.Sleep(updatePeriod)
 			continue
 		}

ddns/ddns_test.go

@@ -0,0 +1 @@
+package ddns

go.mod

@@ -3,25 +3,18 @@ module github.com/mattolenik/cloudflare-ddns-client
 go 1.16
 
 require (
-	github.com/cloudflare/cloudflare-go v0.16.0
-	github.com/juju/errors v0.0.0-20200330140219-3fe23663418f
+	github.com/cloudflare/cloudflare-go v0.24.0
+	github.com/juju/errors v0.0.0-20210818161939-5560c4c073ff
 	github.com/juju/testing v0.0.0-20201030020617-7189b3728523 // indirect
 	github.com/lixiangzhong/dnsutil v1.4.0
-	github.com/magiconair/properties v1.8.5 // indirect
-	github.com/miekg/dns v1.1.42 // indirect
-	github.com/mitchellh/mapstructure v1.4.1 // indirect
-	github.com/pelletier/go-toml v1.9.0 // indirect
-	github.com/rs/zerolog v1.21.0
-	github.com/spf13/afero v1.6.0 // indirect
-	github.com/spf13/cast v1.3.1 // indirect
-	github.com/spf13/cobra v1.1.3
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/viper v1.7.1
+	github.com/miekg/dns v1.1.43 // indirect
+	github.com/rs/zerolog v1.25.0
+	github.com/spf13/cobra v1.2.1
+	github.com/spf13/viper v1.9.0
 	github.com/stretchr/testify v1.7.0
-	golang.org/x/crypto v0.0.0-20210506145944-38f3c27a63bf // indirect
-	golang.org/x/net v0.0.0-20210508051633-16afe75a6701 // indirect
-	golang.org/x/sys v0.0.0-20210507161434-a76c4d0a0096 // indirect
-	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba // indirect
-	gopkg.in/ini.v1 v1.62.0 // indirect
+	golang.org/x/net v0.0.0-20211005215030-d2e5035098b3 // indirect
+	golang.org/x/sys v0.0.0-20211004093028-2c5d950f24ef // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac // indirect
 	gotest.tools/gotestsum v0.6.0
 )