allow offline box

config.go

@@ -53,6 +53,7 @@ func (c *Config) Load() error {
 
 	for k, v := range c.Box {
 		v.Name = k
+		v.online = false
 		v.zfs = NewZFSConfig()
 		s := &SSHConfig{
 			logged: false,
@@ -97,31 +98,32 @@ func (c *Config) Load() error {
 				log.Printf("Config.Load : ssh.Dial(%s) : %s", k, err)
 			}
 			return err
-		}
-
-		session, err := s.client.NewSession()
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
+		} else {
+			v.online = true
+			session, err := s.client.NewSession()
+			if err != nil {
+				if *debugFlag {
+					log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
+				}
+				return err
 			}
-			return err
-		}
 
-		var b bytes.Buffer
-		session.Stdout = &b
+			var b bytes.Buffer
+			session.Stdout = &b
 
-		err = session.Run("TZ=\"" + cfg.Timezone + "\" zfsnap --version")
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
+			err = session.Run("TZ=\"" + cfg.Timezone + "\" zfsnap --version")
+			if err != nil {
+				if *debugFlag {
+					log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
+				}
+				return err
 			}
-			return err
+			if *debugFlag {
+				log.Printf("Config.Load : logged into %s : %s", k, b.String())
+			}
+			session.Close()
+			s.logged = true
 		}
-		if *debugFlag {
-			log.Printf("Config.Load : logged into %s : %s", k, b.String())
-		}
-		session.Close()
-		s.logged = true
 	}
 
 	for _, app := range c.Apps {
@@ -132,7 +134,11 @@ func (c *Config) Load() error {
 			if _, ok := cfg.Box[src.Box()]; !ok {
 				return fmt.Errorf("No box defined for source : %s", string(src))
 			}
+			if !cfg.Box[src.Box()].online {
+				return fmt.Errorf("Source box offline for app : %s", app.Name)
+			}
 		}
+		var allOffline bool = true
 		for _, dest := range app.Destinations {
 			if !dest.Valid() {
 				return fmt.Errorf("Destination not valid : %s", string(dest))
@@ -140,7 +146,14 @@ func (c *Config) Load() error {
 			if _, ok := cfg.Box[dest.Box()]; !ok {
 				return fmt.Errorf("No box defined for destination : %s", string(dest))
 			}
+			if cfg.Box[dest.Box()].online {
+				allOffline = false
+			}
 		}
+		if allOffline {
+			return fmt.Errorf("No online destination box for app : %s", app.Name)
+		}
+
 		for val, before := range app.Before {
 			_, err = regexp.Compile(val)
 			if err != nil {