Add framework for remote liveness check

internal/remotes/remote/remote.go

@@ -13,12 +13,21 @@ type RemoteInfo struct {
 	Token string
 }
 
+type RemoteProto string
+
+const (
+	RemoteProtoSSH   RemoteProto = "ssh"
+	RemoteProtoHTTP  RemoteProto = "http"
+	RemoteProtoHTTPS RemoteProto = "https"
+)
+
 // Any remote needs to be able to return
 // the number of projects the user has access to and also
 // stream all projects along with updates to channels
 // provided by *load.ProgressInfo
 type Remote interface {
-	GetInfo() *RemoteInfo
+	GetInfo() *RemoteInfo                                // Returns basic RemoteInfo struct
-	GetNumProjects(*RemoteQueryOpts) int
+	IsAlive(RemoteProto) bool                            // Indicates if the remote is reachable by either SSH or HTTP
-	StreamProjects(*load.ProgressInfo, *RemoteQueryOpts)
+	GetNumProjects(*RemoteQueryOpts) int                 // Returns total number of accessible projects
+	StreamProjects(*load.ProgressInfo, *RemoteQueryOpts) // Streams projects to chans provided in load.ProgressInfo
 }

internal/remotes/remotes.go

@@ -21,6 +21,15 @@ func (r *Remotes) AddRemote(remote remote.Remote) {
 	*r = append(*r, remote)
 }
 
+func (r *Remotes) GetRemoteByHost(host string) remote.Remote {
+	for _, remote := range *r {
+		if remote.GetInfo().Host == host {
+			return remote
+		}
+	}
+	return nil
+}
+
 // Launches project streamsers for all remotes in goroutines
 // returns slice of load.ProgressInfo
 func (r *Remotes) StreamRemotes(opts *remote.RemoteQueryOpts) []*load.ProgressInfo {