bootstrap: check for presence of bootstrap nodes earlier

Rather than checking for the presence of bootstrap nodes on each iteration
of the deferred function, do the check at initialization time and report an
error immediately.

License: MIT
Signed-off-by: Daniel Mack <daniel@zonque.org>

core/bootstrap.go

@@ -77,6 +77,12 @@ func Bootstrap(n *IpfsNode, cfg BootstrapConfig) (io.Closer, error) {
 	// make a signal to wait for one bootstrap round to complete.
 	doneWithRound := make(chan struct{})
 
+	if len(cfg.BootstrapPeers()) == 0 {
+		// We *need* to bootstrap but we have no bootstrap peers
+		// configured *at all*, inform the user.
+		log.Error("no bootstrap nodes configured: go-ipfs may have difficulty connecting to the network")
+	}
+
 	// the periodic bootstrap function -- the connection supervisor
 	periodic := func(worker goprocess.Process) {
 		ctx := procctx.OnClosingContext(worker)
@@ -138,11 +144,6 @@ func bootstrapRound(ctx context.Context, host host.Host, cfg BootstrapConfig) er
 	// if connected to all bootstrap peer candidates, exit
 	if len(notConnected) < 1 {
 		log.Debugf("%s no more bootstrap peers to create %d connections", id, numToDial)
-		if len(peers) == 0 {
-			// We *need* to bootstrap but we have no bootstrap peers
-			// configured *at all*, inform the user.
-			log.Error("no bootstrap nodes configured: go-ipfs may have difficulty connecting to the network")
-		}
 		return ErrNotEnoughBootstrapPeers
 	}