config: forward fx output to the logger

config/config.go

@@ -28,14 +28,12 @@ import (
 	relayv2 "github.com/libp2p/go-libp2p/p2p/protocol/circuitv2/relay"
 	"github.com/libp2p/go-libp2p/p2p/protocol/holepunch"
 
-	logging "github.com/ipfs/go-log/v2"
 	ma "github.com/multiformats/go-multiaddr"
 	madns "github.com/multiformats/go-multiaddr-dns"
 	"go.uber.org/fx"
+	"go.uber.org/fx/fxevent"
 )
 
-var log = logging.Logger("p2p-config")
-
 // AddrsFactory is a function that takes a set of multiaddrs we're listening on and
 // returns the set of multiaddrs we should advertise to the network.
 type AddrsFactory = bhost.AddrsFactory
@@ -187,7 +185,7 @@ func (cfg *Config) addTransports(h host.Host) error {
 	}
 
 	fxopts := []fx.Option{
-		fx.NopLogger,
+		fx.WithLogger(func() fxevent.Logger { return getFXLogger() }),
 		fx.Provide(tptu.New),
 		fx.Provide(func() network.Multiplexer { return muxer }),
 		fx.Provide(fx.Annotate(

config/log.go

@@ -0,0 +1,28 @@
+package config
+
+import (
+	"strings"
+	"sync"
+
+	logging "github.com/ipfs/go-log/v2"
+	"go.uber.org/fx/fxevent"
+)
+
+var log = logging.Logger("p2p-config")
+
+var (
+	fxLogger    fxevent.Logger
+	logInitOnce sync.Once
+)
+
+type fxLogWriter struct{}
+
+func (l *fxLogWriter) Write(b []byte) (int, error) {
+	log.Debug(strings.TrimSuffix(string(b), "\n"))
+	return len(b), nil
+}
+
+func getFXLogger() fxevent.Logger {
+	logInitOnce.Do(func() { fxLogger = &fxevent.ConsoleLogger{W: &fxLogWriter{}} })
+	return fxLogger
+}