build: apply log type flags in NewDefaultLogHandlers

So that the logging config "Disable" options and log type flags are all
handled in one place. Other repo's can then re-use this nicely.

build/handlers.go

@@ -9,8 +9,10 @@ import (
 // NewDefaultLogHandlers returns the standard console logger and rotating log
 // writer handlers that we generally want to use. It also applies the various
 // config options to the loggers.
-func NewDefaultLogHandlers(cfg *LogConfig, rotator *RotatingLogWriter) (
-	btclog.Handler, btclog.Handler) {
+func NewDefaultLogHandlers(cfg *LogConfig,
+	rotator *RotatingLogWriter) []btclog.Handler {
+
+	var handlers []btclog.Handler
 
 	consoleLogHandler := btclog.NewDefaultHandler(
 		os.Stdout, cfg.Console.HandlerOptions()...,
@@ -19,5 +21,18 @@ func NewDefaultLogHandlers(cfg *LogConfig, rotator *RotatingLogWriter) (
 		rotator, cfg.File.HandlerOptions()...,
 	)
 
-	return consoleLogHandler, logFileHandler
+	maybeAddLogger := func(cmdOptionDisable bool, handler btclog.Handler) {
+		if !cmdOptionDisable {
+			handlers = append(handlers, handler)
+		}
+	}
+	switch LoggingType {
+	case LogTypeStdOut:
+		maybeAddLogger(cfg.Console.Disable, consoleLogHandler)
+	case LogTypeDefault:
+		maybeAddLogger(cfg.Console.Disable, consoleLogHandler)
+		maybeAddLogger(cfg.File.Disable, logFileHandler)
+	}
+
+	return handlers
 }

config.go

@@ -21,7 +21,6 @@ import (
 
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/chaincfg"
-	"github.com/btcsuite/btclog/v2"
 	flags "github.com/jessevdk/go-flags"
 	"github.com/lightninglabs/neutrino"
 	"github.com/lightningnetwork/lnd/autopilot"
@@ -1404,32 +1403,14 @@ func ValidateConfig(cfg Config, interceptor signal.Interceptor, fileParser,
 		lncfg.NormalizeNetwork(cfg.ActiveNetParams.Name),
 	)
 
-	var (
-		logCfg                            = cfg.LogConfig
-		logHandlers                       []btclog.Handler
-		consoleLogHandler, logFileHandler = build.NewDefaultLogHandlers(
-			logCfg, cfg.LogRotator,
-		)
-	)
-	maybeAddLogger := func(cmdOptionDisable bool, handler btclog.Handler) {
-		if !cmdOptionDisable {
-			logHandlers = append(logHandlers, handler)
-		}
-	}
-	switch build.LoggingType {
-	case build.LogTypeStdOut:
-		maybeAddLogger(logCfg.Console.Disable, consoleLogHandler)
-	case build.LogTypeDefault:
-		maybeAddLogger(logCfg.Console.Disable, consoleLogHandler)
-		maybeAddLogger(logCfg.File.Disable, logFileHandler)
-	}
-
 	if !build.SuportedLogCompressor(cfg.LogCompressor) {
 		return nil, mkErr("invalid log compressor: %v",
 			cfg.LogCompressor)
 	}
 
-	cfg.SubLogMgr = build.NewSubLoggerManager(logHandlers...)
+	cfg.SubLogMgr = build.NewSubLoggerManager(build.NewDefaultLogHandlers(
+		cfg.LogConfig, cfg.LogRotator,
+	)...)
 
 	// Initialize logging at the default logging level.
 	SetupLoggers(cfg.SubLogMgr, interceptor)