feat(server): cmd flag to disable colored logs (backport #18478)

CHANGELOG.md

@@ -37,6 +37,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+### Improvements
+
+* (server) [#18478](https://github.com/cosmos/cosmos-sdk/pull/18478) Add command flag to disable colored logs.
+
 ### Bug Fixes
 
 * (client/tx) [#18472](https://github.com/cosmos/cosmos-sdk/pull/18472) Utilizes the correct Pubkey when simulating a transaction.

client/flags/flags.go

@@ -85,8 +85,9 @@ const (
 	FlagOutput = tmcli.OutputFlag
 
 	// Tendermint logging flags
-	FlagLogLevel  = "log_level"
-	FlagLogFormat = "log_format"
+	FlagLogLevel   = "log_level"
+	FlagLogFormat  = "log_format"
+	FlagLogNoColor = "log_no_color"
 )
 
 // LineBreak can be included in a command list to provide a blank line

server/cmd/execute.go

@@ -27,6 +27,7 @@ func Execute(rootCmd *cobra.Command, envPrefix string, defaultHome string) error
 
 	rootCmd.PersistentFlags().String(flags.FlagLogLevel, tmcfg.DefaultLogLevel, "The logging level (trace|debug|info|warn|error|fatal|panic)")
 	rootCmd.PersistentFlags().String(flags.FlagLogFormat, tmcfg.LogFormatPlain, "The logging format (json|plain)")
+	rootCmd.PersistentFlags().Bool(flags.FlagLogNoColor, false, "Disable colored logs")
 
 	executor := tmcli.PrepareBaseCmd(rootCmd, envPrefix, defaultHome)
 	return executor.ExecuteContext(ctx)

server/util.go

@@ -160,6 +160,11 @@ func InterceptConfigsPreRunHandler(cmd *cobra.Command, customAppConfigTemplate s
 		opts = append(opts, log.OutputJSONOption())
 	}
 
+	opts = append(opts,
+		log.ColorOption(!serverCtx.Viper.GetBool(flags.FlagLogNoColor)),
+		// We use CometBFT flag (cmtcli.TraceFlag) for trace logging.
+		log.TraceOption(serverCtx.Viper.GetBool(FlagTrace)))
+
 	// check and set filter level or keys for the logger if any
 	logLvlStr := serverCtx.Viper.GetString(flags.FlagLogLevel)
 	if logLvlStr != "" {
@@ -178,9 +183,6 @@ func InterceptConfigsPreRunHandler(cmd *cobra.Command, customAppConfigTemplate s
 		}
 	}
 
-	// Check if the CometBFT flag for trace logging is set and enable stack traces if so.
-	opts = append(opts, log.TraceOption(serverCtx.Viper.GetBool("trace"))) // cmtcli.TraceFlag
-
 	logger := log.NewLogger(tmlog.NewSyncWriter(os.Stdout), opts...).With(log.ModuleKey, "server")
 	serverCtx.Logger = serverlog.CometLoggerWrapper{Logger: logger}