From f3d07b4ad2d83fcbc3fa3ceac7b7a41a82333681 Mon Sep 17 00:00:00 2001
From: Daniil Lashin <danil-lashin@yandex.ru>
Date: Thu, 15 Nov 2018 12:07:50 +0300
Subject: [PATCH] Add logs destination to config #133

---
 config/config.go |  3 +++
 config/toml.go   |  3 +++
 log/log.go       | 23 +++++++++++++++++++++--
 3 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/config/config.go b/config/config.go
index 26912798e..1f4f6e258 100644
--- a/config/config.go
+++ b/config/config.go
@@ -237,6 +237,8 @@ type BaseConfig struct {
 	APIPerIPLimit int `mapstructure:"api_per_ip_limit"`
 
 	APIPerIPLimitWindow time.Duration `mapstructure:"api_per_ip_limit_window"`
+
+	LogPath string `mapstructure:"log_path"`
 }
 
 // DefaultBaseConfig returns a default base configuration for a Tendermint node
@@ -261,6 +263,7 @@ func DefaultBaseConfig() BaseConfig {
 		APISimultaneousRequests: 100,
 		APIPerIPLimit:           1000,
 		APIPerIPLimitWindow:     60 * time.Second,
+		LogPath:                 "stdout",
 	}
 }
 
diff --git a/config/toml.go b/config/toml.go
index 219d3a574..cbcb68d9d 100644
--- a/config/toml.go
+++ b/config/toml.go
@@ -102,6 +102,9 @@ db_path = "{{ js .BaseConfig.DBPath }}"
 # Output level for logging, including package level options
 log_level = "{{ .BaseConfig.LogLevel }}"
 
+# Path to file for logs, "stdout" by default
+log_path = "{{ .BaseConfig.LogPath }}"
+
 ##### additional base config options #####
 
 # Path to the JSON file containing the private key to use as a validator in the consensus protocol
diff --git a/log/log.go b/log/log.go
index 8ee9ecb5d..35f2ebdc5 100644
--- a/log/log.go
+++ b/log/log.go
@@ -13,8 +13,27 @@ var (
 )
 
 func init() {
-	logger, _ := flags.ParseLogLevel(cfg.LogLevel, log.NewTMLogger(os.Stdout), "info")
-	SetLogger(logger)
+	var l log.Logger
+
+	if cfg.LogPath != "stdout" {
+		file, err := os.OpenFile(cfg.LogPath, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+
+		if err != nil {
+			panic(err)
+		}
+
+		l = log.NewTMLogger(file)
+	} else {
+		l = log.NewTMLogger(os.Stdout)
+	}
+
+	l, err := flags.ParseLogLevel(cfg.LogLevel, l, "info")
+
+	if err != nil {
+		panic(err)
+	}
+
+	SetLogger(l)
 }
 
 func SetLogger(l log.Logger) {