feat: Using logging module

configs/howmuch.yml

@@ -35,3 +35,14 @@ db:
   max-open-connections: 100
   # max connection life time
   max-connection-life-time: 10s
+
+log:
+  level: debug
+  development: true
+  disalbe-caller: false
+  disable-stacktrace: false
+  # console or json
+  format: console
+  output-paths:
+    - stdout
+    - /tmp/howmuch.log

internal/howmuch/helpers.go

@@ -23,11 +23,11 @@
 package howmuch
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
 
+	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/log"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -64,8 +64,20 @@ func initConfig() {
 	viper.SetEnvKeyReplacer(replacer)
 
 	if err := viper.ReadInConfig(); err != nil {
-		fmt.Fprintln(os.Stderr, err)
+		log.ErrorLog("Failed to read viper configuration file", "err", err)
 	}
 
-	fmt.Fprintln(os.Stdout, "Using config file:", viper.ConfigFileUsed())
+	log.InfoLog("Using config file", "file", viper.ConfigFileUsed())
+}
+
+// logOptions set log options from the configs read by viper.
+func logOptions() *log.Options {
+	return &log.Options{
+		Level:             viper.GetString("log.level"),
+		Development:       viper.GetBool("log.development"),
+		DisableCaller:     viper.GetBool("log.disable-caller"),
+		DisableStacktrace: viper.GetBool("log.disable-stacktrace"),
+		Format:            viper.GetString("log.format"),
+		OutputPaths:       viper.GetStringSlice("log.output-paths"),
+	}
 }

internal/howmuch/howmuch.go

@@ -27,6 +27,7 @@ import (
 	"fmt"
 	"net/http"
 
+	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/log"
 	"github.com/fsnotify/fsnotify"
 	"github.com/gin-gonic/gin"
 	"github.com/spf13/cobra"
@@ -47,6 +48,11 @@ func NewHowMuchCommand() *cobra.Command {
 		Long: `howmuch is a expense-sharing application that can help friends
 to share their expense of an event or a trip`,
 		RunE: func(cmd *cobra.Command, args []string) error {
+			// init log
+			log.Init(logOptions())
+			// Sync flush the buffer
+			defer log.Sync()
+
 			return run()
 		},
 		Args: func(cmd *cobra.Command, args []string) error {
@@ -76,18 +82,18 @@ to share their expense of an event or a trip`,
 }
 
 func run() error {
-	fmt.Println("How much do I owe you?")
+	log.DebugLog("How much do I owe you?")
 
 	settings, _ := json.MarshalIndent(viper.AllSettings(), "", "  ")
 
 	// watching reloading conf
 	viper.OnConfigChange(func(e fsnotify.Event) {
-		fmt.Println("Config file changed:", e.Name)
+		log.InfoLog("Config file changed:", e.Name)
 	})
 	viper.WatchConfig()
 
-	fmt.Println(string(settings))
+	log.InfoLog(string(settings))
-	fmt.Println(viper.GetString("db.username"))
+	log.InfoLog(viper.GetString("db.username"))
 
 	r := gin.Default()