use log.Fatal instead panic on config errors

README.md

@@ -65,7 +65,7 @@ AUTH_LOGIN_TOKEN_EXPIRY | time.Duration | 11m | login token expiry
 AUTH_JWT_SECRET | string | random | jwt sign and verify key - value "random" creates random 32 char secret at startup (and automatically invalidates existing tokens on app restarts, so during dev you might want to set a fixed value here)
 AUTH_JWT_EXPIRY | time.Duration | 15m | jwt access token expiry
 AUTH_JWT_REFRESH_EXPIRY | time.Duration | 1h | jwt refresh token expiry
-EMAIL_SMTP_HOST | string || email smtp host (if set and connection can't be established then app panics)
+EMAIL_SMTP_HOST | string || email smtp host (if set and connection can't be established then app exits)
 EMAIL_SMTP_PORT | int || email smtp port
 EMAIL_SMTP_USER | string || email smtp username
 EMAIL_SMTP_PASSWORD | string || email smtp password

cmd/gendoc.go

@@ -17,6 +17,7 @@ package cmd
 import (
 	"fmt"
 	"io/ioutil"
+	"log"
 
 	"github.com/dhax/go-base/api"
 	"github.com/go-chi/docgen"
@@ -67,8 +68,8 @@ func genRoutesDoc() {
 		Intro:       "GoBase REST API.",
 	})
 	if err := ioutil.WriteFile("routes.md", []byte(md), 0644); err != nil {
-		fmt.Print(err)
+		log.Println(err)
 		return
 	}
-	fmt.Print("OK\n")
+	fmt.Println("OK")
 }

cmd/root.go

@@ -16,6 +16,7 @@ package cmd
 
 import (
 	"fmt"
+	"log"
 	"os"
 
 	homedir "github.com/mitchellh/go-homedir"
@@ -76,8 +77,7 @@ func initConfig() {
 		// Find home directory.
 		home, err := homedir.Dir()
 		if err != nil {
-			fmt.Println(err)
-			os.Exit(1)
+			log.Fatal(err)
 		}
 
 		// Search config in home directory with name ".go-base" (without extension).

cmd/serve.go

@@ -15,6 +15,8 @@
 package cmd
 
 import (
+	"log"
+
 	"github.com/dhax/go-base/api"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
@@ -28,7 +30,7 @@ var serveCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 		server, err := api.NewServer()
 		if err != nil {
-			panic(err)
+			log.Fatal(err)
 		}
 		server.Start()
 	},

database/migrate/main.go

@@ -1,8 +1,7 @@
 package migrate
 
 import (
-	"fmt"
-	"os"
+	"log"
 
 	"github.com/dhax/go-base/database"
 	"github.com/go-pg/migrations"
@@ -13,7 +12,7 @@ import (
 func Migrate(args []string) {
 	db, err := database.DBConn()
 	if err != nil {
-		panic(err)
+		log.Fatal(err)
 	}
 
 	err = db.RunInTransaction(func(tx *pg.Tx) error {
@@ -22,14 +21,14 @@ func Migrate(args []string) {
 			return err
 		}
 		if newVersion != oldVersion {
-			fmt.Printf("migrated from version %d to %d\n", oldVersion, newVersion)
+			log.Printf("migrated from version %d to %d\n", oldVersion, newVersion)
 		} else {
-			fmt.Printf("version is %d\n", oldVersion)
+			log.Printf("version is %d\n", oldVersion)
 		}
 		return nil
 	})
 	if err != nil {
-		exitf(err.Error())
+		log.Fatal(err)
 	}
 
 }
@@ -38,12 +37,12 @@ func Migrate(args []string) {
 func Reset() {
 	db, err := database.DBConn()
 	if err != nil {
-		exitf(err.Error())
+		log.Fatal(err)
 	}
 
 	version, err := migrations.Version(db)
 	if err != nil {
-		exitf(err.Error())
+		log.Fatal(err)
 	}
 
 	err = db.RunInTransaction(func(tx *pg.Tx) error {
@@ -52,21 +51,12 @@ func Reset() {
 			if err != nil {
 				return err
 			}
-			fmt.Printf("migrated from version %d to %d\n", oldVersion, newVersion)
+			log.Printf("migrated from version %d to %d\n", oldVersion, newVersion)
 			version = newVersion
 		}
 		return nil
 	})
 	if err != nil {
-		exitf(err.Error())
+		log.Fatal(err)
 	}
 }
-
-func errorf(s string, args ...interface{}) {
-	fmt.Fprintf(os.Stderr, s+"\n", args...)
-}
-
-func exitf(s string, args ...interface{}) {
-	errorf(s, args...)
-	os.Exit(1)
-}

database/postgres.go

@@ -1,7 +1,7 @@
 package database
 
 import (
-	"fmt"
+	"log"
 	"time"
 
 	"github.com/spf13/viper"
@@ -28,7 +28,7 @@ func DBConn() (*pg.DB, error) {
 			if err != nil {
 				panic(err)
 			}
-			fmt.Printf("%s %s\n", time.Since(event.StartTime), query)
+			log.Printf("%s %s\n", time.Since(event.StartTime), query)
 		})
 	}
 

logging/logger.go

@@ -2,6 +2,7 @@ package logging
 
 import (
 	"fmt"
+	"log"
 	"net/http"
 	"time"
 
@@ -39,7 +40,7 @@ func NewLogger() *logrus.Logger {
 	}
 	l, err := logrus.ParseLevel(level)
 	if err != nil {
-		panic(err)
+		log.Fatal(err)
 	}
 	Logger.Level = l
 	return Logger