create default config if it does not already exist (#39)

build/sysroot/usr/lib/systemd/system/casaos-gateway.service

@@ -1,6 +1,5 @@
 [Unit]
 After=network.target
-ConditionFileNotEmpty=/etc/casaos/gateway.ini
 Description=CasaOS Gateway
 
 [Service]

cmd/migration-tool/main.go

@@ -12,8 +12,6 @@ import (
 )
 
 const (
-	gatewayConfigDirPath    = "/etc/casaos"
-	gatewayConfigFilePath   = "/etc/casaos/gateway.ini"
 	gatewayServiceName      = "casaos-gateway.service"
 	gatewayServiceNameShort = "gateway"
 )

common/config.go

@@ -6,6 +6,8 @@ import (
 	"path/filepath"
 
 	"github.com/spf13/viper"
+
+	"github.com/IceWhaleTech/CasaOS-Common/utils/constants"
 )
 
 const (
@@ -15,20 +17,23 @@ const (
 	ConfigKeyGatewayPort = "gateway.Port"
 	ConfigKeyWWWPath     = "gateway.WWWPath"
 	ConfigKeyRuntimePath = "common.RuntimePath"
+
+	GatewayName       = "gateway"
+	GatewayConfigType = "ini"
 )
 
 func LoadConfig() (*viper.Viper, error) {
 	config := viper.New()
 
-	config.SetDefault(ConfigKeyLogPath, "/var/log/casaos")
-	config.SetDefault(ConfigKeyLogSaveName, "gateway")
+	config.SetDefault(ConfigKeyLogPath, constants.DefaultLogPath)
+	config.SetDefault(ConfigKeyLogSaveName, GatewayName)
 	config.SetDefault(ConfigKeyLogFileExt, "log")
 
-	config.SetDefault(ConfigKeyWWWPath, "/var/lib/casaos/www")
-	config.SetDefault(ConfigKeyRuntimePath, "/var/run/casaos") // See https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch05s13.html
+	config.SetDefault(ConfigKeyWWWPath, filepath.Join(constants.DefaultDataPath, "www"))
+	config.SetDefault(ConfigKeyRuntimePath, constants.DefaultRuntimePath) // See https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch05s13.html
 
-	config.SetConfigName("gateway")
-	config.SetConfigType("ini")
+	config.SetConfigName(GatewayName)
+	config.SetConfigType(GatewayConfigType)
 
 	if currentDirectory, err := os.Getwd(); err != nil {
 		log.Println(err)
@@ -41,7 +46,7 @@ func LoadConfig() (*viper.Viper, error) {
 		config.AddConfigPath(configPath)
 	}
 
-	config.AddConfigPath(filepath.Join("/", "etc", "casaos"))
+	config.AddConfigPath(constants.DefaultConfigPath)
 
 	if err := config.ReadInConfig(); err != nil {
 		return nil, err

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	_ "embed"
 	"errors"
 	"flag"
 	"fmt"
@@ -15,6 +16,7 @@ import (
 
 	"github.com/IceWhaleTech/CasaOS-Common/external"
 	"github.com/IceWhaleTech/CasaOS-Common/model"
+	"github.com/IceWhaleTech/CasaOS-Common/utils/constants"
 	http2 "github.com/IceWhaleTech/CasaOS-Common/utils/http"
 	"github.com/IceWhaleTech/CasaOS-Common/utils/logger"
 	"github.com/coreos/go-systemd/daemon"
@@ -39,6 +41,9 @@ var (
 	_gatewayServiceReady    = make(chan struct{})
 
 	ErrCheckURLNotOK = errors.New("check url did not return 200 OK")
+
+	//go:embed build/sysroot/etc/casaos/gateway.ini.sample
+	_confSample string
 )
 
 func init() {
@@ -55,6 +60,24 @@ func init() {
 
 	_state = service.NewState()
 
+	// create default config file if not exist
+	ConfigFilePath := filepath.Join(constants.DefaultConfigPath, common.GatewayName+"."+common.GatewayConfigType)
+	if _, err := os.Stat(ConfigFilePath); os.IsNotExist(err) {
+		fmt.Println("config file not exist, create it")
+		// create config file
+		file, err := os.Create(ConfigFilePath)
+		if err != nil {
+			panic(err)
+		}
+		defer file.Close()
+
+		// write default config
+		_, err = file.WriteString(_confSample)
+		if err != nil {
+			panic(err)
+		}
+	}
+
 	config, err := common.LoadConfig()
 	if err != nil {
 		panic(err)