Init commit.

Add: simple project structure for `mygo.server`.

Add: README files.

mygo.server/internal/app/version.go

@@ -0,0 +1,3 @@
+package app
+
+const Version = "0.0.1"

mygo.server/internal/config/config.go

@@ -0,0 +1,117 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+type ServerConfig struct {
+	Server struct {
+		Listen string `mapstructure:"listen"`
+		Port   string `mapstructure:"port"`
+	} `mapstructure:"server"`
+
+	Database struct {
+		Type string `mapstructure:"type"`
+		Host string `mapstructure:"host"`
+		// Port int `mapstructure:"port"`
+		// User string `mapstructure:"user"`
+	} `mapstructure:"database"`
+
+	Auth struct {
+		JWTSecret string `mapstructure:"jwt_secret"`
+	} `mapstructure:"auth"`
+
+	Storage struct {
+		Type  string `mapstructure:"type"`
+		Local struct {
+			RootDir string `mapstructure:"root_dir"`
+		} `mapstructure:"local"`
+		S3 struct {
+			Endpoint string `mapstructure:"endpoint"`
+			Bucket   string `mapstructure:"bucket"`
+		} `mapstructure:"s3"`
+	} `mapstructure:"storage"`
+}
+
+func setDefaultConfig(v *viper.Viper) {
+
+}
+
+// Bind Environment Variables to config
+func bindEnvVariables(v *viper.Viper) {
+	// 设置环境变量前缀
+	v.SetEnvPrefix("MYGO")
+
+	// 使viper能够从环境变量读取配置
+	v.AutomaticEnv()
+
+	// 将环境变量中的下划线转换为点，如MYGO_SERVER_PORT对应server.port
+	v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+
+	// 明确绑定特定环境变量
+	// v.BindEnv("server.host", "MYGO_SERVER_HOST")
+	// v.BindEnv("server.port", "MYGO_SERVER_PORT")
+	// v.BindEnv("database.host", "MYGO_DB_HOST")
+	// v.BindEnv("database.port", "MYGO_DB_PORT")
+	// v.BindEnv("database.user", "MYGO_DB_USER")
+	// v.BindEnv("database.password", "MYGO_DB_PASSWORD")
+}
+
+// parseConfig unmarshals viper config into ServerConfig
+func parseConfig(v *viper.Viper) (*ServerConfig, error) {
+	config := &ServerConfig{}
+	if err := v.Unmarshal(config); err != nil {
+		return nil, fmt.Errorf("failed to parse config: %w", err)
+	}
+	return config, nil
+}
+
+// Load config file
+func loadConfigFile(v *viper.Viper, configPath string) (*ServerConfig, error) {
+	v.SetConfigType("yaml")
+
+	if configPath != "" {
+		v.SetConfigFile(configPath)
+		if err := v.ReadInConfig(); err != nil {
+			return nil, fmt.Errorf("failed to load config file %s: %w", configPath, err)
+		}
+		return parseConfig(v)
+	}
+
+	v.SetConfigName("config")
+	configPaths := []string{".", "./config"}
+	for _, path := range configPaths {
+		v.AddConfigPath(path)
+	}
+
+	if err := v.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			return nil, nil // No config file found is not an error
+		}
+		return nil, fmt.Errorf("config file read error: %w", err)
+	}
+	return parseConfig(v)
+}
+
+// LoadConfig is the main entry point for configuration loading
+func LoadConfig(configPath string) (*ServerConfig, error) {
+	v := viper.New()
+	setDefaultConfig(v)
+
+	fileConfig, err := loadConfigFile(v, configPath)
+	if err != nil {
+		return nil, err
+	}
+
+	if fileConfig != nil {
+		fmt.Printf("Loaded config from %s\n", v.ConfigFileUsed())
+	} else {
+		fmt.Println("Using default configuration (no config file found)")
+	}
+
+	bindEnvVariables(v)
+	return parseConfig(v)
+}