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code/allapp/allapp-go-v3/internal/config/config.go

@@ -0,0 +1,21 @@
+package config
+
+type Config struct {
+	App      AppConfig      `mapstructure:"app"`
+	Postgres PostgresConfig `mapstructure:"postgres"`
+}
+
+type AppConfig struct {
+	Name string `mapstructure:"name"`
+	Port int    `mapstructure:"port"`
+}
+
+type PostgresConfig struct {
+	Host     string `mapstructure:"host"`
+	Port     int    `mapstructure:"port"`
+	User     string `mapstructure:"user"`
+	Password string `mapstructure:"password"`
+	Dbname   string `mapstructure:"dbname"`
+	SslMode  bool   `mapstructure:"ssl_mode"`
+	TimeZone string `mapstructure:"timezone"`
+}

code/allapp/allapp-go-v3/internal/config/loader.go

@@ -0,0 +1,50 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+func Load() (*Config, error) {
+	env := getEnv("APP_ENV", "dev")
+
+	v := viper.New()
+	v.SetConfigType("yaml")
+
+	// 基础配置
+	v.AddConfigPath("configs")
+	v.SetConfigName("config")
+
+	if err := v.ReadInConfig(); err != nil {
+		return nil, fmt.Errorf("read base config failed: %w", err)
+	}
+
+	// 环境配置（覆盖）
+	envConfigName := fmt.Sprintf("config.%s", env)
+	v.SetConfigName(envConfigName)
+
+	if err := v.MergeInConfig(); err != nil {
+		// dev 允许没有文件，prod 建议必须存在
+		if env == "prod" {
+			return nil, fmt.Errorf("read env config failed: %w", err)
+		}
+	}
+
+	var cfg Config
+	if err := v.Unmarshal(&cfg); err != nil {
+		return nil, fmt.Errorf("unmarshal config failed: %w", err)
+	}
+
+	return &cfg, nil
+}
+
+func getEnv(key, defaultVal string) string {
+	val := os.Getenv(key)
+	if val == "" {
+		return defaultVal
+	}
+	return strings.ToLower(val)
+}