go-base/config/loader.go

package config

import (
	"fmt"
	"log"
	"os"
	"path/filepath"

	"git.x2erp.com/qdy/go-base/config/subconfigs"
	"gopkg.in/yaml.v2"
)

// LoadConfig 加载配置到注册表
func LoadConfig() error {
	// 1. 设置所有注册配置的默认值
	for _, config := range subconfigs.GetAllConfigs() {
		config.SetDefaults()
	}

	// 2. 查找配置文件
	configFile, err := findConfigFile()
	if err != nil {
		return err
	}

	// 3. 读取文件
	data, err := os.ReadFile(configFile)
	if err != nil {
		return fmt.Errorf("read config file error: %v", err)
	}

	// 4. 解析为map
	var rawConfig map[string]interface{}
	err = yaml.Unmarshal(data, &rawConfig)
	if err != nil {
		return fmt.Errorf("parse yaml error: %v", err)
	}

	// 5. 循环注册表，为每个配置加载数据
	for name, config := range subconfigs.GetAllConfigs() {
		if configData, ok := rawConfig[name].(map[interface{}]interface{}); ok {
			// 转换为 map[string]interface{}
			strMap := convertMap(configData)
			if err := config.Load(strMap); err != nil {
				return fmt.Errorf("load config %s error: %v", name, err)
			}
		}
	}

	// // 6. 验证所有配置
	// for name, config := range subconfigs.GetAllConfigs() {
	// 	if err := config.Validate(); err != nil {
	// 		return fmt.Errorf("validate config %s error: %v", name, err)
	// 	}
	// }

	return nil
}

// convertMap 转换map类型
func convertMap(input map[interface{}]interface{}) map[string]interface{} {
	output := make(map[string]interface{})
	for k, v := range input {
		if strKey, ok := k.(string); ok {
			output[strKey] = v
		}
	}
	return output
}

// findConfigFile 查找配置文件
func findConfigFile() (string, error) {
	exePath, _ := os.Executable()
	exeDir := filepath.Dir(exePath)

	possiblePaths := []string{
		filepath.Join(exeDir, "db.yaml"),
		filepath.Join(exeDir, "config", "db.yaml"),
		"db.yaml",
		"config/db.yaml",
		os.Getenv("DB_CONFIG_PATH"),
	}

	for _, path := range possiblePaths {
		if path == "" {
			continue
		}
		if _, err := os.Stat(path); err == nil {
			log.Printf("✅ Using config file: %s\n", path)
			return path, nil
		}
	}

	//return "", fmt.Errorf("no configuration file found")

	return "", fmt.Errorf(`no configuration file found

Searched locations:
1. %s
2. %s
3. ./db.yaml
4. ./config/db.yaml
5. DB_CONFIG_PATH环境变量指定的路径

请确保配置文件存在，或通过环境变量指定：
export DB_CONFIG_PATH=/your/config/path/db.yaml
set DB_CONFIG_PATH=C:\your\config\path\db.yaml (Windows)`,
		filepath.Join(exeDir, "db.yaml"),
		filepath.Join(exeDir, "config", "db.yaml"))
}