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|
package env
import (
"os"
"reflect"
"strconv"
"strings"
"time"
)
func getEnv(key, defaultVal string) string {
if value := os.Getenv(key); value != "" {
return value
}
return defaultVal
}
func getEnvBool(key string, defaultVal bool) bool {
if value := os.Getenv(key); value != "" {
if parsed, err := strconv.ParseBool(value); err == nil {
return parsed
}
}
return defaultVal
}
func getEnvDuration(key string, defaultVal time.Duration) time.Duration {
if value := os.Getenv(key); value != "" {
if parsed, err := time.ParseDuration(value); err == nil {
return parsed
}
}
return defaultVal
}
func getEnvInt(key string, defaultVal int64) int64 {
if value := os.Getenv(key); value != "" {
if parsed, err := strconv.ParseInt(value, 10, 64); err == nil {
return parsed
}
}
return defaultVal
}
func getEnvFloat(key string, defaultVal float64) float64 {
if value := os.Getenv(key); value != "" {
if parsed, err := strconv.ParseFloat(value, 64); err == nil {
return parsed
}
}
return defaultVal
}
func getEnvStringSlice(key string, defaultVal []string) []string {
if value := os.Getenv(key); value != "" {
parts := strings.Split(value, ",")
result := make([]string, 0, len(parts))
for _, part := range parts {
trimmed := strings.TrimSpace(part)
if trimmed != "" {
result = append(result, trimmed)
}
}
return result
}
return defaultVal
}
func Defaults[T any](config *T) *T {
v := reflect.ValueOf(config)
if v.Kind() != reflect.Ptr || v.Elem().Kind() != reflect.Struct {
return config
}
elem := v.Elem()
t := elem.Type()
newStruct := reflect.New(t)
newElem := newStruct.Elem()
for i := range elem.NumField() {
field := newElem.Field(i)
fieldType := t.Field(i)
if !field.CanSet() {
continue
}
defaultVal := fieldType.Tag.Get("default")
if defaultVal == "" {
continue
}
setFieldDefault(field, defaultVal)
}
return newStruct.Interface().(*T)
}
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