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|
package env
import (
"os"
"reflect"
"strconv"
"strings"
"time"
)
func setFieldFromEnv(field reflect.Value, envKey, defaultVal string) {
switch field.Kind() {
case reflect.String:
field.SetString(getEnv(envKey, defaultVal))
case reflect.Bool:
defaultBool, _ := strconv.ParseBool(defaultVal)
field.SetBool(getEnvBool(envKey, defaultBool))
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
defaultInt, _ := strconv.ParseInt(defaultVal, 10, 64)
field.SetInt(getEnvInt(envKey, defaultInt))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
defaultUint, _ := strconv.ParseUint(defaultVal, 10, 64)
setUintField(field, envKey, defaultUint)
case reflect.Float32, reflect.Float64:
defaultFloat, _ := strconv.ParseFloat(defaultVal, 64)
field.SetFloat(getEnvFloat(envKey, defaultFloat))
case reflect.Slice:
setSliceField(field, envKey, defaultVal)
default:
setDurationField(field, envKey, defaultVal)
}
}
func setUintField(field reflect.Value, envKey string, defaultVal uint64) {
if value := os.Getenv(envKey); value != "" {
if parsed, err := strconv.ParseUint(value, 10, 64); err == nil {
field.SetUint(parsed)
return
}
}
field.SetUint(defaultVal)
}
func setDurationField(field reflect.Value, envKey, defaultVal string) {
if field.Type() == reflect.TypeFor[time.Duration]() {
defaultDuration, _ := time.ParseDuration(defaultVal)
field.Set(reflect.ValueOf(getEnvDuration(envKey, defaultDuration)))
}
}
func setSliceField(field reflect.Value, envKey, defaultVal string) {
if field.Type().Elem().Kind() == reflect.String {
var defaultSlice []string
if defaultVal != "" {
parts := strings.SplitSeq(defaultVal, ",")
for part := range parts {
trimmed := strings.TrimSpace(part)
if trimmed != "" {
defaultSlice = append(defaultSlice, trimmed)
}
}
}
result := getEnvStringSlice(envKey, defaultSlice)
field.Set(reflect.ValueOf(result))
}
}
func setFieldDefault(field reflect.Value, defaultVal string) {
switch field.Kind() {
case reflect.String:
field.SetString(defaultVal)
case reflect.Bool:
if defaultBool, err := strconv.ParseBool(defaultVal); err == nil {
field.SetBool(defaultBool)
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
if defaultInt, err := strconv.ParseInt(defaultVal, 10, 64); err == nil {
field.SetInt(defaultInt)
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
if defaultUint, err := strconv.ParseUint(defaultVal, 10, 64); err == nil {
field.SetUint(defaultUint)
}
case reflect.Float32, reflect.Float64:
if defaultFloat, err := strconv.ParseFloat(defaultVal, 64); err == nil {
field.SetFloat(defaultFloat)
}
case reflect.Slice:
if field.Type().Elem().Kind() == reflect.String && defaultVal != "" {
parts := strings.Split(defaultVal, ",")
result := make([]string, 0, len(parts))
for _, part := range parts {
trimmed := strings.TrimSpace(part)
if trimmed != "" {
result = append(result, trimmed)
}
}
field.Set(reflect.ValueOf(result))
}
default:
if field.Type() == reflect.TypeFor[time.Duration]() {
if defaultDuration, err := time.ParseDuration(defaultVal); err == nil {
field.Set(reflect.ValueOf(defaultDuration))
}
}
}
}
|
