rdev/internal/envutil/envutil.go

// Package envutil provides environment variable helpers with defaults.
//
// rdev uses os.Getenv() directly rather than Viper because:
//   - rdev always runs in Kubernetes with env vars injected via ConfigMaps/Secrets
//   - rdev has a credential store overlay (loadInfraConfig) that Viper can't model
//   - Adding Viper would add complexity without functional benefit for this use case
//
// Generated projects (skeleton templates) use Viper because:
//   - App services benefit from .env file loading during development
//   - Viper provides built-in duration parsing, type coercion, and defaults
//   - App config is simpler (no credential store overlay)
//
// This divergence is intentional. See: .claude/guides/services/templates.md
package envutil

import (
	"os"
	"strconv"
	"strings"
)

// GetEnv returns the environment variable value or the default.
func GetEnv(key, defaultVal string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return defaultVal
}

// GetEnvInt returns the environment variable as an int or the default.
func GetEnvInt(key string, defaultVal int) int {
	v := os.Getenv(key)
	if v == "" {
		return defaultVal
	}
	if i, err := strconv.Atoi(v); err == nil {
		return i
	}
	return defaultVal
}

// GetEnvBool returns the environment variable as a bool or the default.
func GetEnvBool(key string, defaultVal bool) bool {
	v := os.Getenv(key)
	if v == "" {
		return defaultVal
	}
	v = strings.ToLower(v)
	return v == "true" || v == "1" || v == "yes"
}