feat: add Set default values from environment variables if not provided for multiple backup

pkg/config.go

@@ -30,6 +30,7 @@ import (
 	"github.com/spf13/cobra"
 	"os"
 	"strconv"
+	"strings"
 )
 
 type Database struct {
@@ -127,6 +128,11 @@ func initDbConfig(cmd *cobra.Command) *dbConfig {
 }
 
 func getDatabase(database Database) *dbConfig {
+	// Set default values from environment variables if not provided
+	database.User = getEnvOrDefault(database.User, "DB_USERNAME", database.Name, "")
+	database.Password = getEnvOrDefault(database.Password, "DB_PASSWORD", database.Name, "")
+	database.Host = getEnvOrDefault(database.Host, "DB_HOST", database.Name, "")
+	database.Port = getEnvOrDefault(database.Port, "DB_PORT", database.Name, "5432")
 	return &dbConfig{
 		dbHost:     database.Host,
 		dbPort:     database.Port,
@@ -136,6 +142,20 @@ func getDatabase(database Database) *dbConfig {
 	}
 }
 
+// Helper function to get environment variable or use a default value
+func getEnvOrDefault(currentValue, envKey, suffix, defaultValue string) string {
+	if currentValue != "" {
+		return currentValue
+	}
+	if suffix != "" {
+		envSuffix := os.Getenv(fmt.Sprintf("%s_%s", envKey, strings.ToUpper(suffix)))
+		if envSuffix != "" {
+			return envSuffix
+		}
+	}
+	return utils.EnvWithDefault(envKey, defaultValue)
+}
+
 // loadSSHConfig loads the SSH configuration from environment variables
 func loadSSHConfig() (*SSHConfig, error) {
 	utils.GetEnvVariable("SSH_HOST", "SSH_HOST_NAME")