Added option to run local (rsync) or cloud (rclone) backups, in case you prefer a "full" copy with hardlinks via rsync, or latest/incremental snapshots via rclone

lib/config/config.go

@@ -0,0 +1,36 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/spf13/viper"
+)
+
+type Config struct {
+	Source           string `mapstructure:"source"`
+	Destination      string `mapstructure:"destination"`
+	Workers          int    `mapstructure:"workers"`
+	KeepIncrementals int    `mapstructure:"keep_incrementals"`
+	Verbose          bool   `mapstructure:"verbose"`
+}
+
+// Load unmarshals the current Viper state into a Config struct and validates it.
+func Load() (*Config, error) {
+	var cfg Config
+	if err := viper.Unmarshal(&cfg); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal configuration: %w", err)
+	}
+
+	if cfg.Source == "" {
+		return nil, errors.New("source path must be specified")
+	}
+	if cfg.Destination == "" {
+		return nil, errors.New("destination path must be specified")
+	}
+	if cfg.KeepIncrementals < 0 {
+		cfg.KeepIncrementals = 0
+	}
+
+	return &cfg, nil
+}