feat: docker compose backup

cmd/backup/daemon.go

@@ -0,0 +1,39 @@
+package backup
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"git.misaka.ren/M1saka/docker_backup/internal/config"
+	"git.misaka.ren/M1saka/docker_backup/internal/scheduler"
+)
+
+var daemonCmd = &cobra.Command{
+	Use:   "daemon",
+	Short: "Run as a background daemon with cron scheduling",
+	Long:  `Start the backup daemon that runs scheduled backups according to each project's cron expression.`,
+	RunE:  runDaemon,
+}
+
+func init() {
+	rootCmd.AddCommand(daemonCmd)
+}
+
+func runDaemon(cmd *cobra.Command, args []string) error {
+	cfg, err := config.Load(cfgFile)
+	if err != nil {
+		return fmt.Errorf("load config: %w", err)
+	}
+
+	if !cfg.HasCron() {
+		return fmt.Errorf("no projects have cron expressions configured - cannot start daemon")
+	}
+
+	sched, err := scheduler.New(cfg, dryRun)
+	if err != nil {
+		return fmt.Errorf("create scheduler: %w", err)
+	}
+
+	fmt.Println("Starting backup daemon...")
+	return sched.Run(cmd.Context())
+}