feat: docker compose backup

cmd/backup/list.go

@@ -0,0 +1,83 @@
+package backup
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"git.misaka.ren/M1saka/docker_backup/internal/backup"
+	"git.misaka.ren/M1saka/docker_backup/internal/config"
+)
+
+var listCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List configured projects and their backups",
+	RunE:  runList,
+}
+
+func init() {
+	rootCmd.AddCommand(listCmd)
+}
+
+func runList(cmd *cobra.Command, args []string) error {
+	cfg, err := config.Load(cfgFile)
+	if err != nil {
+		return fmt.Errorf("load config: %w", err)
+	}
+
+	fmt.Printf("Config: %s\n\n", cfgFile)
+
+	for _, proj := range cfg.Projects {
+		fmt.Printf("  [%s]\n", proj.Name)
+		fmt.Printf("    path:         %s\n", proj.Path)
+		fmt.Printf("    compose_file: %s\n", proj.ComposeFile)
+		if proj.Cron != "" {
+			fmt.Printf("    cron:         %s\n", proj.Cron)
+		}
+		if len(proj.Exclude) > 0 {
+			fmt.Printf("    exclude:      %s\n", strings.Join(proj.Exclude, ", "))
+		}
+		fmt.Printf("    retention:    %d copies", proj.Retention.Count)
+		if proj.Retention.Days > 0 {
+			fmt.Printf(", %d days", proj.Retention.Days)
+		}
+		fmt.Println()
+
+		// List existing backups.
+		backupDir := filepath.Join(cfg.Global.BackupDir, proj.Name)
+		entries, err := os.ReadDir(backupDir)
+		if err != nil {
+			fmt.Printf("    backups:      none (dir not found)\n\n")
+			continue
+		}
+
+		var backups []string
+		for _, e := range entries {
+			if !e.IsDir() {
+				backups = append(backups, e.Name())
+			}
+		}
+		sort.Sort(sort.Reverse(sort.StringSlice(backups)))
+
+		if len(backups) == 0 {
+			fmt.Printf("    backups:      none\n\n")
+			continue
+		}
+
+		fmt.Printf("    backups:\n")
+		for _, b := range backups {
+			info, _ := os.Stat(filepath.Join(backupDir, b))
+			size := ""
+			if info != nil {
+				size = backup.FormatSize(info.Size())
+			}
+			fmt.Printf("      %s  %s\n", b, size)
+		}
+		fmt.Println()
+	}
+
+	return nil
+}