Output directory size in cache command

cmd/restic/cmd_cache.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"os"
 	"path/filepath"
 	"sort"
 	"time"
@@ -29,6 +30,7 @@ The "cache" command allows listing and cleaning local cache directories.
 type CacheOptions struct {
 	Cleanup bool
 	MaxAge  uint
+	NoSize  bool
 }
 
 var cacheOptions CacheOptions
@@ -39,6 +41,7 @@ func init() {
 	f := cmdCache.Flags()
 	f.BoolVar(&cacheOptions.Cleanup, "cleanup", false, "remove old cache directories")
 	f.UintVar(&cacheOptions.MaxAge, "max-age", 30, "max age in `days` for cache directories to be considered old")
+	f.BoolVar(&cacheOptions.NoSize, "no-size", false, "do not output the size of the cache directories")
 }
 
 func runCache(opts CacheOptions, gopts GlobalOptions, args []string) error {
@@ -92,12 +95,17 @@ func runCache(opts CacheOptions, gopts GlobalOptions, args []string) error {
 		ID   string
 		Last string
 		Old  string
+		Size string
 	}
 
 	tab.AddColumn("Repo ID", "{{ .ID }}")
 	tab.AddColumn("Last Used", "{{ .Last }}")
 	tab.AddColumn("Old", "{{ .Old }}")
 
+	if !opts.NoSize {
+		tab.AddColumn("Size", "{{ .Size }}")
+	}
+
 	dirs, err := cache.All(cachedir)
 	if err != nil {
 		return err
@@ -118,10 +126,20 @@ func runCache(opts CacheOptions, gopts GlobalOptions, args []string) error {
 			old = "yes"
 		}
 
+		var size string
+		if !opts.NoSize {
+			bytes, err := dirSize(fmt.Sprintf("%s/%s", cachedir, entry.Name()))
+			if err != nil {
+				return err
+			}
+			size = fmt.Sprintf("%11s", formatBytes(uint64(bytes)))
+		}
+
 		tab.AddRow(data{
 			entry.Name()[:10],
 			fmt.Sprintf("%d days ago", uint(time.Since(entry.ModTime()).Hours()/24)),
 			old,
+			size,
 		})
 	}
 
@@ -130,3 +148,14 @@ func runCache(opts CacheOptions, gopts GlobalOptions, args []string) error {
 
 	return nil
 }
+
+func dirSize(path string) (int64, error) {
+	var size int64
+	err := filepath.Walk(path, func(_ string, info os.FileInfo, err error) error {
+		if !info.IsDir() {
+			size += info.Size()
+		}
+		return err
+	})
+	return size, err
+}