Move all of the small-ish tools to be part of btrfs-rec

1 files changed, 68 insertions, 0 deletions

diff --git a/cmd/btrfs-rec/inspect_lstrees.go b/cmd/btrfs-rec/inspect_lstrees.go
new file mode 100644
index 0000000..976514f
--- /dev/null
+++ b/cmd/btrfs-rec/inspect_lstrees.go
@@ -0,0 +1,68 @@
+// Copyright (C) 2022  Luke Shumaker <lukeshu@lukeshu.com>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"text/tabwriter"
+
+	"github.com/datawire/ocibuild/pkg/cliutil"
+	"github.com/spf13/cobra"
+
+	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
+	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsitem"
+	"git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsutil"
+	"git.lukeshu.com/btrfs-progs-ng/lib/util"
+)
+
+func init() {
+	inspectors = append(inspectors, subcommand{
+		Command: cobra.Command{
+			Use:   "ls-trees",
+			Short: "A brief view what types of items are in each tree",
+			Args:  cliutil.WrapPositionalArgs(cobra.NoArgs),
+		},
+		RunE: func(fs *btrfs.FS, _ *cobra.Command, _ []string) error {
+			var treeErrCnt int
+			var treeItemCnt map[btrfsitem.Type]int
+			btrfsutil.WalkAllTrees(fs, btrfsutil.WalkAllTreesHandler{
+				PreTree: func(name string, treeID btrfs.ObjID) {
+					treeErrCnt = 0
+					treeItemCnt = make(map[btrfsitem.Type]int)
+					fmt.Printf("tree id=%v name=%q\n", treeID, name)
+				},
+				Err: func(_ error) {
+					treeErrCnt++
+				},
+				TreeWalkHandler: btrfs.TreeWalkHandler{
+					Item: func(_ btrfs.TreePath, item btrfs.Item) error {
+						typ := item.Head.Key.ItemType
+						treeItemCnt[typ] = treeItemCnt[typ] + 1
+						return nil
+					},
+				},
+				PostTree: func(_ string, _ btrfs.ObjID) {
+					totalItems := 0
+					for _, cnt := range treeItemCnt {
+						totalItems += cnt
+					}
+					numWidth := len(strconv.Itoa(util.Max(treeErrCnt, totalItems)))
+
+					table := tabwriter.NewWriter(os.Stdout, 0, 8, 2, ' ', 0)
+					fmt.Fprintf(table, "        errors\t% *s\n", numWidth, strconv.Itoa(treeErrCnt))
+					for _, typ := range util.SortedMapKeys(treeItemCnt) {
+						fmt.Fprintf(table, "        %v items\t% *s\n", typ, numWidth, strconv.Itoa(treeItemCnt[typ]))
+					}
+					fmt.Fprintf(table, "        total items\t% *s\n", numWidth, strconv.Itoa(totalItems))
+					table.Flush()
+				},
+			})
+
+			return nil
+		},
+	})
+}