mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-10 18:25:17 +00:00
642 lines
18 KiB
Go
642 lines
18 KiB
Go
// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
|
|
// of this source code is governed by a BSD-style license that can be found in
|
|
// the LICENSE file.
|
|
|
|
package tool
|
|
|
|
import (
|
|
"bytes"
|
|
"cmp"
|
|
"fmt"
|
|
"io"
|
|
"slices"
|
|
"sort"
|
|
|
|
"github.com/cockroachdb/pebble"
|
|
"github.com/cockroachdb/pebble/internal/base"
|
|
"github.com/cockroachdb/pebble/internal/keyspan"
|
|
"github.com/cockroachdb/pebble/internal/manifest"
|
|
"github.com/cockroachdb/pebble/internal/private"
|
|
"github.com/cockroachdb/pebble/internal/rangedel"
|
|
"github.com/cockroachdb/pebble/record"
|
|
"github.com/cockroachdb/pebble/sstable"
|
|
"github.com/spf13/cobra"
|
|
)
|
|
|
|
type findRef struct {
|
|
key base.InternalKey
|
|
value []byte
|
|
fileNum base.FileNum
|
|
}
|
|
|
|
// findT implements the find tool.
|
|
//
|
|
// TODO(bananabrick): Add support for virtual sstables in this tool. Currently,
|
|
// the tool will work because we're parsing files from disk, so virtual sstables
|
|
// will never be added to findT.tables. The manifest could contain information
|
|
// about virtual sstables. This is fine because the manifest is only used to
|
|
// compute the findT.editRefs, and editRefs is only used if a file in
|
|
// findT.tables contains a key. Of course, the tool won't be completely
|
|
// accurate without dealing with virtual sstable case.
|
|
type findT struct {
|
|
Root *cobra.Command
|
|
|
|
// Configuration.
|
|
opts *pebble.Options
|
|
comparers sstable.Comparers
|
|
mergers sstable.Mergers
|
|
|
|
// Flags.
|
|
comparerName string
|
|
fmtKey keyFormatter
|
|
fmtValue valueFormatter
|
|
verbose bool
|
|
|
|
// Map from file num to path on disk.
|
|
files map[base.DiskFileNum]string
|
|
// Map from file num to version edit index which references the file num.
|
|
editRefs map[base.FileNum][]int
|
|
// List of version edits.
|
|
edits []manifest.VersionEdit
|
|
// Sorted list of WAL file nums.
|
|
logs []base.DiskFileNum
|
|
// Sorted list of manifest file nums.
|
|
manifests []base.DiskFileNum
|
|
// Sorted list of table file nums.
|
|
tables []base.FileNum
|
|
// Set of tables that contains references to the search key.
|
|
tableRefs map[base.FileNum]bool
|
|
// Map from file num to table metadata.
|
|
tableMeta map[base.FileNum]*manifest.FileMetadata
|
|
// List of error messages for SSTables that could not be decoded.
|
|
errors []string
|
|
}
|
|
|
|
func newFind(
|
|
opts *pebble.Options,
|
|
comparers sstable.Comparers,
|
|
defaultComparer string,
|
|
mergers sstable.Mergers,
|
|
) *findT {
|
|
f := &findT{
|
|
opts: opts,
|
|
comparers: comparers,
|
|
mergers: mergers,
|
|
}
|
|
f.fmtKey.mustSet("quoted")
|
|
f.fmtValue.mustSet("[%x]")
|
|
|
|
f.Root = &cobra.Command{
|
|
Use: "find <dir> <key>",
|
|
Short: "find references to the specified key",
|
|
Long: `
|
|
Find references to the specified key and any range tombstones that contain the
|
|
key. This includes references to the key in WAL files and sstables, and the
|
|
provenance of the sstables (flushed, ingested, compacted).
|
|
`,
|
|
Args: cobra.ExactArgs(2),
|
|
Run: f.run,
|
|
}
|
|
|
|
f.Root.Flags().BoolVarP(
|
|
&f.verbose, "verbose", "v", false, "verbose output")
|
|
f.Root.Flags().StringVar(
|
|
&f.comparerName, "comparer", defaultComparer, "comparer name")
|
|
f.Root.Flags().Var(
|
|
&f.fmtKey, "key", "key formatter")
|
|
f.Root.Flags().Var(
|
|
&f.fmtValue, "value", "value formatter")
|
|
return f
|
|
}
|
|
|
|
func (f *findT) run(cmd *cobra.Command, args []string) {
|
|
stdout, stderr := cmd.OutOrStdout(), cmd.OutOrStderr()
|
|
var key key
|
|
if err := key.Set(args[1]); err != nil {
|
|
fmt.Fprintf(stdout, "%s\n", err)
|
|
return
|
|
}
|
|
|
|
if err := f.findFiles(stdout, stderr, args[0]); err != nil {
|
|
fmt.Fprintf(stdout, "%s\n", err)
|
|
return
|
|
}
|
|
f.readManifests(stdout)
|
|
|
|
f.opts.Comparer = f.comparers[f.comparerName]
|
|
if f.opts.Comparer == nil {
|
|
fmt.Fprintf(stderr, "unknown comparer %q", f.comparerName)
|
|
return
|
|
}
|
|
f.fmtKey.setForComparer(f.opts.Comparer.Name, f.comparers)
|
|
f.fmtValue.setForComparer(f.opts.Comparer.Name, f.comparers)
|
|
|
|
refs := f.search(stdout, key)
|
|
var lastFileNum base.FileNum
|
|
for i := range refs {
|
|
r := &refs[i]
|
|
if lastFileNum != r.fileNum {
|
|
lastFileNum = r.fileNum
|
|
fmt.Fprintf(stdout, "%s", f.opts.FS.PathBase(f.files[r.fileNum.DiskFileNum()]))
|
|
if m := f.tableMeta[r.fileNum]; m != nil {
|
|
fmt.Fprintf(stdout, " ")
|
|
formatKeyRange(stdout, f.fmtKey, &m.Smallest, &m.Largest)
|
|
}
|
|
fmt.Fprintf(stdout, "\n")
|
|
if p := f.tableProvenance(r.fileNum); p != "" {
|
|
fmt.Fprintf(stdout, " (%s)\n", p)
|
|
}
|
|
}
|
|
fmt.Fprintf(stdout, " ")
|
|
formatKeyValue(stdout, f.fmtKey, f.fmtValue, &r.key, r.value)
|
|
}
|
|
|
|
for _, errorMsg := range f.errors {
|
|
fmt.Fprint(stdout, errorMsg)
|
|
}
|
|
}
|
|
|
|
// Find all of the manifests, logs, and tables in the specified directory.
|
|
func (f *findT) findFiles(stdout, stderr io.Writer, dir string) error {
|
|
f.files = make(map[base.DiskFileNum]string)
|
|
f.editRefs = make(map[base.FileNum][]int)
|
|
f.logs = nil
|
|
f.manifests = nil
|
|
f.tables = nil
|
|
f.tableMeta = make(map[base.FileNum]*manifest.FileMetadata)
|
|
|
|
if _, err := f.opts.FS.Stat(dir); err != nil {
|
|
return err
|
|
}
|
|
|
|
walk(stderr, f.opts.FS, dir, func(path string) {
|
|
ft, fileNum, ok := base.ParseFilename(f.opts.FS, path)
|
|
if !ok {
|
|
return
|
|
}
|
|
switch ft {
|
|
case base.FileTypeLog:
|
|
f.logs = append(f.logs, fileNum)
|
|
case base.FileTypeManifest:
|
|
f.manifests = append(f.manifests, fileNum)
|
|
case base.FileTypeTable:
|
|
f.tables = append(f.tables, fileNum.FileNum())
|
|
default:
|
|
return
|
|
}
|
|
f.files[fileNum] = path
|
|
})
|
|
|
|
slices.Sort(f.logs)
|
|
slices.Sort(f.manifests)
|
|
slices.Sort(f.tables)
|
|
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, "%s\n", dir)
|
|
fmt.Fprintf(stdout, "%5d %s\n", len(f.manifests), makePlural("manifest", int64(len(f.manifests))))
|
|
fmt.Fprintf(stdout, "%5d %s\n", len(f.logs), makePlural("log", int64(len(f.logs))))
|
|
fmt.Fprintf(stdout, "%5d %s\n", len(f.tables), makePlural("sstable", int64(len(f.tables))))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Read the manifests and populate the editRefs map which is used to determine
|
|
// the provenance and metadata of tables.
|
|
func (f *findT) readManifests(stdout io.Writer) {
|
|
for _, fileNum := range f.manifests {
|
|
func() {
|
|
path := f.files[fileNum]
|
|
mf, err := f.opts.FS.Open(path)
|
|
if err != nil {
|
|
fmt.Fprintf(stdout, "%s\n", err)
|
|
return
|
|
}
|
|
defer mf.Close()
|
|
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, "%s\n", path)
|
|
}
|
|
|
|
rr := record.NewReader(mf, 0 /* logNum */)
|
|
for {
|
|
r, err := rr.Next()
|
|
if err != nil {
|
|
if err != io.EOF {
|
|
fmt.Fprintf(stdout, "%s: %s\n", path, err)
|
|
}
|
|
break
|
|
}
|
|
|
|
var ve manifest.VersionEdit
|
|
if err := ve.Decode(r); err != nil {
|
|
fmt.Fprintf(stdout, "%s: %s\n", path, err)
|
|
break
|
|
}
|
|
i := len(f.edits)
|
|
f.edits = append(f.edits, ve)
|
|
|
|
if ve.ComparerName != "" {
|
|
f.comparerName = ve.ComparerName
|
|
}
|
|
if num := ve.MinUnflushedLogNum.FileNum(); num != 0 {
|
|
f.editRefs[num] = append(f.editRefs[num], i)
|
|
}
|
|
for df := range ve.DeletedFiles {
|
|
f.editRefs[df.FileNum] = append(f.editRefs[df.FileNum], i)
|
|
}
|
|
for _, nf := range ve.NewFiles {
|
|
// The same file can be deleted and added in a single version edit
|
|
// which indicates a "move" compaction. Only add the edit to the list
|
|
// once.
|
|
refs := f.editRefs[nf.Meta.FileNum]
|
|
if n := len(refs); n == 0 || refs[n-1] != i {
|
|
f.editRefs[nf.Meta.FileNum] = append(refs, i)
|
|
}
|
|
if _, ok := f.tableMeta[nf.Meta.FileNum]; !ok {
|
|
f.tableMeta[nf.Meta.FileNum] = nf.Meta
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, "%5d %s\n", len(f.edits), makePlural("edit", int64(len(f.edits))))
|
|
}
|
|
}
|
|
|
|
// Search the logs and sstables for references to the specified key.
|
|
func (f *findT) search(stdout io.Writer, key []byte) []findRef {
|
|
refs := f.searchLogs(stdout, key, nil)
|
|
refs = f.searchTables(stdout, key, refs)
|
|
|
|
// For a given file (log or table) the references are already in the correct
|
|
// order. We simply want to order the references by fileNum using a stable
|
|
// sort.
|
|
//
|
|
// TODO(peter): I'm not sure if this is perfectly correct with regards to log
|
|
// files and ingested sstables, but it is close enough and doing something
|
|
// better is onerous. Revisit if this ever becomes problematic (e.g. if we
|
|
// allow finding more than one key at a time).
|
|
//
|
|
// An example of the problem with logs and ingestion (which can only occur
|
|
// with distinct keys). If I write key "a" to a log, I can then ingested key
|
|
// "b" without causing "a" to be flushed. Then I can write key "c" to the
|
|
// log. Ideally, we'd show the key "a" from the log, then the key "b" from
|
|
// the ingested sstable, then key "c" from the log.
|
|
slices.SortStableFunc(refs, func(a, b findRef) int {
|
|
return cmp.Compare(a.fileNum, b.fileNum)
|
|
})
|
|
return refs
|
|
}
|
|
|
|
// Search the logs for references to the specified key.
|
|
func (f *findT) searchLogs(stdout io.Writer, searchKey []byte, refs []findRef) []findRef {
|
|
cmp := f.opts.Comparer.Compare
|
|
for _, fileNum := range f.logs {
|
|
_ = func() (err error) {
|
|
path := f.files[fileNum]
|
|
lf, err := f.opts.FS.Open(path)
|
|
if err != nil {
|
|
fmt.Fprintf(stdout, "%s\n", err)
|
|
return
|
|
}
|
|
defer lf.Close()
|
|
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, "%s", path)
|
|
defer fmt.Fprintf(stdout, "\n")
|
|
}
|
|
defer func() {
|
|
switch err {
|
|
case record.ErrZeroedChunk:
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, ": EOF [%s] (may be due to WAL preallocation)", err)
|
|
}
|
|
case record.ErrInvalidChunk:
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, ": EOF [%s] (may be due to WAL recycling)", err)
|
|
}
|
|
default:
|
|
if err != io.EOF {
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, ": %s", err)
|
|
} else {
|
|
fmt.Fprintf(stdout, "%s: %s\n", path, err)
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
|
|
var b pebble.Batch
|
|
var buf bytes.Buffer
|
|
rr := record.NewReader(lf, fileNum)
|
|
for {
|
|
r, err := rr.Next()
|
|
if err == nil {
|
|
buf.Reset()
|
|
_, err = io.Copy(&buf, r)
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
b = pebble.Batch{}
|
|
if err := b.SetRepr(buf.Bytes()); err != nil {
|
|
fmt.Fprintf(stdout, "%s: corrupt log file: %v", path, err)
|
|
continue
|
|
}
|
|
seqNum := b.SeqNum()
|
|
for r := b.Reader(); ; seqNum++ {
|
|
kind, ukey, value, ok, err := r.Next()
|
|
if !ok {
|
|
if err != nil {
|
|
fmt.Fprintf(stdout, "%s: corrupt log file: %v", path, err)
|
|
break
|
|
}
|
|
break
|
|
}
|
|
ikey := base.MakeInternalKey(ukey, seqNum, kind)
|
|
switch kind {
|
|
case base.InternalKeyKindDelete,
|
|
base.InternalKeyKindDeleteSized,
|
|
base.InternalKeyKindSet,
|
|
base.InternalKeyKindMerge,
|
|
base.InternalKeyKindSingleDelete,
|
|
base.InternalKeyKindSetWithDelete:
|
|
if cmp(searchKey, ikey.UserKey) != 0 {
|
|
continue
|
|
}
|
|
case base.InternalKeyKindRangeDelete:
|
|
// Output tombstones that contain or end with the search key.
|
|
t := rangedel.Decode(ikey, value, nil)
|
|
if !t.Contains(cmp, searchKey) && cmp(t.End, searchKey) != 0 {
|
|
continue
|
|
}
|
|
default:
|
|
continue
|
|
}
|
|
|
|
refs = append(refs, findRef{
|
|
key: ikey.Clone(),
|
|
value: append([]byte(nil), value...),
|
|
fileNum: fileNum.FileNum(),
|
|
})
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
return refs
|
|
}
|
|
|
|
// Search the tables for references to the specified key.
|
|
func (f *findT) searchTables(stdout io.Writer, searchKey []byte, refs []findRef) []findRef {
|
|
cache := pebble.NewCache(128 << 20 /* 128 MB */)
|
|
defer cache.Unref()
|
|
|
|
f.tableRefs = make(map[base.FileNum]bool)
|
|
for _, fileNum := range f.tables {
|
|
_ = func() (err error) {
|
|
path := f.files[fileNum.DiskFileNum()]
|
|
tf, err := f.opts.FS.Open(path)
|
|
if err != nil {
|
|
fmt.Fprintf(stdout, "%s\n", err)
|
|
return
|
|
}
|
|
|
|
m := f.tableMeta[fileNum]
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, "%s", path)
|
|
if m != nil && m.SmallestSeqNum == m.LargestSeqNum {
|
|
fmt.Fprintf(stdout, ": global seqnum: %d", m.LargestSeqNum)
|
|
}
|
|
defer fmt.Fprintf(stdout, "\n")
|
|
}
|
|
defer func() {
|
|
switch {
|
|
case err != nil:
|
|
if f.verbose {
|
|
fmt.Fprintf(stdout, ": %v", err)
|
|
} else {
|
|
fmt.Fprintf(stdout, "%s: %v\n", path, err)
|
|
}
|
|
}
|
|
}()
|
|
|
|
opts := sstable.ReaderOptions{
|
|
Cache: cache,
|
|
Comparer: f.opts.Comparer,
|
|
Filters: f.opts.Filters,
|
|
}
|
|
readable, err := sstable.NewSimpleReadable(tf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
r, err := sstable.NewReader(readable, opts, f.comparers, f.mergers,
|
|
private.SSTableRawTombstonesOpt.(sstable.ReaderOption))
|
|
if err != nil {
|
|
f.errors = append(f.errors, fmt.Sprintf("Unable to decode sstable %s, %s", f.files[fileNum.DiskFileNum()], err.Error()))
|
|
// Ensure the error only gets printed once.
|
|
err = nil
|
|
return
|
|
}
|
|
defer r.Close()
|
|
|
|
if m != nil && m.SmallestSeqNum == m.LargestSeqNum {
|
|
r.Properties.GlobalSeqNum = m.LargestSeqNum
|
|
}
|
|
|
|
iter, err := r.NewIter(nil, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer iter.Close()
|
|
key, value := iter.SeekGE(searchKey, base.SeekGEFlagsNone)
|
|
|
|
// We configured sstable.Reader to return raw tombstones which requires a
|
|
// bit more work here to put them in a form that can be iterated in
|
|
// parallel with the point records.
|
|
rangeDelIter, err := func() (keyspan.FragmentIterator, error) {
|
|
iter, err := r.NewRawRangeDelIter()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if iter == nil {
|
|
return keyspan.NewIter(r.Compare, nil), nil
|
|
}
|
|
defer iter.Close()
|
|
|
|
var tombstones []keyspan.Span
|
|
for t := iter.First(); t != nil; t = iter.Next() {
|
|
if !t.Contains(r.Compare, searchKey) {
|
|
continue
|
|
}
|
|
tombstones = append(tombstones, t.ShallowClone())
|
|
}
|
|
|
|
slices.SortFunc(tombstones, func(a, b keyspan.Span) int {
|
|
return r.Compare(a.Start, b.Start)
|
|
})
|
|
return keyspan.NewIter(r.Compare, tombstones), nil
|
|
}()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
defer rangeDelIter.Close()
|
|
rangeDel := rangeDelIter.First()
|
|
|
|
foundRef := false
|
|
for key != nil || rangeDel != nil {
|
|
if key != nil &&
|
|
(rangeDel == nil || r.Compare(key.UserKey, rangeDel.Start) < 0) {
|
|
if r.Compare(searchKey, key.UserKey) != 0 {
|
|
key, value = nil, base.LazyValue{}
|
|
continue
|
|
}
|
|
v, _, err := value.Value(nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
refs = append(refs, findRef{
|
|
key: key.Clone(),
|
|
value: append([]byte(nil), v...),
|
|
fileNum: fileNum,
|
|
})
|
|
key, value = iter.Next()
|
|
} else {
|
|
// Use rangedel.Encode to add a reference for each key
|
|
// within the span.
|
|
err := rangedel.Encode(rangeDel, func(k base.InternalKey, v []byte) error {
|
|
refs = append(refs, findRef{
|
|
key: k.Clone(),
|
|
value: append([]byte(nil), v...),
|
|
fileNum: fileNum,
|
|
})
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
rangeDel = rangeDelIter.Next()
|
|
}
|
|
foundRef = true
|
|
}
|
|
|
|
if foundRef {
|
|
f.tableRefs[fileNum] = true
|
|
}
|
|
return nil
|
|
}()
|
|
}
|
|
return refs
|
|
}
|
|
|
|
// Determine the provenance of the specified table. We search the version edits
|
|
// for the first edit which created the table, and then analyze the edit to
|
|
// determine if it was a compaction, flush, or ingestion. Returns an empty
|
|
// string if the provenance of a table cannot be determined.
|
|
func (f *findT) tableProvenance(fileNum base.FileNum) string {
|
|
editRefs := f.editRefs[fileNum]
|
|
for len(editRefs) > 0 {
|
|
ve := f.edits[editRefs[0]]
|
|
editRefs = editRefs[1:]
|
|
for _, nf := range ve.NewFiles {
|
|
if fileNum != nf.Meta.FileNum {
|
|
continue
|
|
}
|
|
|
|
var buf bytes.Buffer
|
|
switch {
|
|
case len(ve.DeletedFiles) > 0:
|
|
// A version edit with deleted files is a compaction. The deleted
|
|
// files are the inputs to the compaction. We're going to
|
|
// reconstruct the input files and display those inputs that
|
|
// contain the search key (i.e. are list in refs) and use an
|
|
// ellipsis to indicate when there were other inputs that have
|
|
// been elided.
|
|
var sourceLevels []int
|
|
levels := make(map[int][]base.FileNum)
|
|
for df := range ve.DeletedFiles {
|
|
files := levels[df.Level]
|
|
if len(files) == 0 {
|
|
sourceLevels = append(sourceLevels, df.Level)
|
|
}
|
|
levels[df.Level] = append(files, df.FileNum)
|
|
}
|
|
|
|
sort.Ints(sourceLevels)
|
|
if sourceLevels[len(sourceLevels)-1] != nf.Level {
|
|
sourceLevels = append(sourceLevels, nf.Level)
|
|
}
|
|
|
|
sep := " "
|
|
fmt.Fprintf(&buf, "compacted")
|
|
for _, level := range sourceLevels {
|
|
files := levels[level]
|
|
slices.Sort(files)
|
|
|
|
fmt.Fprintf(&buf, "%sL%d [", sep, level)
|
|
sep = ""
|
|
elided := false
|
|
for _, fileNum := range files {
|
|
if f.tableRefs[fileNum] {
|
|
fmt.Fprintf(&buf, "%s%s", sep, fileNum)
|
|
sep = " "
|
|
} else {
|
|
elided = true
|
|
}
|
|
}
|
|
if elided {
|
|
fmt.Fprintf(&buf, "%s...", sep)
|
|
}
|
|
fmt.Fprintf(&buf, "]")
|
|
sep = " + "
|
|
}
|
|
|
|
case ve.MinUnflushedLogNum != 0:
|
|
// A version edit with a min-unflushed log indicates a flush
|
|
// operation.
|
|
fmt.Fprintf(&buf, "flushed to L%d", nf.Level)
|
|
|
|
case nf.Meta.SmallestSeqNum == nf.Meta.LargestSeqNum:
|
|
// If the smallest and largest seqnum are the same, the file was
|
|
// ingested. Note that this can also occur for a flushed sstable
|
|
// that contains only a single key, though that would have
|
|
// already been captured above.
|
|
fmt.Fprintf(&buf, "ingested to L%d", nf.Level)
|
|
|
|
default:
|
|
// The provenance of the table is unclear. This is usually due to
|
|
// the MANIFEST rolling over and taking a snapshot of the LSM
|
|
// state.
|
|
fmt.Fprintf(&buf, "added to L%d", nf.Level)
|
|
}
|
|
|
|
// After a table is created, it can be moved to a different level via a
|
|
// move compaction. This is indicated by a version edit that deletes the
|
|
// table from one level and adds the same table to a different
|
|
// level. Loop over the remaining version edits for the table looking for
|
|
// such moves.
|
|
for len(editRefs) > 0 {
|
|
ve := f.edits[editRefs[0]]
|
|
editRefs = editRefs[1:]
|
|
for _, nf := range ve.NewFiles {
|
|
if fileNum == nf.Meta.FileNum {
|
|
for df := range ve.DeletedFiles {
|
|
if fileNum == df.FileNum {
|
|
fmt.Fprintf(&buf, ", moved to L%d", nf.Level)
|
|
break
|
|
}
|
|
}
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
return buf.String()
|
|
}
|
|
}
|
|
return ""
|
|
}
|