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index: deprecate legacy index format

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This commit is contained in:
Michael Eischer 2024-03-09 18:20:52 +01:00
parent 396a61a992
commit 1a8bf358f1
4 changed files with 13 additions and 2 deletions
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BIN
cmd/restic/testdata/repo-restore-permissions-test.tar.gz vendored
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2
internal/feature/registry.go
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@ -6,10 +6,12 @@ var Flag = New()
// flag names are written in kebab-case
const (
ExampleFeature FlagName = "example-feature"
DeprecateLegacyIndex FlagName = "deprecate-legacy-index"
)
func init() {
Flag.SetFlags(map[FlagName]FlagDesc{
ExampleFeature: {Type: Alpha, Description: "just for testing"},
DeprecateLegacyIndex: {Type: Beta, Description: "disable support for index format used by restic 0.1.0. Use `restic repair index` to update the index if necessary."},
})
}

6
internal/index/index.go
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@ -3,12 +3,14 @@ package index
import (
"context"
"encoding/json"
"fmt"
"io"
"sync"
"time"
"github.com/restic/restic/internal/crypto"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/feature"
"github.com/restic/restic/internal/restic"
"github.com/restic/restic/internal/debug"
@ -515,6 +517,10 @@ func DecodeIndex(buf []byte, id restic.ID) (idx *Index, oldFormat bool, err erro
debug.Log("Error %v", err)
if isErrOldIndex(err) {
if feature.Flag.Enabled(feature.DeprecateLegacyIndex) {
return nil, false, fmt.Errorf("index seems to use the legacy format. update it using `restic repair index`")
}
debug.Log("index is probably old format, trying that")
idx, err = decodeOldIndex(buf)
return idx, err == nil, err

3
internal/index/index_test.go
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@ -8,6 +8,7 @@ import (
"sync"
"testing"
"github.com/restic/restic/internal/feature"
"github.com/restic/restic/internal/index"
"github.com/restic/restic/internal/restic"
rtest "github.com/restic/restic/internal/test"
@ -427,6 +428,8 @@ func BenchmarkEncodeIndex(b *testing.B) {
}
func TestIndexUnserializeOld(t *testing.T) {
defer feature.TestSetFlag(t, feature.Flag, feature.DeprecateLegacyIndex, false)()
idx, oldFormat, err := index.DecodeIndex(docOldExample, restic.NewRandomID())
rtest.OK(t, err)
rtest.Assert(t, oldFormat, "old index format recognized as new format")