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restorer: minor code cleanups

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This commit is contained in:
Michael Eischer 2024-07-20 12:32:08 +02:00
parent 5d6ce59a8d
commit 6f8e17a463
1 changed files with 13 additions and 16 deletions
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29
internal/restorer/filerestorer.go
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@ -93,17 +93,20 @@ func (r *fileRestorer) targetPath(location string) string {
return filepath.Join(r.dst, location)
}
func (r *fileRestorer) forEachBlob(blobIDs []restic.ID, fn func(packID restic.ID, packBlob restic.Blob, idx int)) error {
func (r *fileRestorer) forEachBlob(blobIDs []restic.ID, fn func(packID restic.ID, packBlob restic.Blob, idx int, fileOffset int64)) error {
if len(blobIDs) == 0 {
return nil
}
fileOffset := int64(0)
for i, blobID := range blobIDs {
packs := r.idx(restic.DataBlob, blobID)
if len(packs) == 0 {
return errors.Errorf("Unknown blob %s", blobID.String())
}
fn(packs[0].PackID, packs[0].Blob, i)
pb := packs[0]
fn(pb.PackID, pb.Blob, i, fileOffset)
fileOffset += int64(pb.DataLength())
}
return nil
@ -124,10 +127,10 @@ func (r *fileRestorer) restoreFiles(ctx context.Context) error {
var packsMap map[restic.ID][]fileBlobInfo
if largeFile {
packsMap = make(map[restic.ID][]fileBlobInfo)
file.blobs = packsMap
}
fileOffset := int64(0)
restoredBlobs := false
err := r.forEachBlob(fileBlobs, func(packID restic.ID, blob restic.Blob, idx int) {
err := r.forEachBlob(fileBlobs, func(packID restic.ID, blob restic.Blob, idx int, fileOffset int64) {
if !file.state.HasMatchingBlob(idx) {
if largeFile {
packsMap[packID] = append(packsMap[packID], fileBlobInfo{id: blob.ID, offset: fileOffset})
@ -136,7 +139,6 @@ func (r *fileRestorer) restoreFiles(ctx context.Context) error {
} else {
r.reportBlobProgress(file, uint64(blob.DataLength()))
}
fileOffset += int64(blob.DataLength())
pack, ok := packs[packID]
if !ok {
pack = &packInfo{
@ -151,6 +153,11 @@ func (r *fileRestorer) restoreFiles(ctx context.Context) error {
file.sparse = r.sparse
}
})
if err != nil {
// repository index is messed up, can't do anything
return err
}
if len(fileBlobs) == 1 {
// no need to preallocate files with a single block, thus we can always consider them to be sparse
// in addition, a short chunk will never match r.zeroChunk which would prevent sparseness for short files
@ -163,14 +170,6 @@ func (r *fileRestorer) restoreFiles(ctx context.Context) error {
file.sparse = false
}
if err != nil {
// repository index is messed up, can't do anything
return err
}
if largeFile {
file.blobs = packsMap
}
// empty file or one with already uptodate content. Make sure that the file size is correct
if !restoredBlobs {
err := r.truncateFileToSize(file.location, file.size)
@ -249,12 +248,10 @@ func (r *fileRestorer) downloadPack(ctx context.Context, pack *packInfo) error {
blobInfo.files[file] = append(blobInfo.files[file], fileOffset)
}
if fileBlobs, ok := file.blobs.(restic.IDs); ok {
fileOffset := int64(0)
err := r.forEachBlob(fileBlobs, func(packID restic.ID, blob restic.Blob, idx int) {
err := r.forEachBlob(fileBlobs, func(packID restic.ID, blob restic.Blob, idx int, fileOffset int64) {
if packID.Equal(pack.id) && !file.state.HasMatchingBlob(idx) {
addBlob(blob, fileOffset)
}
fileOffset += int64(blob.DataLength())
})
if err != nil {
// restoreFiles should have caught this error before