127 lines
2.9 KiB
Go
127 lines
2.9 KiB
Go
package operations
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import (
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"archive/tar"
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"context"
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"github.com/pojntfx/stfs/internal/converters"
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models "github.com/pojntfx/stfs/internal/db/sqlite/models/metadata"
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"github.com/pojntfx/stfs/internal/encryption"
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"github.com/pojntfx/stfs/internal/formatting"
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"github.com/pojntfx/stfs/internal/pax"
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"github.com/pojntfx/stfs/internal/persisters"
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"github.com/pojntfx/stfs/internal/signature"
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"github.com/pojntfx/stfs/internal/tape"
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"github.com/pojntfx/stfs/pkg/config"
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"github.com/pojntfx/stfs/pkg/recovery"
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)
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func Delete(
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state config.StateConfig,
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pipes config.PipeConfig,
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crypto config.CryptoConfig,
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recordSize int,
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name string,
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) error {
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dirty := false
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tw, isRegular, cleanup, err := tape.OpenTapeWriteOnly(state.Drive, recordSize, false)
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if err != nil {
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return err
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}
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defer cleanup(&dirty)
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metadataPersister := persisters.NewMetadataPersister(state.Metadata)
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if err := metadataPersister.Open(); err != nil {
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return err
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}
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lastIndexedRecord, lastIndexedBlock, err := metadataPersister.GetLastIndexedRecordAndBlock(context.Background(), recordSize)
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if err != nil {
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return err
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}
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headersToDelete := []*models.Header{}
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dbhdr, err := metadataPersister.GetHeader(context.Background(), name)
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if err != nil {
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return err
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}
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headersToDelete = append(headersToDelete, dbhdr)
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// If the header refers to a directory, get it's children
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if dbhdr.Typeflag == tar.TypeDir {
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dbhdrs, err := metadataPersister.GetHeaderChildren(context.Background(), name)
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if err != nil {
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return err
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}
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headersToDelete = append(headersToDelete, dbhdrs...)
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}
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if err := formatting.PrintCSV(formatting.TARHeaderCSV); err != nil {
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return err
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}
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// Append deletion hdrs to the tape or tar file
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hdrs := []*tar.Header{}
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for _, dbhdr := range headersToDelete {
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hdr, err := converters.DBHeaderToTarHeader(dbhdr)
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if err != nil {
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return err
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}
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hdr.Size = 0 // Don't try to seek after the record
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hdr.PAXRecords[pax.STFSRecordVersion] = pax.STFSRecordVersion1
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hdr.PAXRecords[pax.STFSRecordAction] = pax.STFSRecordActionDelete
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if err := signature.SignHeader(hdr, isRegular, pipes.Signature, crypto.Identity); err != nil {
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return err
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}
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if err := encryption.EncryptHeader(hdr, pipes.Encryption, crypto.Recipient); err != nil {
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return err
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}
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if err := tw.WriteHeader(hdr); err != nil {
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return err
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}
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dirty = true
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if err := formatting.PrintCSV(formatting.GetTARHeaderAsCSV(-1, -1, -1, -1, hdr)); err != nil {
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return err
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}
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hdrs = append(hdrs, hdr)
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}
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return recovery.Index(
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state,
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pipes,
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crypto,
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recordSize,
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int(lastIndexedRecord),
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int(lastIndexedBlock),
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false,
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func(hdr *tar.Header, i int) error {
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// Ignore the first header, which is the last header which we already indexed
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if i == 0 {
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return nil
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}
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if len(hdrs) <= i-1 {
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return config.ErrMissingTarHeader
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}
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*hdr = *hdrs[i-1]
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return nil
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},
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func(hdr *tar.Header, isRegular bool) error {
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return nil // We sign above, no need to verify
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},
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)
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}
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