forked from TrueCloudLab/restic
84 lines
2 KiB
Go
84 lines
2 KiB
Go
package dryrun
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import (
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"context"
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"hash"
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"io"
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"github.com/restic/restic/internal/backend"
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"github.com/restic/restic/internal/debug"
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)
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// Backend passes reads through to an underlying layer and accepts writes, but
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// doesn't do anything. Also removes are ignored.
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// So in fact, this backend silently ignores all operations that would modify
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// the repo and does normal operations else.
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// This is used for `backup --dry-run`.
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type Backend struct {
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b backend.Backend
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}
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// statically ensure that Backend implements backend.Backend.
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var _ backend.Backend = &Backend{}
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func New(be backend.Backend) *Backend {
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b := &Backend{b: be}
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debug.Log("created new dry backend")
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return b
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}
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// Save adds new Data to the backend.
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func (be *Backend) Save(_ context.Context, h backend.Handle, _ backend.RewindReader) error {
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if err := h.Valid(); err != nil {
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return err
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}
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// don't save anything, just return ok
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return nil
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}
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// Remove deletes a file from the backend.
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func (be *Backend) Remove(_ context.Context, _ backend.Handle) error {
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return nil
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}
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func (be *Backend) Connections() uint {
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return be.b.Connections()
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}
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// Delete removes all data in the backend.
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func (be *Backend) Delete(_ context.Context) error {
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return nil
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}
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func (be *Backend) Close() error {
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return be.b.Close()
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}
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func (be *Backend) Hasher() hash.Hash {
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return be.b.Hasher()
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}
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func (be *Backend) HasAtomicReplace() bool {
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return be.b.HasAtomicReplace()
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}
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func (be *Backend) IsNotExist(err error) bool {
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return be.b.IsNotExist(err)
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}
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func (be *Backend) IsPermanentError(err error) bool {
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return be.b.IsPermanentError(err)
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}
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func (be *Backend) List(ctx context.Context, t backend.FileType, fn func(backend.FileInfo) error) error {
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return be.b.List(ctx, t, fn)
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}
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func (be *Backend) Load(ctx context.Context, h backend.Handle, length int, offset int64, fn func(io.Reader) error) error {
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return be.b.Load(ctx, h, length, offset, fn)
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}
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func (be *Backend) Stat(ctx context.Context, h backend.Handle) (backend.FileInfo, error) {
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return be.b.Stat(ctx, h)
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}
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