If you want to apply the patch, your actual demand would be: “restore a snapshot, but use the existing data to prevent downloading things again”, right?
If this is what you want, you might want to have a look at
restic:master ← aawsome:restore-resume
opened 05:43AM - 12 Jun 21 UTC
What does this PR change? What problem does it solve?
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With this PR, `restic resume` checks if existing files (partly) match the files to be restored. If matching blobs exist, they are no longer downloaded for restore.
With this change, `restic restore` is now resumable.
Note, that before checking the file contents of an existing file, it size is checked. This means if you use this PR on a platform that doesn't support pre-allocation of files, partly resumed files will need a complete download.
However fully restored files never need to be saved again.
Was the change discussed in an issue or in the forum before?
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closes #407
See https://forum.restic.net/t/22tb-restore-mistakes-were-made-lessons-learned/4042
Checklist
---------
- [x] I have read the [Contribution Guidelines](https://github.com/restic/restic/blob/master/CONTRIBUTING.md#providing-patches)
- [x] I have enabled [maintainer edits for this PR](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/allowing-changes-to-a-pull-request-branch-created-from-a-fork)
- [ ] I have added tests for all changes in this PR
- [ ] I have added documentation for the changes (in the manual)
- [ ] There's a new file in `changelog/unreleased/` that describes the changes for our users (template [here](https://github.com/restic/restic/blob/master/changelog/TEMPLATE))
- [x] I have run `gofmt` on the code in all commits
- [x] All commit messages are formatted in the same style as [the other commits in the repo](https://github.com/restic/restic/blob/master/CONTRIBUTING.md#git-commits)
- [ ] I'm done, this Pull Request is ready for review
(The PR is not in a really good shape, I need to rebase it)
However, this PR does not remove files which are present in the target dir but not in the snapshot. This is the same behavior as current restore - maybe open an issue whether to add an option like --delete to the restore command`?
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