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Currently, `restic backup` (if a `--parent` is not provided) will choose the most recent matching snapshot as the parent snapshot. This makes sense in the usual case, where we tag the snapshot-being-created with the current time. However, this doesn't make sense if the user has passed `--time` and is currently creating a snapshot older than the latest snapshot. Instead, choose the most recent snapshot which is not newer than the snapshot-being-created's timestamp, to avoid any time travel. Impetus for this change: I'm using restic for the first time! I have a number of existing BTRFS snapshots I am backing up via restic to serve as my initial set of backups. I initially `restic backup`'d the most recent snapshot to test, then started backing up each of the other snapshots. I noticed in `restic cat snapshot <id>` output that all the remaining snapshots have the most recent as the parent.
48 lines
1.5 KiB
Go
48 lines
1.5 KiB
Go
package restic_test
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import (
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"context"
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"testing"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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)
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func TestFindLatestSnapshot(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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restic.TestCreateSnapshot(t, repo, parseTimeUTC("2015-05-05 05:05:05"), 1, 0)
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restic.TestCreateSnapshot(t, repo, parseTimeUTC("2017-07-07 07:07:07"), 1, 0)
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latestSnapshot := restic.TestCreateSnapshot(t, repo, parseTimeUTC("2019-09-09 09:09:09"), 1, 0)
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id, err := restic.FindLatestSnapshot(context.TODO(), repo, []string{}, []restic.TagList{}, []string{"foo"}, nil)
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if err != nil {
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t.Fatalf("FindLatestSnapshot returned error: %v", err)
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}
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if id != *latestSnapshot.ID() {
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t.Errorf("FindLatestSnapshot returned wrong snapshot ID: %v", id)
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}
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}
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func TestFindLatestSnapshotWithMaxTimestamp(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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restic.TestCreateSnapshot(t, repo, parseTimeUTC("2015-05-05 05:05:05"), 1, 0)
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desiredSnapshot := restic.TestCreateSnapshot(t, repo, parseTimeUTC("2017-07-07 07:07:07"), 1, 0)
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restic.TestCreateSnapshot(t, repo, parseTimeUTC("2019-09-09 09:09:09"), 1, 0)
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maxTimestamp := parseTimeUTC("2018-08-08 08:08:08")
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id, err := restic.FindLatestSnapshot(context.TODO(), repo, []string{}, []restic.TagList{}, []string{"foo"}, &maxTimestamp)
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if err != nil {
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t.Fatalf("FindLatestSnapshot returned error: %v", err)
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}
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if id != *desiredSnapshot.ID() {
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t.Errorf("FindLatestSnapshot returned wrong snapshot ID: %v", id)
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}
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}
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