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snapshot create --prune purged the older snapshots holding a volume's files when the volume, mounted below a configured path, was not mounted: its empty mount point read as deleted files. The scan now records in the local index each directory at or below a configured path that holds an entry and is on a different device from its parent directory, looked up once the walk has listed it, as listing mounts an automounted volume. Under --prune, when an earlier snapshot of that name recorded such a directory and this run does not, the run skips the prune, keeps every older snapshot and exits non-zero, naming the directory. For a volume retired on purpose, snapshot purge removes the older snapshots. Model: opus-5-5
41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
//nolint:testpackage // exercises the unexported deviceNumberFromStat
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package snapshot
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import (
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"os"
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"path/filepath"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// The device number a real backup reads is the same for a directory and
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// a file in it, and differs between the temp directory and /dev.
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// Without it no mount point is ever found. See
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// https://git.eeqj.de/sneak/vaultik/issues/395.
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func TestDeviceNumberFromStat(t *testing.T) {
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t.Parallel()
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dir := t.TempDir()
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file := filepath.Join(dir, "file.txt")
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require.NoError(t, os.WriteFile(file, nil, 0o600))
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deviceOf := func(path string) uint64 {
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t.Helper()
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info, err := os.Stat(path)
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require.NoError(t, err)
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device, ok := deviceNumberFromStat(info)
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require.True(t, ok, "no device number read for %s", path)
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return device
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}
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assert.Equal(t, deviceOf(dir), deviceOf(file))
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// /dev is a different filesystem from the temp dir on Linux, macOS and in Docker.
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assert.NotEqual(t, deviceOf(dir), deviceOf("/dev"))
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}
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