37 lines
1.0 KiB
Go
37 lines
1.0 KiB
Go
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package restic
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import (
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"encoding/json"
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"os/exec"
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"github.com/pkg/errors"
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)
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// GetSnapshotID runs a 'restic snapshots' command to get the ID of the snapshot
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// in the specified repo matching the set of provided tags, or an error if a
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// unique snapshot cannot be identified.
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func GetSnapshotID(repoPrefix, repo, passwordFile string, tags map[string]string) (string, error) {
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output, err := GetSnapshotCommand(repoPrefix, repo, passwordFile, tags).Cmd().Output()
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if err != nil {
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if exitErr, ok := err.(*exec.ExitError); ok {
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return "", errors.Wrapf(err, "error running command, stderr=%s", exitErr.Stderr)
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}
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return "", errors.Wrap(err, "error running command")
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}
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type snapshotID struct {
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ShortID string `json:"short_id"`
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}
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var snapshots []snapshotID
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if err := json.Unmarshal(output, &snapshots); err != nil {
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return "", errors.Wrap(err, "error unmarshalling restic snapshots result")
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}
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if len(snapshots) != 1 {
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return "", errors.Errorf("expected one matching snapshot, got %d", len(snapshots))
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}
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return snapshots[0].ShortID, nil
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}
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