mirror of https://github.com/restic/restic.git
77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
package restic
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import (
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"encoding/json"
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"sort"
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"strings"
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"github.com/restic/restic/internal/errors"
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)
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// SnapshotGroupKey is the structure for identifying groups in a grouped
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// snapshot list. This is used by GroupSnapshots()
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type SnapshotGroupKey struct {
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Hostname string `json:"hostname"`
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Paths []string `json:"paths"`
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Tags []string `json:"tags"`
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}
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// GroupSnapshots takes a list of snapshots and a grouping criteria and creates
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// a group list of snapshots.
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func GroupSnapshots(snapshots Snapshots, options string) (map[string]Snapshots, bool, error) {
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// group by hostname and dirs
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snapshotGroups := make(map[string]Snapshots)
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var GroupByTag bool
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var GroupByHost bool
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var GroupByPath bool
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var GroupOptionList []string
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GroupOptionList = strings.Split(options, ",")
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for _, option := range GroupOptionList {
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switch option {
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case "host", "hosts":
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GroupByHost = true
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case "path", "paths":
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GroupByPath = true
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case "tag", "tags":
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GroupByTag = true
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case "":
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default:
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return nil, false, errors.Fatal("unknown grouping option: '" + option + "'")
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}
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}
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for _, sn := range snapshots {
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// Determining grouping-keys
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var tags []string
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var hostname string
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var paths []string
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if GroupByTag {
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tags = sn.Tags
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sort.StringSlice(tags).Sort()
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}
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if GroupByHost {
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hostname = sn.Hostname
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}
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if GroupByPath {
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paths = sn.Paths
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}
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sort.StringSlice(sn.Paths).Sort()
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var k []byte
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var err error
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k, err = json.Marshal(SnapshotGroupKey{Tags: tags, Hostname: hostname, Paths: paths})
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if err != nil {
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return nil, false, err
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}
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snapshotGroups[string(k)] = append(snapshotGroups[string(k)], sn)
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}
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return snapshotGroups, GroupByTag || GroupByHost || GroupByPath, nil
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}
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