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@ -20,8 +20,10 @@ import (
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"path/filepath"
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"sort"
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"testing"
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"unsafe"
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"github.com/pkg/errors"
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"github.com/prometheus/prometheus/pkg/textparse"
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"github.com/prometheus/tsdb/chunkenc"
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"github.com/prometheus/tsdb/chunks"
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"github.com/prometheus/tsdb/labels"
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@ -380,3 +382,41 @@ func TestPersistence_index_e2e(t *testing.T) {
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testutil.Ok(t, ir.Close())
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}
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func readPrometheusLabels(fn string, n int) ([]labels.Labels, error) {
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f, err := os.Open(fn)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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b, err := ioutil.ReadAll(f)
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if err != nil {
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return nil, err
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}
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p := textparse.New(b)
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i := 0
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var mets []labels.Labels
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hashes := map[uint64]struct{}{}
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for p.Next() && i < n {
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m := make(labels.Labels, 0, 10)
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p.Metric((*promlabels.Labels)(unsafe.Pointer(&m)))
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h := m.Hash()
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if _, ok := hashes[h]; ok {
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continue
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}
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mets = append(mets, m)
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hashes[h] = struct{}{}
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i++
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}
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if err := p.Err(); err != nil {
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return nil, err
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}
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if i != n {
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return mets, errors.Errorf("requested %d metrics but found %d", n, i)
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}
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return mets, nil
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}
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