Move metric type definitions to common/model

They are used in multiple repos, so common is a better place for them.
Several packages now don't depend on `model/textparse`, e.g.
`storage/remote`.

Also remove `metadata` struct from `api.go`, since it was identical to
a struct in the `metadata` package.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

go.mod

@@ -48,7 +48,7 @@ require (
 	github.com/prometheus/alertmanager v0.26.0
 	github.com/prometheus/client_golang v1.17.0
 	github.com/prometheus/client_model v0.5.0
-	github.com/prometheus/common v0.45.0
+	github.com/prometheus/common v0.45.1-0.20231122191551-832cd6e99f99
 	github.com/prometheus/common/assets v0.2.0
 	github.com/prometheus/common/sigv4 v0.1.0
 	github.com/prometheus/exporter-toolkit v0.10.0

go.sum

@@ -653,8 +653,8 @@ github.com/prometheus/common v0.9.1/go.mod h1:yhUN8i9wzaXS3w1O07YhxHEBxD+W35wd8b
 github.com/prometheus/common v0.10.0/go.mod h1:Tlit/dnDKsSWFlCLTWaA1cyBgKHSMdTB80sz/V91rCo=
 github.com/prometheus/common v0.26.0/go.mod h1:M7rCNAaPfAosfx8veZJCuw84e35h3Cfd9VFqTh1DIvc=
 github.com/prometheus/common v0.29.0/go.mod h1:vu+V0TpY+O6vW9J44gczi3Ap/oXXR10b+M/gUGO4Hls=
-github.com/prometheus/common v0.45.0 h1:2BGz0eBc2hdMDLnO/8n0jeB3oPrt2D08CekT0lneoxM=
+github.com/prometheus/common v0.45.1-0.20231122191551-832cd6e99f99 h1:V5ajRiLiCQGO+ggTr+07gMUcTqlIMMkDBfrJe5zKLmc=
-github.com/prometheus/common v0.45.0/go.mod h1:YJmSTw9BoKxJplESWWxlbyttQR4uaEcGyv9MZjVOJsY=
+github.com/prometheus/common v0.45.1-0.20231122191551-832cd6e99f99/go.mod h1:YJmSTw9BoKxJplESWWxlbyttQR4uaEcGyv9MZjVOJsY=
 github.com/prometheus/common/assets v0.2.0 h1:0P5OrzoHrYBOSM1OigWL3mY8ZvV2N4zIE/5AahrSrfM=
 github.com/prometheus/common/assets v0.2.0/go.mod h1:D17UVUE12bHbim7HzwUvtqm6gwBEaDQ0F+hIGbFbccI=
 github.com/prometheus/common/sigv4 v0.1.0 h1:qoVebwtwwEhS85Czm2dSROY5fTo2PAPEVdDeppTwGX4=

model/metadata/metadata.go

@@ -13,11 +13,11 @@
 
 package metadata
 
-import "github.com/prometheus/prometheus/model/textparse"
+import "github.com/prometheus/common/model"
 
 // Metadata stores a series' metadata information.
 type Metadata struct {
-	Type textparse.MetricType
+	Type model.MetricType
 	Unit string
 	Help string
 }

model/textparse/interface.go

@@ -16,6 +16,8 @@ package textparse
 import (
 	"mime"
 
+	"github.com/prometheus/common/model"
+
 	"github.com/prometheus/prometheus/model/exemplar"
 	"github.com/prometheus/prometheus/model/histogram"
 	"github.com/prometheus/prometheus/model/labels"
@@ -110,16 +112,4 @@ const (
 	EntryHistogram Entry = 5 // A series with a native histogram as a value.
 )
 
-// MetricType represents metric type values.
+type MetricType = model.MetricType
-type MetricType string
-
-const (
-	MetricTypeCounter        = MetricType("counter")
-	MetricTypeGauge          = MetricType("gauge")
-	MetricTypeHistogram      = MetricType("histogram")
-	MetricTypeGaugeHistogram = MetricType("gaugehistogram")
-	MetricTypeSummary        = MetricType("summary")
-	MetricTypeInfo           = MetricType("info")
-	MetricTypeStateset       = MetricType("stateset")
-	MetricTypeUnknown        = MetricType("unknown")
-)

model/textparse/openmetricsparse.go

@@ -24,6 +24,8 @@ import (
 	"strings"
 	"unicode/utf8"
 
+	"github.com/prometheus/common/model"
+
 	"github.com/prometheus/prometheus/model/exemplar"
 	"github.com/prometheus/prometheus/model/histogram"
 	"github.com/prometheus/prometheus/model/labels"
@@ -74,7 +76,7 @@ type OpenMetricsParser struct {
 	builder labels.ScratchBuilder
 	series  []byte
 	text    []byte
-	mtype   MetricType
+	mtype   model.MetricType
 	val     float64
 	ts      int64
 	hasTS   bool
@@ -272,21 +274,21 @@ func (p *OpenMetricsParser) Next() (Entry, error) {
 		case tType:
 			switch s := yoloString(p.text); s {
 			case "counter":
-				p.mtype = MetricTypeCounter
+				p.mtype = model.MetricTypeCounter
 			case "gauge":
-				p.mtype = MetricTypeGauge
+				p.mtype = model.MetricTypeGauge
 			case "histogram":
-				p.mtype = MetricTypeHistogram
+				p.mtype = model.MetricTypeHistogram
 			case "gaugehistogram":
-				p.mtype = MetricTypeGaugeHistogram
+				p.mtype = model.MetricTypeGaugeHistogram
 			case "summary":
-				p.mtype = MetricTypeSummary
+				p.mtype = model.MetricTypeSummary
 			case "info":
-				p.mtype = MetricTypeInfo
+				p.mtype = model.MetricTypeInfo
 			case "stateset":
-				p.mtype = MetricTypeStateset
+				p.mtype = model.MetricTypeStateset
 			case "unknown":
-				p.mtype = MetricTypeUnknown
+				p.mtype = model.MetricTypeUnknown
 			default:
 				return EntryInvalid, fmt.Errorf("invalid metric type %q", s)
 			}

model/textparse/openmetricsparse_test.go

@@ -18,6 +18,7 @@ import (
 	"io"
 	"testing"
 
+	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
 
 	"github.com/prometheus/prometheus/model/exemplar"
@@ -77,7 +78,7 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 		m       string
 		t       *int64
 		v       float64
-		typ     MetricType
+		typ     model.MetricType
 		help    string
 		unit    string
 		comment string
@@ -88,7 +89,7 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			help: "A summary of the GC invocation durations.",
 		}, {
 			m:   "go_gc_duration_seconds",
-			typ: MetricTypeSummary,
+			typ: model.MetricTypeSummary,
 		}, {
 			m:    "go_gc_duration_seconds",
 			unit: "seconds",
@@ -130,7 +131,7 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			help: "Number of goroutines that currently exist.",
 		}, {
 			m:   "go_goroutines",
-			typ: MetricTypeGauge,
+			typ: model.MetricTypeGauge,
 		}, {
 			m:    `go_goroutines`,
 			v:    33,
@@ -138,21 +139,21 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			lset: labels.FromStrings("__name__", "go_goroutines"),
 		}, {
 			m:   "hh",
-			typ: MetricTypeHistogram,
+			typ: model.MetricTypeHistogram,
 		}, {
 			m:    `hh_bucket{le="+Inf"}`,
 			v:    1,
 			lset: labels.FromStrings("__name__", "hh_bucket", "le", "+Inf"),
 		}, {
 			m:   "gh",
-			typ: MetricTypeGaugeHistogram,
+			typ: model.MetricTypeGaugeHistogram,
 		}, {
 			m:    `gh_bucket{le="+Inf"}`,
 			v:    1,
 			lset: labels.FromStrings("__name__", "gh_bucket", "le", "+Inf"),
 		}, {
 			m:   "hhh",
-			typ: MetricTypeHistogram,
+			typ: model.MetricTypeHistogram,
 		}, {
 			m:    `hhh_bucket{le="+Inf"}`,
 			v:    1,
@@ -165,7 +166,7 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			e:    &exemplar.Exemplar{Labels: labels.FromStrings("id", "histogram-count-test"), Value: 4},
 		}, {
 			m:   "ggh",
-			typ: MetricTypeGaugeHistogram,
+			typ: model.MetricTypeGaugeHistogram,
 		}, {
 			m:    `ggh_bucket{le="+Inf"}`,
 			v:    1,
@@ -178,7 +179,7 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			e:    &exemplar.Exemplar{Labels: labels.FromStrings("id", "gaugehistogram-count-test", "xx", "yy"), Value: 4, HasTs: true, Ts: 123123},
 		}, {
 			m:   "smr_seconds",
-			typ: MetricTypeSummary,
+			typ: model.MetricTypeSummary,
 		}, {
 			m:    `smr_seconds_count`,
 			v:    2,
@@ -191,14 +192,14 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			e:    &exemplar.Exemplar{Labels: labels.FromStrings("id", "summary-sum-test"), Value: 1, HasTs: true, Ts: 123321},
 		}, {
 			m:   "ii",
-			typ: MetricTypeInfo,
+			typ: model.MetricTypeInfo,
 		}, {
 			m:    `ii{foo="bar"}`,
 			v:    1,
 			lset: labels.FromStrings("__name__", "ii", "foo", "bar"),
 		}, {
 			m:   "ss",
-			typ: MetricTypeStateset,
+			typ: model.MetricTypeStateset,
 		}, {
 			m:    `ss{ss="foo"}`,
 			v:    1,
@@ -213,7 +214,7 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			lset: labels.FromStrings("A", "a", "__name__", "ss"),
 		}, {
 			m:   "un",
-			typ: MetricTypeUnknown,
+			typ: model.MetricTypeUnknown,
 		}, {
 			m:    "_metric_starting_with_underscore",
 			v:    1,
@@ -228,7 +229,7 @@ foo_total 17.0 1520879607.789 # {id="counter-test"} 5`
 			lset: labels.FromStrings("__name__", "testmetric", "label", `"bar"`),
 		}, {
 			m:   "foo",
-			typ: MetricTypeCounter,
+			typ: model.MetricTypeCounter,
 		}, {
 			m:    "foo_total",
 			v:    17,

model/textparse/promparse.go

@@ -26,6 +26,8 @@ import (
 	"unicode/utf8"
 	"unsafe"
 
+	"github.com/prometheus/common/model"
+
 	"github.com/prometheus/prometheus/model/exemplar"
 	"github.com/prometheus/prometheus/model/histogram"
 	"github.com/prometheus/prometheus/model/labels"
@@ -305,15 +307,15 @@ func (p *PromParser) Next() (Entry, error) {
 		case tType:
 			switch s := yoloString(p.text); s {
 			case "counter":
-				p.mtype = MetricTypeCounter
+				p.mtype = model.MetricTypeCounter
 			case "gauge":
-				p.mtype = MetricTypeGauge
+				p.mtype = model.MetricTypeGauge
 			case "histogram":
-				p.mtype = MetricTypeHistogram
+				p.mtype = model.MetricTypeHistogram
 			case "summary":
-				p.mtype = MetricTypeSummary
+				p.mtype = model.MetricTypeSummary
 			case "untyped":
-				p.mtype = MetricTypeUnknown
+				p.mtype = model.MetricTypeUnknown
 			default:
 				return EntryInvalid, fmt.Errorf("invalid metric type %q", s)
 			}

model/textparse/promparse_test.go

@@ -65,7 +65,7 @@ testmetric{label="\"bar\""} 1`
 		m       string
 		t       *int64
 		v       float64
-		typ     MetricType
+		typ     model.MetricType
 		help    string
 		comment string
 	}{
@@ -74,7 +74,7 @@ testmetric{label="\"bar\""} 1`
 			help: "A summary of the GC invocation durations.",
 		}, {
 			m:   "go_gc_duration_seconds",
-			typ: MetricTypeSummary,
+			typ: model.MetricTypeSummary,
 		}, {
 			m:    `go_gc_duration_seconds{quantile="0"}`,
 			v:    4.9351e-05,
@@ -142,7 +142,7 @@ testmetric{label="\"bar\""} 1`
 			help: "Number of goroutines that currently exist.",
 		}, {
 			m:   "go_goroutines",
-			typ: MetricTypeGauge,
+			typ: model.MetricTypeGauge,
 		}, {
 			m:    `go_goroutines`,
 			v:    33,

model/textparse/protobufparse.go

@@ -252,21 +252,21 @@ func (p *ProtobufParser) Help() ([]byte, []byte) {
 // Type returns the metric name and type in the current entry.
 // Must only be called after Next returned a type entry.
 // The returned byte slices become invalid after the next call to Next.
-func (p *ProtobufParser) Type() ([]byte, MetricType) {
+func (p *ProtobufParser) Type() ([]byte, model.MetricType) {
 	n := p.metricBytes.Bytes()
 	switch p.mf.GetType() {
 	case dto.MetricType_COUNTER:
-		return n, MetricTypeCounter
+		return n, model.MetricTypeCounter
 	case dto.MetricType_GAUGE:
-		return n, MetricTypeGauge
+		return n, model.MetricTypeGauge
 	case dto.MetricType_HISTOGRAM:
-		return n, MetricTypeHistogram
+		return n, model.MetricTypeHistogram
 	case dto.MetricType_GAUGE_HISTOGRAM:
-		return n, MetricTypeGaugeHistogram
+		return n, model.MetricTypeGaugeHistogram
 	case dto.MetricType_SUMMARY:
-		return n, MetricTypeSummary
+		return n, model.MetricTypeSummary
 	}
-	return n, MetricTypeUnknown
+	return n, model.MetricTypeUnknown
 }
 
 // Unit always returns (nil, nil) because units aren't supported by the protobuf

model/textparse/protobufparse_test.go

@@ -21,6 +21,7 @@ import (
 	"testing"
 
 	"github.com/gogo/protobuf/proto"
+	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
 
 	"github.com/prometheus/prometheus/model/exemplar"
@@ -649,7 +650,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "go_build_info",
-					typ: MetricTypeGauge,
+					typ: model.MetricTypeGauge,
 				},
 				{
 					m: "go_build_info\xFFchecksum\xFF\xFFpath\xFFgithub.com/prometheus/client_golang\xFFversion\xFF(devel)",
@@ -667,7 +668,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "go_memstats_alloc_bytes_total",
-					typ: MetricTypeCounter,
+					typ: model.MetricTypeCounter,
 				},
 				{
 					m: "go_memstats_alloc_bytes_total",
@@ -685,7 +686,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "something_untyped",
-					typ: MetricTypeUnknown,
+					typ: model.MetricTypeUnknown,
 				},
 				{
 					m: "something_untyped",
@@ -701,7 +702,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_histogram",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{
 					m: "test_histogram",
@@ -736,7 +737,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_gauge_histogram",
-					typ: MetricTypeGaugeHistogram,
+					typ: model.MetricTypeGaugeHistogram,
 				},
 				{
 					m: "test_gauge_histogram",
@@ -772,7 +773,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_float_histogram",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{
 					m: "test_float_histogram",
@@ -807,7 +808,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_gauge_float_histogram",
-					typ: MetricTypeGaugeHistogram,
+					typ: model.MetricTypeGaugeHistogram,
 				},
 				{
 					m: "test_gauge_float_histogram",
@@ -843,7 +844,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_histogram2",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{
 					m: "test_histogram2_count",
@@ -903,7 +904,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_histogram_family",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{
 					m: "test_histogram_family\xfffoo\xffbar",
@@ -947,7 +948,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_float_histogram_with_zerothreshold_zero",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{
 					m: "test_float_histogram_with_zerothreshold_zero",
@@ -971,7 +972,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "rpc_durations_seconds",
-					typ: MetricTypeSummary,
+					typ: model.MetricTypeSummary,
 				},
 				{
 					m: "rpc_durations_seconds_count\xffservice\xffexponential",
@@ -1022,7 +1023,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "without_quantiles",
-					typ: MetricTypeSummary,
+					typ: model.MetricTypeSummary,
 				},
 				{
 					m: "without_quantiles_count",
@@ -1044,7 +1045,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "empty_histogram",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{
 					m: "empty_histogram",
@@ -1063,7 +1064,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_counter_with_createdtimestamp",
-					typ: MetricTypeCounter,
+					typ: model.MetricTypeCounter,
 				},
 				{
 					m:  "test_counter_with_createdtimestamp",
@@ -1079,7 +1080,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_summary_with_createdtimestamp",
-					typ: MetricTypeSummary,
+					typ: model.MetricTypeSummary,
 				},
 				{
 					m:  "test_summary_with_createdtimestamp_count",
@@ -1103,7 +1104,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_histogram_with_createdtimestamp",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{
 					m:  "test_histogram_with_createdtimestamp",
@@ -1123,7 +1124,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{
 					m:   "test_gaugehistogram_with_createdtimestamp",
-					typ: MetricTypeGaugeHistogram,
+					typ: model.MetricTypeGaugeHistogram,
 				},
 				{
 					m:  "test_gaugehistogram_with_createdtimestamp",
@@ -1149,7 +1150,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 1
 					m:   "go_build_info",
-					typ: MetricTypeGauge,
+					typ: model.MetricTypeGauge,
 				},
 				{ // 2
 					m: "go_build_info\xFFchecksum\xFF\xFFpath\xFFgithub.com/prometheus/client_golang\xFFversion\xFF(devel)",
@@ -1167,7 +1168,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 4
 					m:   "go_memstats_alloc_bytes_total",
-					typ: MetricTypeCounter,
+					typ: model.MetricTypeCounter,
 				},
 				{ // 5
 					m: "go_memstats_alloc_bytes_total",
@@ -1185,7 +1186,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 7
 					m:   "something_untyped",
-					typ: MetricTypeUnknown,
+					typ: model.MetricTypeUnknown,
 				},
 				{ // 8
 					m: "something_untyped",
@@ -1201,7 +1202,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 10
 					m:   "test_histogram",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{ // 11
 					m: "test_histogram",
@@ -1294,7 +1295,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 19
 					m:   "test_gauge_histogram",
-					typ: MetricTypeGaugeHistogram,
+					typ: model.MetricTypeGaugeHistogram,
 				},
 				{ // 20
 					m: "test_gauge_histogram",
@@ -1388,7 +1389,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 28
 					m:   "test_float_histogram",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{ // 29
 					m: "test_float_histogram",
@@ -1481,7 +1482,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 37
 					m:   "test_gauge_float_histogram",
-					typ: MetricTypeGaugeHistogram,
+					typ: model.MetricTypeGaugeHistogram,
 				},
 				{ // 38
 					m: "test_gauge_float_histogram",
@@ -1575,7 +1576,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 46
 					m:   "test_histogram2",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{ // 47
 					m: "test_histogram2_count",
@@ -1635,7 +1636,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 54
 					m:   "test_histogram_family",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{ // 55
 					m: "test_histogram_family\xfffoo\xffbar",
@@ -1765,7 +1766,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 68
 					m:   "test_float_histogram_with_zerothreshold_zero",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{ // 69
 					m: "test_float_histogram_with_zerothreshold_zero",
@@ -1789,7 +1790,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 71
 					m:   "rpc_durations_seconds",
-					typ: MetricTypeSummary,
+					typ: model.MetricTypeSummary,
 				},
 				{ // 72
 					m: "rpc_durations_seconds_count\xffservice\xffexponential",
@@ -1840,7 +1841,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 78
 					m:   "without_quantiles",
-					typ: MetricTypeSummary,
+					typ: model.MetricTypeSummary,
 				},
 				{ // 79
 					m: "without_quantiles_count",
@@ -1862,7 +1863,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 79
 					m:   "empty_histogram",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{ // 80
 					m: "empty_histogram",
@@ -1881,7 +1882,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 82
 					m:   "test_counter_with_createdtimestamp",
-					typ: MetricTypeCounter,
+					typ: model.MetricTypeCounter,
 				},
 				{ // 83
 					m:  "test_counter_with_createdtimestamp",
@@ -1897,7 +1898,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 85
 					m:   "test_summary_with_createdtimestamp",
-					typ: MetricTypeSummary,
+					typ: model.MetricTypeSummary,
 				},
 				{ // 86
 					m:  "test_summary_with_createdtimestamp_count",
@@ -1921,7 +1922,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 89
 					m:   "test_histogram_with_createdtimestamp",
-					typ: MetricTypeHistogram,
+					typ: model.MetricTypeHistogram,
 				},
 				{ // 90
 					m:  "test_histogram_with_createdtimestamp",
@@ -1941,7 +1942,7 @@ func TestProtobufParse(t *testing.T) {
 				},
 				{ // 92
 					m:   "test_gaugehistogram_with_createdtimestamp",
-					typ: MetricTypeGaugeHistogram,
+					typ: model.MetricTypeGaugeHistogram,
 				},
 				{ // 93
 					m:  "test_gaugehistogram_with_createdtimestamp",

scrape/scrape.go

@@ -966,7 +966,7 @@ func (c *scrapeCache) setType(metric []byte, t textparse.MetricType) {
 
 	e, ok := c.metadata[string(metric)]
 	if !ok {
-		e = &metaEntry{Metadata: metadata.Metadata{Type: textparse.MetricTypeUnknown}}
+		e = &metaEntry{Metadata: metadata.Metadata{Type: model.MetricTypeUnknown}}
 		c.metadata[string(metric)] = e
 	}
 	if e.Type != t {
@@ -983,7 +983,7 @@ func (c *scrapeCache) setHelp(metric, help []byte) {
 
 	e, ok := c.metadata[string(metric)]
 	if !ok {
-		e = &metaEntry{Metadata: metadata.Metadata{Type: textparse.MetricTypeUnknown}}
+		e = &metaEntry{Metadata: metadata.Metadata{Type: model.MetricTypeUnknown}}
 		c.metadata[string(metric)] = e
 	}
 	if e.Help != string(help) {
@@ -1000,7 +1000,7 @@ func (c *scrapeCache) setUnit(metric, unit []byte) {
 
 	e, ok := c.metadata[string(metric)]
 	if !ok {
-		e = &metaEntry{Metadata: metadata.Metadata{Type: textparse.MetricTypeUnknown}}
+		e = &metaEntry{Metadata: metadata.Metadata{Type: model.MetricTypeUnknown}}
 		c.metadata[string(metric)] = e
 	}
 	if e.Unit != string(unit) {

scrape/scrape_test.go

@@ -971,19 +971,19 @@ test_metric 1
 
 	md, ok := cache.GetMetadata("test_metric")
 	require.True(t, ok, "expected metadata to be present")
-	require.Equal(t, textparse.MetricTypeCounter, md.Type, "unexpected metric type")
+	require.Equal(t, model.MetricTypeCounter, md.Type, "unexpected metric type")
 	require.Equal(t, "some help text", md.Help)
 	require.Equal(t, "metric", md.Unit)
 
 	md, ok = cache.GetMetadata("test_metric_no_help")
 	require.True(t, ok, "expected metadata to be present")
-	require.Equal(t, textparse.MetricTypeGauge, md.Type, "unexpected metric type")
+	require.Equal(t, model.MetricTypeGauge, md.Type, "unexpected metric type")
 	require.Equal(t, "", md.Help)
 	require.Equal(t, "", md.Unit)
 
 	md, ok = cache.GetMetadata("test_metric_no_type")
 	require.True(t, ok, "expected metadata to be present")
-	require.Equal(t, textparse.MetricTypeUnknown, md.Type, "unexpected metric type")
+	require.Equal(t, model.MetricTypeUnknown, md.Type, "unexpected metric type")
 	require.Equal(t, "other help text", md.Help)
 	require.Equal(t, "", md.Unit)
 }

storage/remote/codec.go

@@ -33,7 +33,6 @@ import (
 	"github.com/prometheus/prometheus/model/exemplar"
 	"github.com/prometheus/prometheus/model/histogram"
 	"github.com/prometheus/prometheus/model/labels"
-	"github.com/prometheus/prometheus/model/textparse"
 	"github.com/prometheus/prometheus/prompb"
 	"github.com/prometheus/prometheus/storage"
 	"github.com/prometheus/prometheus/tsdb/chunkenc"
@@ -784,7 +783,7 @@ func labelsToLabelsProto(lbls labels.Labels, buf []prompb.Label) []prompb.Label
 }
 
 // metricTypeToMetricTypeProto transforms a Prometheus metricType into prompb metricType. Since the former is a string we need to transform it to an enum.
-func metricTypeToMetricTypeProto(t textparse.MetricType) prompb.MetricMetadata_MetricType {
+func metricTypeToMetricTypeProto(t model.MetricType) prompb.MetricMetadata_MetricType {
 	mt := strings.ToUpper(string(t))
 	v, ok := prompb.MetricMetadata_MetricType_value[mt]
 	if !ok {

storage/remote/codec_test.go

@@ -20,11 +20,11 @@ import (
 	"testing"
 
 	"github.com/gogo/protobuf/proto"
+	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
 
 	"github.com/prometheus/prometheus/model/histogram"
 	"github.com/prometheus/prometheus/model/labels"
-	"github.com/prometheus/prometheus/model/textparse"
 	"github.com/prometheus/prometheus/prompb"
 	"github.com/prometheus/prometheus/storage"
 	"github.com/prometheus/prometheus/tsdb/chunkenc"
@@ -488,17 +488,17 @@ func TestMergeLabels(t *testing.T) {
 func TestMetricTypeToMetricTypeProto(t *testing.T) {
 	tc := []struct {
 		desc     string
-		input    textparse.MetricType
+		input    model.MetricType
 		expected prompb.MetricMetadata_MetricType
 	}{
 		{
 			desc:     "with a single-word metric",
-			input:    textparse.MetricTypeCounter,
+			input:    model.MetricTypeCounter,
 			expected: prompb.MetricMetadata_COUNTER,
 		},
 		{
 			desc:     "with a two-word metric",
-			input:    textparse.MetricTypeStateset,
+			input:    model.MetricTypeStateset,
 			expected: prompb.MetricMetadata_STATESET,
 		},
 		{

storage/remote/metadata_watcher_test.go

@@ -22,7 +22,6 @@ import (
 	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
 
-	"github.com/prometheus/prometheus/model/textparse"
 	"github.com/prometheus/prometheus/scrape"
 )
 
@@ -108,13 +107,13 @@ func TestWatchScrapeManager_ReadyForCollection(t *testing.T) {
 		Metadata: []scrape.MetricMetadata{
 			{
 				Metric: "prometheus_tsdb_head_chunks_created_total",
-				Type:   textparse.MetricTypeCounter,
+				Type:   model.MetricTypeCounter,
 				Help:   "Total number",
 				Unit:   "",
 			},
 			{
 				Metric: "prometheus_remote_storage_retried_samples_total",
-				Type:   textparse.MetricTypeCounter,
+				Type:   model.MetricTypeCounter,
 				Help:   "Total number",
 				Unit:   "",
 			},
@@ -124,7 +123,7 @@ func TestWatchScrapeManager_ReadyForCollection(t *testing.T) {
 		Metadata: []scrape.MetricMetadata{
 			{
 				Metric: "prometheus_tsdb_head_chunks_created_total",
-				Type:   textparse.MetricTypeCounter,
+				Type:   model.MetricTypeCounter,
 				Help:   "Total number",
 				Unit:   "",
 			},

storage/remote/queue_manager_test.go

@@ -38,7 +38,6 @@ import (
 	"github.com/prometheus/prometheus/config"
 	"github.com/prometheus/prometheus/model/histogram"
 	"github.com/prometheus/prometheus/model/labels"
-	"github.com/prometheus/prometheus/model/textparse"
 	"github.com/prometheus/prometheus/model/timestamp"
 	"github.com/prometheus/prometheus/prompb"
 	"github.com/prometheus/prometheus/scrape"
@@ -180,7 +179,7 @@ func TestMetadataDelivery(t *testing.T) {
 	for i := 0; i < numMetadata; i++ {
 		metadata = append(metadata, scrape.MetricMetadata{
 			Metric: "prometheus_remote_storage_sent_metadata_bytes_total_" + strconv.Itoa(i),
-			Type:   textparse.MetricTypeCounter,
+			Type:   model.MetricTypeCounter,
 			Help:   "a nice help text",
 			Unit:   "",
 		})

tsdb/head_append.go

@@ -1038,7 +1038,7 @@ func (a *headAppender) Commit() (err error) {
 	for i, m := range a.metadata {
 		series = a.metadataSeries[i]
 		series.Lock()
-		series.meta = &metadata.Metadata{Type: record.ToTextparseMetricType(m.Type), Unit: m.Unit, Help: m.Help}
+		series.meta = &metadata.Metadata{Type: record.ToMetricType(m.Type), Unit: m.Unit, Help: m.Help}
 		series.Unlock()
 	}
 

tsdb/head_wal.go

@@ -388,7 +388,7 @@ Outer:
 					continue
 				}
 				s.meta = &metadata.Metadata{
-					Type: record.ToTextparseMetricType(m.Type),
+					Type: record.ToMetricType(m.Type),
 					Unit: m.Unit,
 					Help: m.Help,
 				}

tsdb/record/record.go

@@ -20,9 +20,10 @@ import (
 	"fmt"
 	"math"
 
+	"github.com/prometheus/common/model"
+
 	"github.com/prometheus/prometheus/model/histogram"
 	"github.com/prometheus/prometheus/model/labels"
-	"github.com/prometheus/prometheus/model/textparse"
 	"github.com/prometheus/prometheus/storage"
 	"github.com/prometheus/prometheus/tsdb/chunks"
 	"github.com/prometheus/prometheus/tsdb/encoding"
@@ -90,45 +91,45 @@ const (
 	Stateset        MetricType = 7
 )
 
-func GetMetricType(t textparse.MetricType) uint8 {
+func GetMetricType(t model.MetricType) uint8 {
 	switch t {
-	case textparse.MetricTypeCounter:
+	case model.MetricTypeCounter:
 		return uint8(Counter)
-	case textparse.MetricTypeGauge:
+	case model.MetricTypeGauge:
 		return uint8(Gauge)
-	case textparse.MetricTypeHistogram:
+	case model.MetricTypeHistogram:
 		return uint8(HistogramSample)
-	case textparse.MetricTypeGaugeHistogram:
+	case model.MetricTypeGaugeHistogram:
 		return uint8(GaugeHistogram)
-	case textparse.MetricTypeSummary:
+	case model.MetricTypeSummary:
 		return uint8(Summary)
-	case textparse.MetricTypeInfo:
+	case model.MetricTypeInfo:
 		return uint8(Info)
-	case textparse.MetricTypeStateset:
+	case model.MetricTypeStateset:
 		return uint8(Stateset)
 	default:
 		return uint8(UnknownMT)
 	}
 }
 
-func ToTextparseMetricType(m uint8) textparse.MetricType {
+func ToMetricType(m uint8) model.MetricType {
 	switch m {
 	case uint8(Counter):
-		return textparse.MetricTypeCounter
+		return model.MetricTypeCounter
 	case uint8(Gauge):
-		return textparse.MetricTypeGauge
+		return model.MetricTypeGauge
 	case uint8(HistogramSample):
-		return textparse.MetricTypeHistogram
+		return model.MetricTypeHistogram
 	case uint8(GaugeHistogram):
-		return textparse.MetricTypeGaugeHistogram
+		return model.MetricTypeGaugeHistogram
 	case uint8(Summary):
-		return textparse.MetricTypeSummary
+		return model.MetricTypeSummary
 	case uint8(Info):
-		return textparse.MetricTypeInfo
+		return model.MetricTypeInfo
 	case uint8(Stateset):
-		return textparse.MetricTypeStateset
+		return model.MetricTypeStateset
 	default:
-		return textparse.MetricTypeUnknown
+		return model.MetricTypeUnknown
 	}
 }
 

web/api/v1/api.go

@@ -41,7 +41,7 @@ import (
 
 	"github.com/prometheus/prometheus/config"
 	"github.com/prometheus/prometheus/model/labels"
-	"github.com/prometheus/prometheus/model/textparse"
+	"github.com/prometheus/prometheus/model/metadata"
 	"github.com/prometheus/prometheus/model/timestamp"
 	"github.com/prometheus/prometheus/promql"
 	"github.com/prometheus/prometheus/promql/parser"
@@ -1141,11 +1141,11 @@ func (api *API) targetMetadata(r *http.Request) apiFuncResult {
 }
 
 type metricMetadata struct {
-	Target labels.Labels        `json:"target"`
+	Target labels.Labels    `json:"target"`
-	Metric string               `json:"metric,omitempty"`
+	Metric string           `json:"metric,omitempty"`
-	Type   textparse.MetricType `json:"type"`
+	Type   model.MetricType `json:"type"`
-	Help   string               `json:"help"`
+	Help   string           `json:"help"`
-	Unit   string               `json:"unit"`
+	Unit   string           `json:"unit"`
 }
 
 // AlertmanagerDiscovery has all the active Alertmanagers.
@@ -1221,14 +1221,8 @@ func rulesAlertsToAPIAlerts(rulesAlerts []*rules.Alert) []*Alert {
 	return apiAlerts
 }
 
-type metadata struct {
-	Type textparse.MetricType `json:"type"`
-	Help string               `json:"help"`
-	Unit string               `json:"unit"`
-}
-
 func (api *API) metricMetadata(r *http.Request) apiFuncResult {
-	metrics := map[string]map[metadata]struct{}{}
+	metrics := map[string]map[metadata.Metadata]struct{}{}
 
 	limit := -1
 	if s := r.FormValue("limit"); s != "" {
@@ -1250,7 +1244,7 @@ func (api *API) metricMetadata(r *http.Request) apiFuncResult {
 		for _, t := range tt {
 			if metric == "" {
 				for _, mm := range t.ListMetadata() {
-					m := metadata{Type: mm.Type, Help: mm.Help, Unit: mm.Unit}
+					m := metadata.Metadata{Type: mm.Type, Help: mm.Help, Unit: mm.Unit}
 					ms, ok := metrics[mm.Metric]
 
 					if limitPerMetric > 0 && len(ms) >= limitPerMetric {
@@ -1258,7 +1252,7 @@ func (api *API) metricMetadata(r *http.Request) apiFuncResult {
 					}
 
 					if !ok {
-						ms = map[metadata]struct{}{}
+						ms = map[metadata.Metadata]struct{}{}
 						metrics[mm.Metric] = ms
 					}
 					ms[m] = struct{}{}
@@ -1267,7 +1261,7 @@ func (api *API) metricMetadata(r *http.Request) apiFuncResult {
 			}
 
 			if md, ok := t.GetMetadata(metric); ok {
-				m := metadata{Type: md.Type, Help: md.Help, Unit: md.Unit}
+				m := metadata.Metadata{Type: md.Type, Help: md.Help, Unit: md.Unit}
 				ms, ok := metrics[md.Metric]
 
 				if limitPerMetric > 0 && len(ms) >= limitPerMetric {
@@ -1275,7 +1269,7 @@ func (api *API) metricMetadata(r *http.Request) apiFuncResult {
 				}
 
 				if !ok {
-					ms = map[metadata]struct{}{}
+					ms = map[metadata.Metadata]struct{}{}
 					metrics[md.Metric] = ms
 				}
 				ms[m] = struct{}{}
@@ -1284,13 +1278,13 @@ func (api *API) metricMetadata(r *http.Request) apiFuncResult {
 	}
 
 	// Put the elements from the pseudo-set into a slice for marshaling.
-	res := map[string][]metadata{}
+	res := map[string][]metadata.Metadata{}
 	for name, set := range metrics {
 		if limit >= 0 && len(res) >= limit {
 			break
 		}
 
-		s := []metadata{}
+		s := []metadata.Metadata{}
 		for metadata := range set {
 			s = append(s, metadata)
 		}

web/api/v1/api_test.go

@@ -44,7 +44,7 @@ import (
 	"github.com/prometheus/prometheus/config"
 	"github.com/prometheus/prometheus/model/exemplar"
 	"github.com/prometheus/prometheus/model/labels"
-	"github.com/prometheus/prometheus/model/textparse"
+	"github.com/prometheus/prometheus/model/metadata"
 	"github.com/prometheus/prometheus/model/timestamp"
 	"github.com/prometheus/prometheus/promql"
 	"github.com/prometheus/prometheus/promql/parser"
@@ -1584,7 +1584,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created.",
 							Unit:   "",
 						},
@@ -1597,7 +1597,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 						"job": "test",
 					}),
 					Help: "Number of OS threads created.",
-					Type: textparse.MetricTypeGauge,
+					Type: model.MetricTypeGauge,
 					Unit: "",
 				},
 			},
@@ -1614,7 +1614,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "prometheus_tsdb_storage_blocks_bytes",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "The number of bytes that are currently used for local storage by all blocks.",
 							Unit:   "",
 						},
@@ -1628,7 +1628,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					}),
 					Metric: "prometheus_tsdb_storage_blocks_bytes",
 					Help:   "The number of bytes that are currently used for local storage by all blocks.",
-					Type:   textparse.MetricTypeGauge,
+					Type:   model.MetricTypeGauge,
 					Unit:   "",
 				},
 			},
@@ -1642,7 +1642,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created.",
 							Unit:   "",
 						},
@@ -1653,7 +1653,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "prometheus_tsdb_storage_blocks_bytes",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "The number of bytes that are currently used for local storage by all blocks.",
 							Unit:   "",
 						},
@@ -1667,7 +1667,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					}),
 					Metric: "go_threads",
 					Help:   "Number of OS threads created.",
-					Type:   textparse.MetricTypeGauge,
+					Type:   model.MetricTypeGauge,
 					Unit:   "",
 				},
 				{
@@ -1676,7 +1676,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					}),
 					Metric: "prometheus_tsdb_storage_blocks_bytes",
 					Help:   "The number of bytes that are currently used for local storage by all blocks.",
-					Type:   textparse.MetricTypeGauge,
+					Type:   model.MetricTypeGauge,
 					Unit:   "",
 				},
 			},
@@ -1719,22 +1719,22 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "prometheus_engine_query_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "Query timings",
 							Unit:   "",
 						},
 						{
 							Metric: "go_info",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Information about the Go environment.",
 							Unit:   "",
 						},
 					},
 				},
 			},
-			response: map[string][]metadata{
+			response: map[string][]metadata.Metadata{
-				"prometheus_engine_query_duration_seconds": {{textparse.MetricTypeSummary, "Query timings", ""}},
+				"prometheus_engine_query_duration_seconds": {{Type: model.MetricTypeSummary, Help: "Query timings", Unit: ""}},
-				"go_info": {{textparse.MetricTypeGauge, "Information about the Go environment.", ""}},
+				"go_info": {{Type: model.MetricTypeGauge, Help: "Information about the Go environment.", Unit: ""}},
 			},
 		},
 		// With duplicate metadata for a metric that comes from different targets.
@@ -1746,7 +1746,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
@@ -1757,15 +1757,15 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
 					},
 				},
 			},
-			response: map[string][]metadata{
+			response: map[string][]metadata.Metadata{
-				"go_threads": {{textparse.MetricTypeGauge, "Number of OS threads created", ""}},
+				"go_threads": {{Type: model.MetricTypeGauge, Help: "Number of OS threads created"}},
 			},
 		},
 		// With non-duplicate metadata for the same metric from different targets.
@@ -1777,7 +1777,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
@@ -1788,21 +1788,21 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads that were created.",
 							Unit:   "",
 						},
 					},
 				},
 			},
-			response: map[string][]metadata{
+			response: map[string][]metadata.Metadata{
 				"go_threads": {
-					{textparse.MetricTypeGauge, "Number of OS threads created", ""},
+					{Type: model.MetricTypeGauge, Help: "Number of OS threads created"},
-					{textparse.MetricTypeGauge, "Number of OS threads that were created.", ""},
+					{Type: model.MetricTypeGauge, Help: "Number of OS threads that were created."},
 				},
 			},
 			sorter: func(m interface{}) {
-				v := m.(map[string][]metadata)["go_threads"]
+				v := m.(map[string][]metadata.Metadata)["go_threads"]
 
 				sort.Slice(v, func(i, j int) bool {
 					return v[i].Help < v[j].Help
@@ -1821,13 +1821,13 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
 						{
 							Metric: "prometheus_engine_query_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "Query Timmings.",
 							Unit:   "",
 						},
@@ -1838,7 +1838,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_gc_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "A summary of the GC invocation durations.",
 							Unit:   "",
 						},
@@ -1857,31 +1857,31 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Repeated metadata",
 							Unit:   "",
 						},
 						{
 							Metric: "go_gc_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "A summary of the GC invocation durations.",
 							Unit:   "",
 						},
 					},
 				},
 			},
-			response: map[string][]metadata{
+			response: map[string][]metadata.Metadata{
 				"go_threads": {
-					{textparse.MetricTypeGauge, "Number of OS threads created", ""},
+					{Type: model.MetricTypeGauge, Help: "Number of OS threads created"},
 				},
 				"go_gc_duration_seconds": {
-					{textparse.MetricTypeSummary, "A summary of the GC invocation durations.", ""},
+					{Type: model.MetricTypeSummary, Help: "A summary of the GC invocation durations."},
 				},
 			},
 		},
@@ -1895,19 +1895,19 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Repeated metadata",
 							Unit:   "",
 						},
 						{
 							Metric: "go_gc_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "A summary of the GC invocation durations.",
 							Unit:   "",
 						},
@@ -1928,19 +1928,19 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Repeated metadata",
 							Unit:   "",
 						},
 						{
 							Metric: "go_gc_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "A summary of the GC invocation durations.",
 							Unit:   "",
 						},
@@ -1951,13 +1951,13 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created, but from a different target",
 							Unit:   "",
 						},
 						{
 							Metric: "go_gc_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "A summary of the GC invocation durations, but from a different target.",
 							Unit:   "",
 						},
@@ -1977,7 +1977,7 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
@@ -1988,27 +1988,27 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_gc_duration_seconds",
-							Type:   textparse.MetricTypeSummary,
+							Type:   model.MetricTypeSummary,
 							Help:   "A summary of the GC invocation durations.",
 							Unit:   "",
 						},
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads that were created.",
 							Unit:   "",
 						},
 					},
 				},
 			},
-			response: map[string][]metadata{
+			response: map[string][]metadata.Metadata{
 				"go_threads": {
-					{textparse.MetricTypeGauge, "Number of OS threads created", ""},
+					{Type: model.MetricTypeGauge, Help: "Number of OS threads created"},
-					{textparse.MetricTypeGauge, "Number of OS threads that were created.", ""},
+					{Type: model.MetricTypeGauge, Help: "Number of OS threads that were created."},
 				},
 			},
 			sorter: func(m interface{}) {
-				v := m.(map[string][]metadata)["go_threads"]
+				v := m.(map[string][]metadata.Metadata)["go_threads"]
 
 				sort.Slice(v, func(i, j int) bool {
 					return v[i].Help < v[j].Help
@@ -2025,19 +2025,19 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
 					metadata: []scrape.MetricMetadata{
 						{
 							Metric: "go_threads",
-							Type:   textparse.MetricTypeGauge,
+							Type:   model.MetricTypeGauge,
 							Help:   "Number of OS threads created",
 							Unit:   "",
 						},
 					},
 				},
 			},
-			response: map[string][]metadata{},
+			response: map[string][]metadata.Metadata{},
 		},
 		// With no available metadata.
 		{
 			endpoint: api.metricMetadata,
-			response: map[string][]metadata{},
+			response: map[string][]metadata.Metadata{},
 		},
 		{
 			endpoint: api.serveConfig,
@@ -2931,7 +2931,7 @@ func assertAPIResponseMetadataLen(t *testing.T, got interface{}, expLen int) {
 	t.Helper()
 
 	var gotLen int
-	response := got.(map[string][]metadata)
+	response := got.(map[string][]metadata.Metadata)
 	for _, m := range response {
 		gotLen += len(m)
 	}