vendor: update buildkit to v0.18.0-rc1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/go.opentelemetry.io/otel/metric/README.md

@@ -0,0 +1,3 @@
+# Metric API
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/metric)](https://pkg.go.dev/go.opentelemetry.io/otel/metric)

vendor/go.opentelemetry.io/otel/metric/asyncfloat64.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
@@ -50,7 +39,7 @@ type Float64ObservableCounter interface {
 }
 
 // Float64ObservableCounterConfig contains options for asynchronous counter
-// instruments that record int64 values.
+// instruments that record float64 values.
 type Float64ObservableCounterConfig struct {
 	description string
 	unit        string
@@ -108,7 +97,7 @@ type Float64ObservableUpDownCounter interface {
 }
 
 // Float64ObservableUpDownCounterConfig contains options for asynchronous
-// counter instruments that record int64 values.
+// counter instruments that record float64 values.
 type Float64ObservableUpDownCounterConfig struct {
 	description string
 	unit        string
@@ -165,7 +154,7 @@ type Float64ObservableGauge interface {
 }
 
 // Float64ObservableGaugeConfig contains options for asynchronous counter
-// instruments that record int64 values.
+// instruments that record float64 values.
 type Float64ObservableGaugeConfig struct {
 	description string
 	unit        string

vendor/go.opentelemetry.io/otel/metric/asyncint64.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 

vendor/go.opentelemetry.io/otel/metric/config.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 

vendor/go.opentelemetry.io/otel/metric/doc.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 /*
 Package metric provides the OpenTelemetry API used to measure metrics about
@@ -68,6 +57,23 @@ asynchronous measurement, a Gauge ([Int64ObservableGauge] and
 See the [OpenTelemetry documentation] for more information about instruments
 and their intended use.
 
+# Instrument Name
+
+OpenTelemetry defines an [instrument name syntax] that restricts what
+instrument names are allowed.
+
+Instrument names should ...
+
+  - Not be empty.
+  - Have an alphabetic character as their first letter.
+  - Have any letter after the first be an alphanumeric character, ‘_’, ‘.’,
+    ‘-’, or ‘/’.
+  - Have a maximum length of 255 letters.
+
+To ensure compatibility with observability platforms, all instruments created
+need to conform to this syntax. Not all implementations of the API will validate
+these names, it is the callers responsibility to ensure compliance.
+
 # Measurements
 
 Measurements are made by recording values and information about the values with
@@ -164,6 +170,7 @@ It is strongly recommended that authors only embed
 That implementation is the only one OpenTelemetry authors can guarantee will
 fully implement all the API interfaces when a user updates their API.
 
+[instrument name syntax]: https://opentelemetry.io/docs/specs/otel/metrics/api/#instrument-name-syntax
 [OpenTelemetry documentation]: https://opentelemetry.io/docs/concepts/signals/metrics/
 [GetMeterProvider]: https://pkg.go.dev/go.opentelemetry.io/otel#GetMeterProvider
 */

vendor/go.opentelemetry.io/otel/metric/embedded/README.md

@@ -0,0 +1,3 @@
+# Metric Embedded
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/metric/embedded)](https://pkg.go.dev/go.opentelemetry.io/otel/metric/embedded)

vendor/go.opentelemetry.io/otel/metric/embedded/embedded.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package embedded provides interfaces embedded within the [OpenTelemetry
 // metric API].
@@ -113,6 +102,16 @@ type Float64Counter interface{ float64Counter() }
 // the API package).
 type Float64Histogram interface{ float64Histogram() }
 
+// Float64Gauge is embedded in [go.opentelemetry.io/otel/metric.Float64Gauge].
+//
+// Embed this interface in your implementation of the
+// [go.opentelemetry.io/otel/metric.Float64Gauge] if you want users to
+// experience a compilation error, signaling they need to update to your latest
+// implementation, when the [go.opentelemetry.io/otel/metric.Float64Gauge]
+// interface is extended (which is something that can happen without a major
+// version bump of the API package).
+type Float64Gauge interface{ float64Gauge() }
+
 // Float64ObservableCounter is embedded in
 // [go.opentelemetry.io/otel/metric.Float64ObservableCounter].
 //
@@ -185,6 +184,16 @@ type Int64Counter interface{ int64Counter() }
 // the API package).
 type Int64Histogram interface{ int64Histogram() }
 
+// Int64Gauge is embedded in [go.opentelemetry.io/otel/metric.Int64Gauge].
+//
+// Embed this interface in your implementation of the
+// [go.opentelemetry.io/otel/metric.Int64Gauge] if you want users to experience
+// a compilation error, signaling they need to update to your latest
+// implementation, when the [go.opentelemetry.io/otel/metric.Int64Gauge]
+// interface is extended (which is something that can happen without a major
+// version bump of the API package).
+type Int64Gauge interface{ int64Gauge() }
+
 // Int64ObservableCounter is embedded in
 // [go.opentelemetry.io/otel/metric.Int64ObservableCounter].
 //

vendor/go.opentelemetry.io/otel/metric/instrument.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
@@ -27,6 +16,7 @@ type InstrumentOption interface {
 	Int64CounterOption
 	Int64UpDownCounterOption
 	Int64HistogramOption
+	Int64GaugeOption
 	Int64ObservableCounterOption
 	Int64ObservableUpDownCounterOption
 	Int64ObservableGaugeOption
@@ -34,6 +24,7 @@ type InstrumentOption interface {
 	Float64CounterOption
 	Float64UpDownCounterOption
 	Float64HistogramOption
+	Float64GaugeOption
 	Float64ObservableCounterOption
 	Float64ObservableUpDownCounterOption
 	Float64ObservableGaugeOption
@@ -62,6 +53,11 @@ func (o descOpt) applyFloat64Histogram(c Float64HistogramConfig) Float64Histogra
 	return c
 }
 
+func (o descOpt) applyFloat64Gauge(c Float64GaugeConfig) Float64GaugeConfig {
+	c.description = string(o)
+	return c
+}
+
 func (o descOpt) applyFloat64ObservableCounter(c Float64ObservableCounterConfig) Float64ObservableCounterConfig {
 	c.description = string(o)
 	return c
@@ -92,6 +88,11 @@ func (o descOpt) applyInt64Histogram(c Int64HistogramConfig) Int64HistogramConfi
 	return c
 }
 
+func (o descOpt) applyInt64Gauge(c Int64GaugeConfig) Int64GaugeConfig {
+	c.description = string(o)
+	return c
+}
+
 func (o descOpt) applyInt64ObservableCounter(c Int64ObservableCounterConfig) Int64ObservableCounterConfig {
 	c.description = string(o)
 	return c
@@ -127,6 +128,11 @@ func (o unitOpt) applyFloat64Histogram(c Float64HistogramConfig) Float64Histogra
 	return c
 }
 
+func (o unitOpt) applyFloat64Gauge(c Float64GaugeConfig) Float64GaugeConfig {
+	c.unit = string(o)
+	return c
+}
+
 func (o unitOpt) applyFloat64ObservableCounter(c Float64ObservableCounterConfig) Float64ObservableCounterConfig {
 	c.unit = string(o)
 	return c
@@ -157,6 +163,11 @@ func (o unitOpt) applyInt64Histogram(c Int64HistogramConfig) Int64HistogramConfi
 	return c
 }
 
+func (o unitOpt) applyInt64Gauge(c Int64GaugeConfig) Int64GaugeConfig {
+	c.unit = string(o)
+	return c
+}
+
 func (o unitOpt) applyInt64ObservableCounter(c Int64ObservableCounterConfig) Int64ObservableCounterConfig {
 	c.unit = string(o)
 	return c

vendor/go.opentelemetry.io/otel/metric/meter.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
@@ -58,17 +47,37 @@ type Meter interface {
 	// Int64Counter returns a new Int64Counter instrument identified by name
 	// and configured with options. The instrument is used to synchronously
 	// record increasing int64 measurements during a computational operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Int64Counter(name string, options ...Int64CounterOption) (Int64Counter, error)
 	// Int64UpDownCounter returns a new Int64UpDownCounter instrument
 	// identified by name and configured with options. The instrument is used
 	// to synchronously record int64 measurements during a computational
 	// operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Int64UpDownCounter(name string, options ...Int64UpDownCounterOption) (Int64UpDownCounter, error)
 	// Int64Histogram returns a new Int64Histogram instrument identified by
 	// name and configured with options. The instrument is used to
 	// synchronously record the distribution of int64 measurements during a
 	// computational operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Int64Histogram(name string, options ...Int64HistogramOption) (Int64Histogram, error)
+	// Int64Gauge returns a new Int64Gauge instrument identified by name and
+	// configured with options. The instrument is used to synchronously record
+	// instantaneous int64 measurements during a computational operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
+	Int64Gauge(name string, options ...Int64GaugeOption) (Int64Gauge, error)
 	// Int64ObservableCounter returns a new Int64ObservableCounter identified
 	// by name and configured with options. The instrument is used to
 	// asynchronously record increasing int64 measurements once per a
@@ -78,6 +87,10 @@ type Meter interface {
 	// the WithInt64Callback option to register the callback here, or use the
 	// RegisterCallback method of this Meter to register one later. See the
 	// Measurements section of the package documentation for more information.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Int64ObservableCounter(name string, options ...Int64ObservableCounterOption) (Int64ObservableCounter, error)
 	// Int64ObservableUpDownCounter returns a new Int64ObservableUpDownCounter
 	// instrument identified by name and configured with options. The
@@ -88,6 +101,10 @@ type Meter interface {
 	// the WithInt64Callback option to register the callback here, or use the
 	// RegisterCallback method of this Meter to register one later. See the
 	// Measurements section of the package documentation for more information.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Int64ObservableUpDownCounter(name string, options ...Int64ObservableUpDownCounterOption) (Int64ObservableUpDownCounter, error)
 	// Int64ObservableGauge returns a new Int64ObservableGauge instrument
 	// identified by name and configured with options. The instrument is used
@@ -98,23 +115,47 @@ type Meter interface {
 	// the WithInt64Callback option to register the callback here, or use the
 	// RegisterCallback method of this Meter to register one later. See the
 	// Measurements section of the package documentation for more information.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Int64ObservableGauge(name string, options ...Int64ObservableGaugeOption) (Int64ObservableGauge, error)
 
 	// Float64Counter returns a new Float64Counter instrument identified by
 	// name and configured with options. The instrument is used to
 	// synchronously record increasing float64 measurements during a
 	// computational operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Float64Counter(name string, options ...Float64CounterOption) (Float64Counter, error)
 	// Float64UpDownCounter returns a new Float64UpDownCounter instrument
 	// identified by name and configured with options. The instrument is used
 	// to synchronously record float64 measurements during a computational
 	// operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Float64UpDownCounter(name string, options ...Float64UpDownCounterOption) (Float64UpDownCounter, error)
 	// Float64Histogram returns a new Float64Histogram instrument identified by
 	// name and configured with options. The instrument is used to
 	// synchronously record the distribution of float64 measurements during a
 	// computational operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Float64Histogram(name string, options ...Float64HistogramOption) (Float64Histogram, error)
+	// Float64Gauge returns a new Float64Gauge instrument identified by name and
+	// configured with options. The instrument is used to synchronously record
+	// instantaneous float64 measurements during a computational operation.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
+	Float64Gauge(name string, options ...Float64GaugeOption) (Float64Gauge, error)
 	// Float64ObservableCounter returns a new Float64ObservableCounter
 	// instrument identified by name and configured with options. The
 	// instrument is used to asynchronously record increasing float64
@@ -124,6 +165,10 @@ type Meter interface {
 	// the WithFloat64Callback option to register the callback here, or use the
 	// RegisterCallback method of this Meter to register one later. See the
 	// Measurements section of the package documentation for more information.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Float64ObservableCounter(name string, options ...Float64ObservableCounterOption) (Float64ObservableCounter, error)
 	// Float64ObservableUpDownCounter returns a new
 	// Float64ObservableUpDownCounter instrument identified by name and
@@ -134,6 +179,10 @@ type Meter interface {
 	// the WithFloat64Callback option to register the callback here, or use the
 	// RegisterCallback method of this Meter to register one later. See the
 	// Measurements section of the package documentation for more information.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Float64ObservableUpDownCounter(name string, options ...Float64ObservableUpDownCounterOption) (Float64ObservableUpDownCounter, error)
 	// Float64ObservableGauge returns a new Float64ObservableGauge instrument
 	// identified by name and configured with options. The instrument is used
@@ -144,6 +193,10 @@ type Meter interface {
 	// the WithFloat64Callback option to register the callback here, or use the
 	// RegisterCallback method of this Meter to register one later. See the
 	// Measurements section of the package documentation for more information.
+	//
+	// The name needs to conform to the OpenTelemetry instrument name syntax.
+	// See the Instrument Name section of the package documentation for more
+	// information.
 	Float64ObservableGauge(name string, options ...Float64ObservableGaugeOption) (Float64ObservableGauge, error)
 
 	// RegisterCallback registers f to be called during the collection of a

vendor/go.opentelemetry.io/otel/metric/noop/README.md

@@ -0,0 +1,3 @@
+# Metric Noop
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/metric/noop)](https://pkg.go.dev/go.opentelemetry.io/otel/metric/noop)

vendor/go.opentelemetry.io/otel/metric/noop/noop.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 // Package noop provides an implementation of the OpenTelemetry metric API that
 // produces no telemetry and minimizes used computation resources.
@@ -43,6 +32,8 @@ var (
 	_ metric.Float64UpDownCounter           = Float64UpDownCounter{}
 	_ metric.Int64Histogram                 = Int64Histogram{}
 	_ metric.Float64Histogram               = Float64Histogram{}
+	_ metric.Int64Gauge                     = Int64Gauge{}
+	_ metric.Float64Gauge                   = Float64Gauge{}
 	_ metric.Int64ObservableCounter         = Int64ObservableCounter{}
 	_ metric.Float64ObservableCounter       = Float64ObservableCounter{}
 	_ metric.Int64ObservableGauge           = Int64ObservableGauge{}
@@ -87,6 +78,12 @@ func (Meter) Int64Histogram(string, ...metric.Int64HistogramOption) (metric.Int6
 	return Int64Histogram{}, nil
 }
 
+// Int64Gauge returns a Gauge used to record int64 measurements that
+// produces no telemetry.
+func (Meter) Int64Gauge(string, ...metric.Int64GaugeOption) (metric.Int64Gauge, error) {
+	return Int64Gauge{}, nil
+}
+
 // Int64ObservableCounter returns an ObservableCounter used to record int64
 // measurements that produces no telemetry.
 func (Meter) Int64ObservableCounter(string, ...metric.Int64ObservableCounterOption) (metric.Int64ObservableCounter, error) {
@@ -123,6 +120,12 @@ func (Meter) Float64Histogram(string, ...metric.Float64HistogramOption) (metric.
 	return Float64Histogram{}, nil
 }
 
+// Float64Gauge returns a Gauge used to record float64 measurements that
+// produces no telemetry.
+func (Meter) Float64Gauge(string, ...metric.Float64GaugeOption) (metric.Float64Gauge, error) {
+	return Float64Gauge{}, nil
+}
+
 // Float64ObservableCounter returns an ObservableCounter used to record int64
 // measurements that produces no telemetry.
 func (Meter) Float64ObservableCounter(string, ...metric.Float64ObservableCounterOption) (metric.Float64ObservableCounter, error) {
@@ -208,6 +211,20 @@ type Float64Histogram struct{ embedded.Float64Histogram }
 // Record performs no operation.
 func (Float64Histogram) Record(context.Context, float64, ...metric.RecordOption) {}
 
+// Int64Gauge is an OpenTelemetry Gauge used to record instantaneous int64
+// measurements. It produces no telemetry.
+type Int64Gauge struct{ embedded.Int64Gauge }
+
+// Record performs no operation.
+func (Int64Gauge) Record(context.Context, int64, ...metric.RecordOption) {}
+
+// Float64Gauge is an OpenTelemetry Gauge used to record instantaneous float64
+// measurements. It produces no telemetry.
+type Float64Gauge struct{ embedded.Float64Gauge }
+
+// Record performs no operation.
+func (Float64Gauge) Record(context.Context, float64, ...metric.RecordOption) {}
+
 // Int64ObservableCounter is an OpenTelemetry ObservableCounter used to record
 // int64 measurements. It produces no telemetry.
 type Int64ObservableCounter struct {

vendor/go.opentelemetry.io/otel/metric/syncfloat64.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
@@ -39,7 +28,7 @@ type Float64Counter interface {
 }
 
 // Float64CounterConfig contains options for synchronous counter instruments that
-// record int64 values.
+// record float64 values.
 type Float64CounterConfig struct {
 	description string
 	unit        string
@@ -92,7 +81,7 @@ type Float64UpDownCounter interface {
 }
 
 // Float64UpDownCounterConfig contains options for synchronous counter
-// instruments that record int64 values.
+// instruments that record float64 values.
 type Float64UpDownCounterConfig struct {
 	description string
 	unit        string
@@ -144,8 +133,8 @@ type Float64Histogram interface {
 	Record(ctx context.Context, incr float64, options ...RecordOption)
 }
 
-// Float64HistogramConfig contains options for synchronous counter instruments
-// that record int64 values.
+// Float64HistogramConfig contains options for synchronous histogram
+// instruments that record float64 values.
 type Float64HistogramConfig struct {
 	description              string
 	unit                     string
@@ -183,3 +172,55 @@ func (c Float64HistogramConfig) ExplicitBucketBoundaries() []float64 {
 type Float64HistogramOption interface {
 	applyFloat64Histogram(Float64HistogramConfig) Float64HistogramConfig
 }
+
+// Float64Gauge is an instrument that records instantaneous float64 values.
+//
+// Warning: Methods may be added to this interface in minor releases. See
+// package documentation on API implementation for information on how to set
+// default behavior for unimplemented methods.
+type Float64Gauge interface {
+	// Users of the interface can ignore this. This embedded type is only used
+	// by implementations of this interface. See the "API Implementations"
+	// section of the package documentation for more information.
+	embedded.Float64Gauge
+
+	// Record records the instantaneous value.
+	//
+	// Use the WithAttributeSet (or, if performance is not a concern,
+	// the WithAttributes) option to include measurement attributes.
+	Record(ctx context.Context, value float64, options ...RecordOption)
+}
+
+// Float64GaugeConfig contains options for synchronous gauge instruments that
+// record float64 values.
+type Float64GaugeConfig struct {
+	description string
+	unit        string
+}
+
+// NewFloat64GaugeConfig returns a new [Float64GaugeConfig] with all opts
+// applied.
+func NewFloat64GaugeConfig(opts ...Float64GaugeOption) Float64GaugeConfig {
+	var config Float64GaugeConfig
+	for _, o := range opts {
+		config = o.applyFloat64Gauge(config)
+	}
+	return config
+}
+
+// Description returns the configured description.
+func (c Float64GaugeConfig) Description() string {
+	return c.description
+}
+
+// Unit returns the configured unit.
+func (c Float64GaugeConfig) Unit() string {
+	return c.unit
+}
+
+// Float64GaugeOption applies options to a [Float64GaugeConfig]. See
+// [InstrumentOption] for other options that can be used as a
+// Float64GaugeOption.
+type Float64GaugeOption interface {
+	applyFloat64Gauge(Float64GaugeConfig) Float64GaugeConfig
+}

vendor/go.opentelemetry.io/otel/metric/syncint64.go

@@ -1,16 +1,5 @@
 // Copyright The OpenTelemetry Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
 
 package metric // import "go.opentelemetry.io/otel/metric"
 
@@ -144,7 +133,7 @@ type Int64Histogram interface {
 	Record(ctx context.Context, incr int64, options ...RecordOption)
 }
 
-// Int64HistogramConfig contains options for synchronous counter instruments
+// Int64HistogramConfig contains options for synchronous histogram instruments
 // that record int64 values.
 type Int64HistogramConfig struct {
 	description              string
@@ -183,3 +172,55 @@ func (c Int64HistogramConfig) ExplicitBucketBoundaries() []float64 {
 type Int64HistogramOption interface {
 	applyInt64Histogram(Int64HistogramConfig) Int64HistogramConfig
 }
+
+// Int64Gauge is an instrument that records instantaneous int64 values.
+//
+// Warning: Methods may be added to this interface in minor releases. See
+// package documentation on API implementation for information on how to set
+// default behavior for unimplemented methods.
+type Int64Gauge interface {
+	// Users of the interface can ignore this. This embedded type is only used
+	// by implementations of this interface. See the "API Implementations"
+	// section of the package documentation for more information.
+	embedded.Int64Gauge
+
+	// Record records the instantaneous value.
+	//
+	// Use the WithAttributeSet (or, if performance is not a concern,
+	// the WithAttributes) option to include measurement attributes.
+	Record(ctx context.Context, value int64, options ...RecordOption)
+}
+
+// Int64GaugeConfig contains options for synchronous gauge instruments that
+// record int64 values.
+type Int64GaugeConfig struct {
+	description string
+	unit        string
+}
+
+// NewInt64GaugeConfig returns a new [Int64GaugeConfig] with all opts
+// applied.
+func NewInt64GaugeConfig(opts ...Int64GaugeOption) Int64GaugeConfig {
+	var config Int64GaugeConfig
+	for _, o := range opts {
+		config = o.applyInt64Gauge(config)
+	}
+	return config
+}
+
+// Description returns the configured description.
+func (c Int64GaugeConfig) Description() string {
+	return c.description
+}
+
+// Unit returns the configured unit.
+func (c Int64GaugeConfig) Unit() string {
+	return c.unit
+}
+
+// Int64GaugeOption applies options to a [Int64GaugeConfig]. See
+// [InstrumentOption] for other options that can be used as a
+// Int64GaugeOption.
+type Int64GaugeOption interface {
+	applyInt64Gauge(Int64GaugeConfig) Int64GaugeConfig
+}