Add Version func to otlpmetric and otlptrace (#3956)

* Add Version func to otel/exporters/otlp/otlpmetric

* Add Version func to otel/exporters/otlp/otlptrace

* Remove Version func from otel/exporters/otlp/internal

* Update CHANGELOG.md

* Add nolint rule to hostid readFile

* Move GetUserAgentHeader to internal packages

* Update exporters/otlp/otlpmetric/version.go

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

* Update exporters/otlp/otlptrace/version.go

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

---------

Co-authored-by: Chester Cheung <cheung.zhy.csu@gmail.com>
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

CHANGELOG.md

@@ -13,6 +13,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - The `go.opentelemetry.io/otel/metric/embedded` package. (#3916)
 - The `Version` function to `go.opentelemetry.io/otel/sdk` to return the SDK version. (#3949)
 - Add a `WithNamespace` option to `go.opentelemetry.io/otel/exporters/prometheus` to allow users to prefix metrics with a namespace. (#3970)
+- The `Version` function to `go.opentelemetry.io/otel/exporters/otlp/otlpmetric` to return the OTLP metrics client version. (#3956)
+- The `Version` function to `go.opentelemetry.io/otel/exporters/otlp/otlptrace` to return the OTLP trace client version. (#3956)
 
 ### Changed
 

exporters/otlp/internal/header.go → exporters/otlp/otlpmetric/internal/header.go

@@ -12,13 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Package internal contains common functionality for all OTLP exporters.
-package internal // import "go.opentelemetry.io/otel/exporters/otlp/internal"
+package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal"
 
-import "go.opentelemetry.io/otel"
+import (
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric"
+)
 
-// GetUserAgentHeader return an OTLP header value form "OTel OTLP Exporter Go/{{ .Version }}"
+// GetUserAgentHeader returns an OTLP header value form "OTel OTLP Exporter Go/{{ .Version }}"
 // https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/exporter.md#user-agent
 func GetUserAgentHeader() string {
-	return "OTel OTLP Exporter Go/" + otel.Version()
+	return "OTel OTLP Exporter Go/" + otlpmetric.Version()
 }

exporters/otlp/internal/header_test.go → exporters/otlp/otlpmetric/internal/header_test.go

@@ -12,8 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Package internal contains common functionality for all OTLP exporters.
-package internal // import "go.opentelemetry.io/otel/exporters/otlp/internal"
+package internal
 
 import (
 	"testing"

exporters/otlp/otlpmetric/internal/oconf/options.go

@@ -27,6 +27,7 @@ import (
 
 	"go.opentelemetry.io/otel/exporters/otlp/internal"
 	"go.opentelemetry.io/otel/exporters/otlp/internal/retry"
+	ominternal "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/internal"
 	"go.opentelemetry.io/otel/internal/global"
 	"go.opentelemetry.io/otel/sdk/metric"
 	"go.opentelemetry.io/otel/sdk/metric/aggregation"
@@ -116,7 +117,7 @@ func NewGRPCConfig(opts ...GRPCOption) Config {
 			AggregationSelector: metric.DefaultAggregationSelector,
 		},
 		RetryConfig: retry.DefaultConfig,
-		DialOptions: []grpc.DialOption{grpc.WithUserAgent(internal.GetUserAgentHeader())},
+		DialOptions: []grpc.DialOption{grpc.WithUserAgent(ominternal.GetUserAgentHeader())},
 	}
 	cfg = ApplyGRPCEnvConfigs(cfg)
 	for _, opt := range opts {

exporters/otlp/otlpmetric/otlpmetrichttp/client.go

@@ -108,7 +108,7 @@ func newClient(opts ...Option) (ominternal.Client, error) {
 		return nil, err
 	}
 
-	req.Header.Set("User-Agent", internal.GetUserAgentHeader())
+	req.Header.Set("User-Agent", ominternal.GetUserAgentHeader())
 
 	if n := len(cfg.Metrics.Headers); n > 0 {
 		for k, v := range cfg.Metrics.Headers {

exporters/otlp/otlpmetric/version.go

@@ -0,0 +1,20 @@
+// 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.
+
+package otlpmetric // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric"
+
+// Version is the current release version of the OpenTelemetry OTLP metrics exporter in use.
+func Version() string {
+	return "1.15.0-rc.2"
+}

exporters/otlp/otlpmetric/version_test.go

@@ -0,0 +1,34 @@
+// 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.
+
+package otlpmetric_test
+
+import (
+	"regexp"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric"
+)
+
+// regex taken from https://github.com/Masterminds/semver/tree/v3.1.1
+var versionRegex = regexp.MustCompile(`^v?([0-9]+)(\.[0-9]+)?(\.[0-9]+)?` +
+	`(-([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` +
+	`(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?$`)
+
+func TestVersionSemver(t *testing.T) {
+	v := otlpmetric.Version()
+	assert.NotNil(t, versionRegex.FindStringSubmatch(v), "version is not semver: %s", v)
+}

exporters/otlp/otlptrace/internal/header.go

@@ -0,0 +1,25 @@
+// 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.
+
+package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal"
+
+import (
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+)
+
+// GetUserAgentHeader returns an OTLP header value form "OTel OTLP Exporter Go/{{ .Version }}"
+// https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/exporter.md#user-agent
+func GetUserAgentHeader() string {
+	return "OTel OTLP Exporter Go/" + otlptrace.Version()
+}

exporters/otlp/otlptrace/internal/header_test.go

@@ -0,0 +1,25 @@
+// 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.
+
+package internal
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetUserAgentHeader(t *testing.T) {
+	require.Regexp(t, "OTel OTLP Exporter Go/1\\..*", GetUserAgentHeader())
+}

exporters/otlp/otlptrace/internal/otlpconfig/options.go

@@ -27,6 +27,7 @@ import (
 
 	"go.opentelemetry.io/otel/exporters/otlp/internal"
 	"go.opentelemetry.io/otel/exporters/otlp/internal/retry"
+	otinternal "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal"
 )
 
 const (
@@ -97,7 +98,7 @@ func NewGRPCConfig(opts ...GRPCOption) Config {
 			Timeout:     DefaultTimeout,
 		},
 		RetryConfig: retry.DefaultConfig,
-		DialOptions: []grpc.DialOption{grpc.WithUserAgent(internal.GetUserAgentHeader())},
+		DialOptions: []grpc.DialOption{grpc.WithUserAgent(otinternal.GetUserAgentHeader())},
 	}
 	cfg = ApplyGRPCEnvConfigs(cfg)
 	for _, opt := range opts {

exporters/otlp/otlptrace/otlptracehttp/client.go

@@ -33,6 +33,7 @@ import (
 	"go.opentelemetry.io/otel/exporters/otlp/internal"
 	"go.opentelemetry.io/otel/exporters/otlp/internal/retry"
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+	otinternal "go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal"
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
 	coltracepb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
 	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
@@ -209,7 +210,7 @@ func (d *client) newRequest(body []byte) (request, error) {
 		return request{Request: r}, err
 	}
 
-	r.Header.Set("User-Agent", internal.GetUserAgentHeader())
+	r.Header.Set("User-Agent", otinternal.GetUserAgentHeader())
 
 	for k, v := range d.cfg.Headers {
 		r.Header.Set(k, v)

exporters/otlp/otlptrace/version.go

@@ -0,0 +1,20 @@
+// 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.
+
+package otlptrace // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+
+// Version is the current release version of the OpenTelemetry OTLP trace exporter in use.
+func Version() string {
+	return "1.15.0-rc.2"
+}

exporters/otlp/otlptrace/version_test.go

@@ -0,0 +1,34 @@
+// 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.
+
+package otlptrace_test
+
+import (
+	"regexp"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+)
+
+// regex taken from https://github.com/Masterminds/semver/tree/v3.1.1
+var versionRegex = regexp.MustCompile(`^v?([0-9]+)(\.[0-9]+)?(\.[0-9]+)?` +
+	`(-([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` +
+	`(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?$`)
+
+func TestVersionSemver(t *testing.T) {
+	v := otlptrace.Version()
+	assert.NotNil(t, versionRegex.FindStringSubmatch(v), "version is not semver: %s", v)
+}

sdk/resource/host_id.go

@@ -38,6 +38,7 @@ type fileReader func(string) (string, error)
 
 type commandExecutor func(string, ...string) (string, error)
 
+// nolint: unused  // This is used by the hostReaderBSD, gated by build tags.
 func readFile(filename string) (string, error) {
 	b, err := os.ReadFile(filename)
 	if err != nil {