Add scope version to opencensus trace and metric bridges (#4584)

CHANGELOG.md

@@ -11,6 +11,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 ### Added
 
 - Add `go.opentelemetry.io/otel/bridge/opencensus.InstallTraceBridge`, which installs the OpenCensus trace bridge, and replaces `opencensus.NewTracer`. (#4567)
+- Add scope version to trace and metric bridges in `go.opentelemetry.io/otel/bridge/opencensus`. (#4584)
 
 ### Deprecated
 

bridge/opencensus/metric.go

@@ -56,7 +56,8 @@ func (p *MetricProducer) Produce(context.Context) ([]metricdata.ScopeMetrics, er
 	}
 	return []metricdata.ScopeMetrics{{
 		Scope: instrumentation.Scope{
-			Name: scopeName,
+			Name:    scopeName,
+			Version: Version(),
 		},
 		Metrics: otelmetrics,
 	}}, err

bridge/opencensus/metric_test.go

@@ -64,7 +64,8 @@ func TestMetricProducer(t *testing.T) {
 			},
 			expected: []metricdata.ScopeMetrics{{
 				Scope: instrumentation.Scope{
-					Name: scopeName,
+					Name:    scopeName,
+					Version: Version(),
 				},
 				Metrics: []metricdata.Metrics{
 					{
@@ -112,7 +113,8 @@ func TestMetricProducer(t *testing.T) {
 			},
 			expected: []metricdata.ScopeMetrics{{
 				Scope: instrumentation.Scope{
-					Name: scopeName,
+					Name:    scopeName,
+					Version: Version(),
 				},
 				Metrics: []metricdata.Metrics{
 					{

bridge/opencensus/trace.go

@@ -36,9 +36,14 @@ func NewTracer(tracer trace.Tracer) octrace.Tracer {
 // the global OpenCensus tracer implementation. Once the bridge is installed,
 // spans recorded using OpenCensus are redirected to the OpenTelemetry SDK.
 func InstallTraceBridge(opts ...TraceOption) {
+	octrace.DefaultTracer = newTraceBridge(opts)
+}
+
+func newTraceBridge(opts []TraceOption) octrace.Tracer {
 	cfg := newTraceConfig(opts)
-	tracer := cfg.tp.Tracer(scopeName)
-	octrace.DefaultTracer = internal.NewTracer(tracer)
+	return internal.NewTracer(
+		cfg.tp.Tracer(scopeName, trace.WithInstrumentationVersion(Version())),
+	)
 }
 
 // OTelSpanContextToOC converts from an OpenTelemetry SpanContext to an

bridge/opencensus/trace_test.go

@@ -0,0 +1,39 @@
+// 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 opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/sdk/trace/tracetest"
+)
+
+func TestNewTraceBridge(t *testing.T) {
+	exporter := tracetest.NewInMemoryExporter()
+	tp := trace.NewTracerProvider(trace.WithSyncer(exporter))
+	bridge := newTraceBridge([]TraceOption{WithTracerProvider(tp)})
+	_, span := bridge.StartSpan(context.Background(), "foo")
+	span.End()
+	gotSpans := exporter.GetSpans()
+	require.Len(t, gotSpans, 1)
+	gotSpan := gotSpans[0]
+	assert.Equal(t, gotSpan.InstrumentationLibrary.Name, scopeName)
+	assert.Equal(t, gotSpan.InstrumentationLibrary.Version, Version())
+}

bridge/opencensus/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 opencensus // import "go.opentelemetry.io/otel/bridge/opencensus"
+
+// Version is the current release version of the opencensus bridge.
+func Version() string {
+	return "0.42.0"
+}