fix: replace otlp exporter with local implementation (#531)

* fix: replace otlp exporter with local implementation

* test: simple test case for serializeSpans

Author: mrstork

package-lock.json

@@ -120,7 +120,6 @@
     "@opentelemetry/api": "1.9.0",
     "@opentelemetry/core": "1.30.1",
     "@opentelemetry/instrumentation": "^0.203.0",
-    "@opentelemetry/otlp-transformer": "0.57.2",
     "@opentelemetry/resources": "1.30.1",
     "@opentelemetry/sdk-trace-node": "1.30.1"
   }

packages/otel/package.json

@@ -0,0 +1,133 @@
+import { serializeSpans } from './netlify.ts'
+import { SpanKind, SpanStatusCode, TraceFlags } from '@opentelemetry/api'
+import { TraceState } from '@opentelemetry/core'
+import { Resource } from '@opentelemetry/resources'
+import { ReadableSpan } from '@opentelemetry/sdk-trace-node'
+import { describe, test, expect } from 'vitest'
+
+function createSpan(): ReadableSpan {
+  return {
+    name: 'span-name',
+    kind: SpanKind.INTERNAL,
+    spanContext: () => ({
+      spanId: '0000000000000002',
+      traceFlags: TraceFlags.SAMPLED,
+      traceId: '00000000000000000000000000000001',
+      isRemote: false,
+      traceState: new TraceState('span=bar'),
+    }),
+    startTime: [1640715557, 342725388],
+    endTime: [1640715558, 642725388],
+    status: {
+      code: SpanStatusCode.OK,
+    },
+    attributes: { 'string-attribute': 'some attribute value' },
+    links: [
+      {
+        context: {
+          spanId: '0000000000000003',
+          traceId: '00000000000000000000000000000002',
+          traceFlags: TraceFlags.SAMPLED,
+          isRemote: false,
+          traceState: new TraceState('link=foo'),
+        },
+        attributes: {
+          'link-attribute': 'string value',
+        },
+      },
+    ],
+    events: [
+      {
+        name: 'event',
+        time: [1640715558, 542725388],
+        attributes: {
+          'event-attribute': 'string value',
+        },
+      },
+    ],
+    duration: [1, 300000000],
+    ended: true,
+    resource: new Resource({
+      'service.name': 'serviceName',
+      'service.version': 'serviceVersion',
+      'process.runtime.name': 'nodejs',
+      'process.runtime.version': 'runtimeVersion',
+      'deployment.environment': 'deploymentEnvironment',
+      'http.url': 'siteUrl',
+      'netlify.site.id': 'siteId',
+      'netlify.site.name': 'siteName',
+    }),
+    instrumentationLibrary: {
+      name: '@netlify/otel',
+      version: '1.0.0',
+    },
+    droppedAttributesCount: 0,
+    droppedEventsCount: 0,
+    droppedLinksCount: 0,
+  }
+}
+
+describe('`serializeSpans`', () => {
+  test('Returns expected results', () => {
+    const sampleSpans = [createSpan()]
+    const result = serializeSpans(sampleSpans)
+
+    const expectedResult = {
+      resourceSpans: [
+        {
+          resource: {
+            attributes: [
+              { key: 'service.name', value: { stringValue: 'serviceName' } },
+              { key: 'service.version', value: { stringValue: 'serviceVersion' } },
+              { key: 'process.runtime.name', value: { stringValue: 'nodejs' } },
+              { key: 'process.runtime.version', value: { stringValue: 'runtimeVersion' } },
+              { key: 'deployment.environment', value: { stringValue: 'deploymentEnvironment' } },
+              { key: 'http.url', value: { stringValue: 'siteUrl' } },
+              { key: 'netlify.site.id', value: { stringValue: 'siteId' } },
+              { key: 'netlify.site.name', value: { stringValue: 'siteName' } },
+            ],
+            droppedAttributesCount: 0,
+          },
+          scopeSpans: [
+            {
+              scope: { name: '@netlify/otel', version: '1.0.0' },
+              spans: [
+                {
+                  traceId: '00000000000000000000000000000001',
+                  spanId: '0000000000000002',
+                  name: 'span-name',
+                  kind: 1,
+                  startTimeUnixNano: '1640715557342725388',
+                  endTimeUnixNano: '1640715558642725388',
+                  attributes: [{ key: 'string-attribute', value: { stringValue: 'some attribute value' } }],
+                  droppedAttributesCount: 0,
+                  events: [
+                    {
+                      name: 'event',
+                      timeUnixNano: '1640715558542725388',
+                      attributes: [{ key: 'event-attribute', value: { stringValue: 'string value' } }],
+                      droppedAttributesCount: 0,
+                    },
+                  ],
+                  droppedEventsCount: 0,
+                  status: { code: 1 },
+                  links: [
+                    {
+                      spanId: '0000000000000003',
+                      traceId: '00000000000000000000000000000002',
+                      attributes: [{ key: 'link-attribute', value: { stringValue: 'string value' } }],
+                      droppedAttributesCount: 0,
+                    },
+                  ],
+                  droppedLinksCount: 0,
+                },
+              ],
+            },
+          ],
+        },
+      ],
+    }
+
+    expect(result).toEqual(expectedResult)
+  })
+})