add version string (#54)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "boomerang-opentelemetry-plugin",
-  "version": "0.48.0-1",
+  "version": "0.48.0-3",
   "description": "This is a Boomerang plugin for collecting spans using the OpenTelemetry framework and exporting them, e.g., to an OpenTelemetry collector.",
   "repository": "https://github.com/NovatecConsulting/boomerang-opentelemetry-plugin",
   "license": "Apache-2.0",

src/index.ts

@@ -26,12 +26,15 @@ if (isIE && usesPrototype) {
   delete Array.prototype.entries;
 }
 
-import OpenTelemetryTracingImpl from './impl';
-
 if (currentEntriesFn) {
   Array.prototype.entries = currentEntriesFn;
 }
 
+// Get current plugin version specified in package.json
+const { version } = require('../package.json');
+
+import OpenTelemetryTracingImpl from './impl';
+
 /**
  * Skeleton template for all boomerang plugins.
  *
@@ -83,10 +86,14 @@ if (currentEntriesFn) {
       return this;
     },
 
+    // Return the current OpenTelemetry-Plugin version from package.json
+    // Has to be updated for every release!
+    version: version,
+
     // Executes the specified function within the context of the given span
     withSpan: impl.withSpan,
 
-    // Getting an OpenTelemetry tracer instace for manual tracing
+    // Getting an OpenTelemetry tracer instance for manual tracing
     getTracer: impl.getTracer,
 
     // Returns the internally used OpenTelemetry API