[8.x] [APM][OTel] Make agent names generic with otel-native mode (#19…

…6522)

## Summary

Manually cherry-picked #195594 due to backport script failed because of
collapsible section in original PR description.

packages/kbn-elastic-agent-utils/src/agent_names.ts

@@ -38,37 +38,13 @@ export const ELASTIC_AGENT_NAMES: ElasticAgentName[] = [
 ];
 
 export type OpenTelemetryAgentName =
-  | 'otlp'
   | 'opentelemetry'
-  | 'opentelemetry/cpp'
-  | 'opentelemetry/dotnet'
-  | 'opentelemetry/erlang'
-  | 'opentelemetry/go'
-  | 'opentelemetry/java'
-  | 'opentelemetry/nodejs'
-  | 'opentelemetry/php'
-  | 'opentelemetry/python'
-  | 'opentelemetry/ruby'
-  | 'opentelemetry/rust'
-  | 'opentelemetry/swift'
-  | 'opentelemetry/android'
-  | 'opentelemetry/webjs'
-  | 'otlp/cpp'
-  | 'otlp/dotnet'
-  | 'otlp/erlang'
-  | 'otlp/go'
-  | 'otlp/java'
-  | 'otlp/nodejs'
-  | 'otlp/php'
-  | 'otlp/python'
-  | 'otlp/ruby'
-  | 'otlp/rust'
-  | 'otlp/swift'
-  | 'otlp/android'
-  | 'otlp/webjs';
+  | 'otlp'
+  | `opentelemetry/${string}`
+  | `otlp/${string}`;
+export const OPEN_TELEMETRY_BASE_AGENT_NAMES: OpenTelemetryAgentName[] = ['otlp', 'opentelemetry'];
 export const OPEN_TELEMETRY_AGENT_NAMES: OpenTelemetryAgentName[] = [
-  'otlp',
-  'opentelemetry',
+  ...OPEN_TELEMETRY_BASE_AGENT_NAMES,
   'opentelemetry/cpp',
   'opentelemetry/dotnet',
   'opentelemetry/erlang',

packages/kbn-telemetry-tools/src/tools/__fixture__/telemetry_collectors/constants.ts

@@ -60,6 +60,9 @@ export interface MappedTypes {
   mappedTypeWithOneInlineProp: {
     [key in 'prop3']: number;
   };
+  mappedTypeWithLiteralTemplates: {
+    [key in MappedTypeProps | `templated_prop/${string}`]: number;
+  };
 }
 
 export type RecordWithKnownProps = Record<MappedTypeProps, number>;

packages/kbn-telemetry-tools/src/tools/serializer.test.ts

@@ -105,6 +105,13 @@ describe('getDescriptor', () => {
       mappedTypeWithOneInlineProp: {
         prop3: { kind: ts.SyntaxKind.NumberKeyword, type: 'NumberKeyword' },
       },
+      mappedTypeWithLiteralTemplates: {
+        prop1: { kind: ts.SyntaxKind.NumberKeyword, type: 'NumberKeyword' },
+        prop2: { kind: ts.SyntaxKind.NumberKeyword, type: 'NumberKeyword' },
+        // ideally, it'd be `templated_prop/@@INDEX@@` to be more explicit. But we're going with the fuzzier approach
+        // for now as it may require more changes downstream that are not worth it.
+        '@@INDEX@@': { kind: ts.SyntaxKind.NumberKeyword, type: 'NumberKeyword' },
+      },
     });
   });
 

packages/kbn-telemetry-tools/src/tools/serializer.ts

@@ -99,10 +99,15 @@ export function getConstraints(node: ts.Node, program: ts.Program): any {
     return node.literal.text;
   }
 
-  if (ts.isStringLiteral(node)) {
+  if (ts.isStringLiteral(node) || ts.isStringLiteralLike(node)) {
     return node.text;
   }
 
+  // template literals such as `smth/${string}`
+  if (ts.isTemplateLiteralTypeNode(node) || ts.isTemplateExpression(node)) {
+    return '@@INDEX@@'; // just map it to any kind of string. We can enforce it further in the future if we see fit.
+  }
+
   if (ts.isImportSpecifier(node) || ts.isExportSpecifier(node)) {
     const source = node.getSourceFile();
     const importedModuleName = getModuleSpecifier(node);
@@ -180,9 +185,9 @@ export function getDescriptor(node: ts.Node, program: ts.Program): Descriptor |
       const constraintsArray = Array.isArray(constraints) ? constraints : [constraints];
       if (typeof constraintsArray[0] === 'string') {
         return constraintsArray.reduce((acc, c) => {
-          (acc as Record<string, unknown>)[c] = descriptor;
+          acc[c] = descriptor;
           return acc;
-        }, {});
+        }, {} as Record<string, unknown>);
       }
     }
     return { '@@INDEX@@': descriptor };