add line numbers to source output

Author: brendan-kellam

packages/mcp/src/index.ts

@@ -10,6 +10,7 @@ import { env, numberSchema } from './env.js';
 import { fileSourceRequestSchema, listCommitsQueryParamsSchema, listReposQueryParamsSchema } from './schemas.js';
 import { FileSourceRequest, ListCommitsQueryParamsSchema, ListReposQueryParams, TextContent } from './types.js';
 import _dedent from "dedent";
+import { addLineNumbers } from './utils.js';
 
 const dedent = _dedent.withOptions({ alignValues: true });
 
@@ -218,7 +219,7 @@ server.tool(
         return {
             content: [{
                 type: "text", text: JSON.stringify({
-                    source: response.source,
+                    source: addLineNumbers(response.source),
                     language: response.language,
                     path: response.path,
                     url: response.webUrl,

packages/mcp/src/utils.ts

@@ -13,4 +13,8 @@ export class ServiceErrorException extends Error {
     constructor(public readonly serviceError: ServiceError) {
         super(JSON.stringify(serviceError));
     }
+}
+
+export const addLineNumbers = (source: string, lineOffset = 1) => {
+    return source.split('\n').map((line, index) => `${index + lineOffset}:${line}`).join('\n');
 }