fix(core): fix plugin error indexes (#29936)

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## Current Behavior
<!-- This is the behavior we have today -->

The errors were misaligned to the plugin index they pertained to.

## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR
-->

The errors are not misaligned to the plugin index they pertain to.

## Related Issue(s)
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merged. -->

Fixes #

packages/nx/src/project-graph/error-types.ts

@@ -280,7 +280,12 @@ export function formatAggregateCreateNodesError(
   const errorBodyLines = [
     `${
       error.errors.length > 1 ? `${error.errors.length} errors` : 'An error'
-    } occurred while processing files for the ${pluginName} plugin.`,
+    } occurred while processing files for the ${pluginName} plugin${
+      error.pluginIndex
+        ? ` (Defined at nx.json#plugins[${error.pluginIndex}])`
+        : ''
+    }`,
+    `.`,
   ];
   const errorStackLines = [];
 

packages/nx/src/project-graph/plugins/get-plugins.ts

@@ -159,7 +159,7 @@ async function loadSpecifiedNxPlugins(
   const cleanupFunctions: Array<() => void> = [];
   const ret = [
     await Promise.all(
-      plugins.map(async (plugin) => {
+      plugins.map(async (plugin, index) => {
         const pluginPath = typeof plugin === 'string' ? plugin : plugin.plugin;
         performance.mark(`Load Nx Plugin: ${pluginPath} - start`);
 
@@ -170,6 +170,7 @@ async function loadSpecifiedNxPlugins(
 
         cleanupFunctions.push(cleanup);
         const res = await loadedPluginPromise;
+        res.index = index;
         performance.mark(`Load Nx Plugin: ${pluginPath} - end`);
         performance.measure(
           `Load Nx Plugin: ${pluginPath}`,

packages/nx/src/project-graph/plugins/loaded-nx-plugin.ts

@@ -20,6 +20,7 @@ import { isIsolationEnabled } from './isolation/enabled';
 import { isDaemonEnabled } from '../../daemon/client/client';
 
 export class LoadedNxPlugin {
+  index?: number;
   readonly name: string;
   readonly createNodes?: [
     filePattern: string,

packages/nx/src/project-graph/utils/project-configuration-utils.ts

@@ -16,19 +16,19 @@ import { performance } from 'perf_hooks';
 
 import { LoadedNxPlugin } from '../plugins/loaded-nx-plugin';
 import {
-  MergeNodesError,
-  ProjectConfigurationsError,
-  ProjectsWithNoNameError,
-  MultipleProjectsWithSameNameError,
+  AggregateCreateNodesError,
+  formatAggregateCreateNodesError,
+  isAggregateCreateNodesError,
   isMultipleProjectsWithSameNameError,
   isProjectsWithNoNameError,
-  ProjectWithNoNameError,
-  ProjectWithExistingNameError,
   isProjectWithExistingNameError,
   isProjectWithNoNameError,
-  isAggregateCreateNodesError,
-  AggregateCreateNodesError,
-  formatAggregateCreateNodesError,
+  MergeNodesError,
+  MultipleProjectsWithSameNameError,
+  ProjectConfigurationsError,
+  ProjectsWithNoNameError,
+  ProjectWithExistingNameError,
+  ProjectWithNoNameError,
 } from '../error-types';
 import { CreateNodesResult } from '../plugins/public-api';
 import { isGlobPattern } from '../../utils/globs';
@@ -377,7 +377,13 @@ export async function createProjectConfigurationsWithPlugins(
   // We iterate over plugins first - this ensures that plugins specified first take precedence.
   for (const [
     index,
-    { createNodes: createNodesTuple, include, exclude, name: pluginName },
+    {
+      index: pluginIndex,
+      createNodes: createNodesTuple,
+      include,
+      exclude,
+      name: pluginName,
+    },
   ] of plugins.entries()) {
     const [pattern, createNodes] = createNodesTuple ?? [];
 
@@ -403,8 +409,10 @@ export async function createProjectConfigurationsWithPlugins(
             e
           : // This represents a single plugin erroring out with a hard error.
             new AggregateCreateNodesError([[null, e]], []);
+        if (pluginIndex) {
+          error.pluginIndex = pluginIndex;
+        }
         formatAggregateCreateNodesError(error, pluginName);
-        error.pluginIndex = index;
         // This represents a single plugin erroring out with a hard error.
         errors.push(error);
         // The plugin didn't return partial results, so we return an empty array.
@@ -458,7 +466,7 @@ function mergeCreateNodesResults(
     plugin: string,
     file: string,
     result: CreateNodesResult,
-    index?: number
+    pluginIndex?: number
   ])[][],
   nxJsonConfiguration: NxJsonConfiguration,
   errors: (
@@ -477,7 +485,7 @@ function mergeCreateNodesResults(
   > = {};
 
   for (const result of results.flat()) {
-    const [pluginName, file, nodes, index] = result;
+    const [pluginName, file, nodes, pluginIndex] = result;
 
     const { projects: projectNodes, externalNodes: pluginExternalNodes } =
       nodes;
@@ -506,7 +514,7 @@ function mergeCreateNodesResults(
             file,
             pluginName,
             error,
-            pluginIndex: index,
+            pluginIndex,
           })
         );
       }

packages/nx/src/project-graph/utils/retrieve-workspace-files.ts

@@ -78,7 +78,7 @@ export async function retrieveProjectConfigurations(
     workspaceRoot,
     nxJson,
     pluginConfigFiles,
-    plugins
+    pluginsWithCreateNodes
   );
 }