fix(@angular-devkit/build-angular): attempt relative global script read first in esbuild builder

When using a global script (`scripts` option) with the esbuild-based browser application builder,
an attempt to read the script as a relative path from the workspace root will be performed first.
This avoids the need to perform a potentially expensive module resolution attempt for files that
are directly available and also ensures the relative paths are given priority over any potential
modules with the same name. This matches prior behavior that also preferred relative paths.

Author: clydin

packages/angular_devkit/build_angular/src/builders/browser-esbuild/global-scripts.ts

@@ -10,6 +10,8 @@ import type { BuildOptions } from 'esbuild';
 import MagicString, { Bundle } from 'magic-string';
 import assert from 'node:assert';
 import { readFile } from 'node:fs/promises';
+import path from 'node:path';
+import { assertIsError } from '../../utils/error';
 import { NormalizedBrowserOptions } from './options';
 import { createSourcemapIngorelistPlugin } from './sourcemap-ignorelist-plugin';
 
@@ -96,23 +98,36 @@ export function createGlobalScriptsBundleOptions(
             // Global scripts are concatenated using magic-string instead of bundled via esbuild.
             const bundleContent = new Bundle();
             for (const filename of files) {
-              const resolveResult = await build.resolve(filename, {
-                kind: 'entry-point',
-                resolveDir: workspaceRoot,
-              });
+              let fileContent;
+              try {
+                // Attempt to read as a relative path from the workspace root
+                fileContent = await readFile(path.join(workspaceRoot, filename), 'utf-8');
+              } catch (e) {
+                assertIsError(e);
+                if (e.code !== 'ENOENT') {
+                  throw e;
+                }
 
-              if (resolveResult.errors.length) {
-                // Remove resolution failure notes about marking as external since it doesn't apply
-                // to global scripts.
-                resolveResult.errors.forEach((error) => (error.notes = []));
+                // If not found attempt to resolve as a module specifier
+                const resolveResult = await build.resolve(filename, {
+                  kind: 'entry-point',
+                  resolveDir: workspaceRoot,
+                });
 
-                return {
-                  errors: resolveResult.errors,
-                  warnings: resolveResult.warnings,
-                };
+                if (resolveResult.errors.length) {
+                  // Remove resolution failure notes about marking as external since it doesn't apply
+                  // to global scripts.
+                  resolveResult.errors.forEach((error) => (error.notes = []));
+
+                  return {
+                    errors: resolveResult.errors,
+                    warnings: resolveResult.warnings,
+                  };
+                }
+
+                fileContent = await readFile(resolveResult.path, 'utf-8');
               }
 
-              const fileContent = await readFile(resolveResult.path, 'utf-8');
               bundleContent.addSource(new MagicString(fileContent, { filename }));
             }