fix(bundling): fallback to manual file resolution if tsconfig-paths fails

e2e/vite/src/vite.test.ts

@@ -11,6 +11,7 @@ import {
   promisifiedTreeKill,
   readFile,
   readJson,
+  removeFile,
   rmDist,
   runCLI,
   runCLIAsync,
@@ -267,22 +268,21 @@ describe('Vite Plugin', () => {
       const buildableJsLibFn = names(`${lib}-js`).propertyName;
 
       updateFile(`apps/${app}/src/app/app.tsx`, () => {
-        return `// eslint-disable-next-line @typescript-eslint/no-unused-vars
+        return `
 import styles from './app.module.css';
-
 import NxWelcome from './nx-welcome';
 import { ${buildableLibCmp} } from '@acme/buildable';
 import { ${buildableJsLibFn} } from '@acme/js-lib';
 import { ${nonBuildableLibCmp} } from '@acme/non-buildable';
 
 export function App() {
   return (
-    <div>
-      <${buildableLibCmp} />
-      <${nonBuildableLibCmp} />
-      <p>{${buildableJsLibFn}()}</p>
-      <NxWelcome title="${app}" />
-    </div>
+     <div>
+       <${buildableLibCmp} />
+       <${nonBuildableLibCmp} />
+       <p>{${buildableJsLibFn}()}</p>
+       <NxWelcome title="${app}" />
+      </div>
   );
 }
 export default App;
@@ -307,6 +307,24 @@ export default App;
       // this should be less modules than building from source
       expect(results).toContain('38 modules transformed');
     });
+
+    it('should build app from libs without package.json in lib', () => {
+      removeFile(`libs/${lib}-buildable/package.json`);
+
+      const buildFromSourceResults = runCLI(
+        `build ${app} --buildLibsFromSource=true`
+      );
+      expect(buildFromSourceResults).toContain(
+        'Successfully ran target build for project'
+      );
+
+      const noBuildFromSourceResults = runCLI(
+        `build ${app} --buildLibsFromSource=false`
+      );
+      expect(noBuildFromSourceResults).toContain(
+        'Successfully ran target build for project'
+      );
+    });
   });
 
   describe('should be able to create libs that use vitest', () => {

packages/vite/plugins/nx-tsconfig-paths.plugin.ts

@@ -1,11 +1,49 @@
 import { stripIndents, workspaceRoot } from '@nx/devkit';
 import { existsSync } from 'node:fs';
 import { relative, join, resolve } from 'node:path';
-import { loadConfig, createMatchPath, MatchPath } from 'tsconfig-paths';
+import {
+  loadConfig,
+  createMatchPath,
+  MatchPath,
+  ConfigLoaderSuccessResult,
+} from 'tsconfig-paths';
 
-export function nxViteTsPaths() {
+export interface nxViteTsPathsOptions {
+  /**
+   * Enable debug logging
+   * @default false
+   **/
+  debug?: boolean;
+  /**
+   * export fields in package.json to use for resolving
+   * @default [['exports', '.', 'import'], 'module', 'main']
+   *
+   * fallback resolution will use ['main', 'module']
+   **/
+  mainFields?: (string | string[])[];
+  /**
+   * extensions to check when resolving files when package.json resolution fails
+   * @default ['.ts', '.tsx', '.js', '.jsx', '.json', '.mjs', '.cjs']
+   **/
+  extensions?: string[];
+}
+
+export function nxViteTsPaths(options: nxViteTsPathsOptions = {}) {
   let matchTsPathEsm: MatchPath;
   let matchTsPathFallback: MatchPath | undefined;
+  let tsConfigPathsEsm: ConfigLoaderSuccessResult;
+  let tsConfigPathsFallback: ConfigLoaderSuccessResult;
+
+  options.extensions ??= [
+    '.ts',
+    '.tsx',
+    '.js',
+    '.jsx',
+    '.json',
+    '.mjs',
+    '.cjs',
+  ];
+  options.mainFields ??= [['exports', '.', 'import'], 'module', 'main'];
 
   return {
     name: 'nx-vite-ts-paths',
@@ -31,59 +69,104 @@ There should at least be a tsconfig.base.json or tsconfig.json in the root of th
       if (parsed.resultType === 'failed') {
         throw new Error(`Failed loading tsonfig at ${foundTsConfigPath}`);
       }
+      tsConfigPathsEsm = parsed;
 
-      matchTsPathEsm = createMatchPath(parsed.absoluteBaseUrl, parsed.paths, [
-        ['exports', '.', 'import'],
-        'module',
-        'main',
-      ]);
+      matchTsPathEsm = createMatchPath(
+        parsed.absoluteBaseUrl,
+        parsed.paths,
+        options.mainFields
+      );
 
       const rootLevelTsConfig = getTsConfig(
         join(workspaceRoot, 'tsconfig.base.json')
       );
       const rootLevelParsed = loadConfig(rootLevelTsConfig);
       logIt('fallback parsed tsconfig: ', rootLevelParsed);
       if (rootLevelParsed.resultType === 'success') {
+        tsConfigPathsFallback = rootLevelParsed;
         matchTsPathFallback = createMatchPath(
           rootLevelParsed.absoluteBaseUrl,
           rootLevelParsed.paths,
           ['main', 'module']
         );
       }
     },
-    resolveId(source: string) {
+    resolveId(importPath: string) {
       let resolvedFile: string;
       try {
-        resolvedFile = matchTsPathEsm(source);
+        resolvedFile = matchTsPathEsm(importPath);
       } catch (e) {
         logIt('Using fallback path matching.');
-        resolvedFile = matchTsPathFallback?.(source);
+        resolvedFile = matchTsPathFallback?.(importPath);
       }
 
       if (!resolvedFile) {
-        logIt(`Unable to resolve ${source} with tsconfig paths`);
+        if (tsConfigPathsEsm || tsConfigPathsFallback) {
+          logIt(
+            `Unable to resolve ${importPath} with tsconfig paths. Using fallback file matching.`
+          );
+          resolvedFile =
+            loadFileFromPaths(tsConfigPathsEsm, importPath) ||
+            loadFileFromPaths(tsConfigPathsFallback, importPath);
+        } else {
+          logIt(`Unable to resolve ${importPath} with tsconfig paths`);
+        }
       }
 
-      return resolvedFile;
+      logIt(`Resolved ${importPath} to ${resolvedFile}`);
+      // Returning null defers to other resolveId functions and eventually the default resolution behavior
+      // https://rollupjs.org/plugin-development/#resolveid
+      return resolvedFile || null;
     },
   };
-}
 
-function getTsConfig(preferredTsConfigPath: string): string {
-  return [
-    resolve(preferredTsConfigPath),
-    resolve(join(workspaceRoot, 'tsconfig.base.json')),
-    resolve(join(workspaceRoot, 'tsconfig.json')),
-  ].find((tsPath) => {
-    if (existsSync(tsPath)) {
-      logIt('Found tsconfig at', tsPath);
-      return tsPath;
+  function getTsConfig(preferredTsConfigPath: string): string {
+    return [
+      resolve(preferredTsConfigPath),
+      resolve(join(workspaceRoot, 'tsconfig.base.json')),
+      resolve(join(workspaceRoot, 'tsconfig.json')),
+    ].find((tsPath) => {
+      if (existsSync(tsPath)) {
+        logIt('Found tsconfig at', tsPath);
+        return tsPath;
+      }
+    });
+  }
+
+  function logIt(...msg: any[]) {
+    if (process.env.NX_VERBOSE_LOGGING === 'true' || options?.debug) {
+      console.debug('\n[Nx Vite TsPaths]', ...msg);
     }
-  });
-}
+  }
 
-function logIt(...msg: any[]) {
-  if (process.env.NX_VERBOSE_LOGGING === 'true') {
-    console.debug('[Nx Vite TsPaths]', ...msg);
+  function loadFileFromPaths(
+    tsconfig: ConfigLoaderSuccessResult,
+    importPath: string
+  ) {
+    logIt(
+      `Trying to resolve file from config in ${tsconfig.configFileAbsolutePath}`
+    );
+    let resolvedFile: string;
+    for (const alias in tsconfig.paths) {
+      const paths = tsconfig.paths[alias];
+
+      const normalizedImport = alias.replace(/\/\*$/, '');
+
+      if (importPath.startsWith(normalizedImport)) {
+        const path = (tsconfig.absoluteBaseUrl, paths[0].replace(/\/\*$/, ''));
+        resolvedFile = findFile(importPath.replace(normalizedImport, path));
+      }
+    }
+
+    return resolvedFile;
+  }
+
+  function findFile(path: string): string {
+    for (const ext of options.extensions) {
+      const r = resolve(path + ext);
+      if (existsSync(r)) {
+        return r;
+      }
+    }
   }
 }