fix(adapter-vite): add workspace alias generation to build-ssg too

- Extract findWorkspaceRoot/generateWorkspaceAliases to shared module
  (workspace-alias.ts), imported by both build-client and build-ssg
- build-ssg now auto-generates aliases for Phase 3 SSR bundle build
- Fixes @lessjs/core/render-dsd resolution failure in virtual:less-ssg-entry

Author: LessJS Bot

packages/adapter-vite/src/cli/build-client.ts

@@ -8,10 +8,6 @@
  * closeBundle() in less:build plugin. No longer a standalone CLI entry.
  * ctx parameter is required (no globalThis fallback).
  *
- * Resolution: Aliases are auto-generated from workspace packages'
- * deno.json exports — not hardcoded, not in user config. When Vite/rolldown
- * supports Deno workspace resolution natively, this can be removed.
- *
  * Usage:
  *   deno task build  (unified entry — runs all 3 phases)
  */
@@ -22,77 +18,16 @@ import process from 'node:process';
 import { type ClientIslandEntry, generateClientEntry } from '../entry-generators.js';
 import type { LessBuildContext } from '../build-context.js';
 import { createLogger } from '@lessjs/core/logger';
+import {
+  findWorkspaceRoot,
+  generateWorkspaceAliases,
+} from '../workspace-alias.js';
 
 const log = createLogger('ssg');
 
 const VIRTUAL_CLIENT_ENTRY_ID = 'virtual:less-client-entry';
 const RESOLVED_CLIENT_ENTRY_ID = '\0' + VIRTUAL_CLIENT_ENTRY_ID;
 
-// ─── Alias auto-generation from workspace ────────────────────────────
-
-interface AliasEntry {
-  find: string;
-  replacement: string;
-}
-
-/**
- * Walk up from startDir to find a deno.json with a "workspace" field.
- */
-async function findWorkspaceRoot(startDir: string): Promise<string | null> {
-  let dir = resolve(startDir);
-  const fsRoot = resolve('/');
-  while (dir !== fsRoot && dir !== resolve(dir, '..')) {
-    try {
-      const cfg = JSON.parse(await Deno.readTextFile(resolve(dir, 'deno.json')));
-      if (cfg.workspace && Array.isArray(cfg.workspace)) return dir;
-    } catch { /* not found or no workspace */ }
-    dir = resolve(dir, '..');
-  }
-  return null;
-}
-
-/**
- * Generate Vite resolve.alias from workspace packages' deno.json exports.
- * Subpath aliases come before parent (Vite prefix matching rule).
- */
-async function generateWorkspaceAliases(workspaceRoot: string): Promise<AliasEntry[]> {
-  const rootCfg = JSON.parse(await Deno.readTextFile(resolve(workspaceRoot, 'deno.json')));
-  const members: string[] = rootCfg.workspace || [];
-  const aliases: AliasEntry[] = [];
-
-  for (const member of members) {
-    const memberDir = resolve(workspaceRoot, member);
-    let memberCfg: Record<string, unknown>;
-    try {
-      memberCfg = JSON.parse(await Deno.readTextFile(resolve(memberDir, 'deno.json')));
-    } catch {
-      continue;
-    }
-    const name = memberCfg.name as string | undefined;
-    const exports = memberCfg.exports as Record<string, string> | string | undefined;
-    if (!name || !exports) continue;
-
-    if (typeof exports === 'string') {
-      aliases.push({ find: name, replacement: resolve(memberDir, exports) });
-      continue;
-    }
-
-    // Subpath aliases first (Vite prefix matching)
-    for (const [exportPath, sourcePath] of Object.entries(exports)) {
-      if (exportPath === '.') continue;
-      const subpath = exportPath.replace(/^\.\//, '/');
-      aliases.push({ find: `${name}${subpath}`, replacement: resolve(memberDir, sourcePath as string) });
-    }
-    // Parent alias last
-    if (exports['.']) {
-      aliases.push({ find: name, replacement: resolve(memberDir, exports['.'] as string) });
-    }
-  }
-  return aliases;
-}
-
-// ─── Build function ──────────────────────────────────────────────────
-
 async function buildClient(ctx: LessBuildContext): Promise<void> {
   const root = ctx.root || process.cwd();
   const outDir = ctx.outDir || 'dist';
@@ -101,8 +36,8 @@ async function buildClient(ctx: LessBuildContext): Promise<void> {
   const localIslandFiles = ctx.islandFiles || [];
   const packageIslands = ctx.packageIslands || [];
 
-  // Auto-generate aliases from workspace
-  let serializedAlias: AliasEntry[] | null = null;
+  // Auto-generate aliases from workspace packages
+  let serializedAlias = null;
   const workspaceRoot = await findWorkspaceRoot(root);
   if (workspaceRoot) {
     serializedAlias = await generateWorkspaceAliases(workspaceRoot);

packages/adapter-vite/src/cli/build-ssg.ts

@@ -22,6 +22,10 @@ import type { LessBuildContext } from '../build-context.js';
 import { SsrRenderError } from '@lessjs/core/errors';
 import { createLogger } from '@lessjs/core/logger';
 import { createBlogDataPlugin, createI18nDataPlugin } from '../virtual-data.js';
+import {
+  findWorkspaceRoot,
+  generateWorkspaceAliases,
+} from '../workspace-alias.js';
 
 const log = createLogger('ssg');
 
@@ -216,9 +220,16 @@ async function buildSSG(options: BuildSSGOptions = {}, ctx: LessBuildContext): P
     const ssrOutDir = join(root, outDir, 'server');
     log.info(`Building SSR bundle → ${ssrOutDir}`);
 
+    // Auto-generate aliases from workspace packages
+    const ssgAliases = await (async () => {
+      const wsRoot = await findWorkspaceRoot(root);
+      return wsRoot ? await generateWorkspaceAliases(wsRoot) : null;
+    })();
+
     await viteBuild({
       configFile: false,
       root,
+      resolve: ssgAliases ? { alias: ssgAliases } : undefined,
       build: {
         ssr: true,
         outDir: ssrOutDir,

packages/adapter-vite/src/workspace-alias.ts

@@ -0,0 +1,74 @@
+/**
+ * @lessjs/adapter-vite - Workspace alias auto-generation
+ *
+ * Reads Deno workspace deno.json exports and generates
+ * Vite resolve.alias entries. Used by build-client and build-ssg
+ * to resolve @lessjs/* packages when rolldown doesn't support
+ * Deno workspace resolution natively.
+ */
+
+import { resolve } from 'node:path';
+
+export interface AliasEntry {
+  find: string;
+  replacement: string;
+}
+
+/**
+ * Walk up from startDir to find a deno.json with a "workspace" field.
+ */
+export async function findWorkspaceRoot(startDir: string): Promise<string | null> {
+  let dir = resolve(startDir);
+  const fsRoot = resolve('/');
+  while (dir !== fsRoot && dir !== resolve(dir, '..')) {
+    try {
+      const cfg = JSON.parse(await Deno.readTextFile(resolve(dir, 'deno.json')));
+      if (cfg.workspace && Array.isArray(cfg.workspace)) return dir;
+    } catch { /* not found or no workspace */ }
+    dir = resolve(dir, '..');
+  }
+  return null;
+}
+
+/**
+ * Generate Vite resolve.alias from workspace packages' deno.json exports.
+ * Subpath aliases come before parent (Vite prefix matching rule).
+ */
+export async function generateWorkspaceAliases(workspaceRoot: string): Promise<AliasEntry[]> {
+  const rootCfg = JSON.parse(await Deno.readTextFile(resolve(workspaceRoot, 'deno.json')));
+  const members: string[] = rootCfg.workspace || [];
+  const aliases: AliasEntry[] = [];
+
+  for (const member of members) {
+    const memberDir = resolve(workspaceRoot, member);
+    let memberCfg: Record<string, unknown>;
+    try {
+      memberCfg = JSON.parse(await Deno.readTextFile(resolve(memberDir, 'deno.json')));
+    } catch {
+      continue;
+    }
+    const name = memberCfg.name as string | undefined;
+    const exports = memberCfg.exports as Record<string, string> | string | undefined;
+    if (!name || !exports) continue;
+
+    if (typeof exports === 'string') {
+      aliases.push({ find: name, replacement: resolve(memberDir, exports) });
+      continue;
+    }
+
+    // Subpath aliases first (Vite prefix matching)
+    for (const [exportPath, sourcePath] of Object.entries(exports)) {
+      if (exportPath === '.') continue;
+      const subpath = exportPath.replace(/^\.\//, '/');
+      aliases.push({
+        find: `${name}${subpath}`,
+        replacement: resolve(memberDir, sourcePath as string),
+      });
+    }
+    // Parent alias last
+    if (exports['.']) {
+      aliases.push({ find: name, replacement: resolve(memberDir, exports['.'] as string) });
+    }
+  }
+  return aliases;
+}