refactor(build): share Monaco public asset copy helper

packages/ui/scripts/monaco-public-assets.d.ts

@@ -0,0 +1,7 @@
+export type CopyMonacoPublicAssetsParams = {
+  uiRendererRoot: string
+  warn?: (message: string) => void
+  sourceRoots?: string[]
+}
+
+export function copyMonacoPublicAssets(params: CopyMonacoPublicAssetsParams): void

packages/ui/scripts/monaco-public-assets.js

@@ -0,0 +1,97 @@
+import fs from "fs"
+import { resolve } from "path"
+
+/**
+ * Copy Monaco's AMD `min/vs` assets into the UI renderer public folder.
+ *
+ * Monaco is loaded at runtime via `/monaco/vs/loader.js`. These assets are gitignored
+ * and generated on demand in dev/build so the repo stays clean.
+ *
+ * @param {object} params
+ * @param {string} params.uiRendererRoot Absolute path to `packages/ui/src/renderer`.
+ * @param {(message: string) => void} [params.warn] Warning logger.
+ * @param {string[]} [params.sourceRoots] Optional override list of `.../monaco-editor/min/vs` roots.
+ */
+export function copyMonacoPublicAssets(params) {
+  const uiRendererRoot = params?.uiRendererRoot
+  if (!uiRendererRoot) {
+    throw new Error("copyMonacoPublicAssets: uiRendererRoot is required")
+  }
+
+  const warn = params?.warn ?? ((message) => console.warn(message))
+  const publicDir = resolve(uiRendererRoot, "public")
+  const destRoot = resolve(publicDir, "monaco/vs")
+
+  const candidates =
+    params?.sourceRoots?.length > 0
+      ? params.sourceRoots
+      : [
+          // Workspace root hoisted deps.
+          resolve(process.cwd(), "node_modules/monaco-editor/min/vs"),
+          // UI package local deps (covers non-hoisted installs).
+          resolve(process.cwd(), "packages/ui/node_modules/monaco-editor/min/vs"),
+        ]
+
+  const sourceRoot = candidates.find((p) => fs.existsSync(resolve(p, "loader.js")))
+  if (!sourceRoot) {
+    warn("Monaco source directory not found; skipping copy")
+    return
+  }
+
+  const copyRecursive = (src, dest) => {
+    const stat = fs.statSync(src)
+    if (stat.isDirectory()) {
+      fs.mkdirSync(dest, { recursive: true })
+      for (const entry of fs.readdirSync(src)) {
+        copyRecursive(resolve(src, entry), resolve(dest, entry))
+      }
+      return
+    }
+    fs.copyFileSync(src, dest)
+  }
+
+  // Keep the working tree clean; these assets are generated.
+  try {
+    fs.rmSync(destRoot, { recursive: true, force: true })
+  } catch {
+    // ignore
+  }
+  fs.mkdirSync(destRoot, { recursive: true })
+
+  // Copy core Monaco runtime.
+  for (const dir of ["base", "editor", "platform"]) {
+    const src = resolve(sourceRoot, dir)
+    if (fs.existsSync(src)) {
+      copyRecursive(src, resolve(destRoot, dir))
+    }
+  }
+
+  // loader.js is required.
+  copyRecursive(resolve(sourceRoot, "loader.js"), resolve(destRoot, "loader.js"))
+
+  // Copy baseline rich language packages + workers.
+  for (const lang of ["typescript", "html", "json", "css"]) {
+    const src = resolve(sourceRoot, "language", lang)
+    if (fs.existsSync(src)) {
+      copyRecursive(src, resolve(destRoot, "language", lang))
+    }
+  }
+
+  // Copy baseline basic tokenizers.
+  for (const lang of ["python", "markdown", "cpp", "kotlin"]) {
+    const src = resolve(sourceRoot, "basic-languages", lang)
+    if (fs.existsSync(src)) {
+      copyRecursive(src, resolve(destRoot, "basic-languages", lang))
+    }
+  }
+
+  // Copy monaco.contribution.js entrypoints (needed by some loads).
+  const monacoContribution = resolve(sourceRoot, "basic-languages", "monaco.contribution.js")
+  if (fs.existsSync(monacoContribution)) {
+    copyRecursive(monacoContribution, resolve(destRoot, "basic-languages", "monaco.contribution.js"))
+  }
+  const underscoreContribution = resolve(sourceRoot, "basic-languages", "_.contribution.js")
+  if (fs.existsSync(underscoreContribution)) {
+    copyRecursive(underscoreContribution, resolve(destRoot, "basic-languages", "_.contribution.js"))
+  }
+}