Also provide CJS of code-frame and highlight (for prettier)

Gulpfile.mjs

@@ -483,6 +483,14 @@ const libBundles = [
   dest: "lib",
 }));
 
+const cjsBundles = [
+  // This is used by Prettier, @babel/register and @babel/eslint-parser
+  { src: "packages/babel-parser" },
+  // These are used by Prettier
+  { src: "packages/babel-code-frame", external: ["@babel/highlight"] },
+  { src: "packages/babel-highlight", external: ["js-tokens", "chalk"] },
+];
+
 const dtsBundles = ["packages/babel-types"];
 
 const standaloneBundle = [
@@ -536,29 +544,35 @@ gulp.task(
 
 gulp.task("build-babel", () => buildBabel(true, /* exclude */ libBundles));
 
-gulp.task("build-parser-cjs", async () => {
-  const input = "./packages/babel-parser/lib/index.js";
-  const output = "./packages/babel-parser/lib/index.cjs";
+gulp.task("build-cjs-bundles", () => {
+  return Promise.all(
+    cjsBundles.map(async ({ src, external = [] }) => {
+      const input = `./${src}/lib/index.js`;
+      const output = `./${src}/lib/index.cjs`;
 
-  const bundle = await rollup({
-    input,
-    onwarn(warning, warn) {
-      if (warning.code === "CIRCULAR_DEPENDENCY") return;
-      warn(warning);
-    },
-    plugins: [
-      rollupNodeResolve({
-        extensions: [".js", ".mjs", ".cjs", ".json"],
-        preferBuiltins: true,
-      }),
-    ],
-  });
+      const bundle = await rollup({
+        input,
+        external,
+        onwarn(warning, warn) {
+          if (warning.code === "CIRCULAR_DEPENDENCY") return;
+          warn(warning);
+        },
+        plugins: [
+          rollupCommonJs({ defaultIsModuleExports: true }),
+          rollupNodeResolve({
+            extensions: [".js", ".mjs", ".cjs", ".json"],
+            preferBuiltins: true,
+          }),
+        ],
+      });
 
-  await bundle.write({
-    file: output,
-    format: "cjs",
-    sourcemap: false,
-  });
+      await bundle.write({
+        file: output,
+        format: "cjs",
+        sourcemap: false,
+      });
+    })
+  );
 });
 
 gulp.task("build-vendor", async () => {
@@ -610,15 +624,11 @@ gulp.task(
   gulp.series(
     "build-vendor",
     gulp.parallel("build-rollup", "build-babel"),
-    gulp.parallel(
-      "build-parser-cjs",
-      "generate-type-helpers",
-      "generate-runtime-helpers"
-    ),
+    gulp.parallel("generate-type-helpers", "generate-runtime-helpers"),
     // rebuild @babel/types and @babel/helpers since
     // type-helpers and generated helpers may be changed
     "build-babel",
-    "generate-standalone"
+    gulp.parallel("generate-standalone", "build-cjs-bundles")
   )
 );
 
@@ -635,7 +645,7 @@ gulp.task(
     "build-vendor",
     "build-no-bundle",
     gulp.parallel(
-      "build-parser-cjs",
+      "build-cjs-bundles",
       "generate-standalone",
       "generate-runtime-helpers",
       gulp.series(

constraints.pro

@@ -82,6 +82,8 @@ gen_enforced_field(WorkspaceCwd, 'exports', '{ ".": "./lib/index.js", "./package
   workspace_ident(WorkspaceCwd, WorkspaceIdent),
   WorkspaceIdent \= '@babel/core',
   WorkspaceIdent \= '@babel/parser',
+  WorkspaceIdent \= '@babel/code-frame',
+  WorkspaceIdent \= '@babel/highlight',
   WorkspaceIdent \= '@babel/compat-data',
   WorkspaceIdent \= '@babel/plugin-transform-react-jsx', % TODO: Remove in Babel 8
   WorkspaceIdent \= '@babel/helper-plugin-test-runner', % TODO: Remove in Babel 8

packages/babel-code-frame/package.json

@@ -35,7 +35,10 @@
     ]
   },
   "exports": {
-    ".": "./lib/index.js",
+    ".": {
+      "require": "./lib/index.cjs",
+      "default": "./lib/index.js"
+    },
     "./package.json": "./package.json"
   },
   "type": "module"

packages/babel-highlight/package.json

@@ -35,7 +35,10 @@
     ]
   },
   "exports": {
-    ".": "./lib/index.js",
+    ".": {
+      "require": "./lib/index.cjs",
+      "default": "./lib/index.js"
+    },
     "./package.json": "./package.json"
   },
   "type": "module"