fix: point to correctly exported files in jest-repl

CHANGELOG.md

@@ -7,6 +7,7 @@
 ### Fixes
 
 - `[expect]` Add type definitions for asymmetric `closeTo` matcher ([#12304](https://github.com/facebook/jest/pull/12304))
+- `[jest-repl]` Make module importable ([#12311](https://github.com/facebook/jest/pull/12311))
 
 ### Chore & Maintenance
 

packages/jest-repl/package.json

@@ -7,12 +7,12 @@
     "directory": "packages/jest-repl"
   },
   "license": "MIT",
-  "main": "./build/index.js",
-  "types": "./build/index.d.ts",
+  "main": "./build/cli/index.js",
+  "types": "./build/cli/index.d.ts",
   "exports": {
     ".": {
-      "types": "./build/index.d.ts",
-      "default": "./build/index.js"
+      "types": "./build/cli/index.d.ts",
+      "default": "./build/cli/index.js"
     },
     "./package.json": "./package.json",
     "./bin/jest-repl": "./bin/jest-repl.js",

scripts/build.js

@@ -20,6 +20,7 @@
 
 'use strict';
 
+const assert = require('assert');
 const fs = require('fs');
 const path = require('path');
 const babel = require('@babel/core');
@@ -56,15 +57,20 @@ function getBuildPath(file, buildFolder) {
   return path.resolve(pkgBuildPath, relativeToSrcPath).replace(/\.ts$/, '.js');
 }
 
-function buildNodePackage(p) {
-  const srcDir = path.resolve(p, SRC_DIR);
+function buildNodePackage({packageDir, pkg}) {
+  const srcDir = path.resolve(packageDir, SRC_DIR);
   const pattern = path.resolve(srcDir, '**/*');
   const files = glob.sync(pattern, {nodir: true});
 
-  process.stdout.write(adjustToTerminalWidth(`${path.basename(p)}\n`));
+  process.stdout.write(adjustToTerminalWidth(`${pkg.name}\n`));
 
   files.forEach(file => buildFile(file, true));
 
+  assert.ok(
+    fs.existsSync(path.resolve(packageDir, pkg.main)),
+    `Main file "${pkg.main}" in ${pkg.name} should exist`,
+  );
+
   process.stdout.write(`${OK}\n`);
 }
 
@@ -142,5 +148,5 @@ if (files.length) {
 } else {
   const packages = getPackages();
   process.stdout.write(chalk.inverse(' Building packages \n'));
-  packages.map(({packageDir}) => packageDir).forEach(buildNodePackage);
+  packages.forEach(buildNodePackage);
 }